| In recent years, as the development of computing, the requirements of graph processing are magnified constantly. Substantially, image encoding and compression used to deal with the initial image data based on certain regular, so that we can use the code as possible as little to express the same data information. JPEG (Joint Photographic Experts GROUP) is the first international digital image compression standard by international standard organization and international telegrah consult committee established, and at present the ratio is the highest of the compression in all static images.Due to high compression ratio, JPEG is currently being widely applied in the multimedia and network applications. Based on this objective, the design of the task is to study and implement JPEG compression coding, namely through vc + + design realize image compression for JPEG formats of function, and finally, the algorithm applied in actual system, and the application results are analyzed to show the effectiveness and algorithmic compression of actual application meaning.This paper firstly for the image coding compression related knowledge background were further elaboration, introduces several common image coding algorithm, and convection image file formats did are introduced, and the design principle for the subject to provide the necessary theoretical basis. Then a concrete analysis JPEG image compression method, to JPEG compression coding algorithm briefly introduce, then introduces in detail JPEG compression algorithm coded design procedure. Then expounds the actual realization JPEG compression coding method, this paper introduces the development environment, has been used in JPEG decoding program detailed implementation. Final detail the JPEG compression in the actual system, this paper expounds the application JPEG lossy compression coding method in building monitoring system and pipeline monitoring systems, in these two systems, involve a great deal of image processing, image compression processing of these is necessary to, also is the meaning of this study. |
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