StereoCalibrate hack
I have a problem with stereocalibrating images using opencv StereoCalibrate. Basically this is because of rather poor quality of photos I use (640x480 blurry images). However, I have got an idea, that...
View ArticleOpenCV4Android Camera Calibration sample error
I tried to run the Camera Calibration sample code from OpenCV4Android 3.0.0, Im using android studio. When I run the apps on my android devices the sample code can detect asymetric circle grid pattern...
View Articleopencv and pyramid
Hi, I want to implement pyramid class. I'm interesting particulary by [riesz pyramid](http://people.csail.mit.edu/nwadhwa/riesz-pyramid/RieszPyr.pdf) and [steerable...
View ArticleHot to read uint16 movie jpeg 2000 files (mj2) with open cv and c++
Hi, I have 1000x1000 uint16 mj2 video files, genrerated with matlab (v = VideoWriter('testData','Archival')), and want to read them in with opencv and c++. I tried to this with videocapture.read, but...
View Articlecv::calibrateCamera calling _rvecs.create(nimages, 1, CV_64FC3) is failed
I use the following code to test cv::calibrateCamera, but there is an fatal error, cv::calibrateCamera calling _rvecs.create(nimages, 1, CV_64FC3) is failed. Curiously, the same code can run correct...
View ArticleUsing numpy stl to draw a mesh in opencv
Hello ! Firstly I don't know if this is the best policy. I' have a mesh on a stl file. I can load it using the module numpy.stl. However, What I want is create an image with the mesh and overlaying on...
View ArticleOpenCv 3.1 HoughLine (exe stopped working)
Hello all, I'm trying to detect lines in an image using houghLines and Canny edge detector but everytime I get exe has stopped working, and this is really annoying. I'm using the latest pre-compiled...
View ArticleBest way to isolate the objects into individual files
What is the best way to approach this project? Should I be using template matching or other methods? The goal here is to be able to detect and match a "master" label in the image first and then save...
View Articleusing surf c++ algorithm with opencv 3.1
Hello, I am trying to use the surf algoritm with opencv 3.1 , but it still note working for me without any error this is the c++ algorithm of surf::...
View Articlegoodfeaturestotrack corner vector size
Hi, I'm having trouble with goodFeatureToTrack using OpenCV 3.0 in C++ with Qt and MSVC2010. When I run the following code, the size of `corners` is 4,289,272,441 (image is ok and displays). #include...
View ArticleProblems with rectified pictures for stereo vision
I m trying to do stereo matching but it doesnt work well until now. I determined the "tvecs" and "rvecs" for each camera. So i can use these relationships to get the translation vector and rotation...
View Articlelogitech c930
Hi, somebody can tell me if i can use the logitech c930 for continuos color recognition in real time video?
View Articlehow draw this rectangle
i have this line in facial detecction rectangle(frame, faces[i], CV_RGB(0, 255, 0), 2); how can draw a rectangle equals in this image 
View ArticleAccessing and modifying OpenCV Decision Tree Nodes when using Adaboost
Hi All, I am learning a boosted tree from 30000 randomly generated features. The learning is limited to only say the best 100 features. After learning how do I extract from the CvBoost object, the...
View ArticleMatrix expressions comparison result
I’m using the following matrix comparison to see if two 3 channel 8 bit color images are identical: Mat result = image1 != image2; Your documentation states: *The result of comparison is an 8-bit...
View ArticleAruco - draw position+orientation relative to marker
Hi, I want to draw the orientation of my camera relative to a detected marker, I use the aruco module. So far I have a working code (basically the aruco example detect_markers.cpp from...
View ArticleEntering >5 points into "findEssentialMat"?
Hi, I'm trying to figure out the relative pose (R, t matrices) of two cameras using two synchronized videos of the same scene viewed from different positions. As input I've selected points of the...
View ArticleHow can I detect "blur" in images?
Im new here in OPENCV and also a beginner in image processing.. I want to develop a system that could detect if an image is blurry cause by FOG, RAIN or SMUDGES on transparent surfaces or reflective...
View ArticleDisplaying processed image on screen
Hello all!! I'm working on an Android project with OpenCV library on Eclipse Platform. In this project I'm stuck at a point where I need to display the Mat image on the screen after it has been...
View ArticleColor classification
I am goint to find out hsv values of four main colors in a image like this, so that I could get those values.(minH1, minS1, ..., maxS4, maxV4). What would be the best way to make a color clustering?...
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