Incoherent results for bUnwarpJ align depending on the number of CPUs

[lldelisle]

Dear developpers,
While I was working on the Galaxy wrapper for bUnwarpJ align I realized that I got really different results when I was restraining the number of CPUs using docker. See here on left the result with docker with --cpus 0 (no CPU restriction) and on the right with --cpus 1.

Steps to reproduce:

# Get docker image with fiji
 docker pull quay.io/biocontainers/fiji:20231211--h9ee0642_0
# Get input images
wget https://raw.githubusercontent.com/bgruening/galaxytools/refs/heads/master/tools/image_processing/imagej2/test-data/dotblot.jpg
wget https://raw.githubusercontent.com/bgruening/galaxytools/refs/heads/master/tools/image_processing/imagej2/test-data/dotblot.jpg
# Run bunwarpj-align
docker run --name test_docker -v $PWD:$PWD:rw -w $PWD --cpus 0 --rm --user 1001:1001 quay.io/biocontainers/fiji:20231211--h9ee0642_0 bunwarpj -align 'dotblot.jpg' 'NULL' 'blobs.gif' 'NULL' 0 2 1 0.0 0.0 1.0 10.0 'registered_source1_docker0cpus.png' 'registered_target1_docker0cpus.png'
docker run --name test_docker -v $PWD:$PWD:rw -w $PWD --cpus 1 --rm --user 1001:1001 quay.io/biocontainers/fiji:20231211--h9ee0642_0 bunwarpj -align 'dotblot.jpg' 'NULL' 'blobs.gif' 'NULL' 0 2 1 0.0 0.0 1.0 10.0 'registered_source1_docker1cpu.png' 'registered_target1_docker1cpu.png'