Remove tool



  • Anyone have any examples of the "Remove" tool: Dust, Garbage, Fill leftover?



  • The Remove Tool isn't very well explained in the manual. It's basically the Correction Drawing Line Filter > Remove Dust. In that Filter there are four modes of operation.
    Delete Opaque Point
    Delete Point In White Background
    Fill Transparent Hole with Color Of Background
    Fill Transparent Hole with Drawing Color

    The Remove Tool Sub Tools are all one tool with different operation modes assigned (and different Input methods for some reason).

    To understand what each mode does we can look at what the Preview of the Remove Dust filter does to a Monochrome image with no white pixels (just black line art).

    0_1475631530615_with transparency.jpg

    Image 1 is the original. Actually, the original was a greyscale scanned image. Remove Dust does very little with Greyscale images despite what the manual says. Translucent pixels are mostly ignored by the filter. Some translucent pixels are removed so maybe there's a level of grey that needs to be met before the dust is removed. The greyscale scanned image was set to monochrome with white pixels removed and rasterized.

    In Image 2 the mode is set to Delete Opaque Point. The dust particles are removed.

    In Image 3 the mode is set to Delete point in White Background. Nothing happens because there isn't any white on the layer. No dust is removed.

    In Image 4 the mode is set to Fill Transparent Hole with Color of Background and the white spots (they're white because of the Paper background layer - the holes are really transparent) in the line work are filled with Black (the color surrounding the hole).

    In Image 5 the mode is set to Fill Transparent Hole with Drawing Color. I've set the drawing color to red and the holes are filled with red.

    Now about that Delete Point in White Background Mode:

    0_1475633377382_with black and white.jpg

    If the layer is Monochrome with the white pixels remaining and rasterized, this mode will remove the points of dust but none of the other modes will do anything.

    The manual says that dust removal can work on raster layers in Color, Gray, and Monochrome modes but that is a little misleading as far as I can tell. If the image is greyscale, not many gray particles of dust are removed. The particles have to be a level of black or opaqueness that satisfies the filter. If the greyscale image is set to Monochrome mode, the grey information is still retained by the layer and the filter still won't work on particles lower than certain level of opaqueness. The Monochrome layer needs to be rasterized (unless I'm doing something wrong).

    Moving on to the sub tools. They all have different Input methods (marquee, brush, and lasso). I like brush. If you have a preference, recreate the tool with your preferred method of input. Select the sub tool and click the menu at the top left corner. Click Create Sub Tool. Change the method of Input and save the tool. Delete the old tool.

    Or use just one sub tool with a Brush as the method of Input. Change the Mode of Operation as needed.

    There is one tool that has a special feature and that's the tool which selects the dust particles instead of deleting them. It works the same basic way as the removal filter but with selections instead of deletions.



  • Thanks again garlam :)


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