Just My Life & My Work

Posts tagged ‘lena’

峰值信號雜訊比 (Peak Signal to Noise Ratio)

通常在經過影像壓縮之後,輸出的影像通常都會有某種程度與原始影像不一樣。為了衡量經過處理後的影像品質,我們通常會參考PSNR值(峰值信號雜訊比 (Peak Signal to Noise Ratio))來認定某個處理程序是否令人滿意。來看Lena如何決定PSNR吧~

PSNR Lena

Denoising results using different methods in the DWT domain. (a) Clean image; (b) noisy image: PSNR=22.16 dB (σ=20); (c) denoised image using BiSrhink: PSNR=31.09 dB; (d) denoised image using ProbShrink: PSNR=31.00 dB; (e) denoised image using SURE-LET: PSNR=31.02 dB and (f) denoised image using the proposed method: PSNR=31.26 dB.

(繼續閱讀…)

標籤雲