| 一种用于数码视频相机的实时自动聚焦算法 |
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| 引用本文： | 盛云,秦亚杰,洪志良. 一种用于数码视频相机的实时自动聚焦算法[J]. 光电工程, 2008, 35(8): 139-144 |
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| 作者姓名： | 盛云 秦亚杰 洪志良 |
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| 作者单位： | 复旦大学,专用集成电路与系统国家重点实验室,上海,201203;复旦大学,专用集成电路与系统国家重点实验室,上海,201203;复旦大学,专用集成电路与系统国家重点实验室,上海,201203 |
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| 摘 要： | 本文针对数码视频相机的噪声大,主体位置不确定性及实时性要求高等特点,详细讨论了传统自动对焦算法的缺陷并提出了一种新的自动对焦算法.该算法采用一种新的可有效抑制高频噪声的对焦量函数--高斯一阶导数(FDOG)来正确评价图像对焦趋势;支持最近主体优先的感兴趣区域自动选择,使得系统可以自动找到主体所在位置进行对焦;结合爬山法,二叉搜索和插值拟合进行对焦搜索,相比传统的两段爬山法,搜索效率提高了40%;通过对聚焦后的图像进行监视,支持视频模式下的动态自动对焦.该算法在一个数码视频相机平台上实现,实验结果验证了算法的优点,适用于高性能数码视频相机.
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| 关 键 词： | 自动对焦 数码视频相机 高斯一阶导数 最近主体优先 感兴趣区域 二叉搜索 |
| 收稿时间： | 2008-01-05 |
Real-time Auto-focusing Algorithm for Digital Video Camera |
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| SHENG Yun,QIN Ya-jie,HONG Zhi-liang. Real-time Auto-focusing Algorithm for Digital Video Camera[J]. Opto-Electronic Engineering, 2008, 35(8): 139-144 |
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| Authors: | SHENG Yun QIN Ya-jie HONG Zhi-liang |
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| Affiliation: | SHENG Yun,QIN Ya-jie,HONG Zhi-liang ( State Key Lab of ASIC , System,Fudan University,Shanghai 201203,China ) |
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| Abstract: | Digital video camera has the properties of large noise, uncertain location of main body and high requirement of real-time. The disadvantages of traditional auto-focusing algorithms were discussed in detail and a new auto-focusing algorithm was proposed. A novel focus measure filter called First Derivative of Gaussian (FDOG) was developed to estimate the degree of focusing correctly by the suppressing high frequency noise. To enable the auto-focusing system to focus on the exact main body, an automatic regio... |
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| Keywords: | auto-focusing digital video camera first derivative of Gaussian region of interest binary search |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
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