Hardware implementation and testing of effective DPCM image compression technique using multiple-LUT

Of the various onboard data compression techniques used in image processing, DPCM is one of the most commonly used. This paper presents a variant of DPCM based image compression technique called DPCM-ML. DPCM-ML is an effective technique for compressing images with high degree of contrast. This paper explains the DPCM-ML technique and the implementation methodology used. For the hardware implementation, an algorithm for DPCM-ML technique is designed. Various test data were generated during simulation to verify the developed code prior to implementation on hardware. The hardware functionality was verified with same test data used during simulation and also an image file was fed to the hardware from PC and the compressed data was acquired. Reverse algorithm was developed in PC to reconstruct the image from compressed data, so that the comparison could be done between real image and reconstructed image.