Python KivyでOpenCVを使ってWebカメラの映像を表示したい

実現したいこと

OpenCVで読み込んだWebカメラの映像を私の作ったGUIの一部に埋め込みたいと考えております。
しかし、Kivyをはじめて3日の私はどうすればよいか、わかりませんでした。

以下のコードを参考にして、OpenCVのVideoCapture()で読み込んだデータをtextureに変換すればKivyでtextureとして表示できることはわかりました。それの私のコードに実装する方法を教えてください。宜しくお願いします。

埋め込みたい位置は実行して左側のImageです。(Kivy: 18行目)

参考にしたコード

# coding:utf-8
from kivy.app import App
from kivy.uix.image import Image
from kivy.clock import Clock
from kivy.graphics.texture import Texture
import cv2
 
 
class KivyCamera(Image):
    def __init__(self, capture, fps, **kwargs):
        super(KivyCamera, self).__init__(**kwargs)
        self.capture = capture
        Clock.schedule_interval(self.update, 1.0 / fps)
 
    def update(self, dt):
        ret, frame = self.capture.read()
        if ret:
            # convert it to texture
            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')
            # display image from the texture
            self.texture = image_texture
 
 
class CamApp(App):
    def build(self):
        self.capture = cv2.VideoCapture(1)
        self.my_camera = KivyCamera(capture=self.capture, fps=30)
        return self.my_camera
 
    def on_stop(self):
        #without this, app will not exit even if the window is closed
        self.capture.release()
 
 
if __name__ == '__main__':
    CamApp().run()

自分のPythonコード

Python
from kivy.app import App
from kivy.lang import Builder
from kivy.uix.widget import Widget
from kivy.uix.gridlayout import GridLayout
from kivy.uix.label import Label
from kivy.uix.image import Image
from kivy.graphics.texture import Texture
from kivy.properties import ObjectProperty
from kivy.core.window import Window
from kivy.uix.screenmanager import Screen
from kivy.graphics import Color, Rectangle
from kivy.clock import Clock
import cv2
Window.size = (800, 460)

Builder.load_file('sample.kv')

class Screen(Screen):
    
    count = 0
    img_src=''
    posX=100
    posY=200
    R=300
    result='RESULT'
    accuracy=1
    
    def __init__(self, **kwargs):
        
        super(Screen,self).__init__(**kwargs)
    
    def add(self):
            
        self.count += 1
        layout1 = GridLayout(cols=4, size_hint=(1, None), height=60, padding=5)
        layout1.add_widget(Label(text='[' + str(self.count) + ']'))
        layout1.add_widget(Image(source=self.img_src))
        
        layout2 = GridLayout(rows=2)
        layout2.add_widget(Label(text=self.result))
        layout2.add_widget(Label(text=str(self.accuracy)))
        
        layout3 = GridLayout(rows=3)
        layout3.add_widget(Label(text=str(self.posX)))
        layout3.add_widget(Label(text=str(self.posY)))
        layout3.add_widget(Label(text=str(self.R)))
        
        layout1.add_widget(layout2)
        layout1.add_widget(layout3)
        
        self.ids.widget_list.add_widget(layout1)
        
    def remove(self):
        self.ids.widget_list.clear_widgets()
    
            
class SampleApp(App):
    
    def build(self):
        self.capture = cv2.VideoCapture(0)
        self.screen = Screen()
        self.title = 'Sample_Code'
        return self.screen

if __name__ == '__main__':
    SampleApp().run()

自分のKivyコード

Kivy
<Screen>:
    BoxLayout:
        size: root.size
        padding: 10
        orientation: 'vertical'
        BoxLayout:
            size_hint_y: 0.1
            Label:
                text: 'Total number : -----------'
            Label:
                text: 'Total fee : -----------'

        BoxLayout:
            size_hint_y: 0.8
            padding: 10
            Image:
                size_hint_x: 0.6
                texture:
                
            ScrollView:
                size_hint_x: 0.4

                GridLayout:
                    size_hint_y: None
                    height: self.minimum_height
                    id: widget_list
                    cols: 1
                    rows: 20
                    orientation: 'vertical'

                    canvas.before:
                        Color:
                            rgba: 1, 1, 1, 0.2
                        Rectangle:
                            pos: self.pos
                            size: self.size

        AnchorLayout:
            anchor_x: 'right'
            size_hint_y: 0.1
            BoxLayout:
                size_hint: (None, None)
                size: (300, 40)
                BoxLayout:
                    padding: 5
                    Button:
                        text: 'Add'
                        on_press: root.add()
                BoxLayout:
                    padding: 5
                    Button:
                        text: 'Remove'
                        on_press: root.remove()