There is provided an image processing apparatus including an image reception unit configured to receive an image with markers including a sub image and marker pixels each indicating, using a pixel value, a combining ratio of a main image and the sub image that is combined with the main image, a combining ratio acquisition unit configured to acquire the combining ratio indicated by a pixel value of the marker pixel in the image with markers, and a combining unit configured to combine the main image and the sub image based on the acquired combining ratio.