What a camera needs to see ink reticulation on a textured wine label
Sidelight shows the pebbling. Under straight light it looks like an ordinary screen. If you cannot see it, change the light or the resolution first. Do not loosen the threshold first.
Sidelight shows the pebbling. Under straight light it looks like an ordinary screen. If you cannot see it, change the light or the resolution first. Do not loosen the threshold first.
If you cannot see it, change the optics first
The ink film draws up into pebbles and will not lay flat. If the picture cannot separate it at all, moving the threshold only paints the wine name and the fine type on the textured wine label as a field of red. Sidelight shows the pebbling. Under straight light it looks like an ordinary screen.
Optics
| Needed | Enough looks like | Not enough looks like |
|---|---|---|
| Sidelight shows the pebbling. Under straight light it looks like an ordinary screen. | The ink film draws up into pebbles and will not lay flat. | Only a blurred circle left |
| About 3 pixels across | It shows steadily | It comes and goes, yet you write that it can be detected |
| The wine name and the fine type are in the field of view | The critical place is seen | The light only hits the decoration edge |
Try it on a sample sheet
- Confirm the picture can separate this: The ink film draws up into pebbles and will not lay flat.
- Count about how many pixels it covers.
- If you cannot see it clearly, change the light or the focus. Do not change the threshold.
