python - 关闭图像窗口会显示另一个窗口。为什么？

Question

我被卡住了。我的代码很烂。我的贴图机也不起作用，但是无限的图像窗口让我发疯。当我关闭namedWindow时，它将打开一个带有图像的新显示窗口(无限)。救命？

import numpy as np
import cv2
from pylepton import Lepton

#setup the Lepton image buffer
def capture(device = "/dev/spidev0.0"):
    with Lepton() as l:
      a,_ = l.capture()     #grab the buffer
    cv2.normalize(a, a, 0, 65535, cv2.NORM_MINMAX) # extend  contrast
    np.right_shift(a, 8, a) # fit data into 8 bits
    return np.uint8(a)


#Create a window and give it features
def nothing(x):
    pass
cv2.namedWindow('flir', cv2.WINDOW_NORMAL)
cv2.moveWindow('flir',1,1)
cv2.createTrackbar('thresh','flir',50,100,nothing)
cv2.createTrackbar('erode','flir',5,100,nothing)
cv2.createTrackbar('dilate','flir',7,100,nothing)

#process the buffer into an image on a continuous loop    
while True:

    #update the image processing variables
    thresh = cv2.getTrackbarPos('thresh', 'flir')
    erodeSize = cv2.getTrackbarPos('erode', 'flir')
    dilateSize = cv2.getTrackbarPos('dilate', 'flir')

    image = capture()

    #apply some image processing
    blurredBrightness = cv2.bilateralFilter(image,9,150,150)
    thresh = 50
    edges = cv2.Canny(blurredBrightness,thresh,thresh*2, L2gradient=True)
    _,mask = cv2.threshold(blurredBrightness,200,1,cv2.THRESH_BINARY)
    erodeSize = 5
    dilateSize = 14
    eroded = cv2.erode(mask, np.ones((erodeSize, erodeSize)))
    mask = cv2.dilate(eroded, np.ones((dilateSize, dilateSize)))
    adjusted_image = cv2.resize(cv2.cvtColor(mask*edges, cv2.COLOR_GRAY2RGB) | image, (640, 4$
    final_image = cv2.applyColorMap(adjusted_image, cv2.COLORMAP_HOT)

    #display the image
    cv2.imshow('flir', final_image)

    if cv2.waitKey(1) == ord('q'):
        break

cv2.waitKey()
cv2.destroyWindow('flir')

Answer 1

首先，冷静点。

其次，仔细查看您的代码。由于以下几行，关闭窗口对您没有任何好处:
cv2.imshow('flir', final_image)和

cv2.destroyWindow('flir')

这两个 Action 是在一个新窗口中显示一个框架，然后销毁它，然后在 imshow中重新创建该窗口，然后显示下一个框架并销毁它，依此类推。

那应该可以解释您闪烁的窗口。

为了停止执行程序，您添加了以下代码:

 if cv2.waitKey(1) == ord('q'):
        break

这意味着当您在图像窗口处于焦点状态时按键盘上的“q”时，while循环将中断并且程序将终止。

因此，我建议您删除 cv2.destroyWindow并使用“q”键退出应用程序，而不要使用鼠标关闭它。