Laser & Optoelectronics Progress, Volume. 55, Issue 12, 121103(2018)
Method for Target-Background Contrast Enhancement Based on Color Polarization Imaging
Figures & Tables(11)
Fig. 1. Index of refraction of water and degree of polarization versus wavelength. (a) Index of refraction; (b) degree of polarization
Fig. 2. Index of refraction of SiO2 and degree of polarization versus wavelength. (a) Index of refraction; (b) degree of polarization
Fig. 5. Polarization images collected in experimental 1. (a) I0; (b) I45; (c) I90; (d) I135
Fig. 6. Polarization images within different channels in experiment 1. (a) R; (b) G; (c) B
Fig. 7. Images obtained in experiment 1. (a) Original color image; (b) synthesized color polarization image; (c) color polarization image with threshold of 0.2
Fig. 8. Polarization images collected in experimental 2. (a) I0; (b) I45; (c) I90; (d) I135
Fig. 9. Polarization images within different channels in experiment 2. (a) R; (b) G ; (c) B
Fig. 10. Images obtained in experiment 2. (a) Original color image; (b) synthesized color polarization image; (c) color polarization image with threshold of 0.2
Table 1. Vector-angle distance and contrast between original and polarization images for each group of experiments
View tableTable 1. Vector-angle distance and contrast between original and polarization images for each group of experiments
Serial number Image characteristic Target [R G B] Background [R G B] Vector-angle distance C 1 Raw color image [0.2429 0.3581 0.1842] [0.1836 0.2719 0.1409] 0.0023 0.1369 Color polarization image [0.1289 0.1178 0.1397] [0.0643 0.0620 0.0923] 0.0754 0.2779 2 Raw color image [0.6081 0.5895 0.5726] [0.6909 0.6581 0.6144] 0.0517 0.0187 Color polarization image [0.1677 0.0985 0.0665] [0.0424 0.0369 0.0487] 0.4445 0.2448 3 Raw color image [0.1552 0.1313 0.5708] [0.1892 0.1312 0.4782] 0.0943 0.0869 Color polarization image [0.1072 0.1764 0.0040] [0.1574 0.1960 0.0049] 0.1102 0.1596 4 Raw color image [0.5361 0.5341 0.4619] [0.5762 0.5697 0.5329] 0.0457 0.0200 Color polarization image [0.1477 0.1578 0.2312] [0.1561 0.1912 0.3408] 0.0554 0.1510 5 Raw color image [0.4857 0.4973 0.5134] [0.4275 0.3849 0.4139] 0.0992 0.0314 Color polarization image [0.1602 0.1452 0.1710] [0.2571 0.2565 0.3321] 0.2793 0.0472
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Xin Li, Ming Gao, Bin Feng. Method for Target-Background Contrast Enhancement Based on Color Polarization Imaging[J]. Laser & Optoelectronics Progress, 2018, 55(12): 121103
Paper Information
Category: Imaging Systems
Received: Apr. 23, 2018
Accepted: Jun. 20, 2018
Published Online: Aug. 1, 2019
The Author Email: Li Xin (lxx1267@163.com), Gao Ming (minggao1964@163.com)
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