在Kivy中显示numpy/opencv/matplotlib图像

Question

如何在Kivy中以标准numpy/opencv/matplotlib格式显示图像？Kivy使用不同的图像内存布局,我无法弄清楚哪一个.

以下代码完全正常.使用cv2 VideoCapture捕获图像.我认为图像是BGR,数组尺寸是(360,480,3):

    ret, image = video_capture.read()
    cv2.imshow('image', image)
    cv2.waitKey()

尝试使用以下代码显示它会产生混乱的结果:

    video_texture = Texture.create(size=image.shape[:2])
    video_texture.blit_buffer(image.tostring(), colorfmt='rgb', bufferfmt='ubyte')

    # ...

    video_panel = self.ids['video_panel']
    with video_panel.canvas:
        Rectangle(texture=video_texture, pos=video_panel.pos, size=video_panel.size)

Answer 1

找到了正确的转变。可能不是最理想的：

    ret, image = video_capture.read()
    image = np.rot90(np.swapaxes(image, 0, 1))
    video_texture = Texture.create(size=(image.shape[1], image.shape[0]), colorfmt='rgb')
    video_texture.blit_buffer(image.tostring(), colorfmt='bgr', bufferfmt='ubyte')