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 .

ImageSubtract[image,expr1,expr2,]
subtracts all from image, where each can be either an image, a number, or a color value.

DetailsDetails

  • The image returned by ImageSubtract[image,] has the same dimensions as image.
  • In ImageSubtract[image,x], x can be a number normally in the range 0 to 1, a color, or a list of color channel values.
  • ImageSubtract[image,x] typically gives an image with the same underlying data type as image, clipping or truncating values if necessary.
  • 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.
  • ImageSubtract[image1,image2] gives an image with the largest type of either or , clipping or truncating values if necessary.
  • ImageSubtract[image,expr1,expr2,] folds ImageSubtract on the list of arguments.
  • ImageSubtract[{image,expr1,expr2,}] is equivalent to ImageSubtract[image,expr1,expr2,].
  • ImageSubtract works with Image3D objects.

ExamplesExamplesopen allclose all

Basic Examples  (3)Basic Examples  (3)

Subtract a binary mask from a color photo:

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

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Subtracting two 3D images:

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