References - etfovac/watermark GitHub Wiki In Serbian: Desanka Radunović Talasići za neupućene - Wavelets (basics) Wavelets Digital Watermarking – Comparison of DCT and DWT methods, ResearchGate Digital Watermarking in Wavelet domain – Comparison of different types of wavelets, ResearchGate In English: Rafael C. Gonzalez, Richard E. Woods. and Steven L. Eddins, Digital Image Processing Using MATLAB®, Prentice-Hall Inc, 2002.