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AI 101

What is Natural Language Processing?

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Natural Language Processing (NLP) is the study and application of techniques and tools that enable computers to process, analyze, interpret, and reason about human language. NLP is an interdisciplinary field and it combines techniques established in fields like linguistics and computer science. These techniques are used in concert with AI to create chatbots and digital assistants like Google Assistant and Amazon’s Alexa.

Let’s take some time to explore the rationale behind Natural Language Processing, some of the techniques used in NLP, and some common uses cases for NLP.

Why Is Natural Language Processing Important?

In order for computers to interpret human language, they must be converted into a form that a computer can manipulate. However, this isn’t as simple as converting text data into numbers. In order to derive meaning from human language, patterns have to be extracted from the hundreds or thousands of words that make up a text document. This is no easy task. There are few hard and fast rules that can be applied to the interpretation of human language. For instance, the exact same set of words can mean different things depending on the context. Human language is a complex and often ambiguous thing, and a statement can be uttered with sincerity or sarcasm.

Despite this, there are some general guidelines that can be used when interpreting words and characters, such as the character “s” being used to denote that an item is plural. These general guidelines have to be used in concert with each other to extract meaning from the text, to create features that a machine learning algorithm can interpret.

Natural Language Processing involves the application of various algorithms capable of taking unstructured data and converting it into structured data. If these algorithms are applied in the wrong manner, the computer will often fail to derive the correct meaning from the text. This can often be seen in the translation of text between languages, where the precise meaning of the sentence is often lost. While machine translation has improved substantially over the past few years, machine translation errors still occur frequently.

Natural Language Processing Techniques

Photo: Tamur via WikiMedia Commons, Public Domain (https://commons.wikimedia.org/wiki/File:ParseTree.svg)

Many of the techniques that are used in natural language processing can be placed in one of two categories: syntax or semantics. Syntax techniques are those that deal with the ordering of words, while semantic techniques are the techniques that involve the meaning of words.

Syntax NLP Techniques

Examples of syntax include:

  • Lemmatization
  • Morphological Segmentation
  • Part-of-Speech Tagging
  • Parsing
  • Sentence Breaking
  • Stemming
  • Word Segmentation

Lemmatization refers to distilling the different inflections of a word down to a single form. Lemmatization takes things like tenses and plurals and simplifies them, for example, “feet” might become “foot” and “stripes” may become “stripe”.  This simplified word form makes it easier for an algorithm to interpret the words in a document.

Morphological segmentation is the process of dividing words into morphemes or the base units of a word. These units are things like free morphemes (which can stand alone as words) and prefixes or suffixes.

Part-of-speech tagging is simply the process of identifying which part of speech every word in an input document is.

Parsing refers to analyzing all the words in a sentence and correlating them with their formal grammar labels or doing grammatical analysis for all the words.

Sentence breaking, or sentence boundary segmentation, refers to deciding where a sentence begins and ends.

Stemming is the process of reducing words down to the root form of the word. For instance, connected, connection, and connections would all be stemmed to “connect”.

Word Segmentation is the process of dividing large pieces of text down into small units, which can be words or stemmed/lemmatized units.

Semantic NLP Techniques

Semantic NLP techniques include techniques like:

  • Named Entity Recognition
  • Natural Language Generation
  • Word-Sense disambiguation

Named entity recognition involves tagging certain text portions that can be placed into one of a number of different preset groups. Pre-defined categories include things like dates, cities, places, companies, and individuals.

Natural language generation is the process of using databases to transform structured data into natural language. For instance, statistics about the weather, like temperature and wind speed could be summarized with natural language.

Word-sense disambiguation is the process of assigning meaning to words within a text based on the context the words appear in.

Deep Learning Models For Natural Language Processing

Regular multilayer perceptrons are unable to handle the interpretation of sequential data, where the order of the information is important. In order to deal with the importance of order in sequential data, a type of neural network is used that preserves information from previous timesteps in the training.

Recurrent Neural Networks are types of neural networks that loop over data from previous timesteps, taking them into account when calculating the weights of the current timestep. Essentially, RNN’s have three parameters that are used during the forward training pass: a matrix based on the Previous Hidden State, a matrix based on the Current Input, and a matrix that is between the hidden state and the output. Because RNNs can take information from previous timesteps into account, they can extract relevant patterns from text data by taking earlier words in the sentence into account when interpreting the meaning of a word.

