R: Converts an RGB image to a gray scale image

as.MonochromeImage.RGBImage {R.image}

R Documentation

Converts an RGB image to a gray scale image

Converts an RGB image to a gray scale image.

## S3 method for class 'RGBImage':
as.MonochromeImage(this, threshold=2^(depth(this)/3)/2, coefs=c(0.3, 0.59, 0.11), ...)

`coefs`	A `numeric` `vector` of length 3 for coefficients in [0,1].
`...`	Not used.

The coefficients are multiplied with the red, green, and blue color components and summed in order to obtain a gray scale.

Returns a MonochromeImage object.