ImageMultiply

ImageMultiply[image,x]

multiplies each channel value in image by a factor x.

ImageMultiply[image1,image2]

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

ImageMultiply[image,expr1,expr2,…]

multiplies all expri with image, where each expri can be either an image, a number, or a color value.

Details

  • The image returned by ImageMultiply[image,…] has the same dimensions as image.
  • In ImageMultiply[image,x], x can be a number normally in the range 0 to 1, a color, or a list of color channel values.
  • ImageMultiply[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, ImageMultiply[image1,image2] multiplies image2 into the center of image1.
  • If image1 or image2 is a single-channel image, its values are multiplied by the values in each channel of the other image in ImageMultiply[image1,image2].
  • If image1 and image2 are both multichannel images, the values in each channel are multiplied separately.
  • ImageMultiply[image1,image2] gives an image with the largest type of either image1 or image2, clipping or truncating values if necessary.
  • For binary images, ImageMultiply effectively finds the logical AND of pixel values.
  • ImageMultiply[image,expr1,expr2,…] folds ImageMultiply on the list of arguments.
  • ImageMultiply[{image,expr1,expr2,…}] is equivalent to ImageMultiply[image,expr1,expr2,…].
  • ImageMultiply works with Image3D objects.

Examples

open allclose all

Basic Examples  (4)

Mask an image by multiplying it with a grayscale image:

Brighten an RGB image by multiplying all pixels with a constant factor:

Logical AND of two binary images:

Colorize a binary 3D image:

Applications  (5)

Create a division operator, typically used for detecting motion:

Uniform multiplicative noise:

Colorize channels of an image:

Create a vignette effect:

Multiply a color and a grayscale image to create a composition:

Properties & Relations  (1)

When multiplying images and colors, typically the image data type is preserved:

Wolfram Research (2008), ImageMultiply, Wolfram Language function, https://reference.wolfram.com/language/ref/ImageMultiply.html (updated 2014).

Text

Wolfram Research (2008), ImageMultiply, Wolfram Language function, https://reference.wolfram.com/language/ref/ImageMultiply.html (updated 2014).

CMS

Wolfram Language. 2008. "ImageMultiply." Wolfram Language & System Documentation Center. Wolfram Research. Last Modified 2014. https://reference.wolfram.com/language/ref/ImageMultiply.html.

APA

Wolfram Language. (2008). ImageMultiply. Wolfram Language & System Documentation Center. Retrieved from https://reference.wolfram.com/language/ref/ImageMultiply.html

BibTeX

@misc{reference.wolfram_2024_imagemultiply, author="Wolfram Research", title="{ImageMultiply}", year="2014", howpublished="\url{https://reference.wolfram.com/language/ref/ImageMultiply.html}", note=[Accessed: 22-November-2024 ]}

BibLaTeX

@online{reference.wolfram_2024_imagemultiply, organization={Wolfram Research}, title={ImageMultiply}, year={2014}, url={https://reference.wolfram.com/language/ref/ImageMultiply.html}, note=[Accessed: 22-November-2024 ]}