Another type of deep learning architecture used to process text data is a Long Short-Term Memory (LSTM) network. LSTM networks are similar to RNNs in structure, but owing to some differences in their architecture they tend to perform better than RNNs. They avoid a specific problem that often occurs when using RNNs called the exploding gradient problem.

These deep neural networks can be either unidirectional or bi-directional. Bi-directional networks are capable of taking not just the words that come prior to the current word into account, but the words that come after it. While this leads to higher accuracy, it is more computationally expensive.

Use Cases For Natural Language Processing

Photo: mohammed_hassan via Pixabay, Pixabay License (https://pixabay.com/illustrations/chatbot-chat-application-artificial-3589528/)

Because Natural Language Processing involves the analysis and manipulation of human languages, it has an incredibly wide range of applications. Possible applications for NLP include chatbots, digital assistants, sentiment analysis, document organization, talent recruitment, and healthcare.

Chatbots and digital assistants like Amazon’s Alexa and Google Assistant are examples of voice recognition and synthesis platforms that use NLP to interpret and respond to vocal commands. These digital assistants help people with a wide variety of tasks, letting them offload some of their cognitive tasks to another device and free up some of their brainpower for other, more important things. Instead of looking up the best route to the bank on a busy morning, we can just have our digital assistant do it.

Sentiment analysis is the use of NLP techniques to study people’s reactions and feelings to a phenomenon, as communicated by their use of language. Capturing the sentiment of a statement, like interpreting whether a review of a product is good or bad, can provide companies with substantial information regarding how their product is being received.

Automatically organizing text documents is another application of NLP. Companies like Google and Yahoo use NLP algorithms to classify email documents, putting them in the appropriate bins such as “social” or “promotions”. They also use these techniques to identify spam and prevent it from reaching your inbox.

Groups have also developed NLP techniques are being used to identify potential job hires, finding them based on relevant skills. Hiring managers are also using NLP techniques to help them sort through lists of applicants.

NLP techniques are also being used to enhance healthcare. NLP can be used to improve the detection of diseases. Health records can be analyzed and symptoms extracted by NLP algorithms, which can then be used to suggest possible diagnoses. One example of this is Amazon’s Comprehend Medical platform, which analyzes health records and extracts diseases and treatments. Healthcare applications of NLP also extend to mental health. There are apps such as WoeBot, which talks users through a variety of anxiety management techniques based in Cognitive Behavioral Therapy.

To Learn More

Recommended Natural Language Processing CoursesOffered ByDurationDifficulty


Introduction to Artificial Intelligence



IBM

9 Hours

Beginner


Natural Language Processing in TensorFlow


Deep Learning AI

9 Hours

Intermediate


An Introduction to Practical Deep Learning


Intel Software

12 Hours

Intermediate


Natural Language Processing


Higher School of Economics

34 Hours

Advanced
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Blogger and programmer with specialties in Machine Learning and Deep Learning topics. Daniel hopes to help others use the power of AI for social good.

AI 101

What are Quantum Computers?

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Quantum computers have the potential to dramatically increase the variety and accuracy of computations, opening up new applications for computers and enhancing our models of physical phenomenon. Yet while quantum computers are seeing increasing media coverage, many still aren’t sure of how quantum computers differ from regular computers. Let’s examine how quantum computers work, some of their applications, and their coming future.

What Is A Quantum Computer?

Before we can meaningfully examine how quantum computers operate, we need to first define quantum computers. The short definition of a quantum computer is this: a computer, based on quantum mechanics, that is able to carry out certain complex computations with much greater efficiency than traditional computers. That’s a quick definition of quantum computers, but we’ll want to take some time to really understand what separates quantum computers from traditional computers.

Regular computers encode information with a binary system: representing each bit of the data as either a one or zero. Series of ones and zeroes are chained together to represent complex chunks of information like text, images, and audio. Yet in these binary systems, the information can only ever be stored as ones and zeroes, meaning that there is a hard limit to how data is represented and interpreted and that as data becomes more complex it must necessarily become longer and longer strings of ones and zeroes.

