Just starting out: matching terminology with desired goal
Hi folks, I'm just starting out with OpenCV (and image recognition/computer vision in general). My goal right now is simply to hold up an image to my webcam and determine which image I'm holding up...
View ArticleBFMatcher and crossCheck
Hi, When I use BFMatcher I can find in [constructor option crossCheck](http://docs.opencv.org/master/d3/da1/classcv_1_1BFMatcher.html#abe0bb11749b30d97f60d6ade665617bd) Now if I want to use new method...
View ArticleAttempted compilation results of unsuccessful sample code
I am unsure where the symbol "_ZN2cv9rectangleERKNS_17_InputOutputArrayENS_6Point_IiEES4_RKNS_7Scalar_IdEEiii" comes from. This is OpenCV 3.0 from github. Is there unfinished code to make this work...
View ArticleHow to use driver software for PS3 EYE (USB)-camera?
Hi all, I have found some driver software for the Sony PS3 EYE camera (https://github.com/inspirit/PS3EYEDriver/), usable on OS X 10.10.5. Examples to use that driver with Cinder or OpenFrameworks can...
View ArticleOpenCL Haar : Invalid classifier cascade
Hello I have a Problem with my implementation of haar face detection with the use of OpenCL. I tried the exact same Code with the use of a CPU based Approach and it worked but a bit slow in realtime,...
View ArticleHow to Extract track information with OpenCV?
  Hi,I just need your help. We're preparing for Robocon 2016. according to the rules,our...
View ArticleImplementation of various matlab functions in opencv
I am trying to implement various Matlab functions in opencv using c++. These are the functions lab2uint8 , lab2uint16 , lab2double , xyz2double , xyz2uint16. These conversions I did by 'convertTo'...
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View ArticleWindows linking dll error
Hello, I have worked extensively with openCV on my mac but I am having trouble installing it in windows. I am using visual studio 2013 as my IDE and trying to setup it up with openCV. I read this...
View ArticleUnable to get Mahalanobis distance
I am trying to find the Mahalanobis distances between a test sample image and a few training data images (At&t database). I took...
View Articleopencv build with qt
Dears, I'm trying to build OpenCV WITH_QT, at WIndows 7 64bit using MinGW. Linking ends with error: Scanning dependencies of target opencv_highgui [ 40%] Building CXX object...
View ArticleOpenCV, CMake w Eclipse Mars
Dears, I'd like to understand configuration for OpenCV build (I have latest source from github). Within CMAKE configuration I specified "Eclipse CDT4 - MinGW Makefiles ". By CMAKE generating then I...
View ArticleWhat is the history parameter in BackgroundSubtractorMOG2?
I'm on OpenCV for java. I have read and understood the Zivkovic paper about the algorithm. I can't seem to understand what the `history` param in the `BackgroundSubtractorMOG2` constructor is about....
View ArticleDetecting small differences in objects
Hello, I am fairly new to OpenCV library and was wondering what would be the best method find small differences in two images? What I am working on is a software that detect small differences between...
View ArticleTrain Cascade parameters calculations issue
I am training a cascade classifier using opencv. I have **56** positive and **120** negative samples. Their dimensions are 40 * 50 pixels. The code that I used to make the samples was:...
View Articleline extration in opencv_contrib
I need detect lines in a image. And I find the line_extraction methods in opencv_contrib. But related cpp files in opencv_contrib cannot be compiled correctly. What should I do? Apart from Hough...
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View ArticlePixel intencity difference in opencv and Matlab
I am trying to implement various Matlab functions rgb2lab in opencv. I got output images(in opencv) similar to Matlab. But their pixel values are different. For example output pixels values of 2x2...
View ArticleFilters based on min max mean median standard deviation
Hello, I have hundreds of images and I want to fitler them to retain edges with minimum noise. I want to do this automatically. Like. //Analyze image meanStdDev(roiImage, meanImg, SDImg);...
View ArticleLine detection method
Hi Guys, I'm trying to do some project to detect um object in microscope. I'm using OpenCV for some time, but I dont underestand everything... Goal is: 1. with movable cursor find centre line of two...
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