1. A method comprising: accessing a region of an image, the region including a plurality of pixels; selecting one or more wavelengths; selecting one or more associated phases for the one or more wavelengths; constructing a digital image registration pattern by applying a function to the one or more wavelengths and the one or more associated phases for the one or more wavelengths, the digital image registration pattern including a plurality of pattern values; altering at least one pixel variable value of the plurality of pixels by at least one of the pattern values obtained from the digital image registration pattern; accessing an encoding region of the image; accessing a comparison region of a comparison image; taking an average pixel variable value of one or more subregions of the encoding region and the comparison region to obtain a comparison region average and an encoding region average for the one or more subregions; and adding a difference between the comparison region average for a pixel variable and the encoding region average to pixel values for a plurality of subregion pixels of a particular subregion of the one or more subregions to create a prepared region.