Colorimetric characterization of color imaging systems using a multi‐input PSO‐BP neural network

• Published in: Color research and application Vol. 47; no. 4; pp. 855 - 865
• Main Authors: Liu, Lu, Xie, Xufen, Zhang, Yuncui, Cao, Fan, Liang, Jing, Liao, Ningfang
• Format: Journal Article
• Language: English
• Published: Hoboken, USA John Wiley & Sons, Inc 01.08.2022; Wiley Subscription Services, Inc
• Subjects: Algorithms; Artificial neural networks; Back propagation; Back propagation networks; BPNN; Cameras; Color; color imaging system; colorimetric characterization; Colorimetry; Machine learning; Neural networks; Optimization; Particle swarm optimization; Regression models
• ISSN: 0361-2317; 1520-6378
• DOI: 10.1002/col.22772

Most commonly used camera characterization methods do not use a deep learning‐based artificial neural network approach at present. This article proposes a colorimetric characterization method for color imaging systems based on the multi‐input particle swarm optimization backpropagation neural network. Combined with a particle swarm optimization algorithm for global search and a 19‐input vector, this method not only overcomes the effects of local extrema on the multi‐input backpropagation neural network, but also improves the accuracy of the common input backpropagation neural network. Images of a ColorChecker SG chart were collected using a Canon EOS 1000D camera for experimental verification, and the color differences were used to evaluate the characterization results. The results show that the color differences of the multi‐input particle swarm optimization backpropagation neural network (structure: 19‐7‐3) model are substantially better than those of the multi‐input backpropagation neural network (structure: 19‐7‐3) and common input backpropagation neural network (structure: 3‐4‐3) models. Its performance is close to that of the weighted nonlinear regression model. The multi‐input particle swarm optimization backpropagation neural network is hence an effective method for colorimetric characterization with good prediction accuracy.