Shape-based search of a collection of content

A non-transitory computer-readable storage medium storing instructions that, when executed by at least one processor, cause a computing device to:

• provide for display a plurality of refinement shapes configured to represent different types of shapes of a particular item available for selection by a user;
• cause a training image to be associated with at least one of the plurality of refinement shapes based at least in part on similarities between the refinement shape and a shape of an item in the training image;
• cause a first contour histogram descriptor of the training image to be determined;
• receive an image of an inventory item;
• cause a second contour histogram descriptor of the image of the inventory item to be determined;
• cause the image of the inventory item to be associated with the refinement shape based at least in part on similarities between the second contour histogram descriptor of the image and the first contour histogram descriptor of the training image;
• receive a search request including information associated with the at least one of the plurality of refinement shapes;
• and
• provide search results associated with the inventory item.

A computing device, comprising:

• a processor;
• and
• memory including instructions that, when executed by the processor, cause the computing device to:
• provide for display a plurality of refinement shapes configured to represent different types of shapes of a particular item available for selection by a user;
• cause a plurality of images of inventory items to be associated with at least one of the plurality of refinement shapes based at least in part on similarities between a first plurality of contour histogram descriptors associated with the refinement shapes and a second plurality of contour histogram descriptors associated with the inventory items;
• receive information for a search request specifying at least one of the refinement shapes;
• and
• provide search results including at least a reference to at least one of the images of the inventory items associated with the at least one of the refinement shapes specified in the search request.