Research Article
Image Analysis to Estimate Mulch Residue in Soil
Figure 4
Binary images from saturation plane (HSV color system), obtained from the original image showed in Figure 1, applying different thresholding methods: (a) Otsu ( = 0.2745; = 36.43); (b) Ridler-Calvard ( = 0.2677; = 35.72); (c) local entropy ( = 0.1412; = 57.57); (d) manual thresholding ( = 0.2499; = 38.24). Black pixels represent mulch and white pixels represent bare soil.
