meanhsv {ImageMetrics}

Compute mean HSV and RGB of image/object

Package:

ImageMetrics

Version:

0.6

Description

meanrgb returns the mean RGB values for the imageMatrix object. meanHSV returns the mean HSV values for the imageMatrix object.

Usage

meanrgb(imageMatrix)
meanhsv(imageMatrix)

Arguments

imageMatrix: an imageMatrix object

Values

A list with three elements corresponding to the HSV or RGB measures in the imageMatrix.

Examples

## Compare brightness of video still capture from MSNBC footage of Obama, with still capture from 
## an ad featuring the same footage (only Obama appears darker) that appeared in an ad on the Clinton 
## campaign website, causing a stir in the blogosphere.
 
data(Campaign2008)
 
clinton = new("imageMatrix", X = readPNG(system.file("extdata", "Clinton.png", package="ImageMetrics")), type = "rgba")
clintonface = new("imageMatrix", X = ObjSelect( image = clinton@X, poly= clintonpoly ), type = "rgb")
 
msnbc = new("imageMatrix", X = readPNG(system.file("extdata", "MSNBC.png", package="ImageMetrics")), type = "rgba")
msnbcface = new("imageMatrix", X = ObjSelect( image = msnbc@X, poly= msnbcpoly ), type = "rgb")
 
 
## Not run:
plot(clinton)
plot(clintonface)
plot(msnbc)
plot(msnbcface)
## End(Not run)
 
 
meanhsv(clintonface)
meanhsv(msnbcface)

Author(s)

Solomon Messing <[last-name] at stanford dot edu>

Documentation reproduced from package ImageMetrics, version 0.6. License: BSD