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Hi,

I am having a weird issue and I would be keen to either get an explanation and a fix or an alternative method.

I have 2 directories from which I wish to combine pair of images with the same index. I have done that in the past without any issues until now.
This is typically the shell script I use

Code: Select all

#!bin/bash echo "$k items"
for i in $(seq -f "%05g" $1 $2 )
do
  File1=${3}${i}.jpg
  File2=${4}${i}.jpg
  FileOut=${5}${i}.png
  Command="convert +append "${File1}" "${File2}"  "${FileOut}
  echo $Command
  eval $Command
done

When I apply this to my current images, I systematically get an offset at the top left image.

What is weird is:
1) the images have the same height.
2) If I do not use the shell, but use the only command line to combine two images, the result is great.
3) I tried numerous way of combining the images including using montage. Combining two images not going though the shell script creates a great output while processing through the script fails and produces the offset.

Could someone provide a clue ?

Thanks Catherine

"+append" should come after the input images, not before.

Other than that, I can't see why the script should give a different result to a command-line.

What version IM are you using?

If the correct syntax doesn't cure the problem, please provide a pair of input images that show the problem, and the output. You can upload to somewhere like dropbox.com and paste URLs here.

I tried to shift the + append but the result is the same.

I tried on two machines one has ImageMagick-6.4.1 and the latest one.

The link to the images is:

https://www.dropbox.com/s/skqdmbx6biue1 ... t.jpg?dl=0
https://www.dropbox.com/s/omm5sv3kp3n6p ... e.jpg?dl=0

The usual output I get:
https://www.dropbox.com/s/zsue2krfsdk7j ... 4.png?dl=0

Thanks for having a look. Catherine

You won't get that output from those inputs with the command you showed.

As mentioned in my first message, if I run the command on two single figures, it indeed works perfectly. It only happens if I go through the shell script posted above for batch processing.

Your inputs are both 1920x1080 pixels, but your output is smaller, 1612x812 pixels. Those inputs didn't make that output with the command you showed.

I suspect the script isn't doing what you think it is doing.

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