kivy texture图片格式和opencv numpy图片格式互转

 # 将Texture格式的图片对象转换为numpy
    def texture_to_numpy(self,data):
        image=numpy.asarray(bytearray(data.pixels), dtype='uint8').reshape((data.height,data.width,4))
        r_chanel=numpy.copy(image[:,:,0])
        g_chanel=numpy.copy(image[:,:,1])
        b_chanel=numpy.copy(image[:,:,2])
        image[:, :, 0]=b_chanel
        image[:, :, 1]=g_chanel
        image[:, :, 2]=r_chanel

# 将numpy格式图片对象转为Texture 
    def numpy_to_texture(self,frame):
        # frame=cv2.imread("ddd.jpg")
        buf1 = cv2.flip(frame, 0)
        buf = buf1.tostring()
        image_texture = Texture.create(size=(frame.shape[1], frame.shape[0]), colorfmt='bgr')
        image_texture.blit_buffer(buf, colorfmt='bgr', bufferfmt='ubyte')

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