The reason quantum computers are able to more efficiently store and interpret data is because they don’t use bits to represent data, rather they use “qubits”. Qubits are subatomic particles like photons and electrons. Qubits have a couple interesting properties that make them useful for new methods of computation. Qubits have two properties that computer engineers can take advantage of: superpositions and entanglement.

Quantum superpositions allow qubits to exist in not just the “one” state or the “zero” state, but along a continuum between these states, meaning more information can be held using qubits. Meanwhile, quantum entanglement refers to a phenomenon where pairs of qubits can be generated and if one qubit is altered the other qubit is altered, in a predictable fashion, as well. These quantum properties can be used to represent and structure complex data in more efficient ways.

How Quantum Computers Operate

Quantum “superpositions” get their name from the fact that they can be in more than one position at a time. While bits can be in just two positions, qubits can exist in multiple states at once.

Thanks in part to the existence of quantum superpositions, a quantum computer is capable of calculating many different potential outcomes at the same time. Once the calculations are done, the qubits are measured, which creates a final result through the collapse of the quantum state to either 0 or 1, meaning the result can then be interpreted by traditional computers.

Quantum computing researchers and engineers can alter the position the qubits are in by using microwaves or precision lasers.

Computer engineers can take advantage of quantum entanglement to dramatically improve the processing power of computers. Quantum entanglement refers to the fact that two qubits can be linked together in such a way that changing one of the qubits alters the other qubit in a reliable way. It’s not fully understood why qubits can establish such a relationship or how this phenomenon works exactly, but scientists do understand it well enough to potentially take advantage of it for quantum computers. Because of quantum entanglement, the addition of extra qubits to a quantum machine doesn’t just double the processing power of a computer it can scale the processing power exponentially.

If this has all seemed a bit too abstract, we can describe how superpositions are useful by imagining a maze. For a normal computer to attempt to solve a maze, it must try each path of the maze until it finds a successful route. However, a quantum computer could essentially explore all the different paths at once, since it isn’t tied down to any one given state.

All of this is to say that the properties of entanglement and superpositions make quantum computers useful because they can deal with uncertainty, they are capable of exploring more possible states and results. Quantum computers will help scientists and engineers better model and understand situations that are multi-faceted, with many variables.

What Are Quantum Computers Used For?

Now that we have a better intuition for how quantum computers operate, let’s explore the possible use cases for quantum computers.

We’ve already alluded to the fact that quantum computers can be used to carry out traditional computations at a much faster pace. However, quantum computer technology can be used to achieve things that may not even be possible, or are highly impractical, with traditional computers.

One of the most promising and interesting applications of quantum computers is in the field of artificial intelligence. Quantum computers have the power to improve the models created by neural networks, as well as the software that supports them. Google is currently using its quantum computers to assist in the creation of self-driving vehicles.

Quantum computers also have a role to play in the analysis of chemical interactions and reactions. Even the most advanced normal computers can only model reactions between relatively simple molecules, which they achieve by simulating the properties of the molecules in question. Quantum computers, however, allow researchers to create models that have the exact quantum properties as the molecules they are researching. Quicker, more accurate molecule modeling would aid in the creation of new therapeutic drugs and new materials for use in the creation of energy technology, such as more efficient solar panels.

Quantum computers can also be used to better predict weather. Weather is the confluence of many events and the formulas used to predict weather patterns are complicated, containing many variables. It can take an extremely long time to carry out all the calculations needed to predict the weather, during which the weather conditions themselves can evolve. Fortunately, the equations used to predict weather have a wave nature that a quantum computer can exploit. Quantum computers can help researchers build more accurate climate models, which are necessary in a world where the climate is changing.

Quantum computers and algorithms can also be used to help ensure people’s data privacy. Quantum cryptography makes use of the quantum uncertainty principle, where any attempt to measure an object ends up making changes to that object. Attempts to intercept communications would influence the resulting communication and show evidence of tampering.

Looking Ahead

Most of the uses for quantum computers will be confined to academics and businesses. It’s unlikely that consumers/the general public will get quantum smartphones, at least not anytime soon. This is because it requires specialized equipment to operate a quantum computer. Quantum computers are highly sensitive to disturbance, as even the most minute changes in the surrounding environment can cause qubits to shift position and drop out of the superposition state. This is called decoherence, and it’s one of the reasons that advances in quantum computers seem to come so slowly compared to regular computers. Quantum computers typically need to operate in conditions of extreme low temperatures, isolated from other electrical equipment.

