Visual Cryptography of Animated GIF Image Based on XOR Operation

Abstract

This paper describes application of a secret colour image sharing scheme based on XOR operation to the animated GIF images. The scheme is performed without expanding every pixel in the secret image so that size of shared images are equal to size of the secret images. Originally the scheme supports RGB images. In this paper we apply the scheme to the animated GIF image. A GIF image consists of a color palette and a matrix which entries (pixel values) refer to the palette row. XOR operation is not performed to RGB palette of GIF image, but to the matrix. The scheme is applied to each frame of the animated GIF image. As a result, each participant has his (or her) own share, each share is an animated GIF image where the frames look like the random images. The experiment shows that the scheme could be applied to the animated GIF image well. The original animated GIF image could be reconstructed exactly.