• Infrared and Laser Engineering
  • Vol. 45, Issue 10, 1028001 (2016)
Wang Yeru*, Feng Huajun, Xu Zhihai, Li Qi, and Chen Yueting
Author Affiliations
  • [in Chinese]
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    DOI: 10.3788/irla201645.1028001 Cite this Article
    Wang Yeru, Feng Huajun, Xu Zhihai, Li Qi, Chen Yueting. An adjustable coverage range autofocus evaluation function using gradient operator with variable frequency[J]. Infrared and Laser Engineering, 2016, 45(10): 1028001 Copy Citation Text show less
    References

    [1] Feng Huajun, Mao Bangfu, Li qi, et al. An auto-focusing system used for digital imaging[J]. Opto Electronic Engineering, 2004, 31(10): 69-72. (in Chinese)

    [2] Zhu Kongfeng, Jiang Wei, Wang Duanfang, et al. New kind of clarity-evaluation-function of image[J]. Infrared and Laser Engineering, 2005, 34(4): 464-468. (in Chinese)

    [3] Groen F C A, Young I T, Ligthart G. A comparison of different focus functions for use in autofocus algorithms[J]. Cytometry, 1985, 6(2): 81-91.

    [4] Mo Chunhong, Liu Bo, Ding Lu, et al. A gradient threshold auto-focus algorithm [J]. Infrared and Laser Engineering, 2014, 43(1): 323-327. (in Chinese)

    [5] Li Qi. Studies on the theory and implementation method of digital autofocus technology[D]. Hangzhou: Zhejiang University, 2004. (in Chinese)

    [6] Xu Guili, Liu Xiaoxia, Tian Yupeng, et al. Image clarity-evaluation-function method[J]. Infrared and Laser Engineering, 2009, 38(1): 181-184. (in Chinese)

    [7] Li Qi, Feng Huajun, Xu Zhihai, et al. Digital image sharpness evaluation function[J]. Acta Photonica Sinica, 2002, 31(6): 736-738. (in Chinese)

    [8] Kang Zongming, Zhang Li, Xie Pan. Implementation of an automation focusing algorithm based on spatial high frequency energy and entropy[J]. Acta Electronica Sinica, 2003, 31(4): 552-555. (in Chinese)

    [9] Zhao Hui, Bao Getang, Tao Wei. Experimental research and analysis of automatic focusing function for imaging measurement[J]. Optics and Precision Engineering, 2004, 12(5):531-536. (in Chinese)

    [10] Marichal X, Ma W, Zhang H J. Practical issues in pixel-based auto focusing for Machine Vision[C]//IEEE Int Conf Image Processing, 1999, 2: 386-390.

    CLP Journals

    [1] Peng Zhou, Chenghai Hu, Chao Bi, Xue Hao. Auto focusing technology of three-axis vision measuring system[J]. Infrared and Laser Engineering, 2021, 50(12): 20210141

    Wang Yeru, Feng Huajun, Xu Zhihai, Li Qi, Chen Yueting. An adjustable coverage range autofocus evaluation function using gradient operator with variable frequency[J]. Infrared and Laser Engineering, 2016, 45(10): 1028001
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