Visual Secret Sharing of Color Image Using Extended Asmuth Bloom Technique

Secret image sharing is the technique for securing images that involves the distribution of secret image into several shadow images. Secret sharing for color image is proposed in this article using Asmuth bloom technique which is further extended for accurate reconstruction of given original image. The secret image is reduced in pixel value using a quantization factor resulting in quantized secret image and a difference image. Secret shares based on Asmuth Bloom scheme are generated from the quantized secrets and are distributed among n participants specified at least t of them should gather to reveal the difference secret image and therefore the respective quantized image. The original secret is reconstructed using the inverse quantization process.