1. A method comprising: receiving video data from a camera on a wearable computing device, wherein a real-world field of view corresponds to the wearable computing device; based on the video data, detecting a movement of a pointing device within the real-world field of view; determining that the movement of the pointing device defines at least a portion of an outline of an area in the video data; identifying a portion of the video data that represents a real-world object and is substantially located in the determined area; and initiating a visual search on the portion of the video data that represents the real-world object.