Bug 692273 - Dithering on grayscale output devices from color PDF
Summary: Dithering on grayscale output devices from color PDF
Status: RESOLVED FIXED
Alias: None
Product: Ghostscript
Classification: Unclassified
Component: Color (show other bugs)
Version: 9.02
Hardware: PC Windows Vista
: P4 normal
Assignee: Michael Vrhel
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2011-06-09 23:58 UTC by Robert Cicconetti
Modified: 2011-11-04 05:07 UTC (History)
1 user (show)

See Also:
Customer:
Word Size: ---

Attachments
8.63 output, page 22 of PDF (334.73 KB, image/png)
2011-06-09 23:59 UTC, Robert Cicconetti 		Details
9.02 output, page 22 of PDF (177.08 KB, image/png)
2011-06-09 23:59 UTC, Robert Cicconetti 		Details
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Description Robert Cicconetti 2011-06-09 23:58:27 UTC 
Source PDF:
http://www.archive.org/download/margaretvincentn00clifiala/margaretvincentn00clifiala.pdf

Command line:
gs -dNOPAUSE -dSAFER -dBATCH -sDEVICE=pnggray -sOutputFile=%03d.png -r300 -dFirstPage=20 -dLastPage=20 ../margaretvincentn00clifiala.pdf

Version 9.02 amd64 precompiled binaries for windows.

When outputting to pnggray (or tiffgray) outputs, the background color of the PDF is rendered as a dither. dBitsPerPixel, dGraphicsAlphaBits, dTextAlphaBits settings had no apparent effect.

8.63 outputted a smooth, low resolution background.
Comment 1 Robert Cicconetti 2011-06-09 23:59:22 UTC 
Created attachment 7585 [details]
8.63 output, page 22 of PDF
Comment 2 Robert Cicconetti 2011-06-09 23:59:50 UTC 
Created attachment 7586 [details]
9.02 output, page 22 of PDF
Comment 3 Michael Vrhel 2011-11-04 05:07:56 UTC 
This has been fixed with 2b91a85069d421465220a83c82ea491733d15017 and
65486b6c7533f0be9e15a8380729fdb5032e0bef.