benkuykendall's profile - activity

2015-07-16 12:09:43 -0600	commented answer	How should I choose the shape of the structuring element for a morphological closing? I can kind of see what you are saying. (although I think you're wrong about the square -- a square aligned with the x axis is like norm-inf, a square rotated 45 degrees and inscribed in the larger square is like norm-L1). But in any case, what effects would this consideration of distance have on the image? And why might someone use another shape like a cross or a rectangle?
2015-07-15 23:15:21 -0600	asked a question	How should I choose the shape of the structuring element for a morphological closing? I am working on a Python script to identify objects in an image and place each on a transparent background. My currently steps are Open image Apply bilateral filter to smooth textures Use Canny to find edges Apply a closing to fill gaps in the edges Find contours Use each contour to mask the image appropriately Everything is working fairly well, but I had a question about the closing. I am currently using a 5 by 5 square as the structuring element for closing. I am aware of the getStructuringElement method that allows for easy production of other shapes, but I don't understand why I would choose one shape over another. What shapes might I consider for my application, and why?