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How do you invert a black and white photo image on a Mac?

In this earlier Post (from 2015)...

How do you invert a black and white photo image on a Mac?

...the answer required the person to have Aperture, but the basic methodology suggested also works with Preview! This method is slightly different than the method they suggested. Instead you use the Toolbox tool of the Preview app, then adjust the "Black" slider and the "White" slider as shown in the images below:

User uploaded file

User uploaded file

MacBook Pro, OS X El Capitan (10.11.3), The Apple Preview App

Posted on Apr 25, 2018 10:29 PM

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Question marked as Top-ranking reply

Posted on Apr 26, 2018 3:16 AM

That is a nice discovery. Preview is getting more and more powerful as an image editor.



Since your post is in the Photos forum - you can also use the Curves adjustment in Photos to turn a photo into a negative. You just have to invert the RGB curve. Raise the curve for the 0 value to 255 and lower it for the 255 value to 0.

Before:

User uploaded file

After:

User uploaded file


To make the negative Black&White, click the Black&White adjustment.

1 reply
Question marked as Top-ranking reply

Apr 26, 2018 3:16 AM in response to StrugglEEng

That is a nice discovery. Preview is getting more and more powerful as an image editor.



Since your post is in the Photos forum - you can also use the Curves adjustment in Photos to turn a photo into a negative. You just have to invert the RGB curve. Raise the curve for the 0 value to 255 and lower it for the 255 value to 0.

Before:

User uploaded file

After:

User uploaded file


To make the negative Black&White, click the Black&White adjustment.

How do you invert a black and white photo image on a Mac?

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