多子直方图均衡微光图像增强及FPGA实现

陈莹; 朱明

doi:10.3788/CO.20140702.0225

多子直方图均衡微光图像增强及FPGA实现

doi: 10.3788/CO.20140702.0225

陈莹^1,2,
朱明^1, ,

1.
中国科学院长春光学精密机械与物理研究所航空光学成像与测量中国科学院重点实验室, 吉林长春 130033;
2.
中国科学院大学北京 100049

基金项目:

国家自然科学基金资助项目（No.11071103）

详细信息

作者简介:
陈莹（1989-），女，辽宁盘锦人，硕士研究生，2012年于吉林大学大学获得学士学位，主要从事数字图像处理，图像增强方面的研究。E-mail：cy890305@sina.cn

通讯作者:
朱明，E-mail：zhu_mingca@163.com

中图分类号: TP212;TP911.73
计量
- 文章访问数: 1878
- HTML全文浏览量: 541
- PDF下载量: 742
- 被引次数: 0
出版历程
- 收稿日期: 2013-11-10
- 修回日期: 2014-02-08
- 刊出日期: 2014-03-25

Multiple sub-histogram equalization low light level image enhancement and realization on FPGA

CHEN Ying^1,2,
ZHU Ming^{1
, ,}

1.
Key Laboratory of Airborne Optical Imaging and Measurement, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, China;
2.
University of Chinese Academy of Sciences, Beijing 100049, China

摘要

摘要: 针对微光图像对比度低，目标难以识别的问题，对微光图像增强算法进行了研究。提出了一种多子直方图均衡增强算法，该算法首先将直方图按面积平均分割成4个子直方图，利用平均像素数量作为阈值切割直方图降低过度增强现象，然后加入尺度因子对动态范围进行调整，最后分别对子直方图均衡得到增强效果。此算法用Verilog语言在现场可编程门阵列（FPGA）上具体实现，并给出了主观和客观的评价，改进算法能产生更清晰的图像，在硬件平台上也能实时显示增强效果，一帧图像处理时延约为0.45 ms。实验结果表明，改进算法不会产生饱和、噪声放大的现象，图像细节保持较好，满足视频图像处理实时性要求，得到了具有较好视觉效果的增强图像。
- 图像增强 /
- 直方图均衡 /
- 微光图像 /
- FPGA /
- 实时性
Abstract: In order to solve the problems that low light level image has low contrast and it is difficult to distinguish objective, it is necessary to research on low light level image enhancement algorithm. A multiple sub-histogram equalization enhancement algorithm is proposed. Initially, in the proposed algorithm, the histogram are separated into four parts according to the area equally. Then, the resultant sub-histograms are clipped according to the average number of pixels of input image to reduce the enhancement phenomenon. In addition, the scale factor is adopted to adjust dynamic range. Finally, each sub-histogram is equalized. The algorithm is implemented on FPGA with verilog language, and is given subjective and objective evaluation. With this algorithm good results can be achieved in real-time on the hardware platform, and the delay of an image processing is about 0.45 ms. Experimental results show that with this proposed algorithm no saturation and noise amplification phenomenon appear, and image details of the processed image are well preserved and highlighted. The algorithm meets the real-time requirement and the enhanced images of better visual effect can be achieved.
- image enhancement /
- histogram equalization /
- low light level image /
- FPGA /
- real time

HTML全文

参考文献(1)

