slow optical flow
Hi, Is there any suggestion to enhance the performance for this optical flow implementation #define MAX_COUNT 250 #define DELAY_T 20 #definePI 3.1415 void main (){ IplImage* image = 0; IplImage*...
View ArticleBuild Opencv 3.1 + Contrib (face module) for Java
Hi guys, I'm looking to use in my Java application the face recognition features provided in the contrib modules but I'm facing a blocking issue : I can't manage to build the opencv_java310.dll. I have...
View ArticleReference for SimpleBlobDetector
I would like to know if there is any reference paper for the blob detection algorithm implemented in `SimpleBlobDetector`. All papers regarding blob detection that I could find describe other...
View ArticleDetect blur, sharpness of the single image
I am trying to create validation of the image into my mobile application for different platforms(iOS, Android, etc.) Googled a lot I found some solutions and snippets but unfortunately they are not...
View ArticleRunning into memory issues when using cv::cuda::sum
I want calculate run `cv::sum` on the GPU - so I looked to `cv::cuda::sum`. However, I'm running into issues. This github gist has all the details. I've launched...
View ArticleFace Detection using GPU
I want to know whether openCV version 3.0 provides parallel GPU implementation of face detection i.e with CUDA ? If it provides that then how the training of haar cascade is done for it ? Please direct...
View ArticleProgram doesn't compile as libglog.so not found, Glog compilation gives...
Program doesn't compile as lobglog.so not found, Glog compilation gives libglog.a What to do? usr/bin/ld: warning: libglog.so.0, needed by /usr/local/lib/libopencv_sfm.so, not found (try using -rpath...
View ArticleCan VideoWriter open a named pipe?
I can open a file named vid.avi using VideoWriter() but when I mkfifo vid.avi and then try to use "vid.avi" as the filename, it hangs. What gives?
View ArticleCalc eucliadian distance between two single point ?
I have Point2f a(10,10); Point2f b(100,100); I would like to calc the distance (Euclidean) between these two points. Instead to write the manual function: float euclideanDist(Point& p, Point&...
View ArticleWhere are built in functions for android?
Every builtin function I search, are either given in c++ or c or python. How to use them in android? Like I want to convert RGB to LAB color space, and I found...
View ArticleDetecting isolated region in a heatmap?
I am a beginner to image analysis and am trying to write a program that does the following- What I have is the image of a heat map. Something that looks like ![image...
View Articlehow to detect and measure foot height and width in image ?
I have to detect the foot in image and have to measure the width an height of foot in image. Currently I am using crop to measure height and width of foot image using rectangle. I want same rectangle...
View ArticleCamera preview is sideways
Hi, I have integrated opencv4android face detection sample. I want to show `Camera` in `Portrait` mode, the thing is the default `JavaCameraView` is rotated 90 degree to the left. I apply some rotation...
View ArticleSorting HSV Values
Hi guys, i was wondering what is the best way to sort hsv values. I know that the first value to considerate is the H, but after it, should i use the S or the V value to order, e.g. a list of hsv values?
View ArticleDLL load failed with opencv 3.1 and python 3.5
Hello, I installed library OpenCV 3.1 successfully - i used whl file, but i can't import cv2 anyway in my script. I saw this topic: [link...
View Article_CrtlsValidHeapPointer(block) error when using opencv in c++ winforms...
Dear All, I am trying to use opencv with windows forms application to display an image. I created two extra classes. one as the model and other as the controller class. I imported opencv libraries in...
View ArticleUnwarp images of planar object
I have two images viewing the same planar object. I can compute a homography (findHomography) or the fundamental matrix (findFundamentalMatrix). I can warp one image to the other or vice versa (using...
View ArticleIn which header file seamlessClone() is present?
In which header file can I find seamlessClone()? Is it part of opencv_contrib extra modules?
View Articleorb function
Dear all openCV seniors, I am working on ORB project. I am trying to solve the function multiple definition issue for ORB source file....
View ArticleTrain set question
Hi i want to train a classifier to detect some road signs. Should i include in negative set also the other road sign or only just background