Legacy ImageMagick Discussions Archive

Hmm, it looks like I can't even add the alpha channel to my image wand. I tried this: image_wand_out = CloneMagickWand(image_wand_in); MagickSetImageAlphaChannel(image_wand_out,ActivateAlphaChannel); MagickSetImageAlphaChannel(image_wand_out,OpaqueAlphaChannel); without trying to destroy the alpha c...

I just went through the description of all Wand functions, and now have more specific questions. 1) Is Alpha manipulations all I need to achieve my goal? (So I don't need masks, channels, matte etc.). Specifically, if I create an alpha channel for my image, set my "signal" pixels to alpha=...

Thanks for the quick reply! I am only familiar with v6.x, so that's what I'm currently using. (I just compiled a 6.8 version with Q32 quantum range for this project.) I found a command line (not C API) IM example solving the same problem (blurring background); there they just made the fg pixels tran...

Hello, I am writing a C program to process my astrophotography images. I got the basics of Magick Wand programming (reading/writing the image; manipulation with pixel brightness values), but now I am lost trying to do a more advanced task. I wonder if anyone could point me in the right direction? Sp...

Is floating point pixels coordinates (get color via interpolation) feature supported by C API? Yes. I use InterpolateMagickPixelPacket(...), defined in pixel.h. This respects the -virtual-pixel and -interpolate settings. See examples in http://im.snibgo.com/customim.htm That's perfect - your link e...

I had very little experience with ImageMagick C API in the past, mostly by means of finding a similar example code and adopting it to my needs, but now I am trying to accomplish a project in which I don't even know if it is doable with ImageMagick, and don't know where to start. In short, I want to ...