Win, K. T., and N. A. A. Htwe. “A Modified Quantization Based Image Compression Technique Using Walsh-Hadamard Transform”. International Journal of Computer (IJC), vol. 19, no. 1, Oct. 2015, pp. 79-90, https://www.ijcjournal.org/index.php/InternationalJournalOfComputer/article/view/468.