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LCr4500_3D_Scanner_Application案例中的scan_images问题

DLP_LightCrafter_4500_3D_Scan_Application  (e2echina.ti.com/.../112882) 案例中的scan_images里有36帧条纹图像,存在一些问题:

1.是格雷码编码的图案吗;

2.为什么使用横竖两种条纹;

3.是存在取反的图案吗;

4.利用这些图像可重建得到三维点云结果吗。