This repository contains the optimization algorithm implemented in "Salazar et al., Coded Aperture Optimization in Spatial Spectral Compressive Spectral Imagers".
The original paper can be downloaded from https://ieeexplore.ieee.org/document/9034153. Please cite this paper if used. The cost function can be seen below 
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For details about the derivation process please refer to the original paper. A detailed explanation of the uploaded files can be seen below:
exe: Main file.
evaluation_2_blue_fin: Function that executes the principal algorithm
ct_fn: Calculation of the first and second terms, EQ. (22)
ct_fn_ver: Calculation of the thrid term, EQ. (22)
ct_fn_2_opt_2: Calculation of the first and second terms, EQ. (22) for a single iteration
example: Implementation of the optimization for a given scenario. Plots the evolution of the cos function and also the patterns after each iteration
my_bool: Creates an array of matrices with boolean complementary codes (see restiction on Eq. (22)).
The figure below shows the evolution of the patterns over the iterations:
@article{salazar2020coded, title={Coded aperture optimization in spatial spectral compressive spectral imagers}, author={Salazar, Edgar and Arce, Gonzalo R}, journal={IEEE Transactions on Computational Imaging}, volume={6}, pages={764--777}, year={2020}, publisher={IEEE} }