emgucv

问题 I'm using EmguCV and i've got a byte type Grayscale Matrix with the size of 640x480 and Every element of the matrix is either 255 or 0. Now I need to make an Image from this. The best constructor I found looked like this: Image<Gray,byte>(int width, int height, int stride, IntPtr scan0) I got the first, second and fourth parameters from the matrix and I sent 640 for the stride. But it gives me an Access violation exception: Attempted to read or write protected memory. This is often an

问题 I'm using EmguCV and i've got a byte type Grayscale Matrix with the size of 640x480 and Every element of the matrix is either 255 or 0. Now I need to make an Image from this. The best constructor I found looked like this: Image<Gray,byte>(int width, int height, int stride, IntPtr scan0) I got the first, second and fourth parameters from the matrix and I sent 640 for the stride. But it gives me an Access violation exception: Attempted to read or write protected memory. This is often an

问题 I have this code in my project: MCvFont font = new MCvFont(FONT.CV_FONT_HERSHEY_SCRIPT_SIMPLEX, 0.2d, 0.2d); When program runs, It gives an exception: The type initializer for 'Emgu.CV.CvInvoke' threw an exception. So please help me with on this issue. 回答1: Usually these kind of "Emgu.CV.CvInvoke" exception will throw if there are some problems with your Emgucv Dll's. Check these following thing's: Open Your Project & Verify whether all the Project-> Reference's are made correctly.e.g Emgu.CV

问题 I'm trying to get frames from a video file but while reading frames, OpenCv:u!=0 exception is being thrown. I'm using Emgu.Cv dll. I have written the code as follows: private void GetVideoFrames(String Filename) { try { captureFrame = new Capture(Filename); bool Reading = true; while (Reading) { using (frame = captureFrame.QueryFrame().ToImage<Bgr, Byte>()) { if if (frame != null) { imageBox1.Image = frame; frameCount++; } else { Reading = false; } } } } Could anyone please provide some help.

问题 I am trying to detect a pattern shown in two images. Hence I have been trying to use the SURF algorithim found in emgu.CV, but the "SURFFeature" example that is given gives me the following error: An unhandled exception of type 'Emgu.CV.Util.CvException' occurred in Emgu.CV.dll Additional information: OpenCV: norm == NORM_L1 || norm == NORM_L2 || norm == NORM_HAMMING Any ideas how to fix this? When I try the "Hello World" example and the face detection example, both seem to work fine. Thanks

问题 I have tried hard But i am not able that how to find single point of interest in SURF Algorithm in Emgu CV. I wrote code for SURF. and I have problems that some times it goes in if statement near my numberd section "1" and some times it does not based on different images. why is that so? on the basis of that homography is calculated to not null. than I become able to draw circle or lines. which also have problem. circle or rectangle is drawn at 0,0 point on the image. Please help me. I will

问题 The following code doesn't compile in EmguCV 3.4.1. Image<Gray, float> image = new Image<Gray, float>(path); IntPtr complexImage = CvInvoke.cvCreateImage(image.Size, Emgu.CV.CvEnum.IplDepth.IplDepth32F, 2); CvInvoke.cvSetZero(complexImage); // Initialize all elements to Zero CvInvoke.cvSetImageCOI(complexImage, 1); CvInvoke.cvCopy(image, complexImage, IntPtr.Zero); CvInvoke.cvSetImageCOI(complexImage, 0); Matrix<float> dft = new Matrix<float>(image.Rows, image.Cols, 2); CvInvoke.cvDFT

问题 I would like to add a smaller image on top of a larger image (eventually for PiP on a video feed). I can do it by iterating through the relevant data property in the large image and add the pixels from the small image. But is there a simpler and neater way? I'm using EMGU. My idea was to define an ROI in the large image of the same size as the small image. Set the Large image equal to the small image and then simply remove the ROI. Ie in pseudo code: Large.ROI = rectangle defined by small

问题 I have problems with the following code namespace MyApp { public partial class PhotoWindow : Window { private Capture _capture; public PhotoWindow () { InitializeComponent(); _capture = new Capture(); if (_capture != null) { //<Image> in XAML CaptureSource.Width = 150; CaptureSource.Height = 180; _capture.ImageGrabbed += ProcessFrame; _capture.Start(); } Activated += (s, e) => _capture.Start(); Closing += (s, e) => { if (_capture == null) return; _capture.Stop(); _capture.Dispose(); }; }