A Hybrid 2-3-3 Bits-Based Image Encoding Scheme

In this paper, we present a hybrid 2-3-3 bits based encoding scheme for gray scale images. In this scheme, the gray scale image is converted to its equivalent 8-binary maps. We employ our lossless block coding technique along with a two-dimensional information preserving skip-line routine on the two most significant binary maps. Then, we apply our lossy block coding technique along with a lossy skip-line routine to the next three binary maps. Finally, the three least significant binary maps are set to zero. We tested this scheme on a large set of images of different sizes and applications. The simulation results show that the proposed scheme outperformed the standard JPEG compression in most of the cases while maintained high SNR values