S-Transform and T+S Transform of Wavelet Coefficients

Implementation of s-transform and t+s transform on wavelet coefficients, along with normalization techniques for transformed coefficients

Performing DCT Transformation with Zigzag-Order Coefficient Retention

Read a 256*256 image, divide it into 8*8 pixel blocks, apply DCT transformation to each block, retain specified coefficients in zigzag order, reconstruct the image using IDCT, and calculate the signal-to-noise ratio of the reconstructed output