1. A non-transitory computer readable medium that stores an image processing program to be executed by a computer to perform: obtaining a first image; obtaining a second image; specifying a partial image of the second image that is based on a sensitivity which is collated with the partial image of the second image, the sensitivity being a value which shows how easy a change is, and changing the specified partial image in accordance with a signal; and a procedure for processing the first image using the changed second image.