为了更好地增强图像的细节信息、提高图像的对比度,提出了基于子层分割对比度拉伸算法.根据直方图特征将其平均分为4个子层区域,在每个子层中根据其灰度值概率密度之和的大小对灰度区域进行拓展或压缩.为了防止灰度区域被过分压缩或拉伸,引入了约束因子α.以现场可编程门阵列为中央处理器,采用组合逻辑对本文算法进行建模.在得到直方图统计结果的基础上,算法可在一个时钟周期完成,相比于流水线操作时间减少了5×103 ns,可满足50 frame/s的实时图像处理要求.该系统具有集成度高、图像处理速度快和实时性强等特点.
参考文献
| [1] | Rui L.A quantitative measure based infrared image enhancement algorithm using plateau histogram[J].Optics Communications,2010,283:4283-4288.,2010. |
| [2] | 贺柏根,刘剑.基于DSP+ FPGA的实时图像去雾增强系统设计[J].液晶与显示,2013,6(28):968-972.He B G,Liu J.Real time image defogging and enhanced system designed based on DSP+FPGA[J].Chinese Jourhal of Liquid Crystal and Displays,2013,6(28):968-972.(in Chinese),2013. |
| [3] | Xiang Z B.Image enhancement using multi scale image features extracted by top hat transform[J].Optics & Laser Technology,2012,44:328-336.,2012. |
| [4] | 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(04):604-607. |
| [5] | 孙伟,李大健,刘宏娟,贾伟.基于大气散射模型的单幅图像快速去雾[J].光学精密工程,2013(04):1040-1046. |
| [6] | 易盟,郭宝龙,严春满.结合优化梯度滤波与投影不变的航拍视频配准[J].光学精密工程,2012(03):651-660. |
| [7] | Turgay C.Two-dimensional histogram equalization and contrast enhancement[J].Pattern Recognition,2012,45:3810-3824.,2012. |
| [8] | Lee Chulwoo,Lee Chul.Power constrained contrast enhancement for emissive displays based on histogram equalization[J].IEEE Transactions on Image Processing,2012,21 (1):80-93.,2012. |
| [9] | 牛英宇.图像自适应分段线性拉伸算法的FPGA设计[J].现代电子技术,2010(10):78-80. |
| [10] | 武治国,王延杰.一种基于直方图非线性变换的图像对比度增强方法[J].光子学报,2010(04):755-758. |
| [11] | Hamouda M.An efficient dsp-fpga-based real-time implementation method of SVM algorithms for an indirect matrix converter[J].IEEE Transactions On Industrial Electronics,2011,58(11):5024-5031.,2011. |
| [12] | 熊文彬,蒋泉,曲建军,于军胜.基于FPGA实现的视频显示系统[J].液晶与显示,2011(01):92-95. |
| [13] | 刘春香,郭永飞,李宁,司国良,李云飞.星上多通道遥感图像的实时合成压缩[J].光学精密工程,2013(02):445-453. |
| [14] | Porikli F.Constant time O (1) bilateral filtering[C].IEEE Conference on Computer Vision and Pattern Recognition,2008.,2008. |
| [15] | Paris S,Durand F.A fast approximation of the bilateral filter using a signal processing approach[C].ECCV,2006:568-580.(in Chinese),2006. |
| [16] | 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(06):1382-1388. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%