Why Numpy.asarray Return An Array Full Of Boolean

If I want to have an array filled whith 0 or 1 depending of the pixels value in a image, I write this : image = 'example.jpg' imageOpen = Image.open(image) bwImage = imageOpen.conv

Solution 1:

In a nutshell : In python True is 1 and False is 0. This should correct this weird behavior :

bw_np = numpy.asarray(bwImage, dtype=int)

Long answer : Maybe imageOpen.convert("1", dither=Image.NONE) prefer bool instead of int32 for a better memory management :

import sys
import numpy

print("Size of numpy.bool_() :", sys.getsizeof(numpy.bool_()))
print("Size of numpy.int32() :", sys.getsizeof(numpy.int32()))

Result :

Size of numpy.bool_() : 13
Size of numpy.int32() : 16