Patent ID: 11967116
Assignee: HUAZHONG UNIVERSITY OF SCIENCE AND TECHNOLOGY
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 0:
1. A method for computing characterization parameters of polarization image information,
wherein the method for computing characterization parameters of the polarization image information comprises:
Step S1: obtaining n polarized subimages of the polarization imaging target, wherein each of the polarized subimages corresponds to a different polarization angle and n≥3, wherein a polarizer is located between a detector and a polarization imaging target, and is placed close to the detector to cover a full aperture of the detector;
Step S2: computing a parameter matrix [ILP (x, y) INLP(x, y) θ(x, y)] of a polarization cosine characterization equation of all pixel points of the polarization imaging target according to all of the polarized subimages and the polarization cosine characterization equation of the polarization imaging target, wherein the polarization cosine characterization equation is as follows:

I(t, x, y)=ILP(x, y) cos2(t−θ(x, y))+INLP(x, y),

where I(t, x, y) is a polarization intensity value of a pixel point (x, y) observed by an observer when a polarization angle of the polarizer is t, t, ILP (x, y) is a linear polarization intensity of the pixel point, INLP(x, y) is a non-linear polarization intensity of the pixel point, θ(x, y) is a polarization angle of the pixel point, and t represents the polarization angle of the polarizer when the polarizer is used to observe the polarization imaging target, (t−θ(x, y)) represents an included angle between the polarization angle θ(x, y) of maximum polarization intensity of the pixel point and the polarization angle t of the polarizer and cos2 (t−θ(x, y)) refers to a projection of the maximum polarization intensity of the pixel point in a polarization direction of the polarizer; and
Step S3: obtaining a polarization image of the polarization imaging target at a given polarization angle of the polarizer by the polarization cosine characterization equation and the parameter matrix obtained in Step 2, to improve an accuracy of the polarization image of the polarization imaging target at the given polarization angle.