Suggestion Of The Lighting Reflection When Using Dot Chart Target On The Measuing Camera

Advantages of diffuse reflection ceramic material: white background, dark blue pattern.

It uses white ceramic and additional white coating to prevent internal reflection, so it's very suitable for front lighting measurements.

The contrast is strong, the diffuse reflection characteristic is the best, and the reflection is completely eliminated It has good flatness and can be used as high-precision pattern Metal material: the biggest advantage of this material: falling resistance, light tightness, and general diffuse reflection Disadvantages: heavyweight Carbon fiber material: Fall resistant, light-tight, super light, and high hardness; Good diffuse reflection characteristics

It is suggested that the pattern size of the calibration board should be about 1 / 2 of the field of view and about 15-20 calibration patterns, so as to capture all areas of the field of view as much as possible. In theory, the accuracy of the primary extraction in round points will be higher than that of corner points. In order to obtain better results.

For the calibration results, it is recommended to select the dot calibration board, and OpenCV also supports the dot calibration board.