Journal of Digital Image Processing and Computer Vision

Authors: P.Nagaraju, Dr.A.Subramanyam 

Abstract: Future high resolution instruments planned by ISRO for space remote sensing will have higher data rates as a result of planned improvements in resolution and dynamic range. Limited transmission capability mandates higher compression ratio for such missions. Differential Pulse Code Modulation (DPCM) is prediction based image compression technique (10:7) successfully used in Resourcesat-2 mission. An effort has been made to develop low complex image compression techniques with higher compression ratio while maintaining similar/better radiometric performance. Adaptive DPCM (ADPCM) is another prediction based image compression technique, which has been used by other space agencies with proprietary algorithms. Custom ADPCM techniques with multiple quantizers are developed with compression ratio of 10:6 and 10:5. Developed low complex ADPCM techniques are unique w.r.t. predictor selection. Developed techniques are evaluated for both low and high contrast images.