using opencv with c++ .net application compilation issues
I didn't face any issues while linking opencv library with basic console application but when I moved to do the same in a .net framework template I got many LNK errors ![image...
View ArticleOpencv java vs C++ in video capture
I'm creating a project that needs to capture live camera video feeds continuously all the time and does processing on each frame. Processing involves locating a particular object of interest when it...
View ArticleHow to implement detectMultiscale function for hog feature detection with...
I m using neural network implementation of opencv as classifier for training. There is provision of using detectMultiscale of hog with SVM. Instead of SVM I want to use neural network model. Any...
View ArticleUndefined reference to 'cvSmooth'
Hi. Write on QT and use version OpenCV 2.4.13. Today, with a problem. When you start the program, fails with the following error: D:\delo\po-russian\po-russian\sglazhivanie.cpp:31: error: undefined...
View ArticleSequence of calls in the cv::gemm(...) function
Recently I'have digged into the opencv sources, the reason was low performance of the opencv_dnn module. Searching around I have came to the...
View ArticleHow to count the matching lines in SURF ?
Hi , I am using SURF and trying to extract features and matches, so far so good, however, the only thing that I'have not been able to figure out is how to count the number of matching lines between...
View ArticleCalibrate camera - reprojection error
Hi I'm trying to calibrate a camera for undistort and pose estimation. What is acceptable value of reprojection error? The best value I got is around 3 for 30 source images. When I use more images,...
View Articlepictogram recognition in Android app
Hello, I would like to use an algorithm of OPEN CV to be able to recognize pictograms or words on a label - The label would have a dark or a clear background - It could be in paper or in tissue (which...
View ArticleHow to extract Angle , Scale , transition and shear for rotated and scaled...
**Problem description** I have rotated and scaled scene and need to correct the scale and rotation , then find rectangle known object in the last fixed image *Input* -Image scense from Camera or...
View ArticleHow can get vertically divided areas?
I am making an android application. This application provides binary analysis of captured photos. My question is this. **In case of image1, I wanna get 5 vertically divided areas as image2.** How can I...
View Articlecv.pyd vs cv2.pyd
All of the SourceForge packages have only cv2.pyd that I've noticed. However, I have a program that needs the cv library. Is there a repository somewhere with cv.pyd?
View Articlefourier descriptor in opencv
I tried to implement fourier descriptor to use it in machine learning algorithm but i got this error OpenCV Error: Assertion failed (type == CV_32FC1 || type == CV_32FC2 || type == CV_64FC1 || type ==...
View ArticlecvQueryFrame returns rotated image
I am using a MacBook Pro OS X version 10.12.1 with an external USB Web Camera. If I look at an image in photo booth with the external web camera the image is correct. However when I capture frames...
View ArticleHow to identify pixels with noise ?
Hi Everyone, I was wondering if there is any function for detecting (just detecting, not correcting) the number of pixels with noise within an image Take this picture for example...
View ArticleQuality control system for eraser factory
Hello all, My question is a mix between **"how to do the task in a quickly and professional way"** because I'm a completely amateur and **"how can I change my (probably) wrong pipeline"** (any advice...
View ArticleOpenCV dnn library to run Fast-RCNN
I tried to use the OpenCV deep neural network library to run the Fast-RCNN model at https://github.com/rbgirshick/fast-rcnn but it seems like OpenCV does not have the roi_pooling layer implemented. I...
View Articleversion 2413 debug and release lib behave differently
the imread function in the debug version is not working correctly for windows 7/10..
View Articleconvert mat type from a specific range pixel value?
Hi, I get the depth camera and I want to do some floodfill(). My source image is CV_16S.I have to convert the mat to CV_8U for floodfill(). However, what I interested is only a small range of pixel...
View ArticleConfidence value for svm model
I am using SVM algorithm to recognize Facial Expression using opencv library. I want to get prediction confidence of my test image but the syntax of predict is something like **float response =...
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