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Clean up qtable code and change defaults

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This commit is contained in:
Frank Bossen
2014-11-27 16:11:57 -05:00
parent f3db724c2d
commit 30ef0977be
3 changed files with 189 additions and 87 deletions
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4
cjpeg.c
View File

@@ -534,14 +534,14 @@ parse_switches (j_compress_ptr cinfo, int argc, char **argv,
jpeg_set_quality(cinfo, 75, TRUE); jpeg_set_quality(cinfo, 75, TRUE);
} else if (keymatch(arg, "tune-ms-ssim", 6)) { } else if (keymatch(arg, "tune-ms-ssim", 6)) {
jpeg_c_set_int_param(cinfo, JINT_BASE_QUANT_TBL_IDX, 2); jpeg_c_set_int_param(cinfo, JINT_BASE_QUANT_TBL_IDX, 3);
jpeg_c_set_float_param(cinfo, JFLOAT_LAMBDA_LOG_SCALE1, 12.0); jpeg_c_set_float_param(cinfo, JFLOAT_LAMBDA_LOG_SCALE1, 12.0);
jpeg_c_set_float_param(cinfo, JFLOAT_LAMBDA_LOG_SCALE2, 13.0); jpeg_c_set_float_param(cinfo, JFLOAT_LAMBDA_LOG_SCALE2, 13.0);
jpeg_c_set_bool_param(cinfo, JBOOLEAN_USE_LAMBDA_WEIGHT_TBL, TRUE); jpeg_c_set_bool_param(cinfo, JBOOLEAN_USE_LAMBDA_WEIGHT_TBL, TRUE);
jpeg_set_quality(cinfo, 75, TRUE); jpeg_set_quality(cinfo, 75, TRUE);
} else if (keymatch(arg, "tune-hvs-psnr", 6)) { } else if (keymatch(arg, "tune-hvs-psnr", 6)) {
jpeg_c_set_int_param(cinfo, JINT_BASE_QUANT_TBL_IDX, 4); jpeg_c_set_int_param(cinfo, JINT_BASE_QUANT_TBL_IDX, 3);
jpeg_c_set_float_param(cinfo, JFLOAT_LAMBDA_LOG_SCALE1, 14.75); jpeg_c_set_float_param(cinfo, JFLOAT_LAMBDA_LOG_SCALE1, 14.75);
jpeg_c_set_float_param(cinfo, JFLOAT_LAMBDA_LOG_SCALE2, 16.5); jpeg_c_set_float_param(cinfo, JFLOAT_LAMBDA_LOG_SCALE2, 16.5);
jpeg_c_set_bool_param(cinfo, JBOOLEAN_USE_LAMBDA_WEIGHT_TBL, TRUE); jpeg_c_set_bool_param(cinfo, JBOOLEAN_USE_LAMBDA_WEIGHT_TBL, TRUE);

141
jcparam.c
View File

@@ -70,9 +70,10 @@ jpeg_add_quant_table (j_compress_ptr cinfo, int which_tbl,
* The spec says that the values given produce "good" quality, and * The spec says that the values given produce "good" quality, and
* when divided by 2, "very good" quality. * when divided by 2, "very good" quality.
*/ */
static const unsigned int std_luminance_quant_tbl[6][DCTSIZE2] = { static const unsigned int std_luminance_quant_tbl[9][DCTSIZE2] = {
{ {
// JPEG Annex K /* JPEG Annex K
*/
16, 11, 10, 16, 24, 40, 51, 61, 16, 11, 10, 16, 24, 40, 51, 61,
12, 12, 14, 19, 26, 58, 60, 55, 12, 12, 14, 19, 26, 58, 60, 55,
14, 13, 16, 24, 40, 57, 69, 56, 14, 13, 16, 24, 40, 57, 69, 56,
@@ -83,7 +84,8 @@ static const unsigned int std_luminance_quant_tbl[6][DCTSIZE2] = {
72, 92, 95, 98, 112, 100, 103, 99 72, 92, 95, 98, 112, 100, 103, 99
}, },
{ {
// Flat /* flat
*/
16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16,
16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16,
16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16,
@@ -104,7 +106,8 @@ static const unsigned int std_luminance_quant_tbl[6][DCTSIZE2] = {
68, 90, 90, 96, 113, 102, 105, 103 68, 90, 90, 96, 113, 102, 105, 103
}, },
{ {
// From http://www.imagemagick.org/discourse-server/viewtopic.php?f=22&t=20333&p=98008#p98008 /* From http://www.imagemagick.org/discourse-server/viewtopic.php?f=22&t=20333&p=98008#p98008
*/
16, 16, 16, 18, 25, 37, 56, 85, 16, 16, 16, 18, 25, 37, 56, 85,
16, 17, 20, 27, 34, 40, 53, 75, 16, 17, 20, 27, 34, 40, 53, 75,
16, 20, 24, 31, 43, 62, 91, 135, 16, 20, 24, 31, 43, 62, 91, 135,
@@ -125,30 +128,8 @@ static const unsigned int std_luminance_quant_tbl[6][DCTSIZE2] = {
70, 75, 100, 102, 116, 100, 107, 98 70, 75, 100, 102, 116, 100, 107, 98
}, },
{ {
#if 0 /* Relevance of human vision to JPEG-DCT compression (1992) Klein, Silverstein and Carney.
