Legacy ImageMagick Discussions Archive

Would be helpful if the category was shown on the command line, i.e., Agreed. Grab the source to the command line option web page, make your edits, and post the updates here and we will get it into the main ImageMagick web site. ImageMagick is a community project and depends on users like yourself ...

Would be nice it the documentation stated the type for each command

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We agree-- oh wait we've already done that, RTFM: http://www.imagemagick.org/script/comma ... hp#setting

You can use MagickLib::GetNumberColors() to write the image histogram to a file or you can iterate over the image pixels and create the histogram yourself.

Use the filterType() method to specify the filter type to be used when resizing an image.

Your Postscript has CMYK colors so it's rendered with a CMYK device rather than an alpha device. However, with the latest ImageMagick release, 6.2.6-6, we got the desired result by forcing an alpha device as follows: convert -colorspace rgb clipart.eps transparent.gif 6.2.6-6 will mirror world-wide ...

The -filter option is a setting not an operator. It is required before the -resize option.

Looks like a bug and we have a patch already. Look for an update in the next point release.

The -comment option is a setting, whereas, -set is an operator. Use this command:

• convert input.png -strip -set comment "some new comment" output.png

Use this command to resize your image:

• convert C:\tiscali.gif +matte -thumbnail 40x40 C:\tiscali_sm.gif

To convert a 30x512 image to 512x512, use this example:

• convert image.jpg -resize 512x512! resize.jpg

ImageMagick supports transparent Postscript to GIF if you have a modern version of ImageMagick and the file only contains one page and there is a DSC comment within the file specifying a language level of 2.

The image attributes have defaults, like the default bordercolor. For image operators you need to specify a parameter. Most of the kernel operators will choose a good radius and sigma for the kernel if the parameter is 0x1 (e.g. -unsharp 0x1).

You can display an image directly with the DisplayImage() method (depends on the language interface) but it does require an X11 server.

Use the -morph option to add in-between frames to your image sequence.

You need to add the -composite option to tell ImageMagick to composite the text over the image.