文章参考《Qt5开发及实例(第4版)》陆文周 主编
生成的项目文件夹
INCLUDEPATH += F:\OpenCV4.5.0\opencv\buildmingw\install\include CONFIG(debug, debug|release): { LIBS += F:\OpenCV4.5.0\opencv\buildmingw\install\x64\mingw\bin\libopencv_*d.dll } else:CONFIG(release, debug|release): { LIBS += -LF:\OpenCV4.5.0\opencv\buildmingw\install\x64\mingw\bin\ -llibopencv_core450 \ -llibopencv_highgui450 \ -llibopencv_imgcodecs450 \ -llibopencv_imgproc450 \ -llibopencv_features2d450 \ -llibopencv_calib3d450 }
完成项目配置
属性设置
序号
名称
类型
属性设置
①
viewLabel
QLabel
frameShape:Box
frameShadow:Sunken
②
contrastVerticalSlider
QSlider
maximum:100
value:33
tickPostion:TicksBelow
③
brightnessVerticalSlider
QSlider
maximum:100
④
contrastLabel
QLabel
text:对比度
⑤
brightLabel
QLabel
text:亮度
/**********************界面初始化**************************/ void PictureEnhance::initMainWindow() { QString imgPath = "D:\\Qt\\QtOpencvEnhance\\lena.jpg"; //本地路径(图片直接放在项目目录下) Mat imgData = imread(imgPath.toLatin1().data()); //读取图片数据 cvtColor(imgData,imgData, COLOR_BGR2RGB); //图片格式转换 myImg = imgData; myQImg = QImage((const unsigned char*)(imgData.data), imgData.cols, imgData.rows, QImage::Format_RGB888); imgShow(); } /**********************处理图片*****************************/ void PictureEnhance::imgProc(float con, int bri) { Mat imgSrc = myImg; Mat imgDst = Mat::zeros(imgSrc.size(),imgSrc.type()); //初始生成空的零像素阵列 imgSrc.convertTo(imgDst,-1,con,bri); myQImg = QImage((const unsigned char*)(imgDst.data), imgDst.cols,imgDst.rows, QImage::Format_RGB888); imgShow(); } /**********************显示图片******************************/ void PictureEnhance::imgShow() { ui->ViewLabel->setPixmap(QPixmap::fromImage(myQImg.scaled(ui->ViewLabel->size(),Qt::KeepAspectRatio))); ui->ViewLabel->setScaledContents(true); }
转到uil设置界面,右键对比度滑动条,转到槽
完成槽函数
/***********************对比度滑动条拖动槽*********************************/ void PictureEnhance::on_contrastVerticalSlider_sliderMoved(int position) { imgProc(position / 33.3,0); } /***********************对比度滑动条值改变槽***************************/ void PictureEnhance::on_contrastVerticalSlider_valueChanged(int value) { imgProc(value / 33.3,0); } /****************************亮度滑动条拖动槽*****************************/ void PictureEnhance::on_brightnessVerticalSlider_sliderMoved(int position) { imgProc(1.0,position); } /**************************亮度滑动条值改变槽************************/ void PictureEnhance::on_brightnessVerticalSlider_valueChanged(int value) { imgProc(1.0,value); }
运行效果: