imread illegal instruction
Hello, I'm creating simple application with opencv and I have a problem. When I try to load image from file (absolute path or local file) i have exception Unhandled exception at 0x0FE97EFE...
View Articlehow to configure TLD with win7 ,opencv 3.0 and visual studio 2013 express
Hello to all , I saw this thread http://answers.opencv.org/question/52872/how-to-perform-tld-tracking-on-roi-bounding-box-using-opencv-c-builtin-methods/ , by copying the code gives me error in...
View ArticleCmake configure doesn't stop
Hi, I am know configuring opencv 3.1.0 with Cmake 3.5.1, and I want to use it later in Visual Studio 2015. The problem is that the configure step never stops. As you see in the picture:  but...
View ArticleHow to parse Mat array saved in a csv file
The lines in the csv file looks like this: //there are more numbers than in the line below label, [4.9854589, 5.1516409, 4.6530952, 7.3120065, 5.8163691, 3.8221853, 5.8163691]
View Articlestereo camera for SLAM odometry
I need to buy a stereo camera that supports OpenCV to implement SLAM odometry. I need a camera con USB connection, good resolution, and supported by OpenCV and C++. I have a budget around 500$. I have...
View Articlemultidimensional kmeans
Hello to everyone, I'm trying to run the kmeans algorithm on a n-dimensional data. I Have N points and each point have { x, y, z, ... , n } features. my code is the following: cv::Mat points(N, n,...
View ArticleCompile PtrStepSz in cuda device code on linux
Hi, In a .cu device code, I pass cv::gpu::gpumat to kernel a through cv::gpu::PtrStepSz. To do that I need to include in the device code. In Windows I can compile such code in a cuda project including...
View ArticleAndroid QR code detection/extraction using OpenCV
I am trying to develop an android application to decode QR codes, however i do not want to use libraries such as zxing, i must implement it. The main problem i am having is how to perfectly extract a...
View ArticleDeriche edge detector
i wonder if there is any work around [Deriche edge detector](https://en.wikipedia.org/wiki/Deriche_edge_detector)? it would be a nice addition to OpenCV. ![image...
View ArticleHow to perform TLD tracking on ROI bounding box using openCV c++ builtin...
I Need to implement TLD in visual studio C++ windows 8 64bit . need help. Which opencv to Download? thanx in advance.
View Articlewhich method is better SVM,KNN or neural network for letters recognition
i have to recognize letters in a picture taken with android camera and i should use machine learning .I can't choose the best method .
View ArticleAssertion eror “ Vector subscript out of range ”Line 1140
Hello guys, I am beginner at opencv.The thing is I am trying to do that is cropping eye region from main frame and focusing on pupil.But I got error like this "Assertion eror " Vector subscript out of...
View ArticleInformative websites related to OpenCV
i think it will be useful if we add links of informative websites related to OpenCV here. Lets create a list together. Last additions : **SOFTWARE & PROJECT & SOURCE CODE** section added...
View ArticleMat type-checking in C++, Java and Scala
Would it be possible to have proper type-checking of Mat types in Scala and Java, and also using generics when possible? I have noticed that in C++ at least there seems to be some ways to define a Mat...
View ArticleTips for training cascade classifier
I am currently trying to train a cascade classifier with custom training images, which currently consist of around 70 positives and 600 negatives. When I run the training (using a version of OpenCV...
View ArticleCan any body tell me how to intialize MatOfRect object with MatOfRect...
I want to store Mat object values in Rect object. To do that I tried to create MatOfRect object with Mat Object values. But it throws an Exception saying Incompatible Mat and then app stops. Can...
View ArticleCanny dynamic threshold
[update] Thanks for one of the comments that remind me of the possibility that it doesn't find anything useful at all... I modified the threshold I used in creating edge map, and it started to work...
View Articlecv::Scalar color with transparent
 Hi, My question is it possible to draw rectangular/circle above image with transparent color let's say transparent green (see water molecules) using...
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