T., A. ., and A. C. S. . Jini. “A Comparative Study of HARR Feature Extraction and Machine Learning Algorithms for Covid-19 X-Ray Image Classification”. International Journal on Recent and Innovation Trends in Computing and Communication, vol. 11, no. 6s, June 2023, pp. 475-82, doi:10.17762/ijritcc.v11i6s.6955.