[1] 蔡式东, 杨芳. 基于直方图修正的图像增强算法[J]. 光电子技术, 2012, 32(3):155-159. CAI SH D, YANG F. Image enhancement based on histogram modification[J]. Optoelectronic Technology, 2012, 32(3):155-159.(in Chinese) [2] ABDULLAH-AL-WADUD M, HASANUL KABIR M, ALI AKBER DEWAN M, et al.. A dynamic histogram equalization for image contrast enhancement[J]. IEEE Transactions on Consumer Electronics, 2007, 53(2):593-601. [3] YANG F, WU J. An improved image contrast enhancement in multiple-peak images based on histogram equalization[J]. IEEE Conference Publications, 2010, 1:346-349. [4] CELIK T, TJAHJADI T. Automatic image equalization and contrast enhancement using gaussian mixture modeling[J]. IEEE Transactions on Image Processing, 2012, 21(1):145-156. [5] 范永杰, 张亚萍, 陈华. 平台直方图均衡算法实现的存储优化方法[J]. 激光与红外, 2013, 5:522-525. FAN Y J, ZHANG Y P, CHEN H. Realizing, memory optimization to plateau histogram[J]. Lasers and Infrared, 2013, 5:522-525.(in Chinese) [6] 吴成茂. 可调直方图均衡化的正则解释及其改进[J]. 电子学报, 2011, 39(6):1278-1284. WU CH M. Regularization explanation of adjustable histogram equalization and its improvement[J]. Acta Electronic Sinica, 2011, 39(6):1278-1284.(in Chinese) [7] 吴强, 王新赛, 贺明, 等. 一种结合小波分析与直方图的红外图像增强方法[J]. 应用光学, 2011, 32(3):464-467. WU Q, WANG X R, HE M, et al.. Infrared image enhancement based on wavelet analysis and histogram[J]. J. Appl. Optics, 2011, 32(3):464-467.(in Chinese) [8] 黄梅, 吴志勇, 梁敏华, 等. 暗背景下低灰度图像的实时增强[J]. 液晶与显示, 2011, 26(3):374-378. HUANG M, WU ZH Y, LIANG M H, et al.. Real-time enhancement method of low gray image under dark background[J]. Chinese J. Liquid Crystals and Displays, 2011, 26(3):374-378.(in Chinese) [9] WELLING P, KIM S H, CHO S B. Brightness preserving contrast enhancement using polynomial histogram amendment. IEEE Soc Design Conference, Jeju Island, Korea, 4-7 November, 2012. [10] CHEN H O, KONG N S P, IBRAHIM H. Bi-histogram equalization with a plateau limit for digital image enhancement[J]. IEEE Consumer Elevtronics, 2009, 55(4):2072-2087. [11] GAN C, YE Z. Brightness preserving histogram equalization with maximum entropy:a variational perspective[J]. IEEE Transactions on Consumer Electronics, 2005, 51(4):1326-1334. [12] 孙海江, 王延杰, 刘伟宁. 基于自适应平台阈值和拉普拉斯变换的红外图像增强[J]. 中国光学, 2011, 4(5):474-479. SUN H J, WANG Y J, LIU W N. Enhancement of infrared images based on adaptive platform threshold and laplace transformation[J]. Chinese Optics, 2011, 4(5):474-479.(in Chinese) [13] 王静轩, 尹传历. 基于DSP和FPGA的嵌入式实时图像增强系统[J]. 液晶与显示, 2013, 28(3):459-463. WANG J X, YIN CH L. Embedded color image enhancement system based on DSP and FPGA[J]. Chinese J. Liquid Crystals and Displays, 2013, 28(3):459-463.(in Chinese) [14] 吴家伟, 武春风, 庹文波. 红外图像实时显示增强系统设计[J]. 光学精密工程, 2009, 17(10):2612-2619. WU J W, WU CH F, YU W B. Design of real-time infrared image enhancement system[J]. Opt. Precision Eng., 2009, 17(10):2612-2619.(in Chinese) [15] 李强, 龚俊亮. 基于FPGA的实时红外图像采集与预处理系统[J]. 红外, 2012, 33(10):21-24. LI Q, GONG J L. Design of real-time infrared image acquisition and pre-process system based on FPGA[J]. Infrared, 2012, 33(10):21-24.(in Chinese) [16] 姜文涛, 陈卫东, 钱钧, 等. 基于FPGA的实时图像增强设计[J]. 应用光学, 2010, 31(6):965-968. JIANG W T, CHEN W D, QIAN J, et al.. Real-time image enhancement based on FPGA[J]. J. Appl. Optics, 2010, 31(6):965-968.(in Chinese) [17] 韩希珍, 赵建. 结合偏微分方程增强图像纹理及对比度[J]. 光学精密工程, 2012, 20(6):1382-1388. HAN X ZH, ZHAO J. Enhancement of image texture and contrast combined with partial differential equation[J]. Opt. Precision Eng., 2012, 20(6):1382-1388.(in Chinese) [18] 张超, 李洪文, 贾建禄, 等. 高帧频多通道图像采集与显示[J]. 液晶与显示, 2013, 28(4):593-597. ZHANG CH, LI H W, JIA J L, et al.. High frame rate and multiple channels digital image acquisition and display[J]. Chinese J. Liquid Crystals and Displays, 2013, 28(4):593-597.(in Chinese) [19] 贺柏根, 刘剑, 马天玮. 基于DSP+FPGA的实时图像去雾增强系统设计[J]. 液晶与显示, 2013, 28(6):968-972. HE B G, LIU J, MA T W. Real-time image defogging and enhanced system designed based on DSP+FPGA[J]. Chinese J. Liquid Crystals and Displays, 2013, 28(6):968-972.(in Chinese) [20] 尹传历, 王啸哲. 机载嵌入式图像增强系统设计与实现[J]. 液晶与显示, 2013, 28(4):604-607. YIN CH L, WANG X ZH. Design and realization of airborne embedded image enhancement system[J]. Chinese J. Liquid Crystals and Displays, 2013, 28(4):604-607.(in Chinese) [21] 孙玉胜, 白克. 基于小波变换与加权滤波的电机红外图像增强[J]. 液晶与显示, 2010, 25(3):439-443. SUN Y SH, BAI K. Enhancement of motor infrared image based on wavelet transform and weighted filtering[J]. Chinese J. Liquid Crystals and Displays, 2010, 25(3):439-443.(in Chinese)

施引文献

附加信息(0)

访问统计

计量

文章访问数: 1878
HTML全文浏览量: 541
PDF下载量: 742
被引次数: 0

姓名
邮箱
手机号码
标题
留言内容
验证码

留言板

多子直方图均衡微光图像增强及FPGA实现

doi: 10.3788/CO.20140702.0225

作者简介:
陈莹（1989-），女，辽宁盘锦人，硕士研究生，2012年于吉林大学大学获得学士学位，主要从事数字图像处理，图像增强方面的研究。E-mail：cy890305@sina.cn

通讯作者:
朱明，E-mail：zhu_mingca@163.com

计量

Multiple sub-histogram equalization low light level image enhancement and realization on FPGA

计量

目录

《中国光学（中英文）》跻身光学领域期刊Q3区

留言板

多子直方图均衡微光图像增强及FPGA实现

doi: 10.3788/CO.20140702.0225

作者简介: 陈莹（1989-），女，辽宁盘锦人，硕士研究生，2012年于吉林大学大学获得学士学位，主要从事数字图像处理，图像增强方面的研究。E-mail：cy890305@sina.cn

通讯作者: 朱明，E-mail：zhu_mingca@163.com

计量

出版历程

Multiple sub-histogram equalization low light level image enhancement and realization on FPGA

计量

出版历程

目录

《中国光学（中英文）》跻身光学领域期刊Q3区

作者简介:
陈莹（1989-），女，辽宁盘锦人，硕士研究生，2012年于吉林大学大学获得学士学位，主要从事数字图像处理，图像增强方面的研究。E-mail：cy890305@sina.cn

通讯作者:
朱明，E-mail：zhu_mingca@163.com