GIF (Graphics Interchange Format) is a useful 8-bit-per-pixel bitmap image format created by CompuServe in 1987. Since then it has become wide used for its wide support and portability. GIF supports online drawings, pictures with blocks of solid colors, and pictures with sharp boundaries between colors. GIF is unsuitable for photographs due to its 256 distinct colors from the over 16 million representable in 24-bit RGB limitation. However, there is a hack that can overcome this limitation under certain circumstances. On the process of compressing, there is no information lost in GIF files.  

ICO is a image file extension for small Windows icon. *.ICO can store more than one images with different sizes or colors. Normally it is 16*16 and 32*32 pixels square with 16 colors. Windows XP or VISTA supports bigger size like 48*48 or 256*256 and 32-bit color depth.

BMP (Bitmap) is very popular nowadays due to the common use of Windows. That is because BMP is the standard format used by Windows for saving image files. It contains more image information than the JPEG, and there is almost no compression of images. So it takes a larger disk space. Presently, 24 bits per pixel BMP files are the most common in all the 1, 4, 8, 15, 24, 32, 64 bits per pixel BMP files.

To convert gif ico to bmp file, please download BMP Picture Maker.



Other image format definition:

PSD/PDD is the special format for Photoshop (an image designing software) developed by Adobe Cop. PSD files could be saved in RGB or CMYK mode, which couldnít only customize and save the color, but also save information on layer, channel and path of Photoshop. Itís the only format that could support all color modes for images. As big as its size is, it could be applied in most plane software and some editing software.

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