// DCTune perceptual optimization of compressed dental X-Rays (1997) Watson, Taylor, Borthwick */
7, 8, 10, 14, 23, 44, 95, 241,
8, 8, 11, 15, 25, 47, 102, 255,
10, 11, 13, 19, 31, 58, 127, 255,
14, 15, 19, 27, 44, 83, 181, 255,
23, 25, 31, 44, 72, 136, 255, 255,
44, 47, 58, 83, 136, 255, 255, 255,
95, 102, 127, 181, 255, 255, 255, 255,
241, 255, 255, 255, 255, 255, 255, 255
#endif
#if 0
// A visual detection model for DCT coefficient quantization (12/9/93) Ahumada, Watson, Peterson
15, 11, 11, 12, 15, 19, 25, 32,
11, 13, 10, 10, 12, 15, 19, 24,
11, 10, 14, 14, 16, 18, 22, 27,
12, 10, 14, 18, 21, 24, 28, 33,
15, 12, 16, 21, 26, 31, 36, 42,
19, 15, 18, 24, 31, 38, 45, 53,
25, 19, 22, 28, 36, 45, 55, 65,
32, 24, 27, 33, 42, 53, 65, 77
#endif
#if 1
// Relevance of human vision to JPEG-DCT compression (1992) Klein, Silverstein and Carney.
10, 12, 14, 19, 26, 38, 57, 86, 10, 12, 14, 19, 26, 38, 57, 86,
12, 18, 21, 28, 35, 41, 54, 76, 12, 18, 21, 28, 35, 41, 54, 76,
14, 21, 25, 32, 44, 63, 92, 136, 14, 21, 25, 32, 44, 63, 92, 136,
@@ -157,9 +138,34 @@ static const unsigned int std_luminance_quant_tbl[6][DCTSIZE2] = {
38, 41, 63, 75, 95, 125, 170, 239, 38, 41, 63, 75, 95, 125, 170, 239,
57, 54, 92, 107, 132, 170, 227, 312, 57, 54, 92, 107, 132, 170, 227, 312,
86, 76, 136, 157, 190, 239, 312, 419 86, 76, 136, 157, 190, 239, 312, 419
#endif },
#if 0 {
// An improved detection model for DCT coefficient quantization (1993) Peterson, Ahumada and Watson /* DCTune perceptual optimization of compressed dental X-Rays (1997) Watson, Taylor, Borthwick
*/
7, 8, 10, 14, 23, 44, 95, 241,
8, 8, 11, 15, 25, 47, 102, 255,
10, 11, 13, 19, 31, 58, 127, 255,
14, 15, 19, 27, 44, 83, 181, 255,
23, 25, 31, 44, 72, 136, 255, 255,
44, 47, 58, 83, 136, 255, 255, 255,
95, 102, 127, 181, 255, 255, 255, 255,
241, 255, 255, 255, 255, 255, 255, 255
},
{
/* A visual detection model for DCT coefficient quantization (12/9/93) Ahumada, Watson, Peterson
*/
15, 11, 11, 12, 15, 19, 25, 32,
11, 13, 10, 10, 12, 15, 19, 24,
11, 10, 14, 14, 16, 18, 22, 27,
12, 10, 14, 18, 21, 24, 28, 33,
15, 12, 16, 21, 26, 31, 36, 42,
19, 15, 18, 24, 31, 38, 45, 53,
25, 19, 22, 28, 36, 45, 55, 65,
32, 24, 27, 33, 42, 53, 65, 77
},
{
/* An improved detection model for DCT coefficient quantization (1993) Peterson, Ahumada and Watson
*/
14, 10, 11, 14, 19, 25, 34, 45, 14, 10, 11, 14, 19, 25, 34, 45,
10, 11, 11, 12, 15, 20, 26, 33, 10, 11, 11, 12, 15, 20, 26, 33,
11, 11, 15, 18, 21, 25, 31, 38, 11, 11, 15, 18, 21, 25, 31, 38,
@@ -168,13 +174,13 @@ static const unsigned int std_luminance_quant_tbl[6][DCTSIZE2] = {
25, 20, 25, 33, 43, 54, 64, 74, 25, 20, 25, 33, 43, 54, 64, 74,
