Fig. 4
From: Image analysis for the automatic phenotyping of Orobanche cumana tubercles on sunflower roots
Comparison of the number of tubercles in inoculated sunflower roots using manual counting versus automatic counting. Results for one experiment (19 rhizotrons) using the susceptible 2603 genotype inoculated with the O. cumana race Bourret at 3 weeks of culture. Comparison of manual counting (x axis) with automatic counting (y axis) using the ImageJ macro (correlation coefficient = 0.83). (The values defined in the macro are as follows: hue = 0–55, saturation = 102–255, brightness = 95–255; the size of particles is between 0.05 and 20 mm2)