CosmoSim Roulette Resimulation Test

• Directory Test/roulettegen

Given a dataset as CSV, this test

1. generates images
2. generates a new CSV file including roulette amplitudes,
3. generate motages of the original and reconstructed images as well as the difference image in the montage/ directory.
4. compares the images calculating the Euclidean image for different concentric neighbourhoods around the origin.

Test Script

cd Test/roulettegen
make clean
sh test.sh
```

The test script compares the original roulette simulation
with the resimulation.  
Output image collages is found in the `montage` directory.

### Makefile

cd Test/roulettegen make montage.log

The makefile compares the roulette resimulation
with raytrace simulation.
Output image collages is found in the `montage` directory.

### Old notes

The output is a mess, but it is standardised for many different tests.
If one uses the text log, one should look for the string 
`maskedCompare` which appears once for each data point,
like this.

maskedCompare (600, 600, 3) diff/image-s003.png(10): 0.049611466296889374 (47.18050444834179); size=951.0 diff/image-s003.png(20): 0.02648499649355367 (99.87492177719089); size=3771.0

Each row is the comparison of one neigbourhood in the form

imagefile(radius): relative distance (distance): size ``` Here the size is the size of the neighbourhood, the distance is the Euclidean distance between the original and the reconstructed neighbourhood, and relative distance is disance divided by size.

Note on resuts and TODO

The current version (develop branch 3 July 2024) uses only the --xireference option, which is also what has been used in the machine learning tests. As of March 2025 --xireference is the default; it can be turned off with --no-reference. The role and importance of this option needs documentation.

If --no-xireference is used without --centred, the roulette amplitude output is predominantly NaN values. I do not know why. This should also be documented, and it may be a good idea to remove options.