34, 26, 31, 39, 51, 64, 77, 91, 34, 26, 31, 39, 51, 64, 77, 91,
45, 33, 38, 47, 59, 74, 91, 108 45, 33, 38, 47, 59, 74, 91, 108
#endif
} }
}; };
static const unsigned int std_chrominance_quant_tbl[6][DCTSIZE2] = { static const unsigned int std_chrominance_quant_tbl[9][DCTSIZE2] = {
{ {
// JPEG Annex K /* JPEG Annex K
*/
17, 18, 24, 47, 99, 99, 99, 99, 17, 18, 24, 47, 99, 99, 99, 99,
18, 21, 26, 66, 99, 99, 99, 99, 18, 21, 26, 66, 99, 99, 99, 99,
24, 26, 56, 99, 99, 99, 99, 99, 24, 26, 56, 99, 99, 99, 99, 99,
@@ -185,7 +191,8 @@ static const unsigned int std_chrominance_quant_tbl[6][DCTSIZE2] = {
99, 99, 99, 99, 99, 99, 99, 99 99, 99, 99, 99, 99, 99, 99, 99
}, },
{ {
// Flat /* flat
*/
16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16,
16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16,
16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16,
@@ -227,15 +234,56 @@ static const unsigned int std_chrominance_quant_tbl[6][DCTSIZE2] = {
97, 97, 99, 99, 99, 99, 97, 99 97, 97, 99, 99, 99, 99, 97, 99
}, },
{ {
// JPEG Annex K /* Relevance of human vision to JPEG-DCT compression (1992) Klein, Silverstein and Carney.
17, 18, 24, 47, 99, 99, 99, 99, * Copied from luma
18, 21, 26, 66, 99, 99, 99, 99, */
24, 26, 56, 99, 99, 99, 99, 99, 10, 12, 14, 19, 26, 38, 57, 86,
47, 66, 99, 99, 99, 99, 99, 99, 12, 18, 21, 28, 35, 41, 54, 76,
99, 99, 99, 99, 99, 99, 99, 99, 14, 21, 25, 32, 44, 63, 92, 136,
99, 99, 99, 99, 99, 99, 99, 99, 19, 28, 32, 41, 54, 75, 107, 157,
99, 99, 99, 99, 99, 99, 99, 99, 26, 35, 44, 54, 70, 95, 132, 190,
99, 99, 99, 99, 99, 99, 99, 99 38, 41, 63, 75, 95, 125, 170, 239,
57, 54, 92, 107, 132, 170, 227, 312,
86, 76, 136, 157, 190, 239, 312, 419
},
{
/* DCTune perceptual optimization of compressed dental X-Rays (1997) Watson, Taylor, Borthwick
* Copied from luma
*/
7, 8, 10, 14, 23, 44, 95, 241,
8, 8, 11, 15, 25, 47, 102, 255,
10, 11, 13, 19, 31, 58, 127, 255,
14, 15, 19, 27, 44, 83, 181, 255,
23, 25, 31, 44, 72, 136, 255, 255,
44, 47, 58, 83, 136, 255, 255, 255,
95, 102, 127, 181, 255, 255, 255, 255,
241, 255, 255, 255, 255, 255, 255, 255
},
{
/* A visual detection model for DCT coefficient quantization (12/9/93) Ahumada, Watson, Peterson
* Copied from luma
*/
15, 11, 11, 12, 15, 19, 25, 32,
11, 13, 10, 10, 12, 15, 19, 24,
11, 10, 14, 14, 16, 18, 22, 27,
12, 10, 14, 18, 21, 24, 28, 33,
15, 12, 16, 21, 26, 31, 36, 42,
19, 15, 18, 24, 31, 38, 45, 53,
25, 19, 22, 28, 36, 45, 55, 65,
32, 24, 27, 33, 42, 53, 65, 77
},
{
/* An improved detection model for DCT coefficient quantization (1993) Peterson, Ahumada and Watson
* Copied from luma
*/
14, 10, 11, 14, 19, 25, 34, 45,
