International Journal of Computational Linguistics Research Rumen P. Mironov 13 1 2022 https://doi.org/10.6025/jcl/2022/13/1/9-14 https://www.dline.info/jcl/fulltext/v13n1/jclv13n1_2.pdf A comparison of the developed complex Hadamard transform with the well-known unitary (orthogonal) transforms of Karhunen-Loeve, Fourier, Walsh-Hadamard and discrete cosine transform is presented. The comparison is made on the base of minimization of mean-squared error of reconstructed transform coefficients for two test images.