Color image dehazing using gradient channel prior and guided L0 filter

2020 ◽  
Vol 521 ◽  
pp. 326-342 ◽  
Author(s):  
Manjit Kaur ◽  
Dilbag Singh ◽  
Vijay Kumar ◽  
Kehui Sun
2016 ◽  
Vol 2016 ◽  
pp. 1-10 ◽  
Author(s):  
Bo Jiang ◽  
Wanxu Zhang ◽  
Jian Zhao ◽  
Yi Ru ◽  
Min Liu ◽  
...  

Combined with two different types of image dehazing strategies based on image enhancement and atmospheric physical model, respectively, a novel method for gray-scale image dehazing is proposed in this paper. For image-enhancement-based strategy, the characteristics of its simplicity, effectiveness, and no color distortion are preserved, and the common guided image filter is modified to match the application of image enhancement. Through wavelet decomposition, the high frequency boundary of original image is preserved in advance. Moreover, the process of image dehazing can be guided by the image of scene depth proportion directly estimated from the original gray-scale image. Our method has the advantages of brightness consistency and no distortion over the state-of-the-art methods based on atmospheric physical model. Particularly, our method overcomes the essential shortcoming of the abovementioned methods that are mainly working for color image. Meanwhile, an image of scene depth proportion is acquired as a byproduct of image dehazing.


2015 ◽  
Vol 23 (5) ◽  
pp. 1466-1473
Author(s):  
周理 ZHOU Li ◽  
毕笃彦 BI Du-yan ◽  
何林远 HE Lin-yuan

Author(s):  
Chen Feng ◽  
Shaojie Zhuo ◽  
Xiaopeng Zhang ◽  
Liang Shen ◽  
Sabine Susstrunk

Author(s):  
M. Suganthi ◽  
M. Surya Muthukumar

In real world scenario due to bad weather conditions the presence of fog and haze, the particles in the outdoor environment or atmosphere (e.g., droplets, smoke, sand, snow, mist, volcanic ash, liquid dust or solid dust) greatly reduces the visibility of the scene. As a consequence, the clarity of an image would be seriously degraded, which may decrease the performance of many image processing applications. Image Dehazing methods try to alleviate these problems by estimating a haze free version of the given hazy image. Traditionally the task of image dehazing can be processed as recovering the scene radiance from a noisy hazy image by estimating the atmospheric light and transmission properties. In those kinds of techniques, it additionally needs some more information regarding the image such as scene depth, weather condition parameters and so on. But this is not suitable for real world scenario. This research focus on proposing an approach to fully capture the intrinsic attributes of a hazy image and improves the performance of dehazing. Dark Channel Prior plays vital role in dehazing process. Hence this research focus on recovering dehaze version of the input image by CNN. So that all methods are comes under the categories image enhancement, image fusion image restoration based on statistical and structural features of the hazed image.


2019 ◽  
Vol 49 (12) ◽  
pp. 4276-4293 ◽  
Author(s):  
Dilbag Singh ◽  
Vijay Kumar ◽  
Manjit Kaur

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