View Issue Details
|ID||Project||Category||View Status||Date Submitted||Last Update|
|0010996||Scribus||public||2012-08-03 03:58||2012-08-04 12:14|
|Summary||0010996: PDF intended for print - RGB image with image effect (grayscale or colorize) converts to cmyk incorrectly|
|Description||When exporting to a pdf with the intended for "printer" selected the RGB images with an effect like colorize or grayscale are darkened. There is no problem with intended for "screen".|
|Tags||No tags attached.|
Duplicate of 0004270.
Image effects are currently applied after color management. When an RGB image is exported to RGB, the effect is applied in RGB colorspace. All is ok. But when an RGB image is exported to CMYK, the image is first converted to CMYK then effect is applied in CMYK colorspace, which can lead to somewhat different result.
In any case, one can not expect RGB to CMYK conversion to systematically preserve colors : the full RGB color range cannot be achieved in CMYK. ICC profiles implement gamut mapping strategy depending on color management settings used. The gamut mapping may in particular not preserve the color luminosity. Try to modify the rendering intent used in color management preferences : "Perceptual" and "Relative colorimetric" is what usually allow to get the best result.
|2012-08-03 03:58||kentonr||New Issue|
|2012-08-04 11:00||jghali||Note Added: 0028755|
|2012-08-04 11:00||jghali||Relationship added||duplicate of 0004270|
|2012-08-04 11:00||jghali||Status||new => resolved|
|2012-08-04 11:00||jghali||Resolution||open => duplicate|
|2012-08-04 11:00||jghali||Assigned To||=> jghali|
|2012-08-04 11:00||jghali||Status||resolved => closed|
|2012-08-04 12:14||jghali||Note Edited: 0028755|