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1、盘点图形图像文件扩展名（Check the graphic image file extension）Check the graphic image file extension2005-03-01 Author: Source: Click: 468Check the graphic image file extensionGraphic image files can be roughly divided into two broad categories: one is bitmap files, and the other is called description classes,
2、vector classes or object oriented graphic image files. The former describes graphic images in the form of lattices, and the latter is a graphical image of geometric elements described in mathematical terms. Generally speaking, the latter is meticulous and true to the image representation, and the re
3、solution of the zoomed image is invariable. It is used more in the graphic processing of the professional level.1, bitmap graphics file*.bmp (Bitmap)*.bmp is the standard image file format in Windows, and has become the De De industrial standard in PC Windows system. There are two forms of compressi
4、on and no compression. It describes the bitmap from the device independent, and can store the image data in uncompressed format. The decoding speed is fast, and it supports the storage of multiple images. The common P C graphics software can process it. In PhotoShop, BMP images can be rendered up to
5、 16M colors at most.*.dib (Device, Independent, Bitmap)*.dib is a graphics file format similar to *.bmp. The ability to describe images is basically the same as that of *.bmp, and can run on a variety of hardware platforms, but larger files. A variety of common P, C graphics, image software can hand
6、le it.*.gif (Graphics, Interchange, Format)*.gif is a compressed graphics file format that can be processed on a variety of graphics processing software on various platforms. It is a standard bitmap format for porting between Macintosh, Amiga, Atati, and IBM machines. The format was created by Compu
7、server, which stores only 256 colors. In color, depth, and image size, *.gif is similar to *.pcx; in structure, *.gif is similar to *.tiff. Because it is compressed image file format, so mostly used in network transmission, speed than the transmission of other image file format much faster. The bigg
8、est drawback is that it can only have a maximum of 256 colors, it can not be used for storing image files of true color, but the GIF89a format can be stored into the background transparent form, and can be a number of survival into a document, thus forming animation.*.png (Portable, Network, Graphic
9、s)*.png is a bitmap file format that can store 32 bits of information, and its image quality is much better than *.gif. Like *.gif, *.png also uses lossless compression to reduce file size. When compressing bitmap data, it uses a variant of the well received L z77 algorithm. At present, more and mor
10、e software begin to support this format, in the near future, it may be popular on the whole Web. *.png images can be grayscale (16 bit) or color (48 bit), or 8 bit index color. The *.png image uses a high-speed alternate display scheme, which displays very fast and needs to download the 1/64 image i
11、nformation to display a low resolution preview image. Unlike *.Gif, the *.png image format does not support animation.*.rle (Run, Length, Compressed)*.rle is a compressed bitmap file format. RLE compression scheme is a very mature compression scheme, characterized by lossless compression (Lossless),
12、 which saves disk space without losing any image data. But there are advantages and disadvantages. It takes more time to open this compressed file. In addition, some applications with poor compatibility may not be able to open the *.Rle file.*.tif/*.tiff (Tag, Image, File, Format)*.tiff is a graphic
13、s file format developed by Aldus for Macintosh, which was first popular in Macintosh, and now supported by mainstream image applications on Windows. At present, it is the most widely used bitmap format M acintosh and PC, in these two kinds of hardware platform and transplant *.tiff graphics is very
14、convenient, most scanners can output *.tiff format image files. The format supports a maximum number of colors up to 1 6M. Its characteristics are: high quality image storage, but the storage space is very large, its size is 3 times 10 times the corresponding *.gif image, *.jpeg image; subtle level
15、information is more conducive to the original tone and color reproduction. The format has two forms of compression and non compression, in which the compression form uses the L ZW (Lempel-Ziv-Welch) lossless compression scheme. In PhotoShop, the *.tiff format supports 24 channels, except for the Pho
16、toShop itself format (i.e., *.psd and *PDD) the only file format that can store multiple four channels. The only disadvantage is that it is very difficult to decompress *.tiff files because of the unique variable structure of *.Tiff. *.tiff format has now been developed to version 6 and is jointly o
17、wned by Aldus and Microsoft, but its format is free to use. Also, in 3 DS, you can also generate files in *.tiff format. The *.tiff file is used to store some colorful and fantastic texture files that combine 3DS, Macintosh, and PhotoShop organically.2 、 mathematical description graphic image file*.
