| 基于图像亮度特性统计的水下距离选通成像自动增益控制方法 |
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| 引用本文： | 张威,杨克成,傅博,夏珉,范泛,李微.基于图像亮度特性统计的水下距离选通成像自动增益控制方法[J].光学与光电技术,2010,8(4):52-55. |
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| 作者姓名： | 张威 杨克成 傅博 夏珉 范泛 李微 |
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| 作者单位： | 华中科技大学光电子科学与工程学院,湖北,武汉,430074 |
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| 摘 要： | 对水下激光距离选通成像质量与系统增益的关系进行了分析，提出了一种基于图像亮度特性统计的普适性自动增益控制方案。该方案通过设定不同灰度统计阈值，甄别目标图像的亮度特性，并以此作为控制系统增益的主要依据。在对水下大动态范围照度目标或慢速运动目标等进行成像的特殊场合，该方案也具备较强的适用性，能实时反馈控制系统增益，使成像质量优化。
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| 关 键 词： | 距离选通成像 自动增益控制 亮度特性 动态范围 |
A Method of AGC Based on Image Illumination Characteristic Statistics for Underwater Range-Gated Imaging Systems |
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| ZHANG Wei,YANG Ke-cheng,FU Bo,XIA Min,FAN Fan,LI Wei.A Method of AGC Based on Image Illumination Characteristic Statistics for Underwater Range-Gated Imaging Systems[J].optics&optoelectronic technology,2010,8(4):52-55. |
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| Authors: | ZHANG Wei YANG Ke-cheng FU Bo XIA Min FAN Fan LI Wei |
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| Institution: | ( School of Optoelectronic Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, China ) |
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| Abstract: | A scheme of automatic gain control （AGC） based on image illumination characteristic statistics is presented by an alyzing the relationship between the quality of underwater range-gated images and the gain of system. The main basis of AGC is the illumination characteristics of images, judged by means of different grayscale thresholds. This scheme can rapidly adjust the system gain via real-time feedback, and has strong applicability for various underwater imaging occasions, including some special applications to those targets with huge dynamic range illumination or moving in slow motion. |
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| Keywords: | range-gated imaging AGC illumination characteristic dynamic range |
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