Camera Calibration Using Street Surveillance Camera for Detecting Wandering Elderly

Camera Self-Calibration and 3D Stratified Reconstruction for Image Sequences with Geometric Features

“…As evident, the errors generated by these methods become larger with the increase in σ. The results of SRA, OP-SRA, Zhang [5], Yang [17] and Miyahara [21] are similar, which are better than that of Wu's [16] method. This is because the algorithms of SRA, OP-SRA, Zhang [5], Yang [17] and Miyahara [21] are linear, and that of Wu [16] involves solving nonlinear equations, which results in large errors.…”

“…The results of the camera intrinsic parameters changing with noise were calculated, which under each noise level is the mean of the relative errors after 200 independent experiments. Following the addition of noise, the algorithms SRA and OP-SRA can be compared with Zhang [5], Wu [16], Yang [17] and Miyahara [21]. As the change in f u , f v , u 0 , and v 0 are similar, only the results of f u , u 0 , s are shown in Fig.…”

“…Figure 6 shows that the camera intrinsic parameters have a greater influence on the metric reconstruction, and the proposed methods SRA Fig. 4 Comparison of results of algorithms in Zhang [5], Wu [16], Yang [17], and Miyahara [21] under different noises: (a-c) show the variation curves of absolute error of the camera intrinsic parameters with noise level σ obtained using the proposed method SRA, OP-SRA, and other methods, respectively and OP-SRA have a good stability effect on the metric reconstruction.…”

“…Fig. 6 Zhang [5], Wu [16], Yang [17], Miyahara [21], SRA, and OP-SRA absolute errors of horizontal and vertical angle after metric reconstruction To verify the validity of the algorithm, the SRA was applied to complex scenarios. A streaming video of the program was captured (43s), wherein the frame number per second was 29 f/s, leading and trailing frames ranged as 29-1247f.…”

“…(10e), (10f) and (10g), (10h), it is evident that the measurement reconstruction results obtained from discrete images are similar to those obtained from video streams; however, the former has certain missing point clouds. A comparison of the absolute errors of the measurement information from (OP)SRA-RCM, (OP)SRA-DIM, (OP)SRA-VSM, Wu [16], Yang [17], Miyahara [21], and the truth values from Zhang [5] were is presented in Tab. 1.…”