Thumbnail tuning
When we generate a thumbnail, there are many formats to choose, and the following figure is a comparison of generating thumbnails. Image of the original picture of the living room of Bill Gates:
Whether to smoothing is interpolated picture size The original image JPEG format JPEG format thumbnail PNG format thumbnail BMP thumbnail PICT format Abbreviation JPEG Abbreviation is 36,90956,502 142,031481,078247,94257,506 No Yes 36,90971, 154177, 041481, 078291, 47272, 187 Whether 36,90960,862115,166481,078249,09861,962 No 36,90978,235142,978481,078296,4279,395
Data Description: The part of the gray is the size of the original map. In order to make the data are comparable, I am waiting for the data to be equal to the amplification process, which is why the old picture is larger than the original picture. There are two JPEGs in the above picture to handle two different algorithms.
It can be seen from the comparison of the above figure: for the BMP picture, regardless of how to use, the size is fixed: 481,078. And: JPEG format is smaller in smoothing, and the files generated after interpolation processing: 56, 502.
Picture format list:
I. BMP image file format 2, PCX image file format PCX This image file is formed in a development process. The first PCX prototype is a commercial software package called PC Painbrush in Zsoft. Third, TIFF image file format TIFF (TaglmageFileFormat) image file is a more universal image file format developed by Aldus and Microsoft to develop development systems for table publishing systems. Fourth, GIF file format GIF (Graphics Interchange Format is "image interchange format", which is the image file format developed in 1987. V. JPEG file format JPEG is an abbreviation of Joint Photography Experts Group, which is called ".jpg" or ".jpeg", is the most common image file format. Six, TGA format TGA format ( Tagged Graphics is a format of an image file format developed by Truevision, US Truevision. The format of Exif format EXIF is the digital camera image file format advocated by 1994 Fuji Company, in fact, in the same way, difference is to save images In addition to the data, it is also possible to store the date of photography, exposure materials such as aperture, shutter, flash data, and the attached information, and small-sized images. 8. FPX image file format FPX image file format (extension is FPX) is jointly developed by Kodak, Microsoft, HP and Live Pictureinc, SVG format SVG is a scalable vector graphic format. It is an open standard vector graphical language. Ten, PSD file format This is a dedicated file format of Photoshop image processing software, and the file extension is. PSD. 11. CDR file format CDR format is a dedicated graphic file format for famous drawing software CoreLDRAW. Twelve, PCD file format PCD is the abbreviation of Kodak Photocd, the file extension is. POD is a photo cd file format developed by Kodak. Thirteen, DXF file format DXF is the abbreviation of Drawing Exchange Format, the extension is. DXF is the graphical file format in AutoCAD, which stores graphics in ASCII mode. Fourteen, UFO file format It is a dedicated image format of the famous image editing software Ulead PhotoLmapct, fully records all PhotoLmapCT processing image properties. Fifteen, EPS file format EPS is an abbreviation of Encapsulated PostScript, which is a cross-platform standard format, and the extension is on the PC platform. EPS is on the Macintosh platform. EPSF. 16. The original name of the PNG image file format PNG (Portable Network "is" portable network image ", which is the latest image file format accepted online. PNG can provide a lossless compression image file with a length of 30% length than GIF. Author: Tian Chunfeng link: http: //blog.9cbs.net/accesine960/archive/2005/03/08/314590.aspx
Time: 2005-3-8 Wish: You are a happy holiday.
