我有一个使用 cv2 库的 python 程序,它选择一个随机的美国州,从一个文件夹中提取该州的图像并显示它。它工作正常,所以我保存了它,突然间,它没有显示图像,而是显示一个空白的灰色方块并崩溃。为什么会这样,我该如何解决?这是示例图像:
sample image
second sample image
和继承人的代码:
import cv2
import random
import time
#makes a list of the states
def states():
states = ['alabama','alaska','arizona','arkansas','california',
'colorado','connecticut','deleware','florida','georgia','hawaii',
'idaho','illinois','indiana','iowa','kansas','kentucky','louisiana',
'maine','maryland','massachussets','michigan','minnesota',
'mississipi','missouri','montana','nebraska','nevada',
'new_hampshire','new_jersey','new_mexico','new_york',
'north_carolina','north_dakota','ohio','oklahoma','oregon',
'pennsylvania','rhode_island','south_carolina','south_dakota',
'tennessee','texas','utah','vermont','virginia','washington',
'west_virginia','wisconsin','wyoming']
while True:
#choose a random state from the states list
state = random.choice(states)
#take a picture from the states folder, and display it
img = cv2.imread('picture_files/states/' + state + '.png')
cv2.imshow('guess the state!', img)
#checks if you typed the right state,
#and gives an appropriate response
guess = input("guess the state! (type stop to stop!)\n")
if guess.lower() == state:
print("Correct!")
time.sleep(2)
print("Lets do it again!")
elif guess.lower() == "stop":
break
else:
print("Nope! It was " + state + ". Keep trying!")
time.sleep(2)
if __name__ == '__main__':
states()
最佳答案
基本上你错过了一些 cv2.waitKey()显示图像的函数(另见 here)。
这是一个可能的解决方案示例。
def pick_a_state():
states = ['a','b'] # replace with your list
return random.choice(states)
def show_state(state):
img = cv2.imread(state + '.png', cv2.IMREAD_UNCHANGED)
cv2.imshow('guess the state!', img)
cv2.waitKey(1000)
def get_the_answer(state):
guess = raw_input("guess the state! (type stop to stop!)\n")
if guess.lower() == state:
print(state)
print("Correct!")
time.sleep(2)
print("Lets do it again!")
return 1
elif guess.lower() == "stop":
return 0
else:
print("Nope! It was " + state + ". Keep trying!")
time.sleep(2)
return 1
if __name__ == '__main__':
while True:
state = pick_a_state()
show_state(state)
if get_the_answer(state) == 0:
cv2.destroyAllWindows()
break
请分析代码以了解其工作原理。希望能帮上忙。
关于python - 为什么 cv2 显示空白的灰色方 block ?,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/68633144/