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ImageDifference

ImageDifference[image₁,image₂]

gives an image in which each pixel is the absolute difference of the corresponding pixels in image₁ and image₂.

Details

ImageDifference computes the absolute pixel-wise difference, which can be used to spot regions of difference in images.
The images image₁ and image₂ must have the same dimensions.
ImageDifference works with arbitrary 2D or 3D images.
If image₁ or image₂ is a single-channel image, the absolute difference is computed from each channel of the other image in ImageDifference[image₁,image₂].
If image₁ and image₂ are both multichannel images, the values in each channel are compared separately.
ImageDifference[image₁,image₂] gives an image with the largest type of either image₁ or image₂.
For binary images, ImageDifference effectively finds the logical XOR of pixel values.

Examples

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Basic Examples (2)

Find differences between two versions of an image:

Logical XOR of two binary images:

Applications (1)

Find the amount of variation in a fairly constant image:

Properties & Relations (1)

Negate image pixels specified by a binary mask:

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