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February 2012

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2012.02.22 08:22 "Creating a CMYK tiff", by Dan Claudiu Zaharescu

2012.02.22 19:56 "Re: Creating a CMYK tiff", by Andreas Kleinert

2012.02.22 20:33 "Re: Creating a CMYK tiff", by Igor Skochinsky

2012.02.22 23:30 "Re: Creating a CMYK tiff", by <pullmoll@t-online.de>

2012.02.23 02:02 "Re: Creating a CMYK tiff", by Bob Friesenhahn

2012.02.23 07:12 "Re: Creating a CMYK tiff", by Dan Claudiu Zaharescu

2012.02.22 20:33 "Re: Creating a CMYK tiff", by Igor Skochinsky

Hello Dan,

Wednesday, February 22, 2012, 9:22:29 AM, you wrote:

dcz> Hello all,

dcz> TIFFSetField(image, TIFFTAG_SAMPLESPERPIXEL, 4);
dcz> /* When I use separate plans, the tiff cannot be opened, but I
dcz> don't think contig is good here!! */
dcz>  //TIFFSetField(image, TIFFTAG_PLANARCONFIG, PLANARCONFIG_SEPARATE);
dcz>  TIFFSetField(image, TIFFTAG_PLANARCONFIG, PLANARCONFIG_CONTIG);

It's been a while since I worked with this, but from what I remember,
none of the common viewers supported planar CMYK. If you want
max compatibility, you'll have to pack your pixels 4 colors per
sample.

dcz> Now, I have 4 buffers of LZW data:

Where do these buffers come from? If you don't have raw buffers, you'll
have to unpack them first and reshuffle the data.

-- 
WBR,
 Igor                            mailto:skochinsky@mail.ru