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RaspberryPiでリアルタイム顔検出

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#今回やること
RaspberryPiとWebカメラを使ってリアルタイム顔検出

#環境
Rasbian(RaspberryPi 4)
Python
Opencv

#処理
###カスケード分類器のインストール

git clone https://github.com/opencv/opencv

###コード
git cloneしたのと同じフォルダにコードを作成し、実行する必要があります。
(パスを変えればどこでもよい)

import tkinter
import cv2
import PIL.Image, PIL.ImageTk


class App:
    def __init__(self, window, window_title):
        self.window = window
        self.window.title(window_title)

        self.vcap = cv2.VideoCapture(0)
        self.width = self.vcap.get(cv2.CAP_PROP_FRAME_WIDTH)
        self.height = self.vcap.get(cv2.CAP_PROP_FRAME_HEIGHT)

        self.canvas = tkinter.Canvas(window, width=self.width, height=self.height)
        self.canvas.pack()

        self.close_btn = tkinter.Button(window, text="Close")
        self.close_btn.pack()
        self.close_btn.configure(command=self.destructor)

        self.delay = 15
        self.update()

        self.window.mainloop()

    def update(self):
        _, frame = self.vcap.read()
        frame = cv2.cvtColor(frame, cv2.COLOR_BGR2RGB)

        cascade_path = "./opencv/data/haarcascades/haarcascade_frontalface_alt.xml"
        cascade = cv2.CascadeClassifier(cascade_path)
       faces=cascade.detectMultiScale(frame, scaleFactor=1.1, minNeighbors=1, minSize=(10,10))

        for x,y,w,h in faces:
            cv2.rectangle(frame, (x,y), (x+w, y+h), (0, 0, 255), thickness=30)

        self.photo = PIL.ImageTk.PhotoImage(image = PIL.Image.fromarray(frame))
        self.canvas.create_image(0, 0, image = self.photo, anchor = tkinter.NW)
        self.window.after(self.delay, self.update)

    def destructor(self):
        self.window.destroy()
        self.vcap.release()

App(tkinter.Tk(), "Tkinter & Camera module")

#参考
https://yamitomo.com/article/133
https://www.argocorp.com/UVC_camera/Sample_OpenCV_cascade.detectMultiScale.html

#注意書き
とりあえずやってみました。
めちゃくちゃ遅いです。
詳細の解説や改良、カメラモジュールでの確認は気が向いたらやっていきます。

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