Principles of 3D reconstruction

In machine vision applications, the acquisition of the three-dimensional shape of an object is becoming more and more important. 3D image acquisition devices currently available in the machine vision industry, along with the most common technologies. We will also briefly describe the principles of 3D reconstruction under different techniques.
There are two basic principles for 3D reconstruction: triangulation and time-of-flight (ToF) measurement. once the coordinates of the first two points of the triangle and the two corners of the ray connecting the first two points to the third point, you can calculate the coordinates of the third point of the triangle. In contrast, ToF cameras emit radiation and measure the time it takes for the radiation to reflect back to the sensor.

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