Legacy ImageMagick Discussions Archive

I have an image which is converted to pixel cache format .mpc and then resized to 1600x1600 using the following commands

convert image.png pixelcache.mpc

convert pixelcache.mpc -resize 1600x1600\> resized.png

The resized.png image looks different in the latest version of imagemagick (v7.0.7-38). However, this works in older versions of imagemagick (v7.0.5-4).

https://drive.google.com/open?id=1Z3d1d ... BFD1dPu2Ta

-resize\>

Why do you have a ">"? That is bad syntax, in v6 and v7.

Perhaps you want -resize 1600x1600\> or "1600x1600>"

See http://www.imagemagick.org/script/comma ... p#geometry

This is the right command being used. The resized.png looks different from the original image.
convert pixelcache.mpc -resize 1600x1600\> resized.png

This one is a typographical error. I have edited my question.
convert pixelcache.mpc -resize\> 1600x1600 resized.png

balaprassanna wrote:... looks different ...

Please be more precise. In what way does it look different?

This is the resized file

https://drive.google.com/file/d/116JSf1 ... sp=sharing

If the mpc file comes from a different version of ImageMagick, it may not work on your current version. Also do you have the corresponding .cache file in the same location as the .mpc file?

The mpc file is being generated by the same version of imagemagick. Yes, i have the .cache file in the same directory as .mpc file. This is working in the older version v7.0.5-4

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 within a few days. The patch will be available in the beta releases of ImageMagick @ http://www.imagemagick.org/download/beta/ within a few days.

Can you explain what went wrong or share the changeset. So that we will have an insight if we face something similar again.

The problem was a bug in the PNG coder. The image attributes did not match the morphology of the image pixels.