How to change bitmap PixelFormat to PixelFormat.Format1bppIndexed

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Hello Sir,

How do i convert any pixel format of bitmap to PixelFormat.Format1bppIndexedbitmap

Thanks and Regards

Posted 6-Jun-12 23:48pm

yeshgowda

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MuhtarQong · Accepted Answer · 2012-06-07T05:56:00

Lets say you have an RGB image. This image has three channels Red, Green and Blue.
1) First, using RGB pixel value to compute a value (for example Gray value):
Gray=0.3*Red+0.59*Green+0.11*Blue;
2) Compare the calculated Gray value with a threshold value (for example threshold=128).
3) If (Gray > threshold) set that pixel's value as 1 (true), if (Gray <= threshold) set that pixel's as 0 (false).
4) Note that 8 pixels of the gray scale (or RGB) image must be set in a single pixel in the Format1bppIndexed image by doing the above process.

Regards,