在Kivy中显示numpy/opencv/matplotlib映像 [英] Display numpy/opencv/matplotlib image in Kivy
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问题描述
如何在Kivy中以标准numpy/opencv/matplotlib格式显示图像? Kivy使用了不同的图像内存布局,我不知道是哪种布局.
How to display image in standard numpy/opencv/matplotlib format in Kivy? Kivy uses different image memory layout and I can't figure out which one.
以下代码可以正常工作.使用cv2 VideoCapture捕获图像.我认为图像是BGR,数组尺寸为(360,480,3):
The following code works totally fine. Image was captured using cv2 VideoCapture. I think image is BGR, array dimensions are (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:
Trying to display it with the following code produce messy results:
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)
推荐答案
找到正确的转换.可能不是最理想的:
Found the right transformation. Probably suboptimal:
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')
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