用pyqt5写一个图像对比评价的页面

以下是一个简单的图像对比评价页面的示例代码，使用PyQt5编写：

import sys
from PyQt5.QtWidgets import QApplication, QMainWindow, QWidget, QHBoxLayout, QVBoxLayout, QLabel, QPushButton
from PyQt5.QtGui import QPixmap, QImage, QPainter, QColor
from PyQt5.QtCore import Qt


class MainWindow(QMainWindow):
    def __init__(self):
        super().__init__()

        self.setWindowTitle("图像对比评价页面")
        self.setFixedSize(800, 600)

        central_widget = QWidget(self)
        self.setCentralWidget(central_widget)

        hbox = QHBoxLayout()

        # 显示左侧图像的标签
        self.left_image_label = QLabel()
        self.left_image_label.setAlignment(Qt.AlignCenter)
        hbox.addWidget(self.left_image_label)

        # 显示右侧图像的标签
        self.right_image_label = QLabel()
        self.right_image_label.setAlignment(Qt.AlignCenter)
        hbox.addWidget(self.right_image_label)

        central_widget.setLayout(hbox)

        # 显示对比结果的标签
        self.result_label = QLabel()
        self.result_label.setAlignment(Qt.AlignCenter)
        self.result_label.setFixedHeight(100)
        vbox = QVBoxLayout()
        vbox.addWidget(self.result_label)
        central_widget.layout().addLayout(vbox)

        # 按钮布局
        button_hbox = QHBoxLayout()

        # 加载左侧图像的按钮
        self.left_load_button = QPushButton("加载左侧图像")
        self.left_load_button.clicked.connect(self.load_left_image)
        button_hbox.addWidget(self.left_load_button)

        # 加载右侧图像的按钮
        self.right_load_button = QPushButton("加载右侧图像")
        self.right_load_button.clicked.connect(self.load_right_image)
        button_hbox.addWidget(self.right_load_button)

        # 对比图像并显示结果的按钮
        self.compare_button = QPushButton("对比图像")
        self.compare_button.clicked.connect(self.compare_images)
        button_hbox.addWidget(self.compare_button)

        vbox.addLayout(button_hbox)

        # 初始化图像数据
        self.left_image_data = None
        self.right_image_data = None

    def load_left_image(self):
        filename, _ = QFileDialog.getOpenFileName(self, "选择左侧图像", "", "Images (*.png *.xpm *.jpg *.bmp)")
        if filename:
            self.left_image_data = QImage(filename)
            self.left_image_label.setPixmap(QPixmap.fromImage(self.left_image_data))

    def load_right_image(self):
        filename, _ = QFileDialog.getOpenFileName(self, "选择右侧图像", "", "Images (*.png *.xpm *.jpg *.bmp)")
        if filename:
            self.right_image_data = QImage(filename)
            self.right_image_label.setPixmap(QPixmap.fromImage(self.right_image_data))

    def compare_images(self):
        if self.left_image_data is None or self.right_image_data is None:
            self.result_label.setText("请先加载两张图像")
            return

        # 比较图像像素值的差异
        diff = 0
        for i in range(self.left_image_data.width()):
            for j in range(self.left_image_data.height()):
                left_color = QColor(self.left_image_data.pixel(i, j))
                right_color = QColor(self.right_image_data.pixel(i, j))
                diff += abs(left_color.red() - right_color.red())
                diff += abs(left_color.green() - right_color.green())
                diff += abs(left_color.blue() - right_color.blue())

        # 显示对比结果
        self.result_label.setText("图像差异值为: {}".format(diff))


if __name__ == "__main__":
    app = QApplication(sys.argv)
    window = MainWindow()
    window.show()
    sys.exit(app.exec_())

运行示例代码，会弹出一个窗口，包含两个用于显示图像的标签和三个按钮，分别用于加载左侧图像、加载右侧图像和对比图像，并在下方显示对比结果。用户可以点击“加载左侧图像”按钮和“加载右侧图像”按钮，选择两张图像进行加载。加载完成后，用户可以点击“对比图像”按钮，程序会计算两张图像的像素值差异，并在下方显示对比结果。