No-reference image sharpness metric based on directional derivatives

2017 ◽  
Author(s):  
Jiye Qian ◽  
Hengjun Zhao ◽  
Jin Fu ◽  
Guojun He ◽  
Xingzhe Hou ◽  
...  
Keyword(s):  
Directional Derivatives ◽  
Reference Image ◽  
Image Sharpness ◽  
Sharpness Metric

scholarly journals A No-Reference Sharpness Metric Based on Structured Ringing for JPEG2000 Images

2014 ◽  
Vol 2014 ◽  
pp. 1-13 ◽  
Author(s):  
Zhipeng Cao ◽  
Zhenzhong Wei ◽  
Guangjun Zhang
Keyword(s):  
Edge Detection ◽  
Anisotropic Diffusion ◽  
Experimental Results ◽  
Reference Image ◽  
Image Sharpness ◽  
Ringing Artifacts ◽  
Sharpness Metric ◽  
Sharpness Metrics ◽  
Degraded Images

This work presents a no-reference image sharpness metric based on human blur perception for JPEG2000 compressed image. The metric mainly uses a ringing measure. And a blurring measure is used for compensation when the blur is so severe that ringing artifacts are concealed. We used the anisotropic diffusion for the preliminary ringing map and refined it by considering the property of ringing structure. The ringing detection of the proposed metric does not depend on edge detection, which is suitable for high degraded images. The characteristics of the ringing and blurring measures are analyzed and validated theoretically and experimentally. The performance of the proposed metric is tested and compared with that of some existing JPEG2000 sharpness metrics on three widely used databases. The experimental results show that the proposed metric is accurate and reliable in predicting the sharpness of JPEG2000 images.

A No-Reference Objective Image Sharpness Metric Based on a Filter Bank of Gaussian Derivative Wavelets

2011 ◽  
Vol 1 (2) ◽  
pp. 83-87
Author(s):  
Chengho Hsin ◽  
Jr-Wei Jang ◽  
Shaw-Jyh Shin ◽  
Shin-Hsien Chen
Keyword(s):  
Filter Bank ◽  
Image Sharpness ◽  
Gaussian Derivative ◽  
Sharpness Metric

An image sharpness metric for image processing applications using feedback

2007 ◽  
Author(s):  
Eric P. Lam ◽  
Christopher A. Leddy ◽  
Stephen R. Nash
Keyword(s):  
Image Processing ◽  
Image Sharpness ◽  
Sharpness Metric
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