import os
import tkinter as tk
from tkinter import filedialog
import face_recognition


class StudentSignInApp:
    def __init__(self, master):
        self.master = master
        master.title("学生课堂签到软件")

        self.student_images = {}
        self.load_images()

        self.label_instruction = tk.Label(master, text="请选择要识别的图片：")
        self.label_instruction.pack()

        self.button_load_image = tk.Button(master, text="加载图片", command=self.load_image)
        self.button_load_image.pack()

        self.canvas_image = tk.Canvas(master, width=400, height=400)
        self.canvas_image.pack()

        self.label_result = tk.Label(master, text="")
        self.label_result.pack()

        self.button_quit = tk.Button(master, text="退出", command=master.quit)
        self.button_quit.pack()

    def load_images(self):
        for filename in os.listdir("student_images"):
            name, ext = os.path.splitext(filename)
            if ext.lower() in [".jpg", ".png"]:
                image_path = os.path.join("student_images", filename)
                image = face_recognition.load_image_file(image_path)
                encoding = face_recognition.face_encodings(image)[0]
                self.student_images[name] = encoding

    def load_image(self):
        file_path = filedialog.askopenfilename()
        image = face_recognition.load_image_file(file_path)
        face_locations = face_recognition.face_locations(image)
        face_encodings = face_recognition.face_encodings(image, face_locations)
        for face_encoding in face_encodings:
            matches = face_recognition.compare_faces(list(self.student_images.values()), face_encoding)
            if True in matches:
                index = matches.index(True)
                name = list(self.student_images.keys())[index]
                self.label_result.configure(text="恭喜，%s已成功签到！" % name)
            else: self.label_result.configure(text="对不起，未识别出人脸，请重试。")


root = tk.Tk()
app = StudentSignInApp(root)
root.mainloop()

无论识别的是那个人，最后显示出来签到的始终是第一个人？