Question

这是场景。首先，我想将图像上传到GUI。稍后按下另一个按钮，我想处理这个上传的图像。现在，我能够在GUI中显示图像。但我对如何获取此图像的名称一无所知，因此我按下另一个按钮处理此图像。现在这是我的代码：

from PyQt4 import QtGui, QtCore
from PyQt4.QtGui import *
import sys
import cv2
from sklearn.externals import joblib
from sklearn.svm import LinearSVC
from skimage.feature import hog
import numpy as np
import os.path

class MainWindow(QtGui.QMainWindow):

    def __init__(self):
        super(MainWindow, self).__init__()        
        self.setGeometry(100, 100, 1000,600)
        self.setWindowTitle("HandWritten Image Recognition")

        extractAction = QtGui.QAction("&Quit", self)
        extractAction.setShortcut("Ctrl+Q")
        extractAction.setStatusTip("Leave the App")
        extractAction.triggered.connect(self.close_application)

        openFile = QtGui.QAction("&Open File", self)
        openFile.setShortcut("Ctrl+O")
        openFile.setStatusTip("Open File")
        openFile.triggered.connect(self.file_open)

        processImage = QtGui.QAction("&Process Image", self)
        processImage.setShortcut("Ctrl+A")
        processImage.setStatusTip("Process Image")
        processImage.triggered.connect(self.process_image)

        mainMenu = self.menuBar()

        fileMenu = mainMenu.addMenu('&File') 
        fileMenu.addAction(openFile)
        fileMenu.addAction(processImage)        
        fileMenu.addAction(extractAction)

   def file_open(self):
        # This function is called when the user clicks File->Open.
        filename = QtGui.QFileDialog.getOpenFileName()
        print(filename)
        label = QtGui.QLabel(self)
        label.setGeometry(QtCore.QRect(0, 20, 1000, 580))
        label.setSizePolicy(QtGui.QSizePolicy.Preferred,QtGui.QSizePolicy.Preferred)
        label.setScaledContents(True)
        pixmap = QtGui.QPixmap(filename)
        label.setPixmap(pixmap)
        label.show()

    def process_image(self):
        ###Get Uploaded Image's Name

    def close_application(self):
        print("Why so hurry!!!")
        sys.exit()

def main():
    app = QtGui.QApplication(sys.argv)
    win = MainWindow()
    win.show()
    app.exec_()

if __name__ == '__main__':
    sys.exit(main())

现在，在process_image函数中，我想使用上传的图像，所以我可以进一步处理它。所以，为此，我想知道上传图像的文件路径。请在这里指导我。

Answer 1

这很简单。请将filename设置为self对象的变量image。请将以下代码添加到您的函数process_image：

os.path.basename(str(self.image))

请在此处找到更新的代码：

from PyQt4 import QtGui, QtCore
from PyQt4.QtGui import *
import sys
import cv2
from sklearn.externals import joblib
from sklearn.svm import LinearSVC
from skimage.feature import hog
import numpy as np
import os.path

class MainWindow(QtGui.QMainWindow):

    def __init__(self):
        super(MainWindow, self).__init__()        
        self.setGeometry(100, 100, 1000,600)
        self.setWindowTitle("HandWritten Image Recognition")

        extractAction = QtGui.QAction("&Quit", self)
        extractAction.setShortcut("Ctrl+Q")
        extractAction.setStatusTip("Leave the App")
        extractAction.triggered.connect(self.close_application)

        openFile = QtGui.QAction("&Open File", self)
        openFile.setShortcut("Ctrl+O")
        openFile.setStatusTip("Open File")
        openFile.triggered.connect(self.file_open)

        processImage = QtGui.QAction("&Process Image", self)
        processImage.setShortcut("Ctrl+A")
        processImage.setStatusTip("Process Image")
        processImage.triggered.connect(self.process_image)

        mainMenu = self.menuBar()

        fileMenu = mainMenu.addMenu('&File') 
        fileMenu.addAction(openFile)
        fileMenu.addAction(processImage)        
        fileMenu.addAction(extractAction)

    def file_open(self):
        # This function is called when the user clicks File->Open.
        filename = QtGui.QFileDialog.getOpenFileName()
        print(filename)
        self.image = filename  #Assign filename to object's variable 'image'
        label = QtGui.QLabel(self)
        label.setGeometry(QtCore.QRect(0, 20, 1000, 580))
        label.setSizePolicy(QtGui.QSizePolicy.Preferred,QtGui.QSizePolicy.Preferred)
        label.setScaledContents(True)
        pixmap = QtGui.QPixmap(filename)
        label.setPixmap(pixmap)
        label.show()

    def process_image(self):
        print os.path.basename(str(self.image))  #Get only file name with it's extension

    def close_application(self):
        print("Why so hurry!!!")
        sys.exit()

def main():
    app = QtGui.QApplication(sys.argv)
    win = MainWindow()
    win.show()
    app.exec_()

if __name__ == '__main__':
    sys.exit(main())

如何将GUI上传的图像名称传递给其他功能？

1 个答案: