ColorNegate

ColorNegate[image]

gives the negative of image, in which all colors have been negated.

ColorNegate[color]

gives the negative of a color.

ColorNegate[{expr1,…}]

gives a list of negative images or colors.

Details

  • ColorNegate, also known as color inversion, replaces every pixel in the image with the negative of that pixel.
  • ColorNegate maps every pixel value or color v to 1-ν. For images with defined color spaces, negation happens in the RGBColor space. »
  • ColorNegate returns a color or an image of the same ColorSpace as the input.
  • ColorNegate works with colors as well as arbitrary 2D and 3D images.

Examples

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Basic Examples  (2)

Color negate an image:

Negative of the color red:

Scope  (6)

Invert a binary image:

Negative of a black-and-white photo:

Negation of a color image:

Negative of a grayscale 3D image:

Negation of a 3D color volume:

Negative of an Lab color:

Negative of the color Yellow:

Applications  (4)

Invert a color negative:

Create an image effect by only negating the luminance channel of an urban night skyline:

Create false colorizations of an image by negating only one of the three RGB channels:

DeleteSmallComponents deletes small white components:

Make it delete small black components instead:

Properties & Relations  (6)

Color negation is equivalent to subtracting the image from 1:

Color negation happens in the RGBColor space:

Color negation results in the same color regardless of representation:

Color negation of gray results in gray:

Histogram of the negated image is a mirror of the original image:

ColorNegate of an RGB image is equivalent to mapping every pixel v to 1-v:

This does not hold true for other color spaces:

Introduced in 2008
 (7.0)
 |
Updated in 2012
 (9.0)
2014
 (10.0)