Lines Matching full:quality
39 .BI \-quality " N"
40 Scale quantization tables to adjust image quality. Quality is 0 (worst) to
58 runs somewhat slower and needs much more memory. Image quality and speed of
77 .B \-quality
78 switch lets you trade off compressed file size against quality of the
79 reconstructed image: the higher the quality setting, the larger the JPEG file,
81 want to use the lowest quality setting (smallest file) that decompresses into
83 purpose the quality setting should be between 50 and 95; the default of 75 is
85 .B \-quality
89 .B \-quality
93 purposes. Quality values above about 95 are
96 hardly any gain in output image quality.
98 In the other direction, quality values below 50 will produce very small files
99 of low image quality. Settings around 5 to 10 might be useful in preparing an
101 .B \-quality
102 2 (or so) for some amusing Cubist effects. (Note: quality
106 emits a warning message when you give such a quality value, because some
109 if you need to ensure compatibility at low quality values.)
114 is stored in multiple scans of increasing quality. If the file is being
116 scan to display a low-quality image very quickly, and can then improve the
118 standard JPEG file of the same quality setting, and the total file size is
192 quantization values to 8 bits even at low quality settings. (This switch is
217 This example compresses the PPM file foo.ppm with a quality factor of
220 .B cjpeg \-quality
231 .B \-quality
239 cycles. Image quality loss will accumulate; after ten or so cycles the image
249 It's also a win when you are using low quality settings to make very small
