1. A method, comprising: modifying values of image data of a first image of an object, the first image taken by a user using a user equipment, the modifying performed to map at least one color characteristic of at least one color component of the user equipment to a corresponding at least one color characteristic for the at least one color component of a reference device, the modifying creating a modified image; and on the user equipment, performing comparisons between the modified image and a plurality of second images of objects taken by the reference device.