Described herein is a technology that facilitates learning interests for advertising based on automated analysis of images. In several embodiments a person's interests are automatically learned based on the person's photographs for targeted advertising. Techniques are described that facilitate automatically detecting a user's interest from images and suggesting user-targeted ads. As described herein, these techniques include computer-annotating images with learned tags, performing topic learning to obtain an interest model, and performing advertisement matching and ranking based on the interest model.