SIMCA: Coded Aperture Snapshot Spectral Imaging (CASSI) Simulator

SIMCA is a package designed to perform optical simulations for Coded Aperture Snapshot Spectral Imaging (CASSI).

Installation

To install SIMCA, follow these steps:

1. Clone the repository:

git clone https://github.com/a-rouxel/simca.git
cd simca

2. Create and activate a dedicated Python environment using Miniconda:

conda create -n simca-env python=3.10
conda activate simca-env

3. Install the necessary Python packages:

pip install -r requirements.txt

Usage

SIMCA provides two main scripts for designing and analyzing CASSI systems:

Designing a CASSI System

Use the design_cassi.py script to optimize the design of a Snapshot Dispersive Coded Aperture Spectral Imaging (SD-CASSI) system:

python design_cassi.py --prism_type [amici|single] --output_dir <output_directory>

• --prism_type: Choose between "amici" or "single" prism system.
• --output_dir: Specify the directory to save the optimization results.

This script performs a two-step optimization process and generates performance metrics for the final optimized system.

Analyzing a CASSI System

Use the analyze_cassi.py script to analyze an existing SD-CASSI system caracteristics from a configuration file:

python analyze_cassi.py --input_dir <input_directory>

• --input_dir: Specify the directory containing the config_system.yml file to analyze.

This script will display the optical system configuration and performance metrics, and save visualization figures in the input directory.

License

SIMCA is licensed under the GNU General Public License.

Contact

For questions or feedback, please contact us at arouxel@laas.fr