11. A system comprising: one or more computer processors and storage configured to: receive from a client machine an image query for a desired product that is listed for sale; compute a first digest of the image query; determine, based on the first digest, textual information that describes the desired product; by use of determined textual information as a search parameter, perform a first database textual similarity search of second digests of products listed for sale, the second digests being computed before receipt of the query from the client machine, and comprising both image features and textual information of the products, to find first images of products that satisfy the search parameter; provide to the client machine a plurality of the first images of products that result from the first database textual similarity search, and at least one first selectable icon that, when selected, causes a request to find more images of products similar to at least one of the plurality of first images of products; responsive to selection of one of the at least one first selectable icon, by use of the textual information related to the at least one of the plurality of first images of products, perform a second database textual similarity search of the second digests for second images of products similar to the at least one of the plurality of first images of products; and provide to the client machine a plurality of the second images of products that result from the second database textual similarity search.
12. The system of claim 11 wherein the textual information is one of text information specified by a seller of the product or textual information generated by an ecommerce system.