Adaptive Enhancement Methods for Division of Focal Plane Polarimetric Imaging of Water Surface High Dynamic Range Scenes

Meishu Wang; Jianguo Yang; Weiqi Jin; Su Qiu; Yixue Wang

doi:10.3788/AOS231898

Acta Optica Sinica, Volume. 44, Issue 18, 1801006(2024)

Adaptive Enhancement Methods for Division of Focal Plane Polarimetric Imaging of Water Surface High Dynamic Range Scenes

Meishu Wang¹, Jianguo Yang¹, Weiqi Jin^1,2、*, Su Qiu¹, and Yixue Wang^1,2

Author Affiliations

¹MOE Key Laboratory of Optoelectronic Imaging Technology and System, School of Optics and Photonics, Beijing Institute of Technology, Beijing 100081, China

²Guangdong Key Laboratory of Intelligent Detection in Complex Environment of Aerospace, Land, and Sea , Zhuhai 519088, Guangdong , China

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Figures & Tables(11)

Fig. 1. Flow chart of WP-HDR imaging method

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Fig. 2. Experimental setup and field environment

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Fig. 3. Images of water surface scene in different polarization directions obtained by division of focal plane (DOFP) polarimeter. (a) $θ = 0 °$ ; (b) $θ = 45 °$ ; (c) $θ = 90 °$ ; (d) $θ = 135 °$

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Fig. 4. Calculation results of water surface polarization images. (a) Intensity; (b) I_max; (c) I_min

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Fig. 5. Grayscale histogram distributions of I_min and I_max. (a) Scene 1; (b) scene 2; (c) scene 3

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Fig. 6. Segmentation results of water surface polarization images. (a) Segmentation results of Otsu; (b) results after filtering; (c) binaryzation

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Fig. 7. Single polarization direction enhancement results. (a) $θ = 0 °$ ; (b) $θ = 45 °$ ; (c) $θ = 90 °$ ; (d) $θ = 135 °$

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Fig. 8. Water surface original image and processing results of different methods. (a) Intensity; (b) ATCE; (c) CLAHE; (d) WP-HDR

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Table 1. Calculation results of contrasts of water surface polarization images
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Table 1. Calculation results of contrasts of water surface polarization images
Scene C
Intensity I_max I_min
1 0.7790 0.8241 0.6997
2 0.8061 0.8418 0.7491
3 0.8530 0.8852 0.8308

Table 2. Standard deviation s of single polarization direction enhancement results
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Table 2. Standard deviation s of single polarization direction enhancement results
Scene $θ = 0 °$ $θ = 45 °$ $θ = 90 °$ $θ = 135 °$
1 0.29 0.25 0.32 0.28
2 0.22 0.26 0.28 0.25
3 0.37 0.37 0.37 0.37

Table 3. Test results of different methods to improve image quality

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Table 3. Test results of different methods to improve image quality

Scene	Method	C_C	s	G
1	Intensity	12.11	0.33	0.02
	ATCE	20.22	0.24	0.02
	CLAHE	36.76	0.32	0.03
	WP-HDR	49.59	0.23	0.03
2	Intensity	0.31	0.25	0.01
	ATCE	0.07	0.23	0.01
	CLAHE	0.33	0.27	0.02
	WP-HDR	0.33	0.23	0.03
3	Intensity	2.47	0.39	0.01
	ATCE	2.56	0.36	0.01
	CLAHE	3.79	0.35	0.01
	WP-HDR	3.23	0.32	0.01

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Meishu Wang, Jianguo Yang, Weiqi Jin, Su Qiu, Yixue Wang. Adaptive Enhancement Methods for Division of Focal Plane Polarimetric Imaging of Water Surface High Dynamic Range Scenes[J]. Acta Optica Sinica, 2024, 44(18): 1801006

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