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February 2004
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Archive maintained by AWare Systems
2004.02.16 09:54 "TIFF BUG: RGB gets swapped on YCBCR", by <kenneth.tjostheim@powelgemini.no>
I really don't know what is wrong, but I have some images that becomes BGR
instead of RGB. (Others are OK)
They are tiled and layered: 6400x2400 tile size 128x128
Could be I am not using it correctly but ???
Have tried to swap R with B and then they gets OK, but then others gets bad.
TIFFRGBAImageBegin()
{
....
switch (img->photometric) {
case PHOTOMETRIC_YCBCR:
if (planarconfig != PLANARCONFIG_CONTIG) {
sprintf(emsg, "Sorry, can not handle YCbCr images with %s=%d",
"Planarconfiguration", planarconfig);
return (0);
}
/* It would probably be nice to have a reality check here. */
if (planarconfig == PLANARCONFIG_CONTIG)
/* can rely on libjpeg to convert to RGB */
/* XXX should restore current state on exit */
switch (compress) {
case COMPRESSION_OJPEG:
case COMPRESSION_JPEG:
TIFFSetField(tif, TIFFTAG_JPEGCOLORMODE, JPEGCOLORMODE_RGB);
img->photometric = PHOTOMETRIC_RGB;
DEBUGGING GETS ME HERE
break;
default:
/* do nothing */;
break;
}
break;
}
tiffinfo CC038114.TIF
TIFFReadDirectory: Warning, e:CC038114.TIF: unknown field with tag 33918
(0x847e
) encountered.
TIFF Directory at offset 0x2003dc
Subfile Type: (0 = 0x0)
Image Width: 6400 Image Length: 4800
Tile Width: 128 Tile Length: 128
Resolution: 1000, 1000 pixels/cm
Bits/Sample: 8
Compression Scheme: JPEG
Photometric Interpretation: YCbCr
YCbCr Subsampling: 2, 2
Samples/Pixel: 3
Planar Configuration: single image plane
Reference Black/White:
0: 0 255
1: 128 255
2: 128 255
Tag 33918:
2,10,104,0,0,0,0,16425,0,0,0,0,0,0,0,0,0,0,21600,-16039,0,0,0,0,0,0
,0,16425,0,0,0,0,0,0,22138,16753,0,0,0,0,0,0,0,0,0,0,0,16368,0,0,0,0,0,0,0,0
,0,0
,0,0,0,0,0,0,0,0,0,16368,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0
,0,0
,0,0,0,0,0,0,0,0,0,0,0,0
JPEG Tables: (1722 bytes)
TIFFReadDirectory: Warning, e:CC038114.TIF: unknown field with tag 33919
(0x847f) encountered.
TIFF Directory at offset 0x291a58
Subfile Type: reduced-resolution image (1 = 0x1)
Image Width: 3200 Image Length: 2400
Tile Width: 128 Tile Length: 128
Resolution: 0.15625, 0.208333 pixels/cm
Bits/Sample: 8
Compression Scheme: JPEG
Photometric Interpretation: YCbCr
YCbCr Subsampling: 2, 2
Samples/Pixel: 3
Planar Configuration: single image plane
Reference Black/White:
0: 0 255
1: 128 255
2: 128 255
Tag 33919: 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0
JPEG Tables: (574 bytes)
TIFFReadDirectory: Warning, e:CC038114.TIF: unknown field with tag 33919
(0x847f) encountered.
TIFF Directory at offset 0x2be9b8
Subfile Type: reduced-resolution image (1 = 0x1)
Image Width: 1600 Image Length: 1200
Tile Width: 128 Tile Length: 128
Resolution: 0.15625, 0.208333 pixels/cm
Bits/Sample: 8
Compression Scheme: JPEG
Photometric Interpretation: YCbCr
YCbCr Subsampling: 2, 2
Samples/Pixel: 3
Planar Configuration: single image plane
Reference Black/White:
0: 0 255
1: 128 255
2: 128 255
Tag 33919: 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0
JPEG Tables: (574 bytes)
TIFFReadDirectory: Warning, e:CC038114.TIF: unknown field with tag 33919
(0x847f) encountered.