Even with all the precautions, noise still manages to create errors in the calculations, and researchers are looking for ways to make qubits more reliable. To achieve quantum supremacy, where a quantum computer fully eclipses the power of a current supercomputer, qubits need to be linked together. A truly quantum supreme computer could require thousands of qubits, but the best quantum computers today can typically only deal with around 50 qubits. Researchers are constantly making in-roads towards creating more stable and reliable qubits. Experts in the field of quantum computers predict that powerful and reliable quantum devices may be here within a decade.

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What Are Nanobots? Understanding Nanobot Structure, Operation, and Uses

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As technology advances, things don’t always become bigger and better, objects also become smaller. In fact, nanotechnology is one of the fastest-growing technological fields, worth over 1 trillion USD, and it’s forecast to grow by approximately 17% over the next half-decade. Nanobots are a major part of the nanotechnology field, but what are they exactly and how do they operate? Let’s take a closer look at nanobots to understand how this transformative technology works and what it’s used for.

What Are Nanobots?

The field of nanotechnology is concerned with the research and development of technology approximately one to 100 nanometres in scale. Therefore, nanorobotics is focused on the creation of robots that are around this size. In practice, it’s difficult to engineer anything as small as one nanometer in scale and the term “nanorobotics” and “nanobot” is frequently applied to devices which are approximately 0.1 – 10 micrometers in size, which is still quite small.

It’s important to note that the term “nanorobot” is sometimes applied to devices which interact with objects at the nanoscale, manipulating nanoscale items. Therefore, even if the device itself is much larger, it may be considered a nanorobotic instrument. This article will focus on nanoscale robots themselves.

Much of the field of nanorobotics and nanobots is still in the theoretical phase, with research focused on solving the problems of construction at such a small scale. However, some prototype nanomachines and nanomotors have been designed and tested.

Most currently existing nanorobotic devices fall into one of four categories: switches, motors, shuttles, and cars.

Nanorobotic switches operate by being prompted to switch from an “off” state to an “on” state. Environmental factors are used to make the machine change shape, a process called conformational change. The environment is altered using processes like chemical reactions, UV light, and temperature, and the nanorobotic switches shift into different forms as a result, able to accomplish specific tasks.

Nanomotors are more complex than simple switches, and they utilize the energy created by the effects of the conformational change in order to move around and affect the molecules in the surrounding environment.

Shuttles are nanorobots that are capable of transporting chemicals like drugs to specific, targeted regions. The goal is to combine shuttles with nanorobot motors so that the shuttles are capable of a greater degree of movement through an environment.

Nanorobotic “cars” are the most advanced nanodevices at the moment, capable of moving independently with prompts from chemical or electromagnetic catalysts. The nanomotors that drive nanorobotic cars need to be controlled in order for the vehicle to be steered, and researchers are experimenting with various methods of nanorobotic control.

Nanorobotics researchers aim to synthesize these different components and technologies into nanomachines that can complete complex tasks, accomplished by swarms of nanobots working together.

Photo: Photo: ” Comparison of the sizes of nanomaterials with those of other common materials.” Sureshup vai Wikimedia Commons, CC BY 3.0 (https://en.wikipedia.org/wiki/File:Comparison_of_nanomaterials_sizes.jpg)

How Are Nanobots Created?

The field of nanorobotics is at the crossroads of many disciplines and the creation of nanobots involves the creation of sensors, actuators and motors. Physical modeling must be done as well, and all of this must be done at nanoscale. As mentioned above, nanomanipulation devices are used to assemble these nano-scale parts and manipulate artificial or biological components, which includes the manipulation of cells and molecules.

Nanorobotics engineers must be able to solve a multitude of problems. They have to address issues regarding sensation, control power, communications, and interactions between both inorganic and organic materials.

The size of a nanobot is roughly comparable to biological cells, and because of this fact future nanobots could be employed in disciplines like medicine and environmental preservation/remediation. Most “nanobots” that exist today are just specific molecules which have been manipulated to accomplish certain tasks. 

Complex nanobots are essentially just simple molecules joined together and manipulated with chemical processes. For instance, some nanobots are comprised of DNA, and they transport molecular cargo.

How Do Nanobots Operate?

