Create an elliptical Region of Interest (ROI)¶

plantcv.roi.ellipse(x, y, r1, r2, angle, img)

returns roi_contour, roi_hierarchy

• Parameters:
  • x - The x-coordinate of the center of the ellipse.
  • y - The y-coordinate of the center of the ellipse.
  • r1 - The radius of the major axis.
  • r2 - The radius of the minor axis.
  • angle - The angle of rotation of the major axis.
  • img - An RGB or grayscale image to plot the ROI on in debug mode.
• Context:
  • Used to define a region of interest in the image.

Reference Image

from plantcv import plantcv as pcv

# Set global debug behavior to None (default), "print" (to file), or "plot" (Jupyter Notebooks or X11)
pcv.params.debug = "print"

roi_contour, roi_hierarchy = pcv.roi.ellipse(x=200, y=200, r1=100, r2=80, angle=0, img=rgb_img)