A new approach to invisible water marking of color images using alpha blending

Author(s):  
Anirban Patra ◽  
Arijit Saha ◽  
Ajoy Kumar Chakraborty ◽  
Kallol Bhattacharya
Keyword(s):  
Measurement ◽  
2011 ◽  
Vol 44 (8) ◽  
pp. 1441-1447 ◽  
Author(s):  
Igor Zjakic ◽  
Djurdjica Parac-Osterman ◽  
Irena Bates
Keyword(s):  

1991 ◽  
Author(s):  
Raja Balasubramanian ◽  
Jan P. Allebach

Author(s):  
V. Durgarchana ◽  
B. Praveen ◽  
B. Sridhar

In this paper, we present the Adaptive Bilateral Filter (ABF) for sharpness enhancement and noise removal of a colour images. The ABF sharpens an image by increasing the slope of the edges without producing overshoot or undershoot. It is an approach to sharpness enhancement that is fundamentally different from the unsharp mask (USM). This new approach to slope restoration also differs significantly from previous slope restoration algorithms. Compared with an USM based sharpening method, the optimal unsharp mask (OUM), In terms of noise removal, ABF will outperform the bilateral filter and the OUM. ABF works well for both gray images and color images. Due to operation of sharpening of colour images along the edge slope tend to poseterize the image using ABF by pulling up or pulling down the colour images. The proposed method is effective at removing signal noise while enhancing the experimental results in perceptual quality both quantatively and qualitatively.


2012 ◽  
Vol 2 (5) ◽  
pp. 329-331
Author(s):  
G.S.Raman G.S.Raman ◽  
◽  
R.T.Subhalakshmi R.T.Subhalakshmi
Keyword(s):  

Author(s):  
OLIVIER MONGA

We present a new approach to the segmentation problem by optimizing a criterion which estimates the quality of a segmentation. We use a graph-based description of a partition of an image and a merging strategy based on the optimal use of a sequence of criteria. This method separates the strategy of making use of the segmentation criteria from their definition. An efficient data structure enables our implementation to have a low algorithmic complexity. Our method offers a general framework for solving a large class of segmentation problems. We show how to adapt this method to segment 2-D natural images including color images. This algorithm is also used for segmentation of 3-D images.


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