imageToIntensity: imageToIntensity

In CulturalAnalytics: Functions for statistical analysis and plotting of image properties

Description

Convert an image to an intensity map.

Usage

imageToIntensity(image, method="perceptual")

Arguments

image	An RGB raster image.
method	A string naming the method to use for colour conversion. "mean" - Use the mean of the red, green and blue channels. "perceptual"- Weight the red, green and blue channels perceptually.

Details

Many algorithms require an intensity map of the image rather than the full-colour version of the image. An intensity map is a greyscale version of the image.

Value

A greyscale image matrix.

Examples

library(CulturalAnalytics)
library(jpeg)
imgdir<-paste(system.file(package = "CulturalAnalytics"), "images", sep = "/")
imgs<-paste(imgdir, dir(path = imgdir, pattern = ".jpg"), sep = "/")
img<-readJPEG(imgs[1])
intensity<-imageToIntensity(img)

CulturalAnalytics documentation built on May 2, 2019, 5:24 p.m.