Completely shuts out the outflow of defective products.

Here are two photos, one of the "good" one.
Now compare the two photos.
If they are aligned and match exactly, what is the "other" photo?
We can only say that the "other" photo is a "good" photo.
In other words, by inspecting whether or not the image looks the same as a good product, we can realize an image inspection that allows only good products to pass through.
Incidentally, defects that do not show up in the image are absolutely impossible to be detected by image inspection.
FlexInspectorBasic is based on this concept of visual inspection.