Rank: Newbie
Groups: Guest
Joined: 5/8/2017(UTC)
Posts: 5
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Hi All, using latest 9.1.5 version trying to convert from RGB to Grayscale 8bit using colormanagement , and apply Grayscale ICC profile But I'm getting the exception. Please advice what is wrong, and how to reach the required? Code:
img.ColorManagement.ColorManagementEngine= ColorManagementEngine.LittleCms;
if (img.ColorProfile == null)
img.ColorProfile = new ColorProfile("AdobeRGB1998.icc");
img.ColorManagement.DestinationProfile = new ColorProfile("dot_grain20.icc");
img.ColorManagement.Convert(PixelFormat.Format8bppGrayscale);
---->
The profile doesn't match to color space required.
at Aurigma.GraphicsMill.GMException.ThrowManagedException(IntPtr unmanagedException)
в Aurigma.GraphicsMill.PipelineElement.RunPipeline()
в Aurigma.GraphicsMill.Pipeline.Run()
в Aurigma.GraphicsMill.ColorManagementProvider.Apply()  Profiles.zip (2kb) downloaded 6 time(s).Edited by user Monday, May 8, 2017 6:58:35 AM(UTC)
| Reason: formatting
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Rank: Advanced Member
Groups: Guest
Joined: 7/28/2003(UTC)
Posts: 1,660
Thanks: 5 times
Was thanked: 76 time(s) in 74 post(s)
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I successfully converted RGB to CMYK using the attached color profiles: Code:var img = new Bitmap("../../../Chicago.jpg");
img.ColorManagement.ColorManagementEngine = ColorManagementEngine.LittleCms;
if (img.ColorProfile == null)
img.ColorProfile = new ColorProfile("../../../AdobeRGB1998.icc");
img.ColorManagement.DestinationProfile = new ColorProfile("../../../dot_grain20.icc");
img.ColorManagement.Convert(PixelFormat.Format8bppGrayscale);
img.Save("../../../Chicago_gray.jpg");
Are you sure that the bitmap ( img) has the RGB color space?   Edited by user Monday, May 8, 2017 9:30:16 AM(UTC)
| Reason: Not specified |
Best regards,
Fedor Skvortsov
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Rank: Newbie
Groups: Guest
Joined: 5/8/2017(UTC)
Posts: 5
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it appeared to be my bug, i really had greyascale as input
thanks for help
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