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.

analyze_bound(img, imgname, obj, mask, line_position, device , debug=None, filename=False)

returns device, boundary headers, boundary data, image with boundary data

• Parameters:
  • img - image object (most likely the original), color(RGB)
  • imgname - name of image
  • 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 bottom of the image)
  • device - Counter for image processing steps
  • debug - None, "print", or "plot". Print = save to file, Plot = print to screen. Default = None
  • filename - False or image name. If defined print image
• Context:
  • 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.
  • Could also be used as a method of flagging images about to go out-of-bounds (this QC tool will be added later)
• Example use:
  • Use In VIS Tutorial

Output Data Units: - Y-Position - Height of the bound line used for measurement (height from bottom of image), pixels (units)
- Height-Above-Bound - Extent-y of object above bound line, pixels (units)
- Height-Below-Bound - Extent-y of object below bound line, pixels (units)
- Area-Above-Bound - area of object above bound line, pixels (units)
- Area-Below-Bound - area of object below bound line, pixels (units)
- Percent-Above-Bound - percentage of total area above the bound line
- Percent-Below-Bound - percentage of total area below the bound line

import plantcv as pcv

# Set Boundary Line    
device, boundary_header, boundary_data, boundary_img1 = pcv.analyze_bound(img, imgname, obj, mask, 950, device, debug='print', 'setaria_boundary_img.png')

Boundary tool output image (y = 950)

Boundary line set at 950, purple line is boundary line, blue line is extent y above boundary line, green is area above boundary line.

Boundary tool output image (y = 330)

Boundary line set at 330, 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.