The graphic image file can be roughly divided into two major categories: a class as a bitmap file; another type is called the drawing class, vector
Class or object-oriented graphic image file. The former describes graphic images in a dot matrix, the latter is a mathematical method
A graphic image consisting of geometric elements. Generally speaking, the latter is meticulous, real,
The resolution of the graphics image is unchanged after zooming, and there is more applications in the professional graphics image processing. 1, dot matrix graphic image file * .bmp (bitmap) *. BMP is the standard image file format in Windows, which has become a practical industry in the PC Windows system.
Standard, compression and non-compression of two forms. It describes bitmaps in a manner that is independent of the device, and non-compressed
Store image data, fast decoding speed, support multiple images storage, common various P C graphics images soft
Both can be processed. In Photoshop, you can use up to 16M color rendering BMP images.
* .dib (Device Independent Bitmap) *. DIB is a graphical file format similar to * .bmp, the ability to describe the image is basically the same as * .bmp, and
And can be run on a variety of hardware platforms, just a large file. Common Various P C graphic image software can
It is enough to process it.
* .gif (Graphics Interchange Format) *. GIF is a graphic text that can be processed in various graphics processing software in various platforms.
Format. It is a standard position that can be transplanted between Macintosh, Amiga, Atati, IBM machine.
Graph format. This format is created by CompuServer, and the maximum storage color can only reach 256. Colors
The depth and image size, *. GIF is similar to * .pcx; on the structure, *. GIF is similar to * .tiff. because
It is a compressed image file format, so most is used on network transmission, and the speed is compared to other images.
The file format is much faster. Its maximum disadvantage is that you can only handle 2 56 colors, so you can't store true color.
Colored image files, but its GIF89A format can be stored in the form of background transparency and can be monitored
A file to form an animation effect.
* .png (portable network graphics) *. PNG is a bitmap file format that can store 32-bit information, and its image quality is over * .gif. Like * .gif, *. PNG also uses a lossless compression method to reduce the size of the file. When compressed bitmap data, it uses
A variant of the L Z77 algorithm. Currently, more and more software began supporting this format.
In the near future, it may be widely popular across the Web. * .png image can be grayscale (1 6 digits)
) Or colored (48 bits), or 8 bits of index color. * .png image is used by high speed alternating display
The case, the display speed is very fast, only one/64 image information can be downloaded to display low resolution preview images
. Unlike * .gif, *. PNG image format does not support animation.
* .RLE (Run Length compressed) *. RLE is a compressed bitmap file format. The RLE compression scheme is an extremely mature compression scheme.
The point is no loss compression (Lossless), which saves the disk space and does not lose any image data. but,
It is advantageous to have a disadvantage. When this compressed file is opened, it takes more time. In addition, some compatibility is not too
A good app may not beaten * .rle file.
* .tif / *. TIFF (TAG Image File Format) *. TIFF is a graphic file format developed by Aldus for Macintosh, and earliest to Macintosh, and now the mainstream image application on Windows supports this format. Currently, it is the most widely used bitmap format on the M acintosh and PCs, which is portable on both hardware platforms * .tiff graphic images is very convenient, most scanners can also output image files in * .tiff format. The number of colors supported in this format is up to
1 6m. It is characterized by: the stored image quality is high, but the occupied storage space is also very large, its size is
3 times the * .gif image, *. JPEG image is 10 times; the fine level of information is more, which is conducive to the original order
Color copy. This format has two forms of compression and non-compression, in which the compressed form is used is a lossless compression scheme of LZW (Lempel-Ziv-Welch). In Photoshop, *. TIFF format support 24
Channel, it is the only one in Photoshop's own format (ie * .psd and * .pdd) to store multiple four channels
File format. The only shortcomings are: due to the unique variable structure of * .tiff, 对 * .tiff text
Partial decompression is very difficult. * .tiff format has now been developed to version 6.0, combined with ALDUS and Microsoft companies
With copyright, but its format can be used free of charge. In addition, you can also generate * .tiff formats in 3 DS.
Part. * .tiff file is used to store some colorful, conceived texture files, which combine 3DS, Macintosh, Photoshop. Mathematical description graphic image file * .bw * .bw is a black and white graphics file format containing various pixel information.
* .cdr (CoreLDRAW) *. CDR is a graphical file format in CorelDraw. It is all in all CoreLDRAW applications
A graphics image file format used.
* .col (color map file) *. Color is a palette created by Autodesk Animator, Autodesk Animator Pro and other programs
File format, which stores the RGB value of various items in the palette.
* .dwg * .dwg is a graphics file format used in AutoCAD.
