Legacy ImageMagick Discussions Archive

many thanks for your support!!!

Many thanks for your reply.
I still have few questions

1. how we know that black_dif.png with transparency?? is it I use Compare to find the difference??
2. I tried the below command with -alpha off , just want to make sure my understanding is correct

convert c:\black_diff.png -transparent ...

Hi All,

I use the command to find the difference between the below 2 images

https://photos.app.goo.gl/HzrdYycdhgbBacZ19
https://photos.app.goo.gl/9ckbkprJwezqDCJM7

Compare -compose src c:\black1.png c:\black2.png c:\black_diff.png

the below is the output image
https://photos.app.goo.gl ...

many thanks for support, it works perfectly, thanks again

thanks for your help.

I tried to output the difference to image file

convert c:\QG1.pdf null: c:\QG2.pdf -compose Difference -layers composite c:\diff.png

and then convert that image file to txt file with ("-transparent black") and ("sparse-color:")

convert c:\diff.png -transparent white ...

Hi all,

I am new to ImageMagicK

I use the below command to compare 2 pdf files and generate the difference to the text file.

convert c:\QG1.pdf null: c:\QG2.pdf -compose Difference -layers composite c:\diff.txt

but the output text file size is very large, sometimes over 200m bytes.
I look into ...