Question

from picamera.array import PiRGBArray
from picamera import PiCamera
import time
import cv2
import imutils

camera = PiCamera()
camera.resolution = (640, 480)
camera.framerate = 32
rawCapture = PiRGBArray(camera, size=(640,480))


time.sleep(0.1)

for frame in camera.capture_continuous(rawCapture, format="bgr", use_video_port=True):
    image = frame.array
    #cv2.imshow("frame", image)

    gray = cv2.cvtColor(frame.array, cv2.COLOR_BGR2GRAY)[1]
    #cv2.imshow("Gray", gray)

    thresh = cv2.threshold(gray, 225, 255, cv2.THRESH_BINARY)[1]
    #cv2.imshow("Thresh", thresh)

    cnts = cv2.findContours(thresh.copy(), cv2.RETR_EXTERNAL, cv2.CHAIN_APPROX_SIMPLE)
    cnts = cnts[0] if imutils.is_cv2() else cnts[1]
    output = thresh.copy()

    cv2.imshow("frame", image)
    cv2.imshow("Gray", gray)
    cv2.imshow("Thresh", thresh)

    key = cv2.waitKey(1) & 0xFF

    rawCapture.truncate(0)

    if key == ord("q"):
        break

伙计们，当我在带有opencv的虚拟环境中运行上述代码时，我正在运行raspbian的raspberry pi 3 b +上的python 3.5.3上运行opencv 3.3.0，它可以编译并运行，但无法正常工作。框架窗口显示并更新良好，但打开了灰色和脱粒框架，然后宽度接近0。我附上一张照片，如果有人有任何深刻见解。desktop

Answer 1

尝试更改

gray = cv2.cvtColor(frame.array, cv2.COLOR_BGR2GRAY)[1]

简单

gray = cv2.cvtColor(frame.array, cv2.COLOR_BGR2GRAY)

树莓派opencv视频窗口无法正确显示

1 个答案: