machinevisiontoolbox.Image.astype

Image.astype(dtype)[source]

Cast image datatype

Parameters:: dtype (str) – Numpy data type
Returns:: image
Return type:: Image

Create a new image, same size as input image, with pixels of a different datatype. Values are retained, only the datatype is changed.

Example:

>>> from machinevisiontoolbox import Image
>>> img = Image.Random(3)
>>> img.image
array([[253,   0, 221],
       [ 19, 252,  90],
       [ 36, 228, 151]], dtype=uint8)
>>> img.astype('float').image
array([[253.,   0., 221.],
       [ 19., 252.,  90.],
       [ 36., 228., 151.]])
>>> img = Image.Random(3, dtype='float')
>>> img.image
array([[0.4992, 0.5207, 0.3147],
       [0.7067, 0.9963, 0.2233],
       [0.6516, 0.3508, 0.9426]])
>>> img.astype('uint8').image
array([[0, 0, 0],
       [0, 0, 0],
       [0, 0, 0]], dtype=uint8)

Seealso:: to