Given the still heavily theoretical nature of nanobots, questions about how nanobots operate are answered with predictions rather than statements of fact. It’s likely that the first major uses for nanobots will be in the medical field, moving through the human body and accomplishing tasks like diagnosing diseases, monitoring vitals, and dispensing treatments. These nanobots will need to be able to navigate their way around the human body and move through tissues like blood vessels.

Navigation

In terms of nanobot navigation, there are a variety of techniques that nanobot researchers and engineers are investigating. One method of navigation is the utilization of ultrasonic signals for detection and deployment. A nanobot could emit ultrasonic signals that could be traced to locate the position of the nanobots, and the robots could then be guided to specific areas with the use of a special tool that directs their motion. Magnetic Resonance Imaging (MRI) devices could also be employed to track the position of nanobots, and early experiments with MRIs have demonstrated that the technology can be used to detect and even maneuver nanobots. Other methods of detecting and maneuvring nanobots include the use of X-rays, microwaves and radio-waves. At the moment, our control of these waves at the nano-scale is fairly limited, so new methods of utilizing these waves would have to be invented.

The navigation and detection systems described above are external methods, relying on the use of tools to move the nanobots. With the addition of onboard sensors, the nanobots could be more autonomous. For instance, chemical sensors included onboard nanobots could allow the robot to scan the surrounding environment and follow certain chemical markers to a target region.

Power

When it comes to powering the nanobots, there are also a variety of power solutions being explored by researchers. Solutions for powering nanobots include external power sources and onboard/internal power sources.

Internal power solutions include generators and capacitors. Generators onboard the nanobot could use the electrolytes found within the blood to produce energy, or nanobots could even be powered using the surrounding blood as a chemical catalyst that produces energy when combined with a chemical the nanobot carries with it. Capacitors operate similarly to batteries, storing electrical energy that could be used to propel the nanobot. Other options like tiny nuclear power sources have even been considered.

As far as external power sources go, incredibly small, thin wires could tether the nanobots to an outside power source. Such wires could be made out of miniature fiber optic cables, sending pulses of light down the wires and having the actual electricity be generated within the nanobot.

Other external power solutions include magnetic fields or ultrasonic signals. Nanobots could employ something called a piezoelectric membrane, which is capable of collecting ultrasonic waves and transforming them into electrical power. Magnetic fields can be used to catalyze electrical currents within a closed conducting loop contained onboard the nanobot. As a bonus, the magnetic field could also be used to control the direction of the nanobot.

Locomotion

Addressing the problem of nanobot locomotion requires some inventive solutions. Nanobots that aren’t tethered, or aren’t just free-floating in their environment, need to have some method of moving to their target locations. The propulsion system will need to be powerful and stable, able to propel the nanobot against currents in its surrounding environment, like the flow of the blood. Propulsion solutions under investigation are often inspired by the natural world, with researchers looking at how microscope organisms move through their environment. For instance, microorganisms often use long, whip-like tails called flagella to propel themselves, or they use a number of tiny, hair-like limbs dubbed cilia.

Researchers are also experimenting with giving robots small arm-like appendages that could allow the robot to swim, grip, and crawl. Currently, these appendages are controlled via magnetic fields outside the body, as the magnetic force prompts the robot’s arms to vibrate. An added benefit to this method of locomotion is that the energy for it comes from an outside source. This technology would need to be made even smaller to make it viable for true nanobots.

There are other, more inventive, propulsion strategies also under investigation. For instance, some researchers have proposed using capacitors to engineer an electromagnetic pump that would pull conductive fluids in and shoot it out like a jet, propelling the nanobot forward.

Regardless of the eventual application of nanobots, they must solve the problems described above, handling navigation, locomotion, and power.

What Are Nanobots Used For?

As mentioned, the first uses for nanobots will likely be in the medical field. Nanobots could be used to monitor for damage to the body, and potentially even facilitate the repair of this damage. Future nanobots could deliver medicine directly to the cells that need them. Currently, medicines are delivered orally or intravenously and they spread throughout the body instead of hitting just the target regions, causing side effects. Nanobots equipped with sensors could easily be used to monitor for changes in regions of cells, reporting changes at the first sign of damage or malfunction.

