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Tag Image File Format (TIFF) is a flexible bitmap format primarily used to store images including photographs and art drawings, originally developed by Aldus Corporation in conjunction with Microsoft Corporation for PostScript printing. TIFF, along with JPEG and PNG, became a popular high-bit color image format. The TIFF format is widely supported in the industry, such as Adobe's Photoshop, The GIMP Team's GIMP, image processing applications such as Ulead PhotoImpact and Paint Shop Pro, desktop printing and page layout applications such as QuarkXPress and Adobe InDesign, scanning, fax, Word processing, Optical Character Recognition and other applications support this format. Adobe, which obtained the PageMaker printing application from Aldus, controls the TIFF specification.
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.