Hough transform in OpenCV4Android
Hi guys, I'm stuck again on my app, i.e. detecting boxes on shelf. now I am starting to use simpler photos, with foreground (boxes) is different from background: colored boxes on white or black...
View Articleerror while trying to run a tracker code
I've recently downloaded opencv3.1.0 on windows 7 desktop with microsoft visual studio 2015. But when I try to run the code it gives me these errors for the following line of code // create a tracker...
View ArticleHow to generate python bindings for OpenCV based projects
Hello there, There are many C++ projects out there that use OpenCV. On the other hand, it is very tempting to use the python interface of OpenCV, especially for experimentations. Unfortunately, it is...
View Articlein android, to show an image using opencv, where should i create the Mat object?
I dont know in what place i need to do it, I know that not in onCreate, but i dont know where yes.
View Articlelinux arm cross-compiling, problem with linking OpenCV so libraries
Hello. I am building a c++ project for arm with OpenCV dependencies and getting some errors: Linking CXX executable VehicleDetection...
View ArticleAwful artifacts when capturing from web cam
I am running OpenCV 3.1.0 on my Raspberry Pi 3 (with Raspbian Jessie). I'm using the Python 2.7 bindings. As I request frames from a VideoCapture, occasionally (apparently at random) the frame will...
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 : [Philipp Krähenbühl](http://www.philkr.net/home) [Torr Vision...
View Articlecorgi butt vs. bread
Hi, i'm thinking of doing a cs project on having a computer detect whether it's a corgi butt or a loaf of bread from this image. Could anyone...
View Articleopenh264 - bEnableFrameSkip=0, bitrate can't be controlled
there are a lot of questions asked regarding opencv + H.264 but none of them gave detailed explanation. i am using openh264(openh264-1.4.0-win32msvc.dll) along with opencv 3.1(custom build with cmake...
View ArticleYUV (bytes) to HSV ?
I have a YUV420p stream from picamera. I am able to convert it to RGB with this: def convertYUV(stream,resolution): fwidth,fheight = resolution A = np.frombuffer(stream, dtype=np.uint8) Y =...
View ArticleWhich is a good algorithm to recognize flora, fauna.
I am looking for what kind of pattern should i go for Ocean fauna such as given in this image. I tried with crop image of one of them and trained it till stage 20 opencv cascade classifier but no...
View ArticleProblem to find contours
I have problem to find contours. There are errors when show the countours. I must change some parameters? The code: imageInput = imread(PATH+images[i], CV_LOAD_IMAGE_COLOR); fileOutput...
View ArticleCannot retrieve matrix from an xml file using FileStorage
I am storing features in form of a matrix in an xml file using FileStorage FileStorage f("trial.xml",FileStorage::WRITE); Mat feature; f<<"feature"<18f 3.35365832e-001 1.21951215e-002...
View ArticleOpenCV 3.1 - unresolved external symbol cvUpdateMotionHistory
I'm using OpenCV 3.1 and have compiled together opencv_contrib downloaded from GitHub on 2016-3-24. I have these codes that detect moving vehicles in video and am trying to build it with VS2012 on...
View Article0xC0000005 dll exception: imwrite functions cvtcolor does not
Good afternoon everybody! I have what I believe to be a DLL runtime loading, nevertheless I'm at my knowledge's end. If you care to have a look at my failing code: Mat src; Mat resized; Mat gray; src...
View ArticleSelect timeout error on BeagleBone Black
Hi, I am testing an opencv video capture code on my BBB (running Debian Wheezy: Linux beaglebone 3.8.13-bone79 #1 SMP Tue Oct 13 20:44:55 UTC 2015 armv7l GNU/Linux) but getting a select timeout error...
View Articlesvm load (still?) missing in java
So after training and saving my model. I tried to load it again only to find that there's no load function in the java wrappers. After some googling I found that this is a...
View ArticleSurfFeatureDetector core dumped
I am trying to reproduce the code displayed [here](http://docs.opencv.org/2.4/doc/tutorials/features2d/feature_homography/feature_homography.html) (it was an absolute pain to debug). The actual code...
View ArticleI'm new to openCV, trying to use it differentiate objects based on its...
I'm using Raspberry Pi and OpenCV-3.0.0. trying to make a project which can able to sort objects based on its color, for eg; it select red objects and rejects green or yellow objects. I'm done with...
View ArticleExtracting the silhouette of a person in a video and change background
I want to track a man silhouette in a video, and get automatically this silhouette in next frames. He is moving (the size and shape of the silhouette is changing and it is possible that the man to...
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