Generation of Hybrid Images Using Mosaicking and Dithering

A simple method is presented for generating a hybrid image which is perceived as one image when seen up-close while another image is visible from far away. We generate a far-away image by decomposing one image into blocks and quantizing it with an error diffusion dither. An up-close image is produced from another image by subtracting its mosaicking image from it. A hybrid image is generated by addition of far-away image and up-close one. We experimentally verified that our method is simpler than the method of Oliva et al. and gives a hybrid image with higher separability between two images.