Visual Cryptography Techniques-A survey & Comparison [ ]

Image Processing is a technique of processing the images such that the visibility of images is clear to user. Some times in image processing security is an important concern and also used for the hiding of information in images. Visual cryptography is a special technique of encryption for the information hiding in images such that the image is visible only applying correct key to the image for decryption. Although there are various techniques implemented for the visual cryptography, but here a survey of all the technique and their various analysis is done here so that on the basis of their advantages and limitations a new and efficient technique is implemented in future.