TIFF Directory at offset 0x2cc3ec
Subfile Type: reduced-resolution image (1 = 0x1)
Image Width: 800 Image Length: 600
Tile Width: 128 Tile Length: 128
Resolution: 0.15625, 0.208333 pixels/cm
Bits/Sample: 8
Compression Scheme: JPEG
Photometric Interpretation: YCbCr
YCbCr Subsampling: 2, 2
Samples/Pixel: 3
Planar Configuration: single image plane
Reference Black/White:
0: 0 255
1: 128 255
2: 128 255
Tag 33919: 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0
JPEG Tables: (574 bytes)
TIFFReadDirectory: Warning, e:CC038114.TIF: unknown field with tag 33919
(0x847f) encountered.
TIFF Directory at offset 0x2d0d1c
Subfile Type: reduced-resolution image (1 = 0x1)
Image Width: 400 Image Length: 300
Tile Width: 128 Tile Length: 128
Resolution: 0.15625, 0.208333 pixels/cm
Bits/Sample: 8
Compression Scheme: JPEG
Photometric Interpretation: YCbCr
YCbCr Subsampling: 2, 2
Samples/Pixel: 3
Planar Configuration: single image plane
Reference Black/White:
0: 0 255
1: 128 255
2: 128 255
Tag 33919: 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0
JPEG Tables: (574 bytes)
TIFFReadDirectory: Warning, e:CC038114.TIF: unknown field with tag 33919
(0x847f) encountered.
TIFF Directory at offset 0x2d25e4
Subfile Type: reduced-resolution image (1 = 0x1)
Image Width: 200 Image Length: 150
Tile Width: 128 Tile Length: 128
Resolution: 0.15625, 0.208333 pixels/cm
Bits/Sample: 8
Compression Scheme: JPEG
Photometric Interpretation: YCbCr
YCbCr Subsampling: 2, 2
Samples/Pixel: 3
Planar Configuration: single image plane
Reference Black/White:
0: 0 255
1: 128 255
2: 128 255
Tag 33919: 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0
JPEG Tables: (574 bytes)
TIFFReadDirectory: Warning, e:CC038114.TIF: unknown field with tag 33919
(0x847f) encountered.
TIFF Directory at offset 0x2d3040
Subfile Type: reduced-resolution image (1 = 0x1)
Image Width: 100 Image Length: 75
Tile Width: 128 Tile Length: 128
Resolution: 0.15625, 0.208333 pixels/cm
Bits/Sample: 8
Compression Scheme: JPEG
Photometric Interpretation: YCbCr
YCbCr Subsampling: 2, 2
Samples/Pixel: 3
Planar Configuration: single image plane
Reference Black/White:
0: 0 255
1: 128 255
2: 128 255
Tag 33919: 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0
JPEG Tables: (574 bytes)
TIFFReadDirectory: Warning, e:CC038114.TIF: unknown field with tag 33919
(0x847f) encountered.
TIFF Directory at offset 0x2d3904
Subfile Type: reduced-resolution image (1 = 0x1)
Image Width: 50 Image Length: 37
Tile Width: 128 Tile Length: 128
Resolution: 0.15625, 0.208333 pixels/cm
Bits/Sample: 8
Compression Scheme: JPEG
Photometric Interpretation: YCbCr
YCbCr Subsampling: 2, 2
Samples/Pixel: 3
Planar Configuration: single image plane
Reference Black/White:
0: 0 255
1: 128 255
2: 128 255
Tag 33919: 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0
JPEG Tables: (574 bytes)
TIFFReadDirectory: Warning, e:CC038114.TIF: unknown field with tag 33919
(0x847f) encountered.
TIFF Directory at offset 0x2d3ff4
Subfile Type: reduced-resolution image (1 = 0x1)
Image Width: 25 Image Length: 18
Tile Width: 128 Tile Length: 128
Resolution: 0.15625, 0.208333 pixels/cm
Bits/Sample: 8
Compression Scheme: JPEG
Photometric Interpretation: YCbCr
YCbCr Subsampling: 2, 2
Samples/Pixel: 3
Planar Configuration: single image plane
Reference Black/White:
0: 0 255
1: 128 255
2: 128 255
Tag 33919: 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0
JPEG Tables: (574 bytes)