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        在 Kivy 中显示 numpy/opencv/matplotlib 图像

        Display numpy/opencv/matplotlib image in Kivy(在 Kivy 中显示 numpy/opencv/matplotlib 图像)
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                • 本文介绍了在 Kivy 中显示 numpy/opencv/matplotlib 图像的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着跟版网的小编来一起学习吧!

                  问题描述

                  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,我不知道是哪一个.

                  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.

                  以下代码完全正常.使用 cv2 VideoCapture 捕获图像.我认为图像是 BGR,数组维度是 (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

                  找到了正确的转换.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')
                  

                  这篇关于在 Kivy 中显示 numpy/opencv/matplotlib 图像的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持跟版网!

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