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Is there an easy way to make a part of a photo negative with computer? Is there a good image viewer that does that.(esp open-source)

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What OS?​​​​​​​ –  Synetech Oct 19 '12 at 14:11
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up vote 4 down vote accepted

I guess GIMP can do that.

See Invert:

The Invert command inverts all the pixel colors and brightness values in the current layer, as if the image were converted into a negative. Dark areas become bright and bright areas become dark. Hues are replaced by their complementary colors.

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> I think your question should be in photography site not here. @codescope, actually no; this would not fit at Photography. –  Synetech Oct 19 '12 at 6:16
    
Also, it would be great – in the future – to expand your answers to more than just a link. Please give context where necessary and explain how the link answers the question. –  slhck Oct 19 '12 at 6:32
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Also, GIMP is not an image-viewer. –  Synetech Oct 19 '12 at 14:10
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Is there an easy way to make a part of a photo negative with computer?

Windows’ own MSPaint can invert a photo via Image⇨Invert Colors or Ctrl+I.

Is there a good image viewer that does that.(esp open-source)?

It’s not OSS, but IrfanView is one of the best image-viewers available. It can invert colors via Image⇨Negative.

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