Noise Insensitive Focus Value Operator for Digital Imaging Systems

被引：6

作者：

Choi, Jongseong ^{[1
]}

Kang, Hee ^{[1
]}

Lee, Chang-Min ^{[2
]}

Kang, Moon Gi ^{[1
]}

机构：

[1] Yonsei Univ, Inst TMS Informat Technol, Seoul 120749, South Korea

[2] Samsung Techwin, Adv R&D Grp, Secur & Image Solut SIS Div, Gyeonggi Do, South Korea

来源：

IEEE TRANSACTIONS ON CONSUMER ELECTRONICS | 2010年 / 56卷 / 02期

关键词：

Auto-focusing; Focus value; Gaussian noise; Local statistics;

D O I：

10.1109/TCE.2010.5505933

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

Most auto-focusing algorithms based on focus values which are calculated with high frequency image components are very sensitive to noise factor. The noise under low illumination conditions generally degrades the auto-focusing performance. In this paper, we propose an operator to determine the noise insensitive focus value for digital imaging systems. The proposed algorithm determines the sharpness of a given image without the influence of noise factors. The algorithm uses spatially adaptive weights based on the local statistics of the image and the noise factors. Experiments conducted with and without noise factors demonstrate the high performance of the proposed method. (1)

引用

页码：312 / 316

页数：5

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