Hi, and thanks for your interest in scikit-image! I answered on StackOverflow. [1] Briefly: you need to call `skimage.measure.label` on your edges array, because each value in your input image is considered one "object". ..[1] https://stackoverflow.com/questions/58552860/can-morphology-remove-small-obj...

On 26 Oct 2019, at 9:25 am, samzielkeryner@gmail.com wrote:

My binary image has lots of noise (small white blobs about 3-6 pixels in area). Can the function skimage.morphology.remove_small_objects() be used to remove these small blobs?

In my experimentation, the function leaves the image unchanged. Am I using the function incorrectly or is the function not suited to what I want to achieve?

src = cv2.imread('plan4.png') src = cv2.GaussianBlur(src, (3,3), 1)

edges = get_edges(src.copy())

noise_reduced = morphology.remove_small_objects(edges .copy(), 2,)

cv2.imshow('src', src) cv2.imshow('noise_reduced', noise_reduced) cv2.imshow('edges ', edges )

Below is the original with small white blobs (that I want to remove) and the result of remove_small_objects() notice they are the same and no blobs are removed. *Note: morphological closing or opening the image would remove these small blobs but it also degrades my lines too much. I really prefer finding blobs whose area is ~6 pixels and deleting those.

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