Legacy ImageMagick Discussions Archive

Snibgo, isn't this similar to GIMP's Hue / Lightness / Saturation control?

convert -size 128x128 canvas:none canvas:#231F20 mask.png -composite output.png

Break the input png into page sized tiles using -crop, then output to pdf. Something like: There are many ways to crop and to position the tiles on the pages.

This is possible. You would have to -crop the image into tiles before saving the image as a pdf.

Try -layers composite or -draw image.

If it helps, I believe that an unspecified quality defaults to the original quality. What you ask may be possible somehow with the new support for escapes in settings. After all those changes, especially the resize, increasing the quality above the initial one will likely add visual quality. What do...

I understand what you are saying and that makes sense. I don't know if IM can do this (without a simple outside script). Are you otherwise modifying the images, or are you simply reading them in and writing them back out but possibly smaller?

To reduce the size of a jpeg without modifying the image data: First, toss out the non-image data (metadata) in the file. The thumbnail, camera settings, comment, etc. Second, redo the lossless compression step. Baseline (Huffman) encoding can be optimized, but often isn't because it is more process...

Oops, there is a bad link in the documentation (in the table of contents). Try
http://www.imagemagick.org/Usage/basics/#image_lists

A -resize, or any operation, applies to each and every image in the current list. Try ( )
http://www.imagemagick.org/Usage/basics/#image_list

A bug, but apparently fixed. Your version of IM is extremely old!

On second look, you were even closer. Did you forget the % (%% in Windows batch)? This is what I get on IM 6.8.5-6: > identify -format "[resolution.x]" SeedImage_9.jpg [resolution.x] > identify -format "%x - %[resolution.x] - %[fx:resolution.x]" SeedImage_9.jpg 72 PixelsPerInch -...

wfzimmerman wrote:identify -format "[resolution.x]" SeedImage_9.jpg

You were close. The fx expression should be:

identify -format "%[fx:resolution.x]" SeedImage_9.jpg

You can easily accomplish this on one command line using convert, no temporary files needed.

-resize and its geometry argument is very flexible. Try adding the shrink only flag convert image.png -trim +repage -resize 32x32 > -gravity center -background none -extent 32x32 result.png The > character may need to be quoted or escaped on your platform. For other flags see: http://www.imagemagick...