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Changing specific color everwhere in image
Rank: Member
Groups: Member
Joined: 4/7/2007(UTC) Posts: 4
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Sorry for the simple questions, but I'm nearly done with my evaluation.... How do I change all occurrances of one RGB value to another? I'm a bit confused about whether palettes need to be used and how to create them if they don't exist. Tried this from a sample, but I get an error about operation requiring a palette. Code: Dim I As Integer
BitMapViewer.Bitmap.Data.ConvertTo8bppIndexed DitheringTypeNone, , , , , PaletteTypeGrayscale
BitMapViewer.Bitmap.ColorTreatment = ColorTreatmentColorref
BitMapViewer.AutoUpdate = False
For I = 1 To BitMapViewer.Bitmap.Data.Palette.Count - 2
BitMapViewer.Bitmap.Data.Palette(I) = RGB(I, I, 0)
Next
BitMapViewer.AutoUpdate = True
BitMapViewer.Refresh
Thanks again. Edited by user Monday, February 25, 2008 7:00:43 PM(UTC)
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Rank: Advanced Member
Groups: Member, Administration, Moderator Joined: 8/3/2003(UTC) Posts: 1,070
Thanks: 1 times Was thanked: 12 time(s) in 12 post(s)
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Hello, If you want to replace one color with another in an image, you should read color data from every pixel, and change it (if it is required). The fastest way to perform this task is to use direct access to pixel data. This approach is discussed in Accessing to Pixel Data article. Edited by user Tuesday, December 15, 2009 10:43:05 AM(UTC)
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