kivy自定义相机

新版本自定相机使用的时候一定要注意把所有方法和__init__ 放到你要使用的类中
class CustomCamera():    def __init__(self):        self.Flag_list = [0, 1]        self.image_from_camera = []        self.camera_flog = [False]        self.detail_flog = [False]    # 将numpy转为texture    def numpy_to_texture(self, frame, colorfmt='bgr'):        buf1 = cv2.flip(frame, 0)        buf = buf1.tostring()        image_texture = Texture.create(size=(frame.shape[1], frame.shape[0]), colorfmt=colorfmt)        image_texture.blit_buffer(buf, colorfmt=colorfmt, bufferfmt='ubyte')        return image_texture    def cam(self, *kwargs):        ret, frame = self.Flag_list[0].read()        if ret:            node1 = self.numpy_to_texture(frame[:, ::-1, :])            self.image_from_camera.append(node1)            self.camera_to_page()    # 这就是动态显示的模板    def camera_to_page(self):        # 显示相机到页面        if len(self.image_from_camera) >=1:            print("的点点滴滴多多多多多多多多多多")            node1 = self.image_from_camera.pop(0)            self.Flag_list[1].clear_widgets()            if self.camera_flog:                node = Scatter(pos=self.Flag_list[1].pos, size=self.Flag_list[1].size)                with node.canvas:                    Rectangle(size=node.size, texture=node1)                self.Flag_list[1].add_widget(node)                # self.Flag_list[0].add_widget(node2)    # 自定义相机    def coustom_camera(self, par):        self.Flag_list[1] = par        self.camera_flog[0] = not self.camera_flog[0]        if not self.camera_flog[0]:            self.Flag_list[0].release()            self.image_from_camera = []            print("tun off")        try:            cap = cv2.VideoCapture(0)        except:            cap = cv2.VideoCapture(1)        self.Flag_list[0] = cap        if not self.camera_flog[0]:            cap.release()            Clock.unschedule(self.cam)        else:            Clock.schedule_interval(self.cam, 1.0 / 20)
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