Legacy ImageMagick Discussions Archive

I've decided to throw in the towel. Right now I am mainly just displaying the images in a Web browser, so it doesn't really matter whether the file is 32 bits or 8 bits with a transparency index as long as it looks the same. I was hoping for a single, consistent output format - the images may be imp...

OK, I determined by carefully examining the images that ImageMagick is dropping to 8-bit paletted images whenever the source image has fewer than 256 unique colors (regardless of the bit depth).

I'd much rather it always outputted a 32-bit image, but don't know how to get it to do that.

Sorry about that. Here's the file name of the installer I used: ImageMagick-6.6.7-4-Q16-windows-x64-static.exe In the mean-time, you could try prefacing your output image with PNG32:yourimagename.png and see if that helps. Just tried this, but the images don't get written to the output directory. In...

I'm using the following script to convert a directory full of images such that the blue background color is replaced with transparency. convert "images_mecha_big_dithered\aer_bee1.png" -alpha set -channel RGBA -depth 8 -fill none -opaque blue "images_mecha_big_dithered\alpha\aer_bee1....

OK, thanks for your help.

There is a problem with alpha channels when creating ICO files. The alpha channels are being reversed. The problem is discussed in this thread, starting with the 8th post. In particular, see anthony's post on page 2, as he has created a test case. I'll quote him here: If it is then yes. With (small)...

The version I have supercedes 6.4.3-7 doesn't it? So, I should go ahead and file a bug report, right?

However, there were quite some changes going on in IM 6.4.4.-7 regarding -alpha. see changelog http://www.imagemagick.org/script/changelog.php and also Controlling Transparency on http://www.imagemagick.org/Usage/basics/ I don't see a change log for 6.4.4.-7. Check with the latest version of Im to ...

Note also that the GIMP provides users with several options regarding colordepth and compression for each frame of the file.

Another problem related to the reversed alpha issue I mentioned above is that, after inverting the alpha channel, the "thumbnail preview" of the icon shows only the mask (or, rather the image with the inverse of the alpha channel applied to it). Not inverting the alpha channel results in t...

The icons use the PNG format, not GIF. I've tried "-compress Zip" and "-compress Lossless", but neither have an effect on the file size. The input file (a compressed PNG file--the second image in the above post) is ~76KB; the output file (an Windows icon) is ~265KB. Incidentally,...

I updated to the latest version of IM and the problem no longer exists. However, one oddity is that I have to reverse the alpha channel of the input images before converting them to icons. Here's the command-line I used: convert fate_abomination_256.png fate_abomination_048.png fate_abomination_032....

When creating Windows icons there is a strange border surrounding the image. Here is an example of what it looks like: http://img208.imageshack.us/img208/2096/abominationfateerrorkj4.png Here is what it's supposed to look like: http://img144.imageshack.us/img144/8830/abominationfategoodyl9.png Can s...

Update: I was able to save as TIFF with multiple frames. The GIMP then asks if I want to convert each frame to a layer when I open the TIFF file.

Still, being able to save directly to an layered image would be a time-saver.

Hi! I'm trying to create some layered images in a format that supports layers and is readable by the GIMP. I've tried PSD, MNG and TIFF, but the PSD images comes out all garbled and the MNG and TIFF images are flattened. Writing to XCF (GIMP native format) doesn't seem to be supported by ImageMagick...