Example of full-spectrum denoising results for a representative synthetic spectrum at four input signal-to-noise ratios (S/N = 5, 10, 15,  and 20). In each panel, the top plot displays the noise-free reference (blue), the noisy input (red), and the EUT-denoised output (cyan). The bottom plot shows the residuals relative to the noise-free spectrum for both the noisy input (red) and the denoised output (cyan). The legend indicates the rms residual for each case.