Google has patented an algorithm which recognizes the facial expression of the user after he get the search results. The engineers of the company are expecting to use the frontal camera and sensors of the mobile device to measure the body temperature and hearth rhythm of the user, as well as register the movement of the pupils and facial micro expressions.
After such an analysis, the company plans to understand how satisfied the user is with the search result and according to that, adjust the further results on the mobile gadgets.