Can someone please explain to me what would the following line do?
bgr = img[:,:,:3]
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That copies all of the first and second dimensions, but only the first 3 elements of the 3rd dimension. If you had a (5,5,5) array, you would end up with a (5,5,3) array. Imagine if you had an image that was a (640,480,3) array; img[:,:,:2] would keep the R and G values, but not the B.Tim Roberts– Tim Roberts2021-06-08 06:26:53 +00:00Commented Jun 8, 2021 at 6:26
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1 Answer
What you want to look for here is "slicing" and "indexing". Have a look on those links:
- https://numpy.org/doc/stable/reference/arrays.indexing.html
- https://www.w3schools.com/python/numpy/numpy_array_slicing.asp
Basically, img is a 3-dimensional array and you are selecting all elements of axis "0" and "1", but only the first 3 elements ([0,1,2])of axes "2".
