DALL·E 2 is a system able to generate images based on descriptions such as "a bird flying over a mountain, with a city on the background, in a pop-art style"
This tool also includes different AI-driven techniques for editing the generated images (Image-to-Image), such as erasing part of an image and generate different content at that point (Image inpainting), or expanding the image on the sides:
Erasing a part of an image to generate new content
Imagining how the picture "continues"
Image to image is the task of transforming a source image to match the characteristics of a target image or a target image domain. Any image manipulation and enhancement is possible with image to image models.
Midjourney is a new research lab focused on new mediums and tools for empowering people. Its Discord bot allows for generating images based on prompts, very similar to DALL·E 2.