No wonder it doesn't work.

After the work from before the exhibition was completed, we had a summary meeting with the dealers who had come in to support us and divided up the responsibilities. We will now mobilize all of our staff to begin follow-up.

In the course of this summary, I got a fuller picture of the stories of those I was not able to speak to directly, and it seems that "image processing inspections are not working as well" as I had imagined. This had nothing to do with the size of the company. It seems that even those who seem to have considerable skills are actually struggling.
*The "filter" that says "you visited our booth" is still in place...

As I mentioned at the seminar, the basic premise of all product inspections is that 100% of defective products must be recognized, whereas even character reading, which has been studied extensively, does not have a 100% recognition rate. It is no wonder that it does not work, as it is equivalent to trying the impossible: to define all defects and then recognize 100% of them.
The only thing we can be sure of is "whether it is the same as a good product or not. But there is nothing we can do about "defects that do not appear in the image".

In any case, image processing inspections are very imperfect, and the only answer is to "try the actual product," and the only way to "get it right" is to "try the actual product and then apply it to what works.