machinevisiontoolbox.Image.nonzero

Image.nonzero()

Find non-zero pixel values as 2D coordinates

Returns:

coordinates of non-zero pixels

Return type:

ndarray(2,N)

The (u,v) coordinates are given as columns of the returned array.

Example:

>>> from machinevisiontoolbox import Image
>>> import numpy as np
>>> pix = np.zeros((10,10)); pix[2,3]=10; pix[4,5]=11; pix[6,7]=12
>>> img = Image(pix)
>>> img.nonzero()
array([[3, 5, 7],
       [2, 4, 6]])

References:

• Robotics, Vision & Control for Python, Section 12.1.3.2, P. Corke, Springer 2023.

Seealso:

flatnonzero