Figure 8
From: Prediction error preprocessing for perceptual color image compression
Results of coding the "Lena" color image at the JPEG quality factor of 85. (a) Original image, (b) reconstructed image ((PSNR = 35.29 dB, SSIM = 0.905, VIF = 0.893, VSNR = 41.68 dB, WSNR = 40.33 dB, PSNR-HVS-M = 44.18 dB, bit rate = 0.45 bpp) with the JPEG coding with the proposed preprocessor, and (c) reconstructed image (PSNR = 36.86 dB, SSIM = 0.921, VIF = 0.914, VSNR = 42.34 dB, WSNR = 41.88 dB, PSNR-HVS-M = 45.24 dB, bit rate = 0.54 bpp) with the conventional one.