[magick-users] Patch for Image Magick

[Manish Aggarwal]

Hello Maintainers,

>From last few days, we were trying to perform the chroma operation using Image Magick (IM) Package. For this operation, we need to pass two pixels one high and another low (RGB value of high pixel will be always greater than or equal to low pixel) and the concerned function should make all the pixel transparent that lie between the given range. As fuzz factor is defined for all three channels (which makes us difficult to pass different ranges for different channels ), we were not able to find any function (including transparent API) that can help us out. 

Thus we wrote our own functions (on the lines of transparent API). I am attaching the patch containing our function (for version 6.4.3-6), and wants to request to the maintainers that if they found this function useful/suitable please include it in the later releases of IM.

Thanks and Regards,
Manish Aggarwal
manish at circuitsutra.com

-------------- next part --------------
An embedded and charset-unspecified text was scrubbed...
Name: IM_6.4.3-6_Chroma_patch.txt
Url: http://studio.imagemagick.org/pipermail/magick-users/attachments/20081114/64cc4143/attachment.txt