Region of interest to mask

Convert a region of interest/object contour to a binary mask of the same shape

plantcv.roi.roi2mask(img, roi)

returns mask

  • Parameters:

    • img - RGB or grayscale image data
    • roi - ROI as an instance of the class Objects

  • Context:

    • img parameter is only used to determine the size of the mask getting created.
  • Example use:
    • below

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 = "plot"

# Read in the image
img, filename, filepath = pcv.readimage(filename="plant_image.png")

roi = pcv.roi.custom(img=img, vertices=[[1190,490], [1470,830], [920,1430], [890,950]])

# Convert the ROI contour into a binary mask
mask = pcv.roi.roi2mask(img=img, roi=roi)

Custom ROI Image

Screenshot

Binary Mask

Screenshot

Source Code: Here