A No-Reference Sharpness Metric Based on Structured Ringing for JPEG2000 Images
Figure 2
An example showing the obtaining of the preliminary ringing map. (a) 618 × 453 JPEG2000 image with a compression of 0.25079 bits/pixel. (b) The diffused image. (c) The preliminary ringing map calculated as the difference between the original image and the diffused image.
