error using Lab color space
When i change the object from one position to another, considering that their are two pixels at distance d1 and color (1,a1,b1) and (1,a2,b2), why cant i find this two pixels at given previous...
View Articleubuntu 16.10, OpenCV build fails - stdlib.h missing
Hello, I'm trying to build OpenCV on Ubuntu 16.10. The build process is interrupted with the error shown below. Obviously the file "/usr/include/c++/6/stdlib.h" exists in my system. I have tried this...
View ArticleWritting a videocapture driver
Hi, I need to write my own class videocapture (Windows 10 VC 2015 and opencv 3.1-dev). I write somethin like this : class MyClass : public VideoCapture { .... Now I want to write retrieve method I...
View ArticleHow to adjust parameters in BackgroundSubtractorMOG
Hello everyone, I'm trying to use the BackgroundSubtractorMOG function, but the output seems to be the same no matter how I change the parameters. The output is the same when I set backgroundRatio =...
View ArticleLinking staticlib in mvs2013 release gives external errors
I have multiple errors LNK2001: unresolved external symbol error "opencv_highgui2413.lib(cap_vfw.obj) when i try to use the staticlib folder instead of lib and dlls in mvs2013 windows 10 and release...
View Articleare there memory leaks in Java detectMultiScale()?
I'm trying to write a android app with face detection and I found memory leaks exist after calling detectMultiScale() can anyone tell me how to fix this problem? I have searched solution related to the...
View Articlebuild without highgui or gstreamer
Is it possible to build OpenCV without highgui, and hopefully not need gstreamer? I'm using RHEL 5. The gstreamer-plugins-bad-devel rpm from rpmforge (dag) is the only rpm that has gstappsink.h and...
View ArticleHow do I live stream wifi camera using python opencv ?
I have a project for my university to use python but the thing is I'm an absolute beginner at this. I've found several post through google but I can't seem to get it streaming. I managed to stream...
View ArticleHow to read images from a camera buffer
My camera can not direct use cv::imread for read image. Only have a buffer of uint32. So how to convert the image to Mat. Thanks
View ArticleCaffe section in the opencv's makefile
What does Caffe section do in the opencv build. I've tried to google it but without any outcome. 
View ArticleHow to remove bad lighting conditions or shadow effects in images using...
I am trying to find as solution for making the image better by removing the bad lighting effects present in photos.
View ArticleDocumentation for opencv_annotation
Can anyone explain how the opencv_annotation tool works. I can't find any documentation. I have it loading the images, but I can't apply my selection or select multiple regions
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 =...
View Articlecalculate the bottles in fridge
Hello I have a project in which I have to calculate how many bottles left in the fridge. Please refer the image [C:\fakepath\image3.jpg](/upfiles/14809214407909835.jpg) . This is the image in which we...
View Articleinit done opengl support available
I built opencv 2.4.10 from source in ubuntu 16.04. I am getting this message `init done opengl support available` I am trying to run the `grabcut.py` example provided by opencv , but whenever I right...
View ArticleIs it possible to run the CascadeClassifer without preprocessing?
Hello OpenCV Community, is it possible to run the CascadeClassifier without the Preprocessing (Sliding Window and Image Pyramid). I mean i want to give really small image fragments as input (e.g....
View ArticleLoading large images - OpenCV Error: Insufficient memory
Hello all, I am trying to read a large image in OpenCV & Qt 5.7 (32bit). This is the code I'm running: #include using namespace cv; int main(int argc, char *argv[]){ Mat mat =...
View Article!! traincascade: So many people run in this issue: Train dataset for temp...
I spent so many hours on this problem. Searching the openCV forum for solutions and also searching in stackoverflow and google. I tried all advices to fix this issue: "Train dataset for temp stage can...
View ArticleWhat is the best format to use with SIFT?
Is there any difference in terms of precision and speed in using SIFT with JPEG, PNG or PGM images? Obviously supposing the same image size.
View ArticleNetcat stream on /dev/stdin not working with OpenCV 3.1.0-dev on Ubuntu 16.04
Hello to everyone. I m encountered a "strange" problem trying to stream a video using netcat from my Raspberry Pi (using the Pi Camera). The problem is the following: If I use Opencv 2.4.13, everything...
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