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The Graphics Interchange Format (GIF) is a commonly used image file format that supports animation and transparency. GIF files use LZW compression algorithm for compression and can contain 256 colors. GIF files are typically used for animations and simple images on the web because they can provide smaller file sizes and better image quality. GIF files can be created and edited using many different applications, including Adobe Photoshop, GIMP, and Microsoft Paint. The disadvantage of the GIF file format is that they do not support high-resolution images and true color images, making them unsuitable for complex images and graphics.
OpenEXR is an HDR standard developed by Industrial Light & Magic. OpenEXR file extension is .exr, the common OpenEXR file is FP16 (16bit Float Point, also known as half Float Point) data image file, the data type of each channel is FP16, a total of four channels 64bpp, each channel 1 bit bit is used to mark the "index", 5 bits are used to store the value of the index, 10 bits are used to store the mantissa of the chromaticity coordinates (u, v), and its dynamic range is from 6.14 × 10 ^ -5 to 6.41 × 10 ^ 4.