heigh_maximum {bwimage} | R Documentation |
Height of the highest black pixel in the image
Description
Find the higher black pixel in the whole image.
Usage
heigh_maximum(imagematrix, height_size)
Arguments
imagematrix |
The matrix to be analysed. |
height_size |
Real size of image width (in mm, cm, m, etc..). |
Value
Height of the highest black pixel. It is scaleted for the real size (in mm, cm, m, etc..) based in the information from argument height_size.
Author(s)
Carlos Biagolini-Jr.
References
Zehm et al 2003 Multiparameter analysis of vertical vegetation structure based on digital image processing. Flora-Morphology, Distribution, Functional Ecology of Plants, 198: 142-160.
See Also
threshold_color
Examples
# First, get a matrix from your image. Here an example of a bush image is used.
bush<-system.file("extdata/bush.JPG",package ="bwimage")
bush_imagematrix<-threshold_color(bush, "jpeg", "proportional", compress_rate = 0.1)
# Calculate height of the highest black pixel in the bush image matrix
heigh_maximum(bush_imagematrix,height_size=100)
# Conclusions: The highest vegetation unit ,i.e. highest black pixel, is 84.4 cm above ground.
[Package bwimage version 1.3 Index]