* .dxb (Drawing Interchange Binary) *. DXB is a graphics file format created by AutoCAD.
* .dxf (Autodesk Drawing Exchange Format) *. DXF is the graphics file format in AutoCAD, which stores graphics in ASCII mode, in the size of the graphics
The aspect is very accurate, can be edited by large software such as CorelDRAW, 3DS.
* .wmf (Windows Metafile Format) *. WMF is a common chair file format in Microsoft Windows, which has a short file short, pattern creation
The characteristics of type, the entire graphics are often spliced from each independent component, but its graphics are often relatively rough.
And you can only call editing in the M ICrosoft Office.
* .emf (Enhanced Metafile) *. EMF is a Windows 32-bit extension element file format developed by Microsoft. Overall design goal
It is necessary to make up for the shortcomings of * .wmf file format used in Microsoft Windows 3.1 (Win16), make
The meta file is more easy to use.
* .eps (Encapsulated postscript) *. EPS is an ASCII graphic file format described in PostScript language, playing in PostScript graphics
High quality graphic images can be printed on the printer, and the highest can represent 32-bit graphic images. This format is divided into Photoshop EPS format (Adobe Illustrator EPS) and standard EPS format, where standard EPS format can be divided into graphics format and image format. It is worth noting that only the EPS file in the image format can be opened in Photoshop. * .ep S format contains two parts: The first part is the low-resolution image displayed by the screen, which is convenient
Preview and positioning at the time of image processing; the second part contains separate materials of each of the points. * .eps file stores in DCS / CMYK, contains separate materials of four colors of CMYK, can directly output a four-color mesh
. However, in addition to being more reliable on the PostScript printer, there are many flaws in *. E PS format: first
First, *. EPS format storage image efficiency is particularly low; second, *. EPS format compression scheme is also poor, generally
After the image is compressed by the * .tiff LZW, the image is 3 to 4 times smaller than the * .eps.
Filmstripfilmstrip is slide, it is an output file format in Premiere. Premiere outputs animation
It is a long vertical bar, and the vertical strip is composed of independent square. Each is one frame. The lower left corner of each frame is time
Code, the lower right corner is the number of frames. You can transfer files in this format in P Hotoshop and apply Photoshop's unique processing. However, don't change the bigness of the Filmstrip file.
Small, if it changed, this picture can no longer save back to the f ilmstrip format, and can no longer return premiere.
* .ico (icon file) *. ICO is the Windows icon file format.
* .IFF (image file format) *. IFF is a graphics file format used on super graphics processing platforms such as Amiga, Hollywood stunt blockbuster
Use this format to process, can be realistic and reproduce the original view. Of course, the format is consumed by memory, exemption, etc.
Machine resources are also huge.
* .jpg / *. JPEG (Joint Photography "*. jpg / *. JPEG is 24-bit image file format, is also a highly efficient compression format, file format is the product of JPEG (Joint Image Expert Group) standard This standard is from ISO and CCI TT (International Telephone Consultation)
The committee) is commonly developed and is a compression standard for continuous tone still images. Its initial purpose is to use
64kbps communication line transmits an image after 720 × 576 resolution. Those resolutions are minimal,
You can reduce the amount of storage required to the original size to 10%. Due to its efficient compression efficiency and standardization requirements
It is currently used in color fax, still images, conference calls, printing and news images. but
Those deleted information cannot be restored during decompression, so * .jpg / *. JPEG file is not suitable for enlargement
The quality will also be affected when outputting a printing product. However, ordinary users don't have to worry, because * .jpg / *. JPEG's compression algorithm is very advanced, it is not very much on the loss of graphic images, one 6 m (24 digits)
The * .jpg / *. JPEG image looks with a lot of differences, non-professionals can't even distinguish. with
A picture, with * .jpg / *. The file stored in JPEG format is 1/10 ~ 1/20 of other types of graphics files. Under normal circumstances, *. Jpg / *. JPEG file is only tens of KB, and the number of color can reach 24 digits, so it
Widely used on the Internet to save valuable network transmission resources. Similarly, in order to be on a disc
Store more graphic images, C D publishers are also happy to use * .jpg / *. Jpeg format. * .lbm * .lbm is a graphical file format used in Deluxe Pain, which is similar to * .IFF.
* .mag * .mag is a graphical file format commonly used by Japanese.
* .mac (Macintosh) *. Mac is a grayscale graphic file format used in Macintosh, which is made in Macintosh Paintbrush.
Use, its resolution can only be 720 × 567.
* .mpt (Macintosh Paintbrush) *. MPT is a graphics file format used in Macintosh.
* .msk (Mask Data file) *. MSK is a graphical file format in the Animator Pro, which contains a bitmap graphic.
