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This paper presents a new method for enhancement of the visual quality of compressed video sequences. The algorithm reduces coding artifacts and enhances sharpness of image details using combined filtering that ensures low implementation cost and high quality. Parameters of the combined bilateral filter are controlled by a block grid visibility metric, local entropy value, and dynamic range of pixel...
The spectrum of an image can be split into a number of frequency bands by taking the differences of the low-pass filtered versions of the original image. The visual quality of an image can be improved by manipulating different frequency bands of the image. Amplifying certain frequency bands would enhance the sharpness/contrast of the image; and suppressing certain frequency bands would reduce noise/coding...
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