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Thread: Removing Colors

  1. #1

    Default Removing Colors

    Hi,

    I am trying to remove an range of colors from a picture in order to get a good result for a black-white-conversion. The original picture contains black text and various colored areas. A simple black-white-conversion would turn some of these areas in black, so the text is no longer readable. I know how to replace a single color, but I am looking for a way to turn a whole color-range to white (e.g. all green-colors should turn white).

    Any ideas?

    Kind regards

    Werner

  2. #2

    Default

    It would be interesting to know if there is a IRFV tool or technique to do this but it sounds like a too sophisticated task for this particular program. Even in another graphics program I know well PDN (Paint.net) that is not an easy job if any part of the text and background are the same colour or displays as the same greyscale tone in the case of a b/w conversion.

    An obvious solution is to create a contrasting plain background box just behind the text or by outlining the text in a contrasting colour/tone or maybe introducing drop shadows by one way or another. Again this is well beyond what I think IRFV can do requiring a graphics program with a far greater selection of tools and features.

    If the background is a complex mix of tones I just do not think IRFV can do what is wanted but, as said, it would be interesting to find out if there is a method.

    It might help if you can post the image or a similar example so others can better understand the problem and come up with some more ideas.
    Last edited by BadRobot2018; 14.02.2019 at 02:39 PM.

  3. #3
    Multiple User jazzman's Avatar
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    Default

    It very much depends on the style of the image, so I agree that an example would be helpful.

    That said, you could try one of these Plugins which work with IrfanView:

    Martin Vicanek's Color Replacer: https://www.vicanek.de/imageprocessi...orreplacer.htm
    Jazzman's Colour Magic: http://www.westbrookjazz.de/filter/f0.html

    They are both similar and allow to set tolerance in selecting the colour(s) to be maniplated.

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