博客
关于我
使用QT显示OpenCV读取的图片
阅读量:261 次
发布时间:2019-03-01

本文共 2729 字,大约阅读时间需要 9 分钟。

OpenCV?QT?????

??

OpenCV?????????GUI?????????????????????????????GUI????????????????Qt?????OpenCV????????

????

?QtCreator???????QMainWindow?????????????QImageShowWidget?????????????QMainWindow?centralwidget??

????

header??

#ifndef QIMAGESHOWWIDGET_H#define QIMAGESHOWWIDGET_H#include 
#include
class QImageShowWidget : public QWidget{ Q_OBJECTpublic: explicit QImageShowWidget(QWidget *parent = nullptr); ~QImageShowWidget(); bool LoadImage(const char *imagePath);protected: void paintEvent(QPaintEvent *event); void Release(); private: uchar *winBuf; int winWidth; int winHeight; int winBandNum;};#endif // QIMAGESHOWWIDGET_H

source??

#include "qimageshowwidget.h"#include 
#include
#include
#include
using namespace cv;using namespace std;QImageShowWidget::QImageShowWidget(QWidget *parent) : QWidget(parent){ setAutoFillBackground(true); setBackgroundRole(QPalette::Base); winBuf = nullptr; winWidth = rect().width(); winHeight = rect().height(); winBandNum = 3;}QImageShowWidget::~QImageShowWidget(){ if (winBuf) { delete[] winBuf; winBuf = nullptr; }}bool QImageShowWidget::LoadImage(const char *imagePath){ Mat img = imread(imagePath); if (img.empty()) { fprintf(stderr, "Can not load image %s\n", imagePath); return false; } Release(); winWidth = rect().width(); winHeight = rect().height(); size_t winBufNum = (size_t)winWidth * winHeight * winBandNum; winBuf = new uchar[winBufNum]; memset(winBuf, 255, winBufNum * sizeof(uchar)); for (int ri = 0; ri < img.rows; ++ri) { for (int ci = 0; ci < img.cols; ++ci) { for (int bi = 0; bi < winBandNum; ++bi) { size_t m = (size_t)winWidth * winBandNum * ri + winBandNum * ci + bi; size_t n = (size_t)img.cols * winBandNum * ri + winBandNum * ci + bi; winBuf[m] = img.data[n]; } } } update(); return true;}void QImageShowWidget::paintEvent(QPaintEvent *event){ if (!winBuf) { return; } QImage::Format imgFormat = QImage::Format_RGB888; QPainter painter(this); QImage qImg(winBuf, winWidth, winHeight, winWidth * winBandNum, imgFormat); painter.drawPixmap(0, 0, QPixmap::fromImage(qImg));}void QImageShowWidget::Release(){ if (winBuf) { delete[] winBuf; winBuf = nullptr; }}

????

?????QImageShowWidget

QImageShowWidget???QWidget?????????????????LoadImage??????????paintEvent?????????

??????

??QPainter??QImage?????winBuf??????????OpenCV?Mat???winBuf????????????????????

????

???????????????????????????

转载地址:http://qawx.baihongyu.com/

你可能感兴趣的文章
MySQL DBA 进阶知识详解
查看>>
Mura CMS processAsyncObject SQL注入漏洞复现(CVE-2024-32640)
查看>>
Mysql DBA 高级运维学习之路-DQL语句之select知识讲解
查看>>
mysql deadlock found when trying to get lock暴力解决
查看>>
MuseTalk如何生成高质量视频(使用技巧)
查看>>
mutiplemap 总结
查看>>
MySQL DELETE 表别名问题
查看>>
MySQL Error Handling in Stored Procedures---转载
查看>>
MVC 区域功能
查看>>
MySQL FEDERATED 提示
查看>>
mysql generic安装_MySQL 5.6 Generic Binary安装与配置_MySQL
查看>>
Mysql group by
查看>>
MySQL I 有福啦,窗口函数大大提高了取数的效率!
查看>>
mysql id自动增长 初始值 Mysql重置auto_increment初始值
查看>>
MySQL in 太多过慢的 3 种解决方案
查看>>
MySQL InnoDB 三大文件日志,看完秒懂
查看>>
Mysql InnoDB 数据更新导致锁表
查看>>
Mysql Innodb 锁机制
查看>>
MySQL InnoDB中意向锁的作用及原理探
查看>>
MySQL InnoDB事务隔离级别与锁机制深入解析
查看>>