[options] tjbench [options] Options: -alloc = Dynamically allocate JPEG image buffers -bmp = Generate output images in Windows Bitmap format (default = PPM) -bottomup = Test bottom-up compression/decompression -tile = Test performance of the codec when the image is encoded as separate tiles of varying sizes. -rgb, -bgr, -rgbx, -bgrx, -xbgr, -xrgb = Test the specified color conversion path in the codec (default = BGR) -cmyk = Indirectly test YCCK JPEG compression/decompression (the source and destination bitmaps are still RGB. The conversion is done internally prior to compression or after decompression.) -fastupsample = Use the fastest chrominance upsampling algorithm available in the underlying codec -fastdct = Use the fastest DCT/IDCT algorithms available in the underlying codec -accuratedct = Use the most accurate DCT/IDCT algorithms available in the underlying codec -subsamp = When testing JPEG compression, this option specifies the level of chrominance subsampling to use ( = 444, 422, 440, 420, 411, or GRAY). The default is to test Grayscale, 4:2:0, 4:2:2, and 4:4:4 in sequence. -quiet = Output results in tabular rather than verbose format -yuv = Test YUV encoding/decoding functions -yuvpad
= If testing YUV encoding/decoding, this specifies the number of bytes to which each row of each plane in the intermediate YUV image is padded (default = 1) -scale M/N = Scale down the width/height of the decompressed JPEG image by a factor of M/N (M/N = 2/1, 15/8, 7/4, 13/8, 3/2, 11/8, 5/4, 9/8, 1/1, 7/8, 3/4, 5/8, 1/2, 3/8, 1/4, or 1/8) -hflip, -vflip, -transpose, -transverse, -rot90, -rot180, -rot270 = Perform the corresponding lossless transform prior to decompression (these options are mutually exclusive) -grayscale = Perform lossless grayscale conversion prior to decompression test (can be combined with the other transforms above) -benchtime
= Run each benchmark for at least seconds (default = 5.0) -warmup = Execute each benchmark times to prime the cache before taking performance measurements (default = 1) -componly = Stop after running compression tests. Do not test decompression. NOTE: If the quality is specified as a range (e.g. 90-100), a separate test will be performed for all quality values in the range.