cv2.imshow() doesn't properly display image

Question

I was trying to check on what data was actually being read in via cv2.imread() but whenever I do so I get a full grey screen. I should be getting a rainbow image instead.

def detect_pixels():
    txt_parts = {}
    path = r'C:\Users\Singh\Documents\jpgtotxt\rainbow.jpg'
    BRG = cv2.imread(path)
    cv2.imshow('BRG', BRG)
    time.sleep(3)

score 2 · Answer 1 · answered Apr 22 '20 at 00:15

2

Replace time.sleep(3) with cv2.waitKey(3000).

answered Apr 22 '20 at 00:15

duckboycool

2,425
2
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score 1 · Answer 2 · answered Apr 22 '20 at 00:15

1

add cv2.waitKey(0) after cv2.imshow()

answered Apr 22 '20 at 00:15

Nicolas Gervais

33,817
13
115
143

score 0 · Answer 3 · answered Apr 22 '20 at 04:47

0

def detect_pixels():
    txt_parts = {}
    path = r'C:\Users\Singh\Documents\jpgtotxt\rainbow.jpg'
    BRG = cv2.imread(path)
    cv2.imshow('BRG', BRG)
    cv2.waitKey(0)
    cv2.destroyAllWindows()

answered Apr 22 '20 at 04:47

Alan Jones

452
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8
19

Although this code might solve the problem, a good answer should also explain **what** the code does and **how** it helps. – BDL Apr 22 '20 at 11:22

cv2.imshow() doesn't properly display image

3 Answers3