pythonopencvimage-loading

batch processing of images in python opencv is not working

I used this code to read series of png format images in a folder. but it reads only one image successfully. What is the reason for that?

from glob import glob

for fn in glob('*.png'):
   im = cv2.imread(fn)
Solution

  • You've only got one variable (called im) so it can only hold one image. You probably want a list of images:

    # Make empty list
imgs = []

for fn in glob('*.png'):
    im = cv2.imread(fn, cv2.IMREAD_COLOR)
    imgs.append(im)

    Or, you can use a "list comprehension":

    imgs = [ cv2.imread(fn, cv2.IMREAD_COLOR) for fn in glob('*.png') ]