Description Usage Arguments Value Author(s) References See Also Examples
View source: R/ImageAnalysis.R
Line running along the crest of highest black pixel.
1 |
imagematrix |
The matrix to be analysed. |
height_size |
Real size of image height (in mm, cm, m, etc..). |
width_size |
Real size of image width (in mm, cm, m, etc..). |
Top line size that cover black pixels
Carlos Biagolini-Jr.
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.
threshold_color
1 2 3 4 5 6 7 | # 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)
# See the proportion of black pixels (1) below each bush image matrix row
topline(bush_imagematrix,100,100)
# Conclusion: topline size is 785.6 cm.
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