Legacy ImageMagick Discussions Archive

Hello guys,

with a current version of ImageMagick (6.9.10-56 Q16 x64 2019-07-21) I have following behavior. I convert this eps-file: https://people.sc.fsu.edu/~jburkardt/da ... matica.eps

using the convert program:
convert mathematica.eps mathematica.png

The result is that the graph is placed at the bottom to the left with a lot of white space above it. In our older version (6.8.9-8) we did not have this behavior.

Any ideas how I can avoid this behavior that the result will look like this image?
https://people.sc.fsu.edu/~jburkardt/da ... matica.png

Thanks
Viktor

Your PNG result looks fine to me. But when I use your command, it does get offset. I am using Ghostscript 9.25. What version of Ghostscript are you using?

You can use -trim to get rid of the excess.

Hi fmw42

The solution with -trim works fine, thank you!

Regards

OK, tested several images - the solution doesn't work as the image size differs much, based on the input image. Will try a newer version of ImageMagick.

In what way does it not work? Can you show an example where it does not work and what you would like to see.

Thanks for reply!

My test is very easy. I just convert an eps-File without any parameters:

convert mathematica.eps mathematica_6-8-9-8_Q16.png
convert mathematica.eps mathematica_7-0-8-57_Q16.png

The results can be found here:
https://drive.google.com/drive/folders/ ... sp=sharing

The older version does it correct, the newer one adds a lot of space above it.

I've tried with trim, but this doesn't work either:
convert mathematica.eps -trim mathematica_7-0-8-57_Q16_trim.png
The png has other dimensions that the one converted with 6.8.9-8 version.

Thanks for your help!

-trim will trim to the minimum bounding box of the object. I do not know what 6.8.9.8 did. So the resulting dimensions may be different.

I do not understand why the blank space is at the top. The dimensions of the file are clear from identify -verbose as 612x792. That is the size of the resulting PNG. There is no clip box or xmp profile to tell it otherwise. I can only surmise that the EPS has an embedded file, perhaps a PNG with a virtual canvas.

I think the IM developers will need to look at this further.

The rasterization is done by Ghostscript. What version of GS do you use? What is the GS command (run "convert" with "-verbose")?

The change occurred between 6.9.10.53 and 6.9.10.54. I tested both using GS 9.25

OK, so using 6.9.10.53 will solve the problem, right? We will try this option.

Thanks for your help!

6.9.10.53 worked for me on Mac OSX Sierra, but not 6.9.10.54

Using 6.9.10.57, identify -verbose says: Geometry: 612x792+0+0

But in 6.9.10.53 identify -verbose says: Geometry: 288x178+0+0

So something change in getting the file size from the same version of Ghostscript or how ImageMagick gets it from Ghostscript or reports it in identify -verbose.

Thanks for the problem report. We can reproduce it and will have a patch to fix it in GIT master branch @ https://github.com/ImageMagick/ImageMagick later today. The patch will be available in the beta releases of ImageMagick @ https://www.imagemagick.org/download/beta/ by sometime tomorrow.