Question

python newbie here我有以下代码，我用它来使用opencv捕获图片。当我按下键盘上的 q 键时，它会拍摄照片。到目前为止工作正常。

import cv2


cap = cv2.VideoCapture(0)

while(True):
    ret, frame = cap.read()
    rgb = cv2.cvtColor(frame, cv2.COLOR_BGR2BGRA)

    cv2.imshow('frame', rgb)
    if cv2.waitKey(1) & 0xFF == ord('q'):
        out = cv2.imwrite('capture.jpg', frame)
        break

cap.release()
cv2.destroyAllWindows()

当我发出命令时，我需要它来捕获图片（比如'立即捕获'）。当用户提供书面命令而不是按键时，任何人都可以帮助我捕获帧。感谢

Answer 1

你可以这样写

reqCommand = 'Capture_pic'
command = input('Enter command')
if command == reqCommand:
    out = cv2.imwrite('capture.jpg', frame)

更新

此更新旨在使其无法阻止程序的执行

import cv2
import threading

command = None

def process():
    while True:
        command = input('Enter command')

thread = threading.Thread(target=process)
thread.start()

cap = cv2.VideoCapture(0)
reqCommand = 'Capture_pic'
while(True):
    ret, frame = cap.read()
    rgb = cv2.cvtColor(frame, cv2.COLOR_BGR2BGRA)

    cv2.imshow('frame', rgb)
    if command == reqCommand:
        out = cv2.imwrite('capture.jpg', frame)
        thread.terminate()
        break

cap.release()
cv2.destroyAllWindows()

如何在opencv中捕获图片

1 个答案: