Legacy ImageMagick Discussions Archive

It was my mistake, some assembly language that converts to 8bits per channel and premultiplies by alpha for display on windows had a bug. I was extracting bytes 0,2,4 and 6 when I should have taken bytes 1,3,5 and 7. This has no effect when an 8 bits per channel picture is converted to 16 bits, but ...

Has anything changed in the Magick Core API that could affect DrawGradientImage() and SparseColorImage(). I had them working a while ago but now they both produce complex fractal like patterns? I tried drawing a gradient on the command line and it worked OK with my version of IM, so it is probably s...

Is there any way to switch on, or a function that will expand % escapes in the Magick Core. They do not work in the PreviewImage() function the caption on the centre image shows them as literal text. I would also like them to be available in MontageImageList() or when assigning a Label to an Image. ...

I have just implimented the impressive MontageImageList(...) function in my Windows GUI for IM and have noticed that two of the entries in the MontageInfo structure have no effect these are mi->matte_color im->border_color This means that they have to be set in the individual Image structures. This ...

I am using ImageMagick-6.7.9-Q16 on Windows, the Magickcore interface. I am adding one function at a time to my GUI interface for IM, I am now working on Quantize. No matter what values I put into the QuantizeInfo structure (Colourspace, Treedepth etc.) the results of Quantize always appear lighter ...

I am buissy adding IM functions to my software and am working on Distort now, I am using the IM Core interface. I tried putting random values in a Perspective Projection Distortion and sometimes I had a crash and sometimes no results at all. I found that the crash was caused by using -ve values for ...

I am writing a Windows application which updates the screen in real time when doing certain tasks, e.g. painting on an image, moving sliders to alter brightness and moving a zoomed area around an image. At the moment this works well using 16 bit IM, although it does slow down when the displayed size...

What is the internal (ram) format of an HDR channel? I was reading about IM and HDR, in one place it says 'C double' which I understood to be 64 bits for this size, and further down the page it says '32 bits' which I thought was 'C float'. I am asking because I am including some fast single channel ...

I do not use Magick++, but use MagickCore for windows programming. But I had a similar problem although I do not know if this applies to you but here goes. My app uses Wide (2 byte) characters, IM uses multibyte characters. I do not know if the Magick++ wrappers take care of this but if not here is ...

Thank's I get it now. Heres a C++ code snippet double black=(double)GetPropertyN(o,1)*(double)(im->columns*im->rows); double white=(double)GetPropertyN(o,2)*(double)(im->columns*im->rows); if(status!=Status::STATUS_OK) goto quit; MagickBooleanType ok; WaitMessage(L"Stretching"); ok=LinearS...

I am trying to include LinearStretchImage(...) in my MagickCore program but can not work out what the black_point and white_point values should be. So far I have tried 0.0 to 1.0, 0 to 100, 0 to QuantumRange. I thought the function would work like this assuming the range were 0.0 to 1.0, when black_...

I have posted a .zipped folder on my web site which contains a very early version, probably very buggy, of a program that I am calling CZIM, because it will combine functionality from ImageMagick and my program CombineZ. I am asking if anyone is brave enough to test it on their system, so that I kno...

I am not an expert on crossplatform coding but the front end of my code is written in C#/.NET and is quite small. It asks the main .dll questions like "How many functions do you know?" then "Tell me about the first one", "...the second one"etc. Then it puts the info it ...

Just to update you all, here are a few things that I have managed to do so far, it will be a while yet before I have something for testing though. 1. A quad display of the images being processed that consists of two whole images in the lower two panes and an enlarged view of a portion of each in the...

Re. the CR2 problem, I had a sinilar problem with some test images I downloaded off the web, all I got when loading was a thumbnail of the full image, and an error message. A bit of detective work showed that there was an unrecognized tag in the file. My solution is to detect this and rename the .cr...