How the camera sees mottling on a textured-paper wine label
To see mottling on a textured-paper wine label, you must see the whole solid. A small window will not show the cloud. If you cannot see it, change the light or the resolution first. Do not loosen the threshold first.
To see mottling on a textured-paper wine label, you must see the whole solid. A small window will not show the cloud. If you cannot see it, change the light or the resolution first. Do not loosen the threshold first.
Fix the optics first
The solid is dark in one patch and light in another, like cloud. If the picture cannot separate it, loosening the threshold only paints the wine name and the fine type red. You must see the whole solid. A small window will not show the cloud.
Optics
| Need | Enough | Not enough |
|---|---|---|
| You must see the whole solid. A small window will not show the cloud. | The solid is dark in one patch and light in another, like cloud. | Only a blurred circle left |
| About 3 pixels across | It stays | It comes and goes, and you still write that it can be caught |
| the wine name and the fine type in the field of view | The critical place is seen | Only the decorative edge is lit |
Try it on a sample
- Confirm the picture can separate it: The solid is dark in one patch and light in another, like cloud.
- Count about how many pixels it covers.
- If you cannot see it, change the light or the focus. Do not change the threshold.
