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Joint Photographic Experts Group
JPEG – is a popular graphic format, which is characterized by a high degree of compression, which leads to a decrease in image quality. It uses the technology of encoding of smooth color renditions, providing the ability to reduce the amount of data frequently during the recording of the image. Because of the small size it is requested by the owners of websites, allowing you to save the traffic effectively. It is also frequently used in memory cards of digital video cameras. The JPEG algorithm is optimally suitable for compressing photographs and pictures, in which realistic scenes with little contrast of colors are present. It is not recommended to use this format for compression of drawings and various kinds of graphics, since a strong contrast between a number of closely located pixels provokes the appearance of visible artifacts.
The procedure for compressing the digital images in JPEG format is carried out in several stages. First, the photo is transformed into a color space YCbCr, then it is divided into squares to determine the upper range of the color spectrum. Finally, the colors and brightness are coded. JPEG uses a "lossy" compression system and discrete cosine transform technology. The format acts simultaneously as the standard of ISO and the International Telecommunication Union. The file compression ratio is in the range from 10:1 to 100:1. In this case, the reduction in image quality can vary from insignificant to substantial.
Corel Paint Shop Pro
The JPEG Committee
arw 于 jpeg bmp 于 jpeg cgm 于 jpeg cr2 于 jpeg crw 于 jpeg cur 于 jpeg dcm 于 jpeg dcr 于 jpeg dng 于 jpeg emf 于 jpeg fax 于 jpeg gif 于 jpeg hdr 于 jpeg ico 于 jpeg nef 于 jpeg orf 于 jpeg pbm 于 jpeg pgm 于 jpeg pict 于 jpeg png 于 jpeg pnm 于 jpeg psd 于 jpeg pwp 于 jpeg raf 于 jpeg sfw 于 jpeg svg 于 jpeg tga 于 jpeg tiff 于 jpeg tim 于 jpeg wpg 于 jpeg xcf 于 jpeg xwd 于 jpeg html 于 jpeg pdf 于 jpeg dxf 于 jpeg eps 于 jpeg pcd 于 jpeg pct 于 jpeg wmf 于 jpeg jpg 于 jpeg