as.matrix.im

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Convert Pixel Image to Matrix or Array

Converts a pixel image to a matrix or an array.

Keywords
methods, spatial
Usage
## S3 method for class 'im':
as.matrix(x, ...)
  ## S3 method for class 'im':
as.array(x, ...)
Arguments
x
A pixel image (object of class "im").
...
See below.
Details

The function as.matrix.im converts the pixel image x into a matrix containing the pixel values. It is handy when you want to extract a summary of the pixel values. See the Examples. The function as.array.im converts the pixel image to an array. By default this is a three-dimensional array of dimension $n$ by $m$ by $1$. If the extra arguments ... are given, they will be passed to array, and they may change the dimensions of the array.

Value

  • A matrix or array.

See Also

as.matrix.owin

Aliases
  • as.matrix.im
  • as.array.im
Examples
# artificial image
   Z <- setcov(square(1))

   M <- as.matrix(Z)

   median(M)
   
   # plot the cumulative distribution function of pixel values
   plot(ecdf(as.matrix(Z)))
Documentation reproduced from package spatstat, version 1.31-2, License: GPL (>= 2)

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