Doug Sillars discusses using AI to optimize images for the web. He notes that images dominate web content and presents techniques like automatic cropping, object detection for cropping or blurring parts of images, and using machine learning to generate alt text for images. Sillars demonstrates applying these techniques to sample images, such as automatically adding sunglasses. He concludes that image processing with AI and ML can simplify tasks like image cropping, redaction, and accessibility.