18、bw*.bw is a black and white graphic file format that contains various pixel information.*.cdr (CorelDraw)*.cdr is a graphical file format in CorelDraw. It is a graphic image file format that can be used in all CorelDraw applications.*.col (Color, Map, File)*.col is a palette file format created by p
19、rograms such as Autodesk, Animator, Autodesk, Animator, Pro, etc., which stores the RGB values of various items in the palette.*.dwg*.dwg is a graphical file format used in AutoCAD.*.dxb (drawing, interchange, binary)*.dxb is a graphical file format created by AutoCAD.*.dxf (Autodesk, Drawing, Excha
20、nge, Format)*.dxf is a graphics file format in AutoCAD. It stores graphics in ASCII mode. It is very accurate in representing the size of graphics. It can be edited by large software such as CorelDraw and 3DS.*.wmf (Windows, Metafile, Format)*.wmf is a common Microsoft Windows metafile format, it ha
21、s the characteristics of short, patterns of file, the entire graph often consists of a separate part of the mosaic, but the figure is rough, and can only be invoked in the M icrosoft Office editor.*.emf (Enhanced, MetaFile)*.emf is a Windows 32 bit extended metafile format developed by Microsoft. Th
22、e overall design goal is to make up for the lack of *.wmf file formats used in Microsoft Windows 3.1 (Win16), making metafile easier to use.*.eps (Encapsulated, PostScript)*.eps is a ASCII graphic file format described in PostScript language. It can print high-quality graphic images on PostScript gr
23、aphics printers, which can represent 32 bit graphic images at the highest level. The format is divided into Pho toShop EPS format (Adobe Illustrator Eps) and standard EPS format, in which the standard EPS format can be divided into graphic format and image format. It is worth noting that in PhotoSho
24、p, you can only open the EPS file in the image format. The *.ep s format consists of two parts: the first part is the low resolution image displayed on the screen, which is convenient for preview and location during the image processing. The second part contains separate data of each color separatio
25、n. The *.eps file is stored in the form of D CS/CMYK, the file contains CMYK four colors of separate data, you can directly output four-color mesh. However, in addition to more reliable on a PostScript printer, *.e PS format, there are many defects: firstly, *.eps format image storage efficiency is
26、very low; secondly, the compression scheme of *.eps format is also poor, generally the same image by *.tiff LZW after compression than.Eps * 3 to 4 times the image of small.FilmstripFilmstrip is a slide, which is an output file format in Premiere. Premiere animation output into a long vertical bar,
27、vertical grid composed by independent. Each frame is one frame. The lower left corner of each frame is time coded, and the lower right corner is the frame number. You can call the file in that format in P hotoShop, and then process it using the unique processing capabilities of the PhotoShop. Howeve
28、r, never change the size of the filmstrip file. If it changes, the picture will no longer be stored in the f ilmstrip format and will no longer be able to return to Premiere.*.ico (Icon, file)*.ico is the icon file format for Windows.*.iff (Image, File, Format)*.iff is a graphics file format used by
29、 Amiga and other super graphics processing platform. Hollywood stunt movies are mostly processed by this format, which can reproduce the original scene vividly. Of course, the amount of memory, memory format of computer resources is also very great.*.jpg/*.jpeg (Joint, Photographic, Expert, Group)*.