We are still a long way away from these hypothetical applications, but progress is being made all the time. As an example, in 2017 scientists created nanobots that targeted cancer cells and attacked them with a miniaturized drill, killing them. This year, a group of researchers from ITMO University designed a nanobot composed of DNA fragments, capable of destroying pathogenic RNA strands. DNA-based nanobots are also currently capable of transporting molecular cargo, The nanobot is made of three different DNA sections, maneuvering with a DNA “leg” and carrying specific molecules with the use of an “arm”.

Beyond medical applications, research is being done regarding the use of nanobots for the purposes of environmental cleanup and remediation. Nanobots could potentially be used to remove toxic heavy metals and plastics from bodies of water. The nanobots could carry compounds that render toxic substances inert when combined together, or they could be used to degrade plastic waste through similar processes. Research is also being done on the use of nanobots to facilitate the production of extremely small computer chips and processors, essentially using nanobots to produce microscale computer circuits.

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AI 101

What Are Deepfakes?

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As deepfakes become easier to make and more prolific, more attention is paid to them. Deepfakes have become the focal point of discussions involving AI ethics, misinformation, openness of information and the internet, and regulation. It pays to be informed regarding deepfakes, and to have an intuitive understanding of what deepfakes are. This article will clarify the definition of a deepfake, examine their use cases, discuss how deepfakes can be detected, and examine the implications of deepfakes for society.

What Is A Deepfakes?

Before going on to discuss deepfakes further, it would be helpful to take some time and clarify what “deepfakes” actually are. There is a substantial amount of confusion regarding the term Deepfake, and often the term is misapplied to any falsified media, regardless of whether or not it is a genuine deepfake. In order to qualify as a Deepfake, the faked media in question must be generated with a machine-learning system, specifically a deep neural network.

The key ingredient of deepfakes is machine learning. Machine learning has made it possible for computers to automatically generate video and audio relatively quickly and easily. Deep neural networks are trained on footage of a real person in order for the network to learn how people look and move under the target environmental conditions. The trained network is then used on images of another individual and augmented with additional computer graphics techniques in order to combine the new person with the original footage. An encoder algorithm is used to determine the similarities between the original face and the target face. Once the common features of the faces have been isolated, a second AI algorithm called a decoder is used. The decoder examines the encoded (compressed) images and reconstructs them based off on the features in the original images. Two decoders are used, one on the original subject’s face and the second on the target person’s face. In order for the swap to be made, the decoder trained on images of person X is fed images of person Y. The result is that person Y’s face is reconstruction over Person X’s facial expressions and orientation.

Currently, it still takes a fair amount of time for a deepfake to be made. The creator of the fake has to spend a long time manually adjusting parameters of the model, as suboptimal parameters will lead to noticeable imperfections and image glitches that give away the fake’s true nature.

Although it’s frequently assumed that most deepfakes are made with a type of neural network called a generative adversarial network (GAN), many (perhaps most) deepfakes created these days do not rely on GANs. While GANs did play a prominent role in the creation of early deepfakes,  most deepfake videos are created through alternative methods, according to Siwei Lyu from SUNY Buffalo.

It takes a disproportionately large amount of training data in order to train a GAN, and GANs often take much longer to render an image compared to other image generation techniques. GANs are also better for generating static images than video, as GANs have difficulties maintaining consistencies from frame to frame. It’s much more common to use an encoder and multiple decoders to create deepfakes.

What Are Deepfakes Used For?

Many of the deepfakes found online are pornographic in nature. According to research done by Deeptrace, an AI firm, out of a sample of approximately 15,000 deepfake videos taken in September of 2019, approximately 95% of them were pornographic in nature. A troubling implication of this fact is that as the technology becomes easier to use, incidents of fake revenge porn could rise.

However, not all deep fakes are pornographic in nature. There are more legitimate uses for deepfake technology. Audio deepfake technology could help people broadcast their regular voices after they are damaged or lost due to illness or injury. Deepfakes can also be used for hiding the faces of people who are in sensitive, potentially dangerous situations, while still allowing their lips and expressions to be read. Deepfake technology can potentially be used to improve the dubbing on foreign-language films, aid in the repair of old and damaged media, and even create new styles of art.

Non-Video Deepfakes

While most people think of fake videos when they hear the term “deepfake”, fake videos are by no means the only kind of fake media produced with deepfake technology. Deepfake technology is used to create photo and audio fakes as well. As previously mentioned, GANs are frequently used to generate fake images. It’s thought that there have been many cases of fake LinkedIn and Facebook profiles that have profile images generated with deepfake algorithms.

