bwimage (version 1.3)

denseness_total: Denseness for whole image

Description

Proportion of black pixels in relation to all pixels. It do not take into account transparent pixels (when present).

Usage

denseness_total(imagematrix)

Arguments

imagematrix

The matrix to be analysed.

Value

Proportion of black pixels in relation to all pixels. It do not take into account transparent pixels (when present).

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

# NOT RUN {
# Get a matrix from your image. Here  examples provided by bwimage package.

# I) Calculate vegetation denseness
bush<-system.file("extdata/bush.JPG",package ="bwimage")
bush_imagematrix<-threshold_color(bush,  "jpeg", "proportional",compress_rate = 0.1)
denseness_total(bush_imagematrix)

# II) Calculate canopy openness
# Convert image into binary matrix
canopy<-system.file("extdata/canopy.JPG",package ="bwimage")
canopy_matrix<-threshold_color(canopy,"jpeg", compress_method="proportional",compress_rate=0.1)
1-denseness_total(canopy_matrix) # canopy openness
# }