pixolu is a prototype of an image search system combining keyword search with visual similarity search and semi-automatically learned inter-image relationships. Enter a search term and pixolu searches the image indexes of Yahoo and Flickr. Compared to other image search systems pixolu retrieves more images in an initial phase. Due to a visually sorted display up to several hundred images can be easily inspected, which in most cases is sufficient to get good representations of the entire result set. The user can quickly identify images, which are good candidates for his/her desired search result.In the next step the selected candidate images are used to refine the result by filtering out visually non-similar images from an even larger result set. In addition pixolu learns the inter-image relationships from the candidate sets of different users. This helps pixolu to suggest other images that are semantically similar to the candidate images.