Convert a Color image to black and white image, and retain the red color

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This topic and its replies were posted before the current version of LEADTOOLS was released and may no longer be applicable.

#1 Posted : Wednesday, March 28, 2012 7:43:22 AM(UTC)

URso5

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Posts: 6

I want to convert a Color image to black /white,and keep the red color,is there a function to do this? thanks

my leadtools is V16.5


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#2 Posted : Thursday, March 29, 2012 7:10:22 AM(UTC)

Daoud

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Posts: 256

Hello,
This can be done by doing the following:
1) Define a region for all non-red pixels in the image.
If you're using .NET, this can be done with the AddColorToRegion(), AddColorRgbRangeToRegion() or AddColorHsvRangeToRegion() functions, with the RasterRegionCombineMode.SetNot flag.
2) Apply the Auto Binarize function to the image, which will only affect the region, making all non-red pixels either black or white.

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