Mask-Rectangle¶

Takes an input image and returns a binary image masked by a rectangular area denoted by p1 and p2. Note that p1 = (0,0) is the top left hand corner bottom right hand corner is p2 = (max-value(x), max-value(y)).

rectangle_mask(img, point1, point2, device, debug=None,color="black")

returns device, masked, binary img, contours, hierarchy

• Parameters:
  • img - Input image
  • p1 - Point is the top left corner of rectangle (0,0) is top left corner
  • p2 - Point is the bottom right corner of rectangle (max-value(x),max-value(y)) is bottom right corner
  • device - Counter for image processing steps
  • debug - None, "print", or "plot". Print = save to file, Plot = print to screen. Default = None
  • color - "black", "gray","white", default is "black" this acts to select (mask) area from object capture (need to invert to remove)
• Context:
  • Used to mask rectangular regions of an image
• Example use:
  • Use In NIR Tutorial

Grayscale image




from plantcv import plantcv as pcv

# Makes a rectangle area that will be treated as a mask
device, masked, binary, contours, hierarchy = pcv.rectangle_mask(img, (0,0), (75,252), device, debug="print", color="black")

Region of interest




Masked image