Image Identity

I have seen many different things in various lighting fixtures and have learned a lot.

• Areas that appear bright are those that reflect (scatter) the light of the illuminator and have a large amount of light that enters the camera well.
• Color is only on the scattering surface. There is no color on the mirror surface.
• To increase the contrast of a defect, the presence of the defect should change the direction of the light so that the amount of light entering the camera fluctuates significantly. Stable detection is difficult because the light needs to change the angle significantly at low angles and with high directional light.
• Increasing the contrast of defects and increasing image stability (i.e., the same image when the same object is imaged) are contradictory. Increasing the contrast of defects means that the image will fluctuate greatly with the slightest defect, while increasing image stability means that defects will be harder to see.

Such as.

What we have to be careful about is that we will never get the answer by discussing lighting alone. You have to combine it with a suitable algorithm to get the answer.