Horizontal Boundary Line Tool¶
Set boundary line with boundary tool, this allows the user to find the extent-y ('height') above and below as well as the area above and below the boundary line. This tool functions best if the pot size/position of the plant remains relatively constant.
plantcv.analyze_bound_horizontal(img, obj, mask, line_position)
returns image with boundary data
- img - RGB or grayscale image data for plotting
- obj - single or grouped contour object
- mask - binary mask of selected contours
- line_position = position of boundary line (a value of 0 would draw the line through the top of the image)
- Used to define a boundary line for the image, to find the height above and below as well as area above and below a boundary line.
- Example use:
- Output data stored: Data ('horizontal_reference_position', 'height_above_reference', 'height_below_reference', 'area_above_reference', 'percent_area_above_reference',
'area_below_reference', 'percent_area_below_reference') automatically gets stored to the
Outputsclass when this function is ran. These data can always get accessed during a workflow (example below). For more detail about data output see Summary of Output Observations
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" # Set Boundary Line boundary_image = pcv.analyze_bound_horizontal(img, obj, mask, 300) # Access data stored out from analyze_bound_horizontal percent_area_below_reference = pcv.outputs.observations['percent_area_below_reference']['value']
Boundary tool output image (y = 300)
Boundary line set at 300, purple line is boundary line, blue line is extent y above boundary line, green is area above boundary line.
Boundary tool output image (y = 520)
Boundary line set at 520, purple is boundary line, blue line is extent y above boundary line, green line is extent y below boundary line, green is area above boundary line and red is area below boundary line.