天天向上

 
References:

1. Intel OpenVINO介紹及樹莓派、Linux的安裝
2. OpenVINO Windows下的环境变量固定
3. opencv深度神经网络模块dnn已经支持cuda
4. eddex/tiny-yolov3-on-intel-neural-compute-stick-2

[Design Pattern] 代理模式 (Proxy Pattern)
 
3.2 代理模式優缺點
優點

C++ Qt 82 - Custom QGraphicsItem
Qt C++ 02 Mouse Scrolling with Custom Graphics View
Qt Training: Graphics View (part 2/3): Transformations and Coordinate Systems

In this web site, it provides a lot of benchmark for multiple object tracking.

This time we are going to create a new Object intead of using subclass of QThread,and all its job is transfer to a QThread instance by calling moveToThread method.You can find out details on youtube.
Let’s create a new project of window application and add new class, in which it accumaltes from 1 to 999. 

A good example for writing QThread with a GUI.
Here is another similar example:QT5 TUTORIAL QTHREADS - GUI THREAD - 2020

A good example that help you learn how to handle mouse events

cv::Mat img(cv::Size(800, 800), CV_8UC3);

 // big region of interest (ROI)

 Rect roi(100, 100, 400, 400);

 rectangle(img, roi, Scalar(255, 0, 0), 1);

 // some rectangles

 vector<Rect> lpROIs;

 lpROIs.push_back(Rect(30, 50, 100, 100));

 lpROIs.push_back(Rect(420, 250, 100, 100));

 lpROIs.push_back(Rect(150, 140, 100, 100));

 lpROIs.push_back(Rect(300, 100, 100, 100));

 lpROIs.push_back(Rect(250, 250, 100, 100));

 lpROIs.push_back(Rect(300, 450, 100, 100));

 // check out if the rectangle inside the ROI

 for(int i=0; i<lpROIs.size(); i++)

 {

 // inside the ROI

 if( (roi&lpROIs[i])==lpROIs[i] )

 rectangle(img, lpROIs[i], Scalar(0,0,255), -1);

 else

 rectangle(img, lpROIs[i], Scalar(0,255,0), 1);

 }

 imshow("img", img);

 waitKey();

A good example that shows image processing by using OpenCV with Qt IDE.

First, set up OpenCV building environments

INCLUDEPATH += C:\OpenCV\OpenCV4.2.0DNN\include

LIBS += -LC:\OpenCV\OpenCV4.2.0DNN\lib \

-lopencv_world420