Applications of GANs in Image and Video Generation
Generative adversarial networks (GANs) are a form of artificial intelligence (AI) that fall under unsupervised machine learning. They were originally developed in 2014 by Ian Goodfellow and have made a significant impact on generative AI, using two neural networks - the generator and discriminator - to produce outputs that are deemed suitable by the model. Over time, these two networks become more adept and produce results that outperform each other to create more accurate results.
With its ability to generate increasingly better outputs, GANs have become a powerful tool in AI. They possess the ability to create convincing images and videos, leading to more intricate game design and video editing, and are integral to virtual and augmented reality applications. However, with the ability to create convincing imagery, GANs are also the center of concern with the rise of deepfakes and other deceptive outputs created by AI.
Basics of GANs
GANs can be easily compared to a game between the generator and discriminator. It begins with the generator creating an image or video based on its training data and other inputs that is then judged by the discriminator to be AI-generated or not. This competition forces each neural network to outperform the other, causing both to improve their own abilities.
Training begins by initializing both networks with random weights. The generator will then produce a batch of fake data for the discriminator, which is trained on a mix of real and fake data. The discriminator will then label data as either being real or fake, causing the losing network to improve its performance for the next round until outputs can no longer be considered fake.
Image Generation with GANs
GANs have revolutionized the field of image generation in AI, leveraging Deep Learning to create imagery that is convincing to the human eye. With generative AI’s sudden explosion in popularity at the end of 2022, these advanced AI models are reenvisioning the tools used by creatives in all fields.
Deepfake Technology: Deep Fakes, a reference to Deep Learning and the term fake, is an audiovisual creation that outputs images that do not exist in the real world. This can include human faces or well-known people in situations that never occurred. While this technology poses a lot of interesting potential for stock photography and marketing, its ability to be misused by bad actors has become a serious concern, most notably in politics and cybercrime.
Art Creation: GANs create unique visual patterns and designs that artists might not consider when creating. This new fold to the creative process is creating immense debate in the art world about the authenticity of art, however GANs are pushing the realms of collaboration between man and machine for marketing material and business creatives.
Game Environment Design: GANs are pushing the boundaries of video game design, helping to auto-generate textures, landscapes, and 3D models without requiring game developers to fill in every pixel manually. This can create more rich and immersive experiences and reduces the cost and time necessary for games to be developed.
Video Generation with GANs
Static images aren’t the only material that GANs can help generate. Video generation is another powerful resource that GANs can tap into, helping to speed up the editing process for films and other complex moving imagery.
Film and Animation: Computer animation has come a long way in Hollywood. CGI, or computer-generated imagery, is used in some of Hollywood’s most popular films like the Marvel superhero series. However, GANs are creating new potential for CGI. Dramas like The Irishman and Blade Runner 2049 both use AI to superpose different faces onto actors.
Video Enhancement: Pattern recognition can help GANs improve old or damaged film, upscaling grainy film to 4k or even 8k resolution. They are also able to add color to black and white film, bringing new life to some of the oldest videos ever captured and giving us a more interesting glimpse into the past.
Virtual Reality (VR) and Augmented Reality (AR): Similar to game development enhancements, GANs can also fill out entire virtual worlds with self-generated objects and models that humans can interact with in a virtual 3D setting. This new, immersive capability has the potential to create new ways for humans to interact with each other online in personalized environments.
Challenges and Limitations
As mentioned before, deepfakes pose serious concerns for humanity. With the ability to create fake images that are impossible to distinguish from reality, we are opening up a new realm of possibilities for character defamation and abject lies that will be difficult to fight against.
This carries dire consequences as deepfakes can be used to harbor negative opinions and escalate tension between political leaders both within a nation and internationally. War, as bad as it is, is an unavoidable aspect of human nature, and presenting false images to certain demographics could light more powder kegs than we are able to extinguish.
However, many challenges also exist on smaller, more relatable scales as well. Cybercriminals have the same amount of access to GAN technology, and with the right know-how, can be used to develop new, powerful scams that can convince people to give away their private information such as social security numbers and banking information.
Some suggestions to avoid these dilemmas have included watermarking AI-generated content so that it is easily identifiable, giving the public confidence in knowing whether the material they are observing is real or not. However, more severe penalties for unlicensed AI products have also been suggested to prevent black hat hackers from using commercially available AI for illegal reasons.
Future Directions
GAN models are expected to scale as computer technology continues to improve, creating more high-resolution images and videos in real time that can be used for social media, gaming, and many other applications. This boom in content generation has the potential to maximize marketing efficiency and boost creativity for content creators on platforms like YouTube and TikTok where high-quality visuals are essential.
Despite the underlying fears of deepfakes, there are numerous ways that GANs can be used to our benefit and new emerging technology like quantum computing could help improve the time it takes to generate AI content to a near instant degree.
