light_gap {bwimage}

Light gap

Description

Left and right distances from first black pixel to image edge.

Usage

light_gap(imagematrix, width_size = NA, scale = TRUE)

Arguments

imagematrix

The matrix to be analysed

width_size

Real size of image width (in mm, cm, m, etc..).

scale

If FALSE do not ajust the output for real size.

Value

Distances without black pixel in each side of the picture

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 vegetation Light gap in the bush image matrix
light_gap(bush_imagematrix,width_size=100)
# Conclusion: there is no light gap on both sides of bush image.