Bug 695266

Summary:	CMYK TIFF (both 8 bit and 16 bit per component) output gives wrong colors
Product:	Ghostscript	Reporter:	Till Kamppeter <till.kamppeter>
Component:	Color	Assignee:	Michael Vrhel <michael.vrhel>
Status:	RESOLVED WORKSFORME
Severity:	normal	CC:	robin.watts
Priority:	P4
Version:	9.14
Hardware:	PC
OS:	Linux
Customer:		Word Size:	---
Attachments:	launch_leaflet.pdf CityMap.pdf

Description Till Kamppeter 2014-05-28 01:38:16 UTC

Converting a PDF file to 8-bit-per-componen or 16-bit-per-component CMYK TIFF gives wrong colors, whereas RGB TIFF comes out correctly.

Command lines giving the problem:

cat ~/Documents/launch_leaflet.pdf | /usr/bin/gs -dQUIET -dPARANOIDSAFER -dNOPAUSE -dBATCH -dNOINTERPOLATE -sDEVICE=tiff64nc -sstdout=%stderr -sOutputFile=../cmyk16g.tiff -r100x100 -dDEVICEWIDTHPOINTS=612 -dDEVICEHEIGHTPOINTS=792 -_

Problem also happens with 8-bit CMYK (-sDEVICE=tiff32nc) and not with RGB (-sDEVICE=tiff48nc).

Sample files attached, but the problem probably shows also with any other file.

I did this test because of bug 695264 but probably they are not the same.

Comment 1 Till Kamppeter 2014-05-28 01:39:38 UTC

Created attachment 10938 [details]
launch_leaflet.pdf

File causing the problem.

Comment 2 Till Kamppeter 2014-05-28 01:40:28 UTC

Created attachment 10939 [details]
CityMap.pdf

Another file causing the problem.

Comment 3 Michael Vrhel 2015-10-28 12:15:29 UTC

I don't see any color issues with these files.  Rendering to TIFF CMYK and opening with an application that understands color management (e.g. Adobe Photoshop) and comparing to Acrobat Reader the colors look the same.  If you want to reopen this, I would suggest a screen shot.