QSlider 值更改后 Pyqtgraph ImageView 未更新

Question

我正在开发 PyQt5 + pyqtgraph 用户界面。主要想法是拥有一个图像查看器，我可以使用 Main Window 中的小部件对其进行更新，例如滑块、行编辑、按钮......现在我在移动切片器时无法更新图像。它连接到预期的功能，但 ImageViewer 上的图像始终保持相同（第一个）。我该如何解决这个问题？我知道 pyqtgraph ImageViewer 可以处理 3D 数组，但在未来，我将不得不添加多个将由同一个滑块更新的查看器。这是我的代码：

我使用的这个 HDF5 文件是一个 (2048, 2048, 10) 大小的数组（里面有 10 uint16 个图像）。

from PyQt5 import QtGui, QtWidgets, uic
import pyqtgraph as pg
import numpy as np
import os, sys, h5py

class ZoomGUI:
    def __init__(self, parent=None):
        self.ui = uic.loadUi(os.path.dirname(os.path.realpath(__file__)) + '/GUI/ZoomGUI.ui')

        self.file_path = "recon/tomo-2048x2048x10_16bit.h5"

        #Configure slices slicer
        self.number_of_slices = self.get_number_of_slices()
        self.ui.slicesSlider.setMaximum(self.number_of_slices-1)
        self.ui.slicesSlider.valueChanged.connect(self.imageView)
        self.updateImage()

        #Add image widget
        self.ui.ImageWidget.setLayout(QtGui.QVBoxLayout())
        self.ui.ImageWidget.layout().addWidget(self.imv)


    def imageView(self,slice_number):
        self.imv = pg.ImageView()
        self.imagedata = self.get_image(slice_number)
        print(self.imagedata)
        self.imv.setImage(self.imagedata)

    def updateImage(self):
        actual_slice = int(self.ui.slicesSlider.value())
        self.imageView(actual_slice)

    #File related functions
    def get_image(self, slice_number):
        h5 = h5py.File(self.file_path, "r")
        data = h5["slices"][slice_number]
        h5.close()
        return(data)

    def get_number_of_slices(self):
        h5 = h5py.File(self.file_path, "r")
        size = len(h5["slices"])
        h5.close()
        return(size)

if __name__ == '__main__':
    app = QtGui.QApplication(sys.argv)      
    ZoomGUI = ZoomGUI()               
    ZoomGUI.ui.show()                  
    app.exec_()

这是 .ui 文件。它只有滑块和一个 QWidget 小部件。

<?xml version="1.0" encoding="UTF-8"?>
<ui version="4.0">
 <class>MainWindow</class>
 <widget class="QMainWindow" name="MainWindow">
  <property name="geometry">
   <rect>
    <x>0</x>
    <y>0</y>
    <width>1132</width>
    <height>880</height>
   </rect>
  </property>
  <property name="windowTitle">
   <string>MainWindow</string>
  </property>
  <widget class="QWidget" name="centralwidget">
   <layout class="QGridLayout" name="gridLayout_2">
    <item row="0" column="0">
     <layout class="QGridLayout" name="gridLayout">
      <item row="0" column="0">
       <layout class="QGridLayout" name="ImageWidgetLayout">
        <item row="0" column="0">
         <widget class="QWidget" name="ImageWidget" native="true"/>
        </item>
       </layout>
      </item>
      <item row="2" column="0">
       <widget class="QPushButton" name="pushButton">
        <property name="text">
         <string>PushButton</string>
        </property>
       </widget>
      </item>
      <item row="1" column="0">
       <widget class="QSlider" name="slicesSlider">
        <property name="orientation">
         <enum>Qt::Horizontal</enum>
        </property>
       </widget>
      </item>
     </layout>
    </item>
   </layout>
  </widget>
  <widget class="QMenuBar" name="menubar">
   <property name="geometry">
    <rect>
     <x>0</x>
     <y>0</y>
     <width>1132</width>
     <height>26</height>
    </rect>
   </property>
  </widget>
  <widget class="QStatusBar" name="statusbar"/>
 </widget>
 <resources/>
 <connections/>
</ui>

Answer 1

您正在创建一个尚未添加到 window 中的新 ImageView，因此您看不到更改，解决方案是只创建一次 ImageView，然后重新使用它

class ZoomGUI:
    def __init__(self, parent=None):
        self.ui = uic.loadUi(
            os.path.dirname(os.path.realpath(__file__)) + "/GUI/ZoomGUI.ui"
        )

        self.file_path = "recon/tomo-2048x2048x10_16bit.h5"

        # Add image widget
        lay = QtGui.QVBoxLayout(self.ui.ImageWidget)
        self.imv = pg.ImageView()
        lay.addWidget(self.imv)

        # Configure slices slicer
        self.number_of_slices = self.get_number_of_slices()
        self.ui.slicesSlider.setMaximum(self.number_of_slices - 1)
        self.ui.slicesSlider.valueChanged.connect(self.imageView)

        self.imageView(self.ui.slicesSlider.value())

    def imageView(self, slice_number):

        imagedata = self.get_image(slice_number)
        print(imagedata)
        self.imv.setImage(imagedata)

    def get_image(self, slice_number):
        h5 = h5py.File(self.file_path, "r")
        data = h5["slices"][slice_number]
        h5.close()
        return data

    def get_number_of_slices(self):
        h5 = h5py.File(self.file_path, "r")
        size = len(h5["slices"])
        h5.close()
        return size

QSlider 值更改后 Pyqtgraph ImageView 未更新

Pyqtgraph ImageView not updating after QSlider value changed

python

python-3.x

pyqt

pyqt5

pyqtgraph