Lines Matching refs:quantization
76 and color quantization. The application indirectly selects use of this code
79 library automatically invokes color quantization.
235 quantization to deliver colormapped output.) If you request colormapped
621 quantization, jpeg_start_decompress() will do everything needed before data
651 relevant parameters (scaling, output color space, and quantization flag).
821 Constructs JPEG quantization tables appropriate for the indicated
825 in future IJG releases as more is learned about DCT quantization.
826 If the force_baseline parameter is TRUE, then the quantization table
853 Set default quantization tables with linear q_scale_factor[] values
859 Allows an arbitrary quantization table to be created. which_tbl
1013 Pointers to coefficient quantization tables, one per table slot,
1016 is general enough to define any quantization table. The other
1021 Linear quantization scaling factors (percentage, initialized 100)
1924 quantization for display passes made while the image is arriving, followed by
1925 a final display pass using two-pass quantization for highest quality. This
2084 * jpeg_start_output() performs input only if you request 2-pass quantization
2110 of course this has no impact if not using color quantization. Typically
2125 * Color quantization mode can be changed under the rules described below.
2128 quantization method is used.
2130 When generating color-quantized output, changing quantization method is a
2132 The library allows you to change among its three quantization methods:
2133 1. Single-pass quantization to a fixed color cube.
2135 2. Single-pass quantization to an application-supplied colormap.
2138 3. Two-pass quantization to a colormap chosen specifically for the image.
2156 enable flags for any other quantization methods you plan to change to later.
2159 can change to any enabled quantization method by setting two_pass_quantize
2181 When using two-pass quantization, jpeg_start_output() makes a pass over the
2189 conditions. The combination of 2-pass quantization and a not-yet-fully-read
2240 A JPEG file normally contains several hundred bytes worth of quantization
2267 decompression objects, a quantization or Huffman table will be retained for
2273 quantization and Huffman table struct contains a boolean field "sent_table",
2295 containing only SOI, DQT and/or DHT markers, and EOI. All the quantization
2327 for an example of copying quantization tables.
2334 to load a fixed quantization table into table slot "n":
2340 /* Qtable[] is desired quantization table, in natural array order */
2360 contain a quantization table definition, your master table would get
2764 When writing raw DCT coefficients, it is crucial that the JPEG quantization
2875 Some operating modes (eg, two-pass color quantization) require full-image
2931 4. To perform 2-pass color quantization, the decompressor also needs a
2938 buffers and quantization pixel buffer. The "fixed-size" data will be
2949 for color quantization. Also, it needs a full-image DCT coefficient buffer
2987 own DCT quantization tables; the existing quality-scaling code has been
3103 quantization, or single-pass quantization to an externally supplied color