Abstract: The present invention relates to an apparatus for compressing and decompressing the digital image data designed for minimizing degradation of the image quality and for improving the compression efficiency. Discriminative over the conventional package quantization method based on the statistical characteristics of an image, the invention is configured such that the image is firstly segmented into predetermined number of sub-blocks by the block segmentator, and each divided blocks are adopted by the different compression technique in accordance with the shape or complicity of the image.

Abstract: There is disclosed an image processing apparatus for emphasizing edge components of an image signal to be provided from an image input system.

Abstract: An image processing apparatus extracts a local image from an original image which is supplied by an image input unit, the local image corresponding to a local area, designated by a coordinate data input unit, and being supplied to an image output unit. The apparatus extracts local image data by using coordinate data associated with boundary pixels positioned in boundary lines between the local image and other parts of the original image. The extracted local image data are then provided to the image output unit in accordance with horizontal and vertical synchronizing signals applied from a generator.