Question

我有一个Flask服务器，它通过显示器上的OpenCV显示黑色图像。到达HTTP请求时，它必须在同一窗口上显示另一个图像，该图像的名称是通过参数到达的。在端点“ / destroy”上到达另一个请求之后，必须在同一窗口中显示黑色图像。我不明白为什么这段代码不起作用，您有什么建议吗？为了不阻塞服务器，我需要在端点中使用两个不同的进程，这是使用它们的正确方法吗？

#show black image before the server starts
image = cv2.imread("black.jpg",1)
screen = screeninfo.get_monitors()[1]
cv2.moveWindow("image", screen.x - 1, screen.y - 1)
cv2.imshow("image",image)
cv2.waitKey(1)

def imageShower(name):
    #get name parameter and shows image with that name
    image = cv2.imread(name+".jpg",1)
    cv2.imshow("image",image)
    cv2.waitKey(1)

def imageDestroyer():
    #return to black image
    image = cv2.imread("black.jpg",1)
    cv2.imshow("image",image)
    cv2.waitKey(1)

#at endpoint / start process that invokes imageShower()
@app.route('/')
def showImg():
    #store image name arrived via parameter
    name = request.args.get('name')
    #start process
    p = Process(target=imageShower(name))
    p.start()
    #return back to front-end 
    return "image showed"

#return black image on endpoint "/destroy"
@app.route('/destroy')
def destroy():
    #start process
    pd = Process(target=imageDestroyer)
    pd.start()
    #return back to front-end
    return "returned to black"

如何在Flask和OpenCV中显示图片服务器端？

0 个答案: