USAGE: tjbench
[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.