An Improved Unsharp Masking Method for Palmprint Image Enhancement

2006 ◽  
Author(s):  
Yanxia Wang ◽  
Qiuqi Ruan
Keyword(s):  
Image Enhancement ◽  
Unsharp Masking

scholarly journals Image enhancement of nano-dispersed N-(p-n-decyloxybenzylidene)-p-n-hexyloxy aniline using combined unsharp masking

2016 ◽  
Vol 25 (4) ◽  
pp. 74-80 ◽  
Author(s):  
B. T. P. Madhav ◽  
P. Pardhasaradhi ◽  
P. V. V. Kishore ◽  
R. K. N. R. Manepalli ◽  
V. G. K. M. Pisipati
Keyword(s):  
Image Enhancement ◽  
Unsharp Masking

A remote sensing image enhancement method using mean filter and unsharp masking in non-subsampled contourlet transform domain

2016 ◽  
Vol 39 (2) ◽  
pp. 183-193 ◽  
Author(s):  
Lu Liu ◽  
Zhenhong Jia ◽  
Jie Yang ◽  
Nikola Kasabov
Keyword(s):  
Remote Sensing ◽  
Image Enhancement ◽  
High Frequency ◽  
Low Frequency ◽  
Remote Sensing Image ◽  
Contourlet Transform ◽  
Inverse Transformation ◽  
Unsharp Masking ◽  
Mean Filter ◽  
Enhancement Method

The intelligibility of an image can be influenced by the pseudo-Gibbs phenomenon, a small dynamic range, low-contrast, blurred edge and noise pollution that occurs in the process of image enhancement. A new remote sensing image enhancement method using mean filter and unsharp masking methods based on non-subsampled contourlet transform (NSCT) in the scope for greyscale images is proposed in this paper. First, the initial image is decomposed into the NSCT domain with a low-frequency sub-band and several high-frequency sub-bands. Secondly, linear transformation is adopted for the coefficients of the low-frequency sub-band. The mean filter is used for the coefficients of the first high-frequency sub-band. Then, all sub-bands were reconstructed into spatial domains using the inverse transformation of NSCT. Finally, unsharp masking was used to enhance the details of the reconstructed image. The experimental results show that the proposed method is superior to other methods in improving image definition, image contrast and enhancing image edges.

Parametric rational unsharp masking for image enhancement

2014 ◽  
Author(s):  
Changzhe Yin ◽  
Yicong Zhou ◽  
Sos Agaian ◽  
C. L. Philip Chen
Keyword(s):  
Image Enhancement ◽  
Unsharp Masking

Image enhancement algorithm based on generalized linear system and unsharp masking

2016 ◽  
Vol 31 (10) ◽  
pp. 973-982
Author(s):  
范日召 FAN Ri-zhao ◽  
何斌 HE Bin ◽  
刘燕君 LIU Yan-jun ◽  
李军凯 LI Jun-kai ◽  
陈洋君 CHEN Yang-jun
Keyword(s):  
Linear System ◽  
Image Enhancement ◽  
Unsharp Masking ◽  
Enhancement Algorithm ◽  
Generalized Linear System
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