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Acta Optica Sinica, Volume. 43, Issue 6, 0610001(2023)

Sharpness Detection Method for Aerial Camera Images Based on Digital Elevation Model

Dongchen Dai1,2, Lina Zheng1、*, Yu Zhang1,2, Haijiang Wang1,2, Qi Kang1, and Yang Zhang1
Author Affiliations
  • 1Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, Jilin, China
  • 2University of Chinese Academy of Sciences, Beijing 100049, China
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    AbstractGet PDF(in Chinese)
    Figures&Tables (9)
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    References (18)
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    Figures & Tables(9)
    Schematic diagram of aerial imaging model

    Fig. 1. Schematic diagram of aerial imaging model

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    Schematic diagram of reprojection error

    Fig. 2. Schematic diagram of reprojection error

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    Schematic diagram of Gauss imaging theorem and focal plane variation

    Fig. 3. Schematic diagram of Gauss imaging theorem and focal plane variation

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    Schematic diagram of sharpness detection method based on DEM

    Fig. 4. Schematic diagram of sharpness detection method based on DEM

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    Sharpness detection result of weak feature areas by proposed algorithm

    Fig. 5. Sharpness detection result of weak feature areas by proposed algorithm

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    Aerial image obtained after sharpness detection by proposed algorithm and mechanical structure adjustment

    Fig. 6. Aerial image obtained after sharpness detection by proposed algorithm and mechanical structure adjustment

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    Sharpness detection normalization function curves of classical sharpness detection algorithms and proposed algorithm in weak characteristic areas

    Fig. 7. Sharpness detection normalization function curves of classical sharpness detection algorithms and proposed algorithm in weak characteristic areas

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    • Table 1. Comparison of detection accuracies of different sharpness detection methods for strong characteristic areas and weak characteristic areas

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      Table 1. Comparison of detection accuracies of different sharpness detection methods for strong characteristic areas and weak characteristic areas

      AlgorithmSharpness detection accuracy of strong characteristic areaSharpness detection accuracy of weak characteristic area
      Brenner20.8×
      Laplacian28.4×
      Robert25.8×
      Sobel19.7×
      Proposed algorithm15.816.3

    • Table 2. Influence of feature point position in weak feature areas on sharpness detection accuracy

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      Table 2. Influence of feature point position in weak feature areas on sharpness detection accuracy

      Pixel coordinate of feature point in previous image（upper left corner is origin）Root-mean-square error of image sharpness parameter calculation /μm
      Root-mean-square error of total error16.275
      （4231，2875）16.275
      （3491，2943）16.778
      （3486，3082）14.314
      （2058，3152）14.210
      （1789，2645）14.573
      （1560，2693）14.928
      （74，2610）17.806
      （4229，2596）18.324
      （3499，2551）13.877
      （3482，2703）15.002
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    Dongchen Dai, Lina Zheng, Yu Zhang, Haijiang Wang, Qi Kang, Yang Zhang. Sharpness Detection Method for Aerial Camera Images Based on Digital Elevation Model[J]. Acta Optica Sinica, 2023, 43(6): 0610001

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    Paper Information

    Category: Image Processing

    Received: Jul. 21, 2022

    Accepted: Aug. 9, 2022

    Published Online: Mar. 13, 2023

    The Author Email: Zheng Lina (ailsazheng@163.com)

    DOI:10.3788/AOS221506

    Topics

    laser devices and laser physics
    Lasers and Laser Optics
    Laser physics
    laser manufacturing
    Instrumentation, Measurement and Metrology