Novel Color-UNet++ architecture [5] uses linear combination of mean squared error (MSE), SSIM and PSNR as a loss function, which proved suitable for regression problem.  ...  That is the main reason for the extensive use and development of the grayscale image quality metrics. Most color image quality metrics are modified grayscale image quality metrics [23] .  ...  Author Name: Preparation of Papers for IEEE Access (February 2017) Author Name: Preparation of Papers for IEEE Access (February 2017) VOLUME XX, 2017  ...