Time-Sharing Infrared Polarization Imaging System for Moving Target Detection

Polarization-Based Reflection Suppression Method and Its Application to Target Detection

“…In this paper, 16 polarization images acquired with different combinations of polarization state generation and polarization state analysis are calculated by Equation (11) to obtain the linear Mueller matrix image, as shown in Figure 3. The different intensity values in Figure 3 reflect the intensity differences between different pixels in the Mueller matrix parameters, and the target and background can be distinguished by the intensity differences between pixels.…”

“…Studies indicate that incident light has significant polarization characteristics after specular reflection [9,10]. Based on this, Yang designed a time-sharing infrared polarization imaging system for moving target detection [11]. The system acquires images of infrared radiation intensity in different polarization directions of the target by rotating the polarizer continuously and rapidly.…”

Design and verification of fast-rotating polarization imaging system in dynamic scenes

“…From the polarization images like Figure 10 (c) and Figure 10(d), it could be seen that the white cloth ( 2), (3), and white tape (4) had similar colors but different polarization properties, which had different textures in the corresponding regions on the polarization images. x is the average gray value of the background area [13] . In order to facilitate the comparison, the absolute value of C was used.…”

“…In recent years, a pipelined processing flow has emerged to improve the polarization imaging frame rate of the type of rotating polarizer [10][11][12] . The current division-of-time device of the rotating polarizer can get polarization images with a frame rate of 45 FPS and 640 × 512 pixels [13] , but it still can't meet the needs of continuous detection of fast-moving targets. Therefore, in order to further increase the polarized imaging frame rate of the division-of-time polarization imaging system of the rotating polarizer, this paper modifies the imaging scheme of the division-of-time system of the rotating polarizer.…”

“…The system designed in this paper can output polarization images with pixels of 1280 × 1180 at a frame rate of 51 FPS. Under the premise that the signal-to-noise ratio of the system meets the requirements of the detector, if the pixel number of 640 × 512 used in the reference [13] is used, the polarization imaging frame rate of the system can be increased from 51 FPS to 80 FPS. The frame rate of the polarization imaging system can be further improved to better meet the polarization detection requirements for fast-moving targets.…”