使用 PyQt 从 QGIS 插件中拍照

如何解决使用 PyQt 从 QGIS 插件中拍照

我在插件中有一个按钮可以拍照并将其与 QGIS 中的图层特征相关联。

我的目标是选择一个要素，打开相机视图（取景器），拍照并以要素 ID 和日期时间作为文件名保存（例如 20210412-112351_223.jpg）。

为此，我使用下面的代码 based on this post。

问题是，当我在笔记本电脑中使用此插件时，拍摄的图片为 1280x720，但使用 Surface Book 3 时，结果图片为 640x320。

是否可以在代码中设置图片的大小？

from PyQt5.QtWidgets import *
from PyQt5.QtMultimedia import *
from PyQt5.QtMultimediawidgets import *
from qgis.core import (QgsProject,Qgis,QgsExpressionContextUtils)
from qgis.utils import iface

import os
import time

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

        self.setGeometry(0,1280,720)
        self.setStyleSheet("background : lightgrey;")
        self.available_cameras = QCameraInfo.availableCameras()
        
        if not self.available_cameras:
            iface.messageBar().pushMessage('No hay cámaras','El dispositivo no tiene ninguna cámara',level=Qgis.Warning,duration=5)

        self.status = QStatusBar()
        self.status.setStyleSheet("background : white;")
        self.setStatusBar(self.status)
        self.viewfinder = QCameraviewfinder()
        self.viewfinder.show()
        self.setCentralWidget(self.viewfinder)
        self.select_camera(0)
        toolbar = qtoolbar("Cámara")
        self.addToolBar(toolbar)
        click_action = QAction("Hacer foto",self)
        click_action.setStatusTip("Esto hace la foto")
        click_action.setToolTip("Hacer foto")
        click_action.triggered.connect(self.click_photo)
        toolbar.addAction(click_action)
        camera_selector = QComboBox()
        camera_selector.setStatusTip("Cámara frontal / trasera")
        camera_selector.setToolTip("Elegir cámara")
        camera_selector.setToolTipDuration(2500)
        camera_selector.addItems([camera.description()
                                  for camera in self.available_cameras])
        camera_selector.currentIndexChanged.connect(self.select_camera)
        toolbar.addWidget(camera_selector)
        toolbar.setStyleSheet("background : white;")
        self.setwindowTitle("PyQt5 Cam")

    def select_camera(self,i):
        self.camera = QCamera(self.available_cameras[i])
        self.camera.setViewfinder(self.viewfinder)
        self.camera.setCaptureMode(QCamera.CaptureStillImage)
        self.camera.error.connect(lambda: self.alert(self.camera.errorString()))
        self.camera.start()
        self.capture = QCameraimageCapture(self.camera)
        self.capture.error.connect(lambda error_msg,error,msg: self.alert(msg))
        self.capture.imageCaptured.connect(lambda d,i: self.status.showMessage("Imagen tomada: " + str(self.save_seq)))
        self.current_camera_name = self.available_cameras[i].description()

        self.save_seq = 0

    def click_photo(self):
        individuos = QgsProject.instance().mapLayersByName('Individuos')[0]
        individuoSeleccionado = individuos.selectedFeatures()

        for individuo in individuoSeleccionado:
            idind = individuo['id_ind']

        timestamp = time.strftime('%Y%m%d-%H%M%s')
        ruta = 'D:/fotos/'

        self.capture.capture(os.path.join(ruta,"%s_%s.jpg" % (idind,timestamp)))
        self.save_seq += 1

    def alert(self,msg):
        error = QErrorMessage(self)
        error.showMessage(msg)

def abrecamara(self):
    individuos = QgsProject.instance().mapLayersByName('Individuos')[0]
    individuoSeleccionado = individuos.selectedFeatures()
    cuentaIndividuoSeleccionado = len(list(individuoSeleccionado))

    if cuentaIndividuoSeleccionado == 1:
        ventana = creaventana()
        ventana.show()
    elif cuentaIndividuoSeleccionado > 1:
        iface.messageBar().pushMessage('Selección','Solo puede haber un individuo seleccionado',duration=5)
    elif cuentaIndividuoSeleccionado == 0:
        iface.messageBar().pushMessage('Selección','Tiene que haber al menos un individuo seleccionado',duration=5)