1. A method performed by a system of one or more computers for selecting image content, the method comprising: performing image analysis on a collection of image content items to obtain information about each image content item, including one or more of(i) determination of one or more objects in individual image content item, (ii) determination of a signature value for each determined object; detecting content that is to be used for image selection; providing, to a user, one or more image selection results from the collection of image content items using the detected content and the information obtained from the image analysis; receiving, from the user, feedback on a first image selection result, the feedback referring to first image content of the first image selection result; and providing, to the user, one or more additional image selection results using the detected content, the information obtained from the image analysis, and the feedback on the first image selection result; wherein receiving feedback on a first image selection result comprises: causing a slider user interface element to be displayed with the first image content; and receiving, as a result of the user interacting with the slider, a specified change to a shape, color, pattern, or style within the first image content.