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Author: Admin | 2025-04-28
By counter saturation. All images are tonemapped using MATLAB’s built-in tonemap function. (a) Original HDR image; (b) Counter saturation; (c) Ours. Figure 10. (a) Our 16 pixel prototype implemented in 180 nm CMOS. (b) Support circuitry such as counters and digital readout are placed outside of the array, with the pixels and FAD circuits in the center. (c) Area comparision between a single SPAD pixel (left) and a FAD unit (right). Figures (a,b) reproduced with permission from [40]. Figure 10. (a) Our 16 pixel prototype implemented in 180 nm CMOS. (b) Support circuitry such as counters and digital readout are placed outside of the array, with the pixels and FAD circuits in the center. (c) Area comparision between a single SPAD pixel (left) and a FAD unit (right). Figures (a,b) reproduced with permission from [40]. Figure 11. Comparison between the results from our chip and a per-pixel counter when a light gradient is projected onto the chip. The columns show results for different numbers of cycles (n). The color scale represents the total counts, and any value over 255 is clipped [40]. Reprinted with permission from [40]. Figure 11. Comparison between the results from our chip and a per-pixel counter when a light gradient is projected onto the chip. The columns show results for different numbers of cycles (n). The color scale represents the total counts, and any value over 255 is clipped [40]. Reprinted with permission from [40]. Figure 12. Flash LiDAR typically uses a pulsed light source to flood illuminate the scene and a SPAD array to capture the photon arrival data (a). Timing circuits measure the photon arrival profile, and the full histogram of photon arrival information ((b), top) is reported, and depth is inferred from the difference in the histogram peaks. By measuring this difference directly ((b), bottom), we reduce the data transmitted and achieve high resolution depth imaging. Reproduced with permission from [41]. Figure 12. Flash LiDAR typically uses a pulsed light source to flood illuminate the scene and a SPAD array to capture the photon arrival data (a). Timing circuits measure the photon arrival profile, and the full histogram of photon arrival information ((b), top) is reported, and depth is inferred from the difference in the histogram peaks. By measuring this difference directly ((b), bottom), we reduce the data transmitted and achieve high resolution depth imaging. Reproduced with permission from [41]. Figure 13. Illustration of possible dual arrival types. Colored arrows (with two colors corresponding to two adjacent SPADs) indicate signal photons, and grey arrows are background photon arrivals. The first arrival on each SPAD may come from signal or background. Figure 13. Illustration of possible dual arrival types. Colored arrows (with two colors
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