looking for software to convert picture to black and white

Discussion in 'macOS' started by bryantm3, Jul 31, 2006.

  1. bryantm3 macrumors regular

    Joined:
    Nov 15, 2003
    #1
    i don't mean greyscale- i mean just black and white. just some free software. my mac is updated- i'm running 10.4.7.
     
  2. eji macrumors 6502

    eji

    Joined:
    Jun 8, 2004
    Location:
    Inland Empire
    #2
    Why not do it in gresyscale right in iPhoto and knock the contrast up, effectively making it black and white?
     
  3. balamw Moderator

    balamw

    Staff Member

    Joined:
    Aug 16, 2005
    Location:
    New England
    #3
    That's effectively a threshold conversion to B&W. Remove color by turning the saturation down, then up the contrast.

    There are other forms of strict 2 bit black and white, like diffusion or pattern dithering that are made up of dots like halftones. Do you know what you want?

    B
     
  4. howesey macrumors 6502a

    Joined:
    Dec 3, 2005
    #4
    Install developer tools off your O X DVD and run Core Image Fun House.
     
  5. RacerX macrumors 65832

    Joined:
    Aug 2, 2004
    #5
    I'd suggest ToyViewer. It is a great app. I make tons of use of it in NEXTSTEP, OPENSTEP, Rhapsody and Mac OS X. I did a quick intro page on it for the Mac OS X version (here) and there is an online manual to help find out about the features (here).

    And its free! :D

    I've attached an example of what you are talking about doing. ToyViewer creates a new image window with each modification, and the bottom two windows are two different contrast levels taken from the middle window. The top window is the original image.
     

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