Image intelligent mode recognition and searching method
A search method and intelligent mode technology, applied in character and pattern recognition, special data processing applications, instruments, etc., can solve the problems of huge amount of information, difficult to achieve, unsatisfactory retrieval results, etc., to reduce response time, improve hit effect
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[0007] In order to save storage space and improve transmission efficiency, images on the Internet generally use compressed JPEG, GIF, TIFF and other formats, and generally do not use BMP format. JPEG format is currently the most widely used on the Internet. JPEG (Joint Photographic Experts Group) is the first international digital image compression standard jointly developed by ISO, CCITT, and IEC for continuous tone still images. Two systems with different performances are defined in the JPEG standard: basic system and extended system. The basic system divides the image into several 8×8 squares, and performs DCT transformation on each square. The DC coefficients after quantization are coded by one-dimensional DPCM, and the AC coefficients are coded by run-length after Z-scanning. Finally, the Huffman coding method is used to reduce redundancy for the output of DPCM and run-length coding, and the decoder only stores two Huffman tables. The extended system can provide a layere...
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