To use default camera, you need to not pass -i argument. This command line works for me: path\\to\\cascade\\facefinder -m 128 -M 1024 -a 0.0 -q 5.0 -c 1.1 -t 0.1 All but first arguments are optional. solved How to give argument for webcam
You can use a port of BGI library for Windows (WinBGIm). Here’s a link to a general idea of how to do it (sample project in VS2010). Project: http://muhammadallee.pbworks.com/w/file/53399106/WinBGIm-Demo.zip (You would need to go to Project Properties->Linker->Input and correct the path of the lib file there. Alternatively, use this project: http://www.cs.colorado.edu/~main/bgi/visual/BGI2010.zip Documentation:http://www.cs.colorado.edu/~main/bgi/doc/ It will use … Read more
Because Point2f is in the #include opencv2\core\core.hpp And Point2f rgbMat_center(rgbMat.cols/2.0F, rgbMat.rows/2.0F); this is wrong. rgbMat is pointer so it has to be like rgbMat->cols. 4 solved stuck in implementing filters in different direction in opencv [closed]
blob=cv2.dnn.blobFromImage(cv2.resize(image,(300,300),1.0,(300,300),(104.0, 177.0, 123.0)) here is one closing bracket missing 0 solved I am writing a simple face recognition program I faced Syntax Error [closed]
Extract the OpenCV install in any directory you want. Copy the path of the directory where you extracted the OpenCV and add it to your System PATH. Restart your computer to allow it to recognize new environment variables. Open the properties of the project in Visual Studio and select VC++ Directories Select Include Directories and … Read more
I hope this might help you as I am doing something similar. Mat gray8 = new Mat(marked.size(), CvType.CV_8UC1); Imgproc.cvtColor(marked, gray8, Imgproc.COLOR_RGB2GRAY); Scalar mean = Core.mean(gray8); Imgproc.threshold(gray8, gray8, mean.val[0], 255, Imgproc.THRESH_BINARY); /*Imgproc.erode(gray8, gray8, new Mat(), new Point(-1, -1), 2);*/ List<MatOfPoint> contours = new ArrayList<MatOfPoint>(); MatOfInt4 hierarchy = new MatOfInt4(); Imgproc.findContours(gray8, contours, hierarchy, Imgproc.RETR_LIST, Imgproc.CHAIN_APPROX_SIMPLE); Toast.makeText(getApplicationContext(), contours.size()+” … Read more
The code is almost perfect. It just can’t crop on the right side because of the scrollbar. And it does not consider some padding (which you liked according the comments). The thing I removed is the topology modification. import numpy as np import cv2 img = cv2.imread(‘cropwhitefromimage.png’) scrollbarright = 20 img = img[:, :-scrollbarright] gray … Read more
You can find white dot by numpy.where. You can try this way: import numpy as np import cv2 img = cv2.imread(‘XXWck.png’) x, y, z = np.where(img==(255,255,255)) points = zip(x,y) print(points) 1 solved Get X and Y coordinates of white dot in a black screen python [closed]
Can I install glibc from some repo? Not likely: distributions usually don’t ever update the major/minor version of glibc from the one they originally shipped with, because the likelihood of breaking applications is too great. You may have to build glibc-2.15, or better current glibc-2.24 from source and install it into non-default location. See this … Read more
self.tracks seems to be an (n,2) list. The outer loop takes each of these values, turns them two by two into integers x and y, then performs a function/method cv2.circle with an object mask and several other parameters. container[-1] indicates that you want the value of the last index of container. The values of the … Read more
You describe with “click picture, start recording, stop recording” default imaging behavior of cameras. Those buttons work on most cams using opencv (/pyqt) but beyond is SDK manufacturer specific. If you can’t figure it out with your camera post product name, type, version into your question. For example… FLIR has a vast amount of SDK … Read more
this is to improve concept Mat A = (Mat_<float>(3, 4) << 1, 2, 3, 4, 5, 6, 7, 8, 9, 0.1, 0.1, 0.3); Mat B = (Mat_<float>(3, 4) << 1, 2, 3, 4, 5, 6, 7, 8, 9, 0.1, 0.1, 0.3); Mat AB0; multiply(A, B, AB0); cout << A << endl; cout << B << … Read more
You are assigning a function to a function. Functions do not have a static value as you are trying to assign, and therefore you cannot simply assign another function to it. Maybe you want to assign each to a variable like this: my_var1 = predict_func(x, y, w, h) my_var2 = cv2.boundingRect(cnts[i]) Or maybe you want … Read more
You’d better use other frameworks other than OpenCV. OpenCV is extremely heavy for this kind of job. It’s mainly focused on image processing. Maybe you can use OpenImageIO, freeimage or other libs. You can refer to these posts: Reading an image file in C/C++ https://products.fileformat.com/image/cpp/openimageio solved How to build opencv that only support decode jpeg?
one of the problems in your code is, that you never check the results of your operations, there should be: M[i] = imread(“Klasa_pierwsza\\” + lista[i]); if ( M[i].empty() ) { cerr << “Klasa_pierwsza\\” + lista[i] << ” could not be loaded !” << endl; continue; } // … std::vector<cv::Vec4i> lines; cv::HoughLinesP(bw, lines, 1, CV_PI / … Read more