Description Usage Arguments Author(s) References See Also Examples
View source: R/ImageAnalysis.R
Find the height which a given proportion of black pixel is found.
heigh_propotion_test(imagematrix, proportion, height_size)
The matrix to be analysed.
Proportion of denseness to test.
Real size of image height (in mm, cm, m, etc..).
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.
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# 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 heigh_propotion_test(bush_imagematrix,0.75,100) # Conclusion: in this imagem, 75 percent of the vegetation is hold below 31.2 cm.
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