10, 11, 11, 12, 15, 20, 26, 33,
11, 11, 15, 18, 21, 25, 31, 38,
14, 12, 18, 24, 28, 33, 39, 47,
19, 15, 21, 28, 36, 43, 51, 59,
25, 20, 25, 33, 43, 54, 64, 74,
34, 26, 31, 39, 51, 64, 77, 91,
45, 33, 38, 47, 59, 74, 91, 108
} }
}; };
@@ -458,8 +506,9 @@ jpeg_set_defaults (j_compress_ptr cinfo)
#endif #endif
cinfo->master->trellis_quant = cinfo->master->use_moz_defaults; cinfo->master->trellis_quant = cinfo->master->use_moz_defaults;
cinfo->master->lambda_log_scale1 = 16.0; cinfo->master->lambda_log_scale1 = 14.75;
cinfo->master->lambda_log_scale2 = 15.5; cinfo->master->lambda_log_scale2 = 16.5;
cinfo->master->quant_tbl_master_idx = 3;
cinfo->master->use_lambda_weight_tbl = TRUE; cinfo->master->use_lambda_weight_tbl = TRUE;
cinfo->master->use_scans_in_trellis = FALSE; cinfo->master->use_scans_in_trellis = FALSE;

131
rdswitch.c
View File

@@ -279,8 +279,10 @@ bogus:
* The spec says that the values given produce "good" quality, and * The spec says that the values given produce "good" quality, and
* when divided by 2, "very good" quality. * when divided by 2, "very good" quality.
*/ */
static const unsigned int std_luminance_quant_tbl[6][DCTSIZE2] = { static const unsigned int std_luminance_quant_tbl[9][DCTSIZE2] = {
{ {
/* JPEG Annex K
*/
16, 11, 10, 16, 24, 40, 51, 61, 16, 11, 10, 16, 24, 40, 51, 61,
12, 12, 14, 19, 26, 58, 60, 55, 12, 12, 14, 19, 26, 58, 60, 55,
14, 13, 16, 24, 40, 57, 69, 56, 14, 13, 16, 24, 40, 57, 69, 56,
@@ -291,6 +293,8 @@ static const unsigned int std_luminance_quant_tbl[6][DCTSIZE2] = {
72, 92, 95, 98, 112, 100, 103, 99 72, 92, 95, 98, 112, 100, 103, 99
}, },
{ {
/* flat
*/
16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16,
16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16,
16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16,
@@ -311,7 +315,8 @@ static const unsigned int std_luminance_quant_tbl[6][DCTSIZE2] = {
68, 90, 90, 96, 113, 102, 105, 103 68, 90, 90, 96, 113, 102, 105, 103
}, },
{ {
// From http://www.imagemagick.org/discourse-server/viewtopic.php?f=22&t=20333&p=98008#p98008 /* From http://www.imagemagick.org/discourse-server/viewtopic.php?f=22&t=20333&p=98008#p98008
*/
16, 16, 16, 18, 25, 37, 56, 85, 16, 16, 16, 18, 25, 37, 56, 85,
16, 17, 20, 27, 34, 40, 53, 75, 16, 17, 20, 27, 34, 40, 53, 75,
16, 20, 24, 31, 43, 62, 91, 135, 16, 20, 24, 31, 43, 62, 91, 135,
@@ -332,30 +337,8 @@ static const unsigned int std_luminance_quant_tbl[6][DCTSIZE2] = {
70, 75, 100, 102, 116, 100, 107, 98 70, 75, 100, 102, 116, 100, 107, 98
}, },
{ {
#if 0 /* Relevance of human vision to JPEG-DCT compression (1992) Klein, Silverstein and Carney.
