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Cleaning up a circuit diagram

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  • Cleaning up a circuit diagram

    I have been given a scan (in png) of an electrical circuit diagram; the original diagram has been lost.

    The diagram appears to have a grey haze which, on zooming in, is lots of tiny black spots. The main lines of the diagram are black.

    Can someone suggest how I can remove the haze since it is made up of the same colour as the circuit lines and playing with black affects everything. Ideally I need to delete any black spots that are not immediately adjacent to another black spot (i.e. part of a line).

    Any help would be appreciated.

    Tiddlesuk.

  • #2
    I'd try blurring the image, increase contrast, save to 2 colors (black and white) color spectrum if it were me.

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