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Install opencv4.1.1 under Ubuntu 16.04 (learn from many articles, climb a few pits) Download First go to github to download the corresponding opencv version and opencv_contrib version. I downloaded opencv 4.1.1, so contrib also needs to download ...

OpenCV Notes ndarray in Numpy The Python API for OpenCV is Numpy-based and is an open-source numeric computation extension of Python for storing and processing multidimensional arrays. Its core data structure is ndarray. ndarray object 1. Constru ...

Links to the original text: https://zhuanlan.zhihu.com/p/78608878 Automatic mine clearance is generally divided into two kinds, one is to read memory data, and the other is to get data by analyzing pictures, and through the simulation of ...

After two days, we finally got it, Big Head!! First used VS2019, compiled four or five times has been unsuccessful, angry, uninstall VS2019, CUDA, reinstall VS2017, CUDA, and then a success, is so amazing! Important Reference Articles: Configuration process 1. Install VS2017 first, you must instal ...

Joint Development of Qt and Opencv qt installation opencv installation qt configuration opencv environment Mat qimage inversion Yx_opencv_ImgChange class Opencv Image Change Yx_opencv_Enhance Class Opencv Image Geometric Transform Yx_opencv_Enhance Class Opencv Image Enhancement Yx_opencv_Geom Class ...

First, read the image and gray it. cv::Mat srcImg = cv::imread("group.jpg"); if (srcImg.empty()) { cout << "error"; return -1; } cv::namedWindow("SRC", CV_WINDOW_AUTOSIZE); cv::imshow("SRC", srcImg); cv::Mat srcGray; cv::cvtColor(srcImg, srcGray, cv::COLOR_RGB2GRAY); cv::namedWin ...

OpenCV Image Processing-Mat Object Common Method Preface Mat object and IplImage object Common constructors for Mat objects Common Methods of Mat Objects Preface The environment used in this article is: Qt5.11 + OpenCV3.4.6 Environment Installation Reference Document: https://blog.csdn.net/z6348 ...

Catalog 3.1 Line Drawing 3.2 Draw Rectangles 3.3 Draw a circle 3.4 Draw an ellipse 3.5 Draw Polygons 3.6 Add text to the image python-opencv can realize powerful drawing function. Here, only basic drawing operation is introduced. Introduction of parameters: img: the image you want to dra ...

Simple threshold The same threshold is applied to each pixel. If the pixel value is less than the threshold value, set it to 0, otherwise set it to the maximum value. cv.threshold The function is used to set the threshold. The first parameter is the gray level image of the source image, the second parameter is the threshold used to classify th ...

Prepare 1: OpenCV Common Picture Conversion Skills Before computer vision model training, we often use image enhancement techniques to obtain more samples, but some methods in depth learning framework may not meet our needs for image transformation, so we still have a lot of common image processing techniques in OpenCV. Help. Image Channel Se ...