// DCTune perceptual optimization of compressed dental X-Rays (1997) Watson, Taylor, Borthwick */
7, 8, 10, 14, 23, 44, 95, 241,
8, 8, 11, 15, 25, 47, 102, 255,
10, 11, 13, 19, 31, 58, 127, 255,
14, 15, 19, 27, 44, 83, 181, 255,
23, 25, 31, 44, 72, 136, 255, 255,
44, 47, 58, 83, 136, 255, 255, 255,
95, 102, 127, 181, 255, 255, 255, 255,
241, 255, 255, 255, 255, 255, 255, 255
#endif
#if 0
// A visual detection model for DCT coefficient quantization (12/9/93) Ahumada, Watson, Peterson
15, 11, 11, 12, 15, 19, 25, 32,
11, 13, 10, 10, 12, 15, 19, 24,
11, 10, 14, 14, 16, 18, 22, 27,
12, 10, 14, 18, 21, 24, 28, 33,
15, 12, 16, 21, 26, 31, 36, 42,
19, 15, 18, 24, 31, 38, 45, 53,
25, 19, 22, 28, 36, 45, 55, 65,
32, 24, 27, 33, 42, 53, 65, 77
#endif
#if 1
// Relevance of human vision to JPEG-DCT compression (1992) Klein, Silverstein and Carney.
10, 12, 14, 19, 26, 38, 57, 86, 10, 12, 14, 19, 26, 38, 57, 86,
12, 18, 21, 28, 35, 41, 54, 76, 12, 18, 21, 28, 35, 41, 54, 76,
14, 21, 25, 32, 44, 63, 92, 136, 14, 21, 25, 32, 44, 63, 92, 136,
@@ -364,9 +347,34 @@ static const unsigned int std_luminance_quant_tbl[6][DCTSIZE2] = {
38, 41, 63, 75, 95, 125, 170, 239, 38, 41, 63, 75, 95, 125, 170, 239,
57, 54, 92, 107, 132, 170, 227, 312, 57, 54, 92, 107, 132, 170, 227, 312,
86, 76, 136, 157, 190, 239, 312, 419 86, 76, 136, 157, 190, 239, 312, 419
#endif },
#if 0 {
// An improved detection model for DCT coefficient quantization (1993) Peterson, Ahumada and Watson /* DCTune perceptual optimization of compressed dental X-Rays (1997) Watson, Taylor, Borthwick
*/
7, 8, 10, 14, 23, 44, 95, 241,
8, 8, 11, 15, 25, 47, 102, 255,
10, 11, 13, 19, 31, 58, 127, 255,
14, 15, 19, 27, 44, 83, 181, 255,
23, 25, 31, 44, 72, 136, 255, 255,
44, 47, 58, 83, 136, 255, 255, 255,
95, 102, 127, 181, 255, 255, 255, 255,
241, 255, 255, 255, 255, 255, 255, 255
},
{
/* A visual detection model for DCT coefficient quantization (12/9/93) Ahumada, Watson, Peterson
*/
15, 11, 11, 12, 15, 19, 25, 32,
11, 13, 10, 10, 12, 15, 19, 24,
11, 10, 14, 14, 16, 18, 22, 27,
12, 10, 14, 18, 21, 24, 28, 33,
15, 12, 16, 21, 26, 31, 36, 42,
19, 15, 18, 24, 31, 38, 45, 53,
25, 19, 22, 28, 36, 45, 55, 65,
32, 24, 27, 33, 42, 53, 65, 77
},
{
/* An improved detection model for DCT coefficient quantization (1993) Peterson, Ahumada and Watson
*/
14, 10, 11, 14, 19, 25, 34, 45, 14, 10, 11, 14, 19, 25, 34, 45,
10, 11, 11, 12, 15, 20, 26, 33, 10, 11, 11, 12, 15, 20, 26, 33,
11, 11, 15, 18, 21, 25, 31, 38, 11, 11, 15, 18, 21, 25, 31, 38,
@@ -375,12 +383,13 @@ static const unsigned int std_luminance_quant_tbl[6][DCTSIZE2] = {
25, 20, 25, 33, 43, 54, 64, 74, 25, 20, 25, 33, 43, 54, 64, 74,
34, 26, 31, 39, 51, 64, 77, 91, 34, 26, 31, 39, 51, 64, 77, 91,
