plate of grain, free of
artifacts.
To test that the new grain is the same as the old grain, set Output to Grain Plate.
This generates a sheet of grain with the same luminance level as the mean of the sample region. The sample region with the original grain is also displayed. It should be impossible to differentiate between the two regions. The figure on the left shows a good selection area giving a good test plate of grain in the figure on the right.
|
|
|
| Good selection area... | ...producing a good test plate of grain, free of artifacts. |
Below, the figure on the left shows a poor selection area since it contains image detail. The figure on the right shows the resulting test plate which clearly highlights the problem.
|
|
| Bad selection area... | ...producing a poor result. |