Legacy ImageMagick Discussions Archive

But I might look into the GitHub releases thing. Thanks for the tip!

We only keep one copy of the Windows and Linux binary distribution. Right. What I'm asking is this: in addition to the copy that's named `ImageMagick-6.9 .1-10 -Q16-HDRI-x86-dll.exe`, can you also have a symlink to it with a stable name (url) like `ImageMagick-6.9- latest -Q16-HDRI-x86-dll.exe ...

I'm the principal maintainer for the "Images.jl" package for the Julia programming language. We wrap parts of `libmagickwand` for I/O. Our Windows users have episodically had problems installing our package, and usually these failures happen because it fails to download the appropriate ImageMagick ...

It looks like it works properly if I add after calling `MagickConstituteImage`. This seems to be different behavior than either the current version or the one shipped with Ubuntu 12.04, so it seems that it should still be viewed as a bug.

It's a grayscale image, won't that be problematic? (EDIT: meaning, if I then write the wand as an image file?)

That's great to hear it's working in the current version. I suspect upgrading mid-release from 6.7->6.8 will be too big of a leap for Ubuntu, so I'm grateful that you're also looking into what's wrong with their version.

Using the version of ImageMagick distributed with Ubuntu 14.04 (`8:6.7.7.10-6ubuntu3`), the following code #include <stdio.h> #include <stdint.h> #include <wand/MagickWand.h> /* uint8_t data[4] = {156, 230, 5, 238}; */ uint8_t data[4] = {0x9c, 0xe6, 0x05, 0xee}; int main() { printf("%d %d %d %d\n ...

If it's using 16-bit for each value, then you'd expect 8 bytes per pixel if it opens an R, G, B, and A channel for each image. That's quite different from 14.

Hmm, I realized there's another issue with the second question: if one wants to write an image that has both a gray channel and an alpha channel, that would seem to require two calls to convert. But the second call will overwrite the file produced by the first one, correct? Or is there a way to ...

...and yes, identify -verbose makes it clear that these are stored in the image separately. I just don't know how you ask for them directly.

To clarify, index/colormap refer to the following: let's say I have an RGB image, of size 800x600, that I've created with a drawing program. Because my drawing is not a full-realism painting, it actually only has 5 distinct colors in it. Rather than storing the RGB information for each pixel, I ...

I'd rather just get the gray values if it's a gray image.

But question 2 is not nearly as important as question 1; I can certainly live with two calls to convert to extract gray and alpha separately.

I'm using ImageMagick to import image data into Julia (a new programming language). I easily got the basics working, but I'm having some trouble with the more subtle issues: For indexed images (i.e., images with a colormap), I'd like to separately extract both the index and the colormap. I think I ...