Legacy ImageMagick Discussions Archive

The three numbers are the red, green, and blue intensities scaled from 0 .. 255 for that particular pixel.

Ok, we got reasonable results with this command:

• convert -size 110x110 1012405M.jpg -resize 110x110 +strip -quality 92 image.jpg

We're using this command with ImageMagick 6.2.6-5 and we got reasonable results:

• convert -size 200x200 1012405M.jpg -resize 200x200 image.jpg

To set the image compression quality call the quality() method with a value from 0 to 100.

Call matte(false) before you call the opacity().

Try the following:

• convert logo: logo.jp2
  compare -metric MSE logo: logo.jp2 logo.png

A 0db result confirms the compression is lossless.

The Group4-compression bug is scheduled to be fixed in the next point release. It should be available in the next 10 days.

You need to set the image compression to Group4Compression in order to produce a Group 4-compressed TIFF image.

To add PNG support to ImageMagick download the PNG delegate library and build/install. Next rerun the ImageMagick configure script and ensure the output of the script says it found the PNG delegate library.

Post a URL to one of your images and its corresponding thumbnail versions from your older version of ImageMagick and the new version. We need to see the results to account for any differences.

Try

• identify -list format

. Tiff should have a mode of rw-. Its possible in your case, ImageMagick is not finding its configuration files. Try

• convert -debug configure logo: logo.gif

and see where ImageMagick is looking for its configuration files and if it finds them.

To convert TIFF to JPEG, type

• convert image.tiff image.jpg

Of course the command will only work if you have ImageMagick installed and it was built with support for TIFF and JPEG.

ImageMagick requires the optional PNG delegate library to read/write PNG. Type

• identify -list format

on both machines. Chances are on the one that fails, it does not mention PNG with a mode of rw-. If so, rebuild the distribution and ensure PNG support is noted after you run the configure script.

We'll need a URL to the Airconditioner.ttf font.

You can always add compression to reduce the image size. Try

• convert -density 150x150 image.bmp -compress rle image.ps
  convert -density 150x150 image.bmp -compress zip ps2:image.ps
  convert -density 150x150 image.bmp -compress zip ps3.image.ps