Simply illustrated, what picture formats in your computer, and the characteristics between them!
1, a standard format in the BMP format Windows, used to store an image independent of the device and the application! So the general procedures are easy to read the image of BMP! Record image data in pixels, each pixel can have a color value of 1, 4, 8, 15, 24, 32 and 64! This information is given in the file header. 24-bit picture is a common BMP file!
2, Joint Image Expert Group Compression Scheme (JPEG) JPEG Compression Scheme is excellent in scanning image and other natural scenery! Some information is lost when compressed! But for some things that we haven't seen, so this image is very wide! But it is a bit difficult in program processing! It is also very convenient to use in the Windows GDI , so it can be used very convenient! General JPEG's compression ratio is 4: 1 is also 8: 3, etc.!
3, Graphics Exchange Format (GIF) GIF is a universal format for display on the web page. GIF is drawn on the line, and the image display of the solid color block is displayed and the image display of the color between the color is very good! That is to say, it is not so good when processing the gradient! GIF files are also compressed! But use no information loss. GIF is mostly stored for 8-bit color information, that is, 256 colors, which is also web security.
4. Exchange Image Format (Exif) Exif is a file format for digital camera capture. The exif contains an image of the JPEG specification compressed, and also records information about the image. Such as shooting date, shutter speed and exposure time, etc.
5, portable network image format (PNG) PNG format retains a lot of points in GIF format, but also provides features with GIF! PNG also uses no information loss compression! PNG can store 8, 24 or 48-bit color information per pixel. PNG can also store an alpha value for each pixel, that is, the image can be transparently handled!
6, label image ["Image" All "Image"] Format Tiff Tiff is a flexible, scalable format supported by many platforms and image processing programs! TIFF files can store images of any bit number per pixel. Compression algorithms can also be used. Multiple images can be stored in a multi-page GIFF file. You can store information related to the image in the file and can be arranged by tags! (Such as host, compression type, etc.!) TIFF format can expand when there is new approval and increased labels!
