Infrared and Laser Engineering, Volume. 52, Issue 1, 20220342(2023)
Image sharpness evaluation and variable-step fusion focusing method
Figures & Tables(7)
Fig. 1. Classification of digital image processing sharpness evaluation algorithm
Fig. 4. Comparison diagram of image sharpness evaluation curve after normalization
Table 1. Optical design parameters
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Parameter Value Wave band/μm 7-15 Focal distance/mm 20-100 Rear intercept/mm 15.41 Incoming pupil diameter/mm 20-100 F/# 1.5 Imaging range/m 0.5- +∞ Transfer function > 0.2 Alignment plane +∞ Focusing rang/mm −25- +30
Table 2. Algorithm comparison results
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Algorithm Focusing time/ms Failure rate Proposed 1242 2% Roberts 1381 12% Laplacian 1410 10% Sobel 1332 8% Prewitt 1266 10% Canny 1120 12% Log 1258 8%
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Hongliang Pan, Jinxia Sun, Xizhen Han. Image sharpness evaluation and variable-step fusion focusing method[J]. Infrared and Laser Engineering, 2023, 52(1): 20220342
Paper Information
Category: Optical imaging
Received: May. 18, 2022
Accepted: --
Published Online: Feb. 9, 2023
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