從相機Pyqt5調整直播幀大小-有解無憂

我使用 pyqt5 創建了三個視窗。它們如下所示。

1. 主視窗

從相機 Pyqt5 調整直播幀大小

單擊開始按鈕后，將打開下一個視窗，如下所示。

2. 中間視窗

從相機 Pyqt5 調整直播幀大小

此視窗接受流鏈接以連接相機。對于普通的 USB 相機，它是“0”。當輸入 0 時，下一個視窗打開。

3.輸出視窗

從相機 Pyqt5 調整直播幀大小

我在這里面臨的問題是我無法調整輸出幀的大小，盡管我可以調整螢屏大小。

** 最后一個視窗的代碼附在下面，**

import sys
from PyQt5.QtGui import *
from PyQt5.QtWidgets import *
from PyQt5.QtCore import *
import cv2
class Ui_OutputDialog(QWidget):
    def __init__(self):
        super(Ui_OutputDialog, self).__init__()

        self.VBL = QVBoxLayout()

        self.FeedLabel = QLabel()
        self.VBL.addWidget(self.FeedLabel)

        self.CancelBTN = QPushButton("Cancel")
        self.CancelBTN.clicked.connect(self.CancelFeed)
        self.VBL.addWidget(self.CancelBTN)

        self.Worker1 = Worker1()

        self.Worker1.start()
        self.Worker1.ImageUpdate.connect(self.ImageUpdateSlot)
        self.setLayout(self.VBL)

    def ImageUpdateSlot(self, Image):
        self.FeedLabel.setPixmap(QPixmap.fromImage(Image))

    def CancelFeed(self):
        self.Worker1.stop()

class Worker1(QThread):
    ImageUpdate = pyqtSignal(QImage)
    def run(self):
        self.ThreadActive = True
        Capture = cv2.VideoCapture(0)
        while self.ThreadActive:
            ret, frame = Capture.read()
            if ret:
                Image = cv2.cvtColor(frame, cv2.COLOR_BGR2RGB)
                FlippedImage = cv2.flip(Image, 1)
                ConvertToQtFormat = QImage(FlippedImage.data, FlippedImage.shape[1], FlippedImage.shape[0], QImage.Format_RGB888)
                Pic = ConvertToQtFormat.scaled(720, 480, Qt.KeepAspectRatio)
                self.ImageUpdate.emit(Pic)
    def stop(self):
        self.ThreadActive = False
        self.quit()

if __name__ == "__main__":
    App = QApplication(sys.argv)
    Root = Ui_OutputDialog()
    Root.show()
    sys.exit(App.exec())

附上第一個檔案的代碼

import sys
from PyQt5.uic import loadUi
from PyQt5 import QtWidgets
from PyQt5.QtCore import pyqtSlot
from PyQt5.QtWidgets import QApplication, QDialog
import resource
from middlewindow import Ui_MiddleDialog 

class Ui_Dialog(QDialog):
    def __init__(self):
        super(Ui_Dialog, self).__init__()
        loadUi("mainwindow.ui", self)

        self.main_click.clicked.connect(self.runmiddlewindow)


    def runmiddlewindow(self):
        """
        Called when the user presses the Run button
        """
        print("Clicked Run")
        ui.hide()  # hide the main window
        self.middleWindow_()  # Create and open new output window

    def middleWindow_(self):
        """
        Created new window for vidual output of the video in GUI
        """
        self._new_window = Ui_MiddleDialog()
        self._new_window.show()
        #self._new_window.startVideo(self.Videocapture_)
        #print("Video Played")


