Mean Value of the Pixels in an Image — mean.Rcpp_Image • Rvision

Returns the mean of the pixel values of an Image object. If the Image object has more than one channel, it returns the mean for each channel.

Usage

# S3 method for class 'Rcpp_Image'
mean(x, ..., mask = NA)

Arguments

x: An Image object.
...: Unused at the moment.
mask: A single-channel (GRAY) 8-bit (8U) Image object with the same dimensions as x. This can be used to mask out pixels that should not be considered when calculating the mean (pixels set to 0 in the mask will be ignored during the mean calculation).

Value

A numeric value (for single-channel images) or a vector of numeric values (for multi-channel images).

See also

Author

Simon Garnier, garnier@njit.edu

Examples

balloon <- image(system.file("sample_img/balloon1.png", package = "Rvision"))
mean(balloon)
#>        B        G        R 
#> 164.7881 149.6252 128.1291