1. A computer-readable storage device encoded with executable code and a processed image, the processed image comprising an irregularly-shaped modified blotch, the modified blotch having color that is similar to, but different from, color of a neighboring area, such that the difference defines a border between the modified blotch and the neighboring area, wherein the executable code includes instructions that, when executed by a processor, cause the processor to perform operations comprising enabling display of the processed image, and wherein the processed image is encoded on the computer-readable storage device by: accessing a first image comprising a blotch; processing the first image including the blotch to generate a second image, the second image comprising the irregularly-shaped modified blotch, the modified blotch having color that is similar to, but different from, color of the neighboring area, such that the difference defines a border between the modified blotch and the neighboring area; and storing the second image on the computer-readable storage device as the processed image.