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

附上第一個檔案的用戶界面

<?xml version="1.0" encoding="UTF-8"?>
<ui version="4.0">
 <class>Dialog</class>
 <widget class="QDialog" name="Dialog">
  <property name="geometry">
   <rect>
    <x>0</x>
    <y>0</y>
    <width>508</width>
    <height>259</height>
   </rect>
  </property>
  <property name="minimumSize">
   <size>
    <width>508</width>
    <height>259</height>
   </size>
  </property>
  <property name="maximumSize">
   <size>
    <width>508</width>
    <height>259</height>
   </size>
  </property>
  <property name="windowTitle">
   <string>Face Recognition Time Attendance App</string>
  </property>
  <property name="windowIcon">
   <iconset>
    <normaloff>:iconer.png</normaloff>:iconer.png</iconset>
  </property>
  <property name="styleSheet">
   <string notr="true">background-color: rgb(255, 255, 255);
border-color: rgb(0, 0, 0);</string>
  </property>
  <widget class="QWidget" name="verticalLayoutWidget_2">
   <property name="geometry">
    <rect>
     <x>40</x>
     <y>20</y>
     <width>436</width>
     <height>224</height>
    </rect>
   </property>
   <layout class="QGridLayout" name="gridLayout">
    <item row="2" column="0">
     <widget class="QPushButton" name="main_click">
      <property name="font">
       <font>
        <family>Roboto Condensed Light</family>
        <pointsize>13</pointsize>
       </font>
      </property>
      <property name="styleSheet">
       <string notr="true">background-color: rgb(170, 0, 0);
background-color: qlineargradient(spread:pad, x1:0, y1:0, x2:1, y2:0, stop:0 rgba(0, 0, 0, 255), stop:1 rgba(255, 255, 255, 255));
border-color: rgb(8, 8, 8);
background-color: rgb(147, 147, 147);</string>
      </property>
      <property name="text">
       <string>START</string>
      </property>
     </widget>
    </item>
    <item row="1" column="0">
     <layout class="QHBoxLayout" name="horizontalLayout_3">
      <item>
       <widget class="QLabel" name="logolabel_2">
        <property name="styleSheet">
         <string notr="true">border-color: rgb(11, 11, 11);</string>
        </property>
        <property name="text">
         <string/>
        </property>
        <property name="pixmap">
         <pixmap>loger.png</pixmap>
        </property>
       </widget>
      </item>
      <item>
       <widget class="QLabel" name="filelabel_3">
        <property name="enabled">
         <bool>true</bool>
        </property>
        <property name="font">
         <font>
          <family>Roboto Condensed</family>
          <pointsize>14</pointsize>
          <weight>75</weight>
          <bold>true</bold>
         </font>
        </property>
        <property name="styleSheet">
         <string notr="true">border-color: rgb(12, 12, 12);
border-color: rgb(0, 0, 0);</string>
        </property>
        <property name="text">
         <string>&lt;html&gt;&lt;head/&gt;&lt;body&gt;&lt;p&gt;&lt;span style=&quot; color:#1113aa;&quot;&gt;BARCODE SCANNER&lt;/span&gt;&lt;/p&gt;&lt;/body&gt;&lt;/html&gt;</string>
        </property>
       </widget>
      </item>
     </layout>
    </item>
   </layout>
  </widget>
 </widget>
 <resources>
  <include location="resource.qrc"/>
  <include location="resource.qrc"/>
 </resources>
 <connections/>
</ui>

附上第二個檔案的代碼

from PyQt5.QtGui import QImage, QPixmap
from PyQt5.uic import loadUi
from PyQt5.QtCore import pyqtSlot, QTimer
from PyQt5.QtWidgets import QDialog
import cv2
import numpy as np
import datetime
import os
from lastwindow import Ui_OutputDialog

class Ui_MiddleDialog(QDialog):
    def __init__(self):
        
        super(Ui_MiddleDialog, self).__init__()
        loadUi("./middlewindow.ui", self)
        

        self.press.clicked.connect(self.connect_camera)
        self._new_window = None


    def runmiddlewindow(self):
    
        print("Clicked Run")
        #print(self.Videocapture_)
    
    def connect_camera(self):
        
        stream = self.stream.text()
        self.Videocapture_ = stream
        #ui.hide()  # hide the main window
        self.outputWindow_()  # Create and open new output window

    def outputWindow_(self):
        
        self._new_window = Ui_OutputDialog()
        self._new_window.show()
        #self._new_window.controlTimer(self.Videocapture_)

