Lines Matching full:quality
81 A wide range of quality vs. speed tradeoffs are possible in JPEG processing,
84 ranging from very-high-quality down to fast-preview operation. On the
85 compression side we have generally not provided low-quality choices, since
87 low-quality modes may not meet the JPEG standard's accuracy requirements;
600 returned image to be scaled and allow various speed/quality tradeoffs to be
821 jpeg_set_quality (j_compress_ptr cinfo, int quality, boolean force_baseline)
823 quality setting. The quality value is expressed on the 0..100 scale
824 recommended by IJG (cjpeg's "-quality" switch uses this routine).
825 Note that the exact mapping from quality values to tables may change
830 difference for quality settings below 25, and it effectively prevents
831 very small/low quality files from being generated. The IJG decoder
832 is capable of reading the non-baseline files generated at low quality
841 scale factors give lower quality. This entry point is useful for
843 recommend linear scaling as a user-visible quality scale otherwise.
846 int jpeg_quality_scaling (int quality)
847 Converts a value on the IJG-recommended quality scale to a linear
889 recommended if high quality is a concern. JDCT_DEFAULT and
972 routines will set up table slot 0 for luminance quality and table
1034 for the application's use. Many of the parameters control speed/quality
1036 a poorer-quality image. The defaults select the highest quality (slowest)
1102 JDITHER_NONE no dithering: fast, very low quality
1103 JDITHER_ORDERED ordered dither: moderate speed and quality
1104 JDITHER_FS Floyd-Steinberg dither: slow, high quality
1176 copying. In high-quality modes, rec_outbuf_height is always 1, but some
1177 faster, lower-quality modes set it to larger values (typically 2 to 4).
1227 luminance-quality compression parameters for all color components. You may
1704 increasing quality. In situations where a JPEG file is transmitted across a
1705 slow communications link, a decoder can generate a low-quality image very
1706 quickly from the first scan, then gradually improve the displayed quality as
1708 identical to that of a regular (sequential) JPEG file of the same quality
1734 higher-quality display cycle can be performed from the buffered data after
1830 a final display pass using two-pass quantization for highest quality. This
1913 part of the image is one or more scans better in quality than the upper part.
1924 be full quality across the whole screen. So the right outer loop logic is
1935 arrangement makes it simple to use higher-quality decoding parameters
1973 higher-quality final pass is to be done, it should be started (aborting any
2013 to a higher quality method for the final scan.
2036 very useful way of switching between high-speed and high-quality display.
2047 These methods offer successively better quality and lesser speed. However,
2883 quality-scaling code has been developed for 8-bit use, and probably doesn't
