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Step 8Painted areas
I found large painted areas to be the most problematic to deal with.
First you need a way to see through the paint.
Copy the image to a new layer, and desaturate it. Choose luminosity. You will probably see a fair bit of detail already. You can bring this out a bit more by changing the layer's blend mode - I found "burn" to be particularly good. Adjust the layer's lightness (Colours > Hue-Saturation) to bring out more detail (this is more effective than using brightness/contrast). Ensure the layer you are actually working on is active, and select any painted ground plane and substrate areas you want to remove. Save the selections to a channel, and delete them. You may also be able to use the clone tool to paint tracks over these areas, however be careful not to paint in tracks that aren't there!
I also discovered that a very clear, but somewhat rougher at the edges, view of the painted area detail can be obtained by decomposing to HSV (Colours > Components > Decompose > HSV) and viewing the saturation layer. It may be worth copying this to the main image as a layer, and experimenting with brightness, inversion, and modes.
You may find it easiest to make the selections for these areas by using the manual selection tools rather than the fuzzy select. I found it easiest to select the whole area, then isolate the bits I wanted to keep by de-selecting them. Always ensure the layer you are working on is selected, not whatever layer you are using to see the detail, otherwise your hard work will be lost.
First you need a way to see through the paint.
Copy the image to a new layer, and desaturate it. Choose luminosity. You will probably see a fair bit of detail already. You can bring this out a bit more by changing the layer's blend mode - I found "burn" to be particularly good. Adjust the layer's lightness (Colours > Hue-Saturation) to bring out more detail (this is more effective than using brightness/contrast). Ensure the layer you are actually working on is active, and select any painted ground plane and substrate areas you want to remove. Save the selections to a channel, and delete them. You may also be able to use the clone tool to paint tracks over these areas, however be careful not to paint in tracks that aren't there!
I also discovered that a very clear, but somewhat rougher at the edges, view of the painted area detail can be obtained by decomposing to HSV (Colours > Components > Decompose > HSV) and viewing the saturation layer. It may be worth copying this to the main image as a layer, and experimenting with brightness, inversion, and modes.
You may find it easiest to make the selections for these areas by using the manual selection tools rather than the fuzzy select. I found it easiest to select the whole area, then isolate the bits I wanted to keep by de-selecting them. Always ensure the layer you are working on is selected, not whatever layer you are using to see the detail, otherwise your hard work will be lost.
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