1. A method, comprising: receiving, by at least one of one or more server devices and from a client, a search query; obtaining, by at least one of the one or more server devices, search results based on the search query, the search results identifying documents relevant to the search query; identifying, by at least one of the one or more server devices, image attributes associated with one or more of the documents, the image attributes identifying information, within the one or more of the documents, associated with images; obtaining, by at least one of the one or more server devices, classification metrics that include information for determining a measure of image intent associated with the search query, the measure of image intent representing a likelihood that image results are intended by the search query, the image results identifying images or video relevant to the search query, and the classification metrics identifying a plurality of keywords; determining, by at least one of the one or more server devices, the measure of image intent, associated with the search query, based on the image attributes and the classification metrics, the image attributes, for a particular document of the one or more of the documents, corresponding to at least one of: a particular quantity of keywords, within the particular document, that match the plurality of keywords identified by the classification metrics, or a particular keyword density based on the particular quantity of keywords and a quantity of text within the particular document; determining, by the at least one of the one or more server devices, whether the measure of image intent satisfies a threshold, the threshold being identified by the classification metrics; generating, by at least one of the one or more server devices, a search results document that selectively includes the image results or the search results based on whether the measure of image intent satisfies the threshold; and providing, to the client, the search results document.