Stationary picture compression technology
analysis and application of JPEG
Modern society has entered a high-speed information time. The informationization development has driven the computer and the multimedia technical unceasing development,.In order to satisfy the visual communication and the image storage demand,The people expected has a unification the highly effective image compression standard appearance. Static images, often used as a computer graphic form but also dynamic images based its compression technology is a very important work, JPEG standard is in this context came into being, JPEG compression technology is very advanced, it used compressed manner detrimental to remove redundant image data. access to high compression rates will be displayed at the same time very rich vivid images, and JPEG is a very flexible format, with the functional-image quality, allowing a different compression ratio of document compression, support multiple compression levels, the greater the compression ratio, the lower the quality; On the contrary, smaller than compressed, the better the quality.
Not only the image data compression is necessary, moreover also is possible, because the image data has the massive redundant informations, achieves the compression through the elimination redundancy the goal, thus solution image data quantity huge and inconvenient memory and transmission question. This article is embarks from the image compression necessity and the possibility, introduced first the image compression method classification, several image compression method which involved in static state image compression JPEG has then carried on the introduction to several kinds .Then the concrete elaboration JPEG code process, and proposed one kind of improvement separate cosine transformation in this foundation. Finally introduced the JPEG standard color system and its document format, simultaneously carry on the recording and the analysis to the experimental result，and has carried on the forecast to the stationary picture compression new technical prospect.
The this article stationary picture compresses JPEG finally to use the VB language to realize.
Key words: Image Compression ，Jpeg ，Dct