Chen, Jia, et al. “Fine-Grained Detection of Caged-Hen Head States Using Adaptive Brightness Adjustment in Combination With Convolutional Neural Networks”. International Journal of Agricultural and Biological Engineering, vol. 16, no. 3, Aug. 2023, pp. 208-16, https://ijabe.migration.pkpps03.publicknowledgeproject.org/index.php/ijabe/article/view/7507.