USAGEtjbench <Inputfile (BMP|PPM)> <Quality> [options]
tjbench <Inputfile (JPG)> [options]
- Dynamically allocate JPEG image buffers
- Generate output images in Windows Bitmap format (default=PPM)
- Test bottom-up compression/decompression
- Test performance of the codec when the image is encoded as separate tiles of varying sizes.
-forcemmx, -forcesse, -forcesse2, -forcesse3
- Force MMX, SSE, SSE2, or SSE3 code paths in the underlying codec
-rgb, -bgr, -rgbx, -bgrx, -xbgr, -xrgb
- Test the specified color conversion path in the codec (default: BGR)
- Use the fastest chrominance upsampling algorithm available in the underlying codec
- Use the fastest DCT/IDCT algorithms available in the underlying codec
Use the most accurate DCT/IDCT algorithms available in the underlying codec
- When testing JPEG compression, this option specifies the level of chrominance subsampling to use (<s> = 444, 422, 440, 420, or GRAY). The default is to test Grayscale, 4:2:0, 4:2:2, and 4:4:4 in sequence.
- Output results in tabular rather than verbose format
- Encode RGB input as planar YUV rather than compressing as JPEG
- Decode JPEG image to planar YUV rather than RGB
- 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)
- Perform lossless grayscale conversion prior to decompression test (can be combined with the other transforms above)
- Run each benchmark for at least <t> seconds (default = 5.0)
- 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.