Image Quality Estimation for JPEG-Compressed Images without the Original Image
نویسندگان
چکیده
Methods for estimating JPEGcompressed image quality without the original image are investigated. Estimation of peak signalto-noise (PSNR) is calculated by utilizing the Laplacian nature of the image transform coefficients along with the quantization step size used to generate the image. Estimation of the Laplacian lambda () values are shown as well as improvements to the PSNR estimation that are achieved when compensating for large quantization step sizes. PSNR estimation using the ITU-T J.240 standard is also implemented.
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