* .Opt (Optics Menu Settings File) / * .twe (Tween Data file) is the graphical file format created by Animator Pro.
* .ply (POLYGON FILE) *. PLY is a graphical file format created by Animator Pro, which contains a series of departments.
The information of the list.
* .pbm / *. pgm / *. PPM (Portable Pixmap) graphics file format.
* .pcd (kodak photocd) *. PCD is a photo CD file format, developed by Kodak, other software systems can only read it
take. This format is mainly used to store color scan images on the CD-ROM, which defines images using YCC color mode
The color. Y CC color mode is a variant of CIE color mode. CIE color space is defined all human eyes
The international standard of the color can be observed. YCC and CIE color space contain R GB colors than the display and printing equipment
And more colors of CMYK. Most of the photo CD image has very high quality, scanning a film
The cost of the PHOTO CD file is not high, but the quality of the scan is also dependent on the type and scanner of the film used.
The level of operation of the user.
* .pcx (PC PaintBrush) / *. PCC * .PCX was earliered by Zsoft's PC Paintbrush graphics software supported by a compressed PC bit
Figure file format. Later, Microsoft ported PC Paintbrush to a Windows environment, *. PCX image
The format also has been supported by more graphic image processing software. The number of colors supported by this format has developed from the earliest 16 color to the current 1 677 million colors. It uses the stroke coding scheme to compress, with a 128-byte
File head.
* .pic * .pic is a graphics file format containing uncompressed image information.
* .pict / *. Pict2 / *. Pnt * .pict file format is mainly applied to the MAC, or it can be used on the PC installed in Quick Time. Should
Format files do not apply to printing (if you print * .pict format on the PostScript printer,
Causes a PostSlipt error) and is often used in multimedia projects. * .pict is also the Mac application for the map
One of the formats shown in the display.
* .psd (Adobe Photoshop Document) / *. pdd * .psd is a standard graphical file format used in Photoshop, which can be stored as RGB or CMYK mode.
It is also possible to customize the number of colors and store it. * .psd files can bring different objects to layer (L Ayer)
The way is separated and saved, which is easy to modify and produce a variety of special effects. * .pdd and * .psd are the same graphics file format for Photoshop software, and can save pictures.
Each fine portion like data, including layers, additional mask channels, and other content, and these contents
It will be lost when it is transferred into other formats. In addition, because both formats are the format supported by P Hotoshop.
The file, so Photoshop can open and store them in faster speed than other formats. The only regret is that although Photoshop applies compression technology during the calculation process, image files stored in these two formats
Still very large. However, storing images with these two formats will not cause any data loss, so when you are
When the editing process, it is best to choose both format storage, and then convert it into a small disk space.
There is a good storage quality in other file formats.
* .pxr (Pixar) may only know the Pixar workstation user to know * .pxr file format, the format supports grayscale images and
RGB color image. You can open a * .pxr image created by the PIXAR station in Photoshop.
Store the image file with * .pxr format to deliver it to the workstation.
* .ras (sun raster files) / * .raw (raw grayscale) graphics file format.
Scitex CTScitex CT is an image file format created on Scitex's high-end workstation, mainly
An editing and different color of the image. Scitex CT images are always opened in CMYK mode, if they finally want
Return to the Scitex system, keep its CMYK mode. You can use Photoshop to open and edit the Scitex CT image.
* .tga (tagged graphic) *. TGA is True Vision's image file format for its display card development, the creation time is earlier, the most
High-color numbers can reach 32 bits, including 8 ALPHA channels for displaying live television. This format has been widely
Applying to various fields of the P C machine, and the format file enables Windows and 3DS to exchange image files into
Fine. You can generate colorful * .tga files in 3DS, and then use Photoshop, Freeherd, Painter and other applications to modify and render in Win Dows. Scitex CTScitex CT is an image file format created on Scitex's high-end workstation, mainly
An editing and different color of the image. Scitex CT images are always opened in CMYK mode, if they finally want
Return to the Scitex system, keep its CMYK mode. You can use Photoshop to open and edit the Scitex CT image.
* .tga (tagged graphic) *. TGA is True Vision's image file format for its display card development, the creation time is earlier, the most
High-color numbers can reach 32 bits, including 8 ALPHA channels for displaying live television. This format has been widely
Applying to various fields of the P C machine, and the format file enables Windows and 3DS to exchange image files into
Fine. You can generate colorful * .tga files in 3DS, and then use Photoshop, Freeherd, Painter and other applications to modify and render in Win Dows.
* .win * .win is a graphical file format similar to * .tga.
* .xbm (x bitmap) *. XBM is a graphics file format.
