BUILT-IN MATHEMATICA SYMBOL

# ImageSubtract

ImageSubtract[image, x]
subtracts a constant amount x from each channel value in image.

ImageSubtract[image1, image2]
gives an image in which each pixel is obtained by subtracting the values of the corresponding pixels in and .

## DetailsDetails

• The image returned by ImageSubtract[image, ...] has the same dimensions as image.
• If the image dimensions are different, ImageSubtract[image1, image2] subtracts from the center of .
• If or is a single-channel image, its values are subtracted from the values in each channel of the other image in ImageAdd[image1, image2].
• If and are both multichannel images, the values in each channel are subtracted separately.
• In ImageSubtract[image, x], the number x is normally in the range 0 to 1.
• ImageSubtract[image, x] gives an image with the same underlying data type as image, clipping or truncating values if necessary.
• In ImageSubtract[image, x], x can be a number, a color, or a list of color channel values.
• ImageSubtract[image1, image2] gives an image with the largest type of either or , clipping or truncating values if necessary.
• ImageSubtract works with Image3D objects.

## ExamplesExamplesopen allclose all

### Basic Examples (2)Basic Examples (2)

Subtract a binary mask from a color photo:

 Out[1]=

Subtracting a constant amount from each color channel darkens an image:

 Out[1]=