Thomas, Sibu, and AK Shrivas. “Studyof Unsharp Masking and Contrast Limited Adaptive Histogram Equalization on CT Images of Emphysema”. International Journal of Computer Sciences and Engineering, vol. 7, no. 3, Nov. 2025, pp. 162-6, https://ijcse.isroset.org/index.php/j/article/view/4480.