附上第二個檔案的 UI 檔案

<?xml version="1.0" encoding="UTF-8"?>
<ui version="4.0">
 <class>Dialog</class>
 <widget class="QDialog" name="Dialog">
  <property name="geometry">
   <rect>
    <x>0</x>
    <y>0</y>
    <width>508</width>
    <height>259</height>
   </rect>
  </property>
  <property name="minimumSize">
   <size>
    <width>508</width>
    <height>259</height>
   </size>
  </property>
  <property name="maximumSize">
   <size>
    <width>508</width>
    <height>259</height>
   </size>
  </property>
  <property name="windowTitle">
   <string>Face Recognition Time Attendance App</string>
  </property>
  <property name="windowIcon">
   <iconset>
    <normaloff>iconer.png</normaloff>iconer.png</iconset>
  </property>
  <property name="styleSheet">
   <string notr="true">border-color: rgb(7, 7, 7);</string>
  </property>
  <widget class="QLineEdit" name="stream">
   <property name="geometry">
    <rect>
     <x>10</x>
     <y>120</y>
     <width>481</width>
     <height>24</height>
    </rect>
   </property>
  </widget>
  <widget class="QPushButton" name="press">
   <property name="geometry">
    <rect>
     <x>0</x>
     <y>190</y>
     <width>511</width>
     <height>36</height>
    </rect>
   </property>
   <property name="font">
    <font>
     <family>Roboto Condensed Light</family>
     <pointsize>13</pointsize>
    </font>
   </property>
   <property name="styleSheet">
    <string notr="true">background-color: rgb(170, 0, 0);
background-color: qlineargradient(spread:pad, x1:0, y1:0, x2:1, y2:0, stop:0 rgba(0, 0, 0, 255), stop:1 rgba(255, 255, 255, 255));
border-color: rgb(8, 8, 8);
background-color: rgb(147, 147, 147);</string>
   </property>
   <property name="text">
    <string>CONFIRM</string>
   </property>
  </widget>
  <widget class="QLabel" name="label">
   <property name="geometry">
    <rect>
     <x>10</x>
     <y>40</y>
     <width>491</width>
     <height>51</height>
    </rect>
   </property>
   <property name="text">
    <string>&lt;html&gt;&lt;head/&gt;&lt;body&gt;&lt;p align=&quot;center&quot;&gt;&lt;span style=&quot; font-size:12pt; font-weight:600; color:#1113aa;&quot;&gt;ENTER THE STREAMLINK TO CONNECT&lt;/span&gt;&lt;/p&gt;&lt;/body&gt;&lt;/html&gt;</string>
   </property>
  </widget>
 </widget>
 <resources>
  <include location="../Face_Detection_PyQt_Final/resource.qrc"/>
 </resources>
 <connections/>
</ui>

uj5u.com熱心網友回復：

重新實作resizeEvent設定影像應縮放到的大小。您需要將布局的大小約束設定SetNoConstraint為以使視窗變小和變大。您還應該在停止后釋放捕獲。

class Ui_OutputDialog(QWidget):
    def __init__(self):
        super(Ui_OutputDialog, self).__init__()

        self.VBL = QVBoxLayout()

        self.FeedLabel = QLabel()
        self.VBL.addWidget(self.FeedLabel)

        self.CancelBTN = QPushButton("Cancel")
        self.CancelBTN.clicked.connect(self.CancelFeed)
        self.VBL.addWidget(self.CancelBTN)

        self.Worker1 = Worker1()
        
        self.Worker1.start()
        self.Worker1.ImageUpdate.connect(self.ImageUpdateSlot)
        self.setLayout(self.VBL)

        self.VBL.setSizeConstraint(QLayout.SetNoConstraint)
        self.resize(720, 480)

    def resizeEvent(self, event):
        super().resizeEvent(event)
        self.Worker1.size = self.FeedLabel.size()

    def ImageUpdateSlot(self, Image):
        self.FeedLabel.setPixmap(QPixmap.fromImage(Image))

    def CancelFeed(self):
        self.Worker1.stop()
        

class Worker1(QThread):
    ImageUpdate = pyqtSignal(QImage)
    def run(self):
        self.ThreadActive = True
        Capture = cv2.VideoCapture(0)
        while self.ThreadActive:
            ret, frame = Capture.read()
            if ret:
                Image = cv2.cvtColor(frame, cv2.COLOR_BGR2RGB)
                FlippedImage = cv2.flip(Image, 1)
                ConvertToQtFormat = QImage(FlippedImage.data, FlippedImage.shape[1], FlippedImage.shape[0], QImage.Format_RGB888)
                Pic = ConvertToQtFormat.scaled(self.size, Qt.KeepAspectRatio)
                self.ImageUpdate.emit(Pic)
                
        Capture.release()
        
    def stop(self):
        self.ThreadActive = False
        self.quit()

轉載請註明出處，本文鏈接：https://www.uj5u.com/yidong/365641.html

標籤：Python opencv pyqt5

上一篇：未檢測到代碼時退出PythonQR掃描儀，但在處理代碼時繼續運行

下一篇：opencv無法讀取所有檔案形成路徑