Qt Installation and Setup in Linux with OpenCV||Embedded Object Detection Project (Part 2)

Qt Installation and Setup in Linux with OpenCV || Qt with OpenCV - Embedded Object Detection Project using Hikvision Industrial Camera (Part 2)

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Hi! This is my second post on Qt development about how to set up Qt with opencv in Linux System, compared with the last blog talking about Windows environment. Thanks for ur support and don’t forget to click the “Follow” button to keep up with the project !! Enjoyyyyyyy!

Qt Installation and Setup in Linux with OpenCV

Installing and Configuring OpenCV

Download :

Choose the source code of the opencv 4.5.5 (recommend )

If you encounter difficulties accessing the official OpenCV website which may require VPN
you can visit the Mirrored Site

Install and Configure :

To install and configure OpenCV, you can follow the steps outlined in the Reference article.

Configuring Qt Project to Use OpenCV Library

INCLUDEPATH +=  /home/orin/opencv/opencv-4.5.5\
               /home/orin/opencv/opencv-4.5.5/include\
               /home/orin/opencv/opencv-4.5.5/include/opencv2

LIBS += /home/orin/opencv/build/lib/libopencv_highgui.so \
       /home/orin/opencv/build/lib/libopencv_highgui.so.405 \
       /home/orin/opencv/build/lib/libopencv_core.so    \
       /home/orin/opencv/build/lib/libopencv_imgproc.so \
       /home/orin/opencv/build/lib/libopencv_imgcodecs.so

Example code

Replace “path_to_image” with the actual path to your image file.
Windows path: D://document//image//44.jpg
Linux path: /home/orin/document/image/44.jpg

#include <QApplication>
#include <opencv2/opencv.hpp>

int main(int argc, char *argv[])
{
    QApplication a(argc, argv);

    // Create OpenCV window
    cv::namedWindow("Image", cv::WINDOW_NORMAL);

    // Load image
    cv::Mat image = cv::imread("path_to_your_image.jpg");

    // Display the image
    cv::imshow("Image", image);

    // 等待键盘输入，以保持窗口打开
    cv::waitKey(0);

    return a.exec();
}

Problems still to be solved

#include <opencv2/opencv.hpp>
#include <iostream>

using namespace cv;
using namespace std;

int main() {

   cv::Mat image = cv::Mat::zeros(400, 400, CV_8UC3);

      // 创建一个矩形框
      cv::Rect boundingRect(100, 100, 200, 200);

      // 在图像上绘制矩形
      cv::rectangle(image, boundingRect, cv::Scalar(0, 255, 0), 109);

      // 显示图像
      cv::imshow("Rectangle Test", image);
      cv::waitKey(0);
}

In the image titled ‘Rectangle Test’ (shown in the link), it can be observed that there is no rectangle present. Despite my efforts, I have been unable to resolve this issue thus far. If you possess knowledge regarding the cause of the problem or have a potential solution, please reach out to me via private message. I would be grateful for your assistance, and I am looking forward to updating the blog post with your name credited for providing the solution.文章来源地址https://www.toymoban.com/news/detail-826653.html

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