It’s possible to create audio deepfakes as well. Deep neural networks are trained to produce voice clones/voice skins of different people, including celebrities and politicians. One famous example of an audio Deepfake is when the AI company Dessa made use of an AI model, supported by non-AI algorithms, to recreate the voice of the podcast host Joe Rogan.

How To Spot Deepfakes

As deepfakes become more and more sophisticated, distinguishing them from genuine media will become tougher and tougher. Currently, there are a few telltale signs people can look for to ascertain if a video is potentially a deepfake, like poor lip-syncing, unnatural movement, flickering around the edge of the face, and warping of fine details like hair, teeth, or reflections. Other potential signs of a deepfake include lower-quality parts of the same video, and irregular blinking of the eyes.

While these signs may help one spot a deepfake at the moment, as deepfake technology improves the only option for reliable deepfake detection might be other types of AI trained to distinguish fakes from real media.

Artificial intelligence companies, including many of the large tech companies, are researching methods of detecting deepfakes. Last December, a deepfake detection challenge was started, supported by three tech giants: Amazon, Facebook, and Microsoft. Research teams from around the world worked on methods of detecting deepfakes, competing to develop the best detection methods. Other groups of researchers, like a group of combined researchers from Google and Jigsaw, are working on a type of “face forensics” that can detect videos that have been altered, making their datasets open source and encouraging others to develop deepfake detection methods. The aforementioned Dessa has worked on refining deepfake detection techniques, trying to ensure that the detection models work on deepfake videos found in the wild (out on the internet) rather than just on pre-composed training and testing datasets, like the open-source dataset Google provided.

There are also other strategies that are being investigated to deal with the proliferation of deepfakes. For instance, checking videos for concordance with other sources of information is one strategy. Searches can be done for video of events potentially taken from other angles, or background details of the video (like weather patterns and locations) can be checked for incongruities. Beyond this, a Blockchain online ledger system could register videos when they are initially created, holding their original audio and images so that derivative videos can always be checked for manipulation.

Ultimately, it’s important that reliable methods of detecting deepfakes are created and that these detection methods keep up with the newest advances in deepfake technology. While it is hard to know exactly what the effects of deepfakes will be, if there are not reliable methods of detecting deepfakes (and other forms of fake media), misinformation could potentially run rampant and degrade people’s trust in society and institutions.

Implications of Deepfakes

What are the dangers of allowing deep fake to proliferate unchecked?

One of the biggest problems that deepfakes create currently is nonconsensual pornography, engineered by combining people’s faces with pornographic videos and images. AI ethicists are worried that deepfakes will see more use in the creation of fake revenge porn. Beyond this, deepfakes could be used to bully and damage the reputation of just about anyone, as they could be used to place people into controversial and compromising scenarios.

Companies and cybersecurity specialists have expressed concern about the use of deepfakes to facilitate scams, fraud, and extortion. Allegedly, deepfake audio has been used to convince employees of a company to transfer money to scammers

It’s possible that deepfakes could have harmful effects even beyond those listed above. Deepfakes could potentially erode people’s trust in media generally, and make it difficult for people to distinguish between real news and fake news. If many videos on the web are fake, it becomes easier for governments, companies, and other entities to cast doubt on legitimate controversies and unethical practices.

When it comes to governments, deepfakes may even pose threats to the operation of democracy. Democracy requires that citizens are able to make informed decisions about politicians based on reliable information. Misinformation undermines democratic processes. For example, the president of Gabon, Ali Bongo, appeared in a video attempting to reassure the Gabon citizenry. The president was assumed to be unwell for long a long period of time, and his sudden appearance in a likely fake video kicked off an attempted coup. President Donald Trump claimed that an audio recording of him bragging about grabbing women by the genitals was fake, despite also describing it as “locker room talk”. Prince Andrew also claimed that an image provided by Emily Maitilis’ attorney was fake, though the attorney insisted on its authenticity.

Ultimately, while there are legitimate uses for deepfake technology, there are many potential harms that can arise from the misuse of that technology. For that reason, it’s extremely important that methods to determine the authenticity of media be created and maintained.

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