-
Notifications
You must be signed in to change notification settings - Fork 0
/
Copy pathUnderwater.html
74 lines (74 loc) · 3.39 KB
/
Underwater.html
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN"
"http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en">
<head>
<meta name="generator" content="jemdoc, see http://jemdoc.jaboc.net/" />
<meta http-equiv="Content-Type" content="text/html;charset=utf-8" />
<link rel="stylesheet" href="jemdoc.css" type="text/css" />
<title>Research Details</title>
</head>
<body>
<table summary="Table for page layout." id="tlayout">
<tr valign="top">
<td id="layout-menu">
<div class="menu-category">menu</div>
<div class="menu-item"><a href="index.html" class="current">Home</a></div>
<div class="menu-item"><a href="research.html">Research</a></div>
</td>
<td id="layout-content">
<div id="toptitle">
<h1>Research Details</h1>
</div>
<p>Catalogue:</p>
<ol>
<li><p><a href="Underwater.html">Underwater Image Enhancement with a Total Generalized Variation Illumination Prior</a></p>
</li>
<li><p><a href="SF6.html">The Design and Realization of Methane and Carbon Dioxide Infrared Gas Sensors (SRTP)</a></p>
</li>
<li><p><a href="Modeling.html">Design of Thermal Protective Clothing Based on Heat Conduction Partial Differential Equation Model 09/2018 (China Undergraduate Mathematical Contest in Modeling)</a></p>
</li>
</ol>
<h2>Underwater Image Enhancement with a Total Generalized Variation Illumination Prior [<a href="underwater.pdf">pdf</a>]</h2>
<h3>Purpose</h3>
<p>High-quality underwater images are of great significance for human exploration and excavation. There are two interfering factors:</p>
<ol>
<li><p>Low contrast and atomization -> underexposed and blurry</p>
</li>
<li><p>Color deviation -> bluish or greenish <br /></p>
</li>
</ol>
<p>We designed a variational model based on Retinex to address these two issues.</p>
<h3>Method</h3>
<p>Three steps to promote the quality of underwater images:</p>
<table class="imgtable"><tr><td>
<img src="underwater_figure1.jpg" alt="alt text" width="500px" height="170px" /> </td>
<td align="left"></td></tr></table>
<ol>
<li><p>Color correction</p>
</li>
<li><p><tt><b>Retinex-based decomposition with a total generalized variation prior</b></tt></p>
</li>
<li><p>Post-processing</p>
</li>
</ol>
<p>In step2, Retinex algorithm is applied to decompose the reflection and illumination. Following the nature of the illumination, the total generalized variation (TGV) prior is introduced to the illumination:</p>
<table class="imgtable"><tr><td>
<img src="underwater_figure2.jpg" alt="alt text" width="300px" height="70px" /> </td>
<td align="left"></td></tr></table>
<p>To solve the proposed model, a high-efficiency iterative optimization scheme is designed and implemented by Matlab. The scheme can be summed up in <b>Algorithm 1</b> and <b>Algorithm 2</b>.</p>
<table class="imgtable"><tr><td>
<img src="underwater_figure3.jpg" alt="alt text" width="300px" height="300px" /> </td>
<td align="left"></td></tr></table>
<h3>Experiments</h3>
<p>We carried out plenty of experiments are carried out and evaluate the enhanced images from two points: <b>visual effect</b> and <b>objective evaluation</b>.</p>
<table class="imgtable"><tr><td>
<img src="underwater_figure4.jpg" alt="alt text" width="600px" height="600px" /> </td>
<td align="left"></td></tr></table>
<table class="imgtable"><tr><td>
<img src="underwater_figure5.jpg" alt="alt text" width="550px" height="200px" /> </td>
<td align="left"></td></tr></table>
</td>
</tr>
</table>
</body>
</html>