Wavelet image encoder using modified Simple Bit-plane with Run-length coding and Golomb coding

The Hybrid encoder is trying to choose the better encoder between the Wavelet Difference Reduction (Type-W) and Simple Bit-plane (Type-B) to get the better results than pure Type-W or pure Type-B was proposed in previous research. In case that the most pixels are insignificant, Type-B will generate a long consecutive sequence of zero bits. By experimental results, the Modified Simple Bit-plane which is the combination of Run-length encoding and Golomb encoding (Type-G) can improve the efficiency of the output bits sequence. The New Hybrid encoder which automatically chooses one of encoding type from the Type-W, Type-B and Type-G in each bit-plane of each subband should get the better results than the previously proposed Hybrid algorithm in each bit-plane of each subband. The proposed coder is evaluated for the performance in this paper.