Remote sensing image near-lossless compression hardware realization method based on improved JPEG-LS algorithm
A technology of hardware implementation and remote sensing image, which is applied in image communication, electrical components, digital video signal modification, etc. It can solve the problems of long critical path, affecting system running speed, and unguaranteed calculation accuracy, etc., and achieves less critical path delay and efficient It is beneficial to the system operation speed and the obvious effect of speed advantage
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[0032] like figure 1As shown, it is a flow chart of the method for implementing the remote sensing image compression hardware based on the improved JPEG-LS of the present invention. First, the pixel reconstruction value of the input image is directly calculated by the actual pixel value of the input image, and then the context variable Q is calculated according to the obtained pixel reconstruction value. If Q is equal to 0, run-length coding is performed, otherwise, conventional coding is performed. When performing conventional encoding, firstly, according to the geometric position relationship between the current pixel and its adjacent pixels, the predicted value of the current pixel is calculated by using the obtained pixel reconstruction value, and then the residual value between the predicted value and the actual value of the current pixel is calculated, and then the Quantization processing is performed on the obtained residual value, Golomb encoding is performed on the qu...
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