歸一化互相關 NCC (normalized cross correlation)
https://store.intelrealsense.com/buy-intel-realsense-d400-cameras-calibration-target.html https://www.intel.com/content
多視覺幾何課程: http://www.robots.ox.ac.uk/~victor/teaching/practicals/Practical_MVG.html http://www.robots.ox.ac.uk/~vgg/hzbo