[FIXED] How to create a white image in Python?

Issue

Upon doing my homework, I stumbled across a problem concerning Python and image manipulation. I must say, using the Image lib is not an option. So here it is

from scipy.misc import imread,imsave
from numpy import zeros

imga = zeros([100,100,3])
h = len(imga)
w = len(imga[0])

for y in range(h):
    for x in range(w):
        imga[y,x] = [255,255,255]

imsave("Result.jpg",imga)

I would assume it makes my picture white, but it turns it black, and I have no idea why It's not about the code (and I know it looks very ugly). Its just about the fact, that it is a black image.

Solution

Every color in an image is represented by one byte. So to create an image array, you should set it's dtype to uint8.

And, you don't need for-loop to set every elements to 255, you can use fill() method or slice index:

import numpy as np
img = np.zeros([100,100,3],dtype=np.uint8)
img.fill(255) # or img[:] = 255

Answered By - HYRY