30、jpg/*.jpeg is a 24 bit image file format, and also a high efficiency compression format,The file format is the product of the JPEG (joint image expert group) standard, developed by ISO and CCI TT (International Telegraph and Telephone Consultative Committee). It is a compression standard for continu
31、ous tone still images. Its original purpose was to use 64Kbps communications lines to transmit 720 * 576 resolution compressed images. With little loss of resolution, the amount of memory needed for the image can be reduced to 10% of the original size. Due to its high compression efficiency and stan
32、dardization requirements, it has been widely used in the transmission of color facsimile, still picture, telephone conference, printing and news picture. But the deleted data can not be restored when decompression, so *.Jpg/*.jpeg file is not suitable for zoom in, and the quality will be affected wh
33、en output printed matter. However, ordinary users do not have to worry about, because the *.jpg/*.jpeg compression algorithm is very advanced, its graphic images of the loss of the effect is not large, a 16 M (24) *.jpg/*.jpeg image looks not much different from photos, non professionals can not eve
34、n distinguish. Similarly, the files stored in *.jpg/*.jpeg format are 1 /10 to 1/20 of other types of graphics files. Under normal circumstances, the *.jpg/*.jpeg file has only dozens of KB, and the highest number of colors can reach 24 bits, so it is widely used in Internet, in order to save valuab
35、le network transmission resources. Similarly, in order to store more graphic images on an optical disk, C D publishers are also happy to adopt the *.jpg/*.jpeg format.*.lbm*.lbm is a graphical file format used in Deluxe Paint, which is similar in encoding to *.iff.*.mag*.mag is a graphical file form
36、at commonly used by the japanese.*.mac (Macintosh)*.mac is a grayscale file format used in Macintosh, used in Macintosh paintbrush, with a resolution of only 720 * 567.*.mpt (Macintosh, Paintbrush)*.mpt is a graphical file format used in Macintosh.*.msk (Mask, Data, File)*.msk is a graphic file form
37、at in Animator Pro, which contains a bitmap graph.*.opt (Optics, Menu, Settings, File) / *.twe (Tween Data File) is the graphic file format created by Animator Pro.*.ply (Polygon, File)*.ply is a graphic file format created by Animator Pro, which contains information about a series of points describ
38、ing polygons.*.pbm/*.pgm/*.ppm (Portable, Pixmap) graphics file format.*.pcd (Kodak, PhotoCD)*.pcd is a Photo CD file format developed by Kodak Corporation, and other software systems can only read it. The format is used primarily to store color scanned images on CD-ROM, which uses YCC color pattern
39、s to define colors in an image. The Y CC color pattern is a variation of the CIE color pattern. The CIE color space is an international standard that defines the color that all human eyes can see. YCC and CIE color space contains more than a display and printing equipment R GB color and CMYK color S
40、haiduodeduo. Most of the Photo CD images have very high quality, and the cost of scanning a roll of film for Photo CD files is not high, but the quality of the scan depends on the type of film used and the level of operation of the scanner user.*.pcx (PC, Paintbrush) /*.pcc*.pcx was originally a com
41、pressed PC bitmap file format supported by Zsofts PC Paintbrush graphics software. Later, Microsoft transplanted the PC Paintbrush into the Windows environment, and the *.pcx image format was supported by more graphic image processing software. The format supports the number of colors from the earli
42、est 16 colors to the current 16 million 770 thousand colors. It uses a range encoding scheme to compress, with a 128 byte file head.*.pic*.pic is a graphical file format that contains images that are not compressed.*.pict/*.pict2/*.pntThe *.pict file format is primarily used on Mac machines and can
43、also be used on PC machines that have Quick Time installed. The file in this format does not apply to printing (if *.pict files are printed on PostScript printers, which cause PostSlipt errors), and are often used in multimedia projects. *.Pict is also one of the formats for Mac applications for ima
44、ge display.*.psd (Adobe, PhotoShop, Document) /*.pdd*.psd is a standard graphics file format used in PhotoShop, which can be stored as RGB or CMYK mode, and can also customize the number of colors and store them. *.psd files can separate and preserve different objects in Ayer (L),Easy to modify and
45、make all kinds of special effects.*.pdd and *.psd, is a graphics file format PhotoShop software secondary use, each a small part to save the image data, including additional layer, mask channel and other content, and the content in the conversion into other formats will be lost. In addition, since t
46、hese two formats are self formatting files supported by P hotoShop, PhotoShop can open and store them at a much faster rate than other formats. The only regret is that, even though PhotoShop has applied compression techniques in its calculations, the image files stored in these two formats are still
47、 very large. However, with the two format for storing images will not cause any loss of data, so when you are in the process of editing, the best choice of the two format disk, then convert the disk space is smaller, better storage quality of other file formats.*.pxr (PiXaR)Perhaps only PIXAR workst
48、ation users understand the file format of *.pxr, which supports grayscale images and RGB color images. You can open a *.Pxr image created by the PIXAR workstation in PhotoShop, or you can store the image file in *.pxr format to transport to the workstation.*.ras (Sun, Raster, files) / *.raw (Raw, GrayScale) graphics file format.Scitex CTScitex CT is an image file format created on the Scitex high grade prepress workstation, which is mainly used for image editing and color separation. The Scitex CT images are always opened in CMYK mode, and if they eventually return to the Scitex system,