45, 33, 38, 47, 59, 74, 91, 108 45, 33, 38, 47, 59, 74, 91, 108
#endif
} }
}; };
static const unsigned int std_chrominance_quant_tbl[6][DCTSIZE2] = { static const unsigned int std_chrominance_quant_tbl[9][DCTSIZE2] = {
{ {
/* JPEG Annex K
*/
17, 18, 24, 47, 99, 99, 99, 99, 17, 18, 24, 47, 99, 99, 99, 99,
18, 21, 26, 66, 99, 99, 99, 99, 18, 21, 26, 66, 99, 99, 99, 99,
24, 26, 56, 99, 99, 99, 99, 99, 24, 26, 56, 99, 99, 99, 99, 99,
@@ -391,6 +400,8 @@ static const unsigned int std_chrominance_quant_tbl[6][DCTSIZE2] = {
99, 99, 99, 99, 99, 99, 99, 99 99, 99, 99, 99, 99, 99, 99, 99
}, },
{ {
/* flat
*/
16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16,
16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16,
16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16,
@@ -432,14 +443,56 @@ static const unsigned int std_chrominance_quant_tbl[6][DCTSIZE2] = {
97, 97, 99, 99, 99, 99, 97, 99 97, 97, 99, 99, 99, 99, 97, 99
}, },
{ {
17, 18, 24, 47, 99, 99, 99, 99, /* Relevance of human vision to JPEG-DCT compression (1992) Klein, Silverstein and Carney.
18, 21, 26, 66, 99, 99, 99, 99, * Copied from luma
24, 26, 56, 99, 99, 99, 99, 99, */
47, 66, 99, 99, 99, 99, 99, 99, 10, 12, 14, 19, 26, 38, 57, 86,
99, 99, 99, 99, 99, 99, 99, 99, 12, 18, 21, 28, 35, 41, 54, 76,
99, 99, 99, 99, 99, 99, 99, 99, 14, 21, 25, 32, 44, 63, 92, 136,
99, 99, 99, 99, 99, 99, 99, 99, 19, 28, 32, 41, 54, 75, 107, 157,
99, 99, 99, 99, 99, 99, 99, 99 26, 35, 44, 54, 70, 95, 132, 190,
38, 41, 63, 75, 95, 125, 170, 239,
57, 54, 92, 107, 132, 170, 227, 312,
86, 76, 136, 157, 190, 239, 312, 419
},
{
/* DCTune perceptual optimization of compressed dental X-Rays (1997) Watson, Taylor, Borthwick
* Copied from luma
*/
7, 8, 10, 14, 23, 44, 95, 241,
8, 8, 11, 15, 25, 47, 102, 255,
10, 11, 13, 19, 31, 58, 127, 255,
14, 15, 19, 27, 44, 83, 181, 255,
23, 25, 31, 44, 72, 136, 255, 255,
44, 47, 58, 83, 136, 255, 255, 255,
95, 102, 127, 181, 255, 255, 255, 255,
241, 255, 255, 255, 255, 255, 255, 255
},
{
/* A visual detection model for DCT coefficient quantization (12/9/93) Ahumada, Watson, Peterson
* Copied from luma
*/
15, 11, 11, 12, 15, 19, 25, 32,
11, 13, 10, 10, 12, 15, 19, 24,
11, 10, 14, 14, 16, 18, 22, 27,
12, 10, 14, 18, 21, 24, 28, 33,
15, 12, 16, 21, 26, 31, 36, 42,
19, 15, 18, 24, 31, 38, 45, 53,
25, 19, 22, 28, 36, 45, 55, 65,
32, 24, 27, 33, 42, 53, 65, 77
},
{
/* An improved detection model for DCT coefficient quantization (1993) Peterson, Ahumada and Watson
* Copied from luma
*/
14, 10, 11, 14, 19, 25, 34, 45,
10, 11, 11, 12, 15, 20, 26, 33,
11, 11, 15, 18, 21, 25, 31, 38,
14, 12, 18, 24, 28, 33, 39, 47,
19, 15, 21, 28, 36, 43, 51, 59,
25, 20, 25, 33, 43, 54, 64, 74,
34, 26, 31, 39, 51, 64, 77, 91,
45, 33, 38, 47, 59, 74, 91, 108
} }
}; };