Novel Image Watermarking Technique Based on Adjacent Pixel Position Switch

Image watermarking is the technology of hiding data into digital media for intellectual property protection. We proposed robust technique for watermarking digital images namely Adjacent Pixel Position Switch (APPS). The idea of APPS is to slightly change the position of the pixel without affecting the overall shape of the image. If we draw line by computer and changed slightly the position of one pixel of the line, the overall shape of the line will not be affected; the change will not be noticed by Human Visual System. In APPS the image is divided into 2x2 non-overlapping blocks, one bit is embedded in each block. Embedding is done by switching the position of pair of pixels in each block. APPS is our novel idea, not previously explored. APPS watermarking results showed that the watermark can be embedded without affecting the quality of the image, the algorithm is efficiently used in document forgery detection, and in addition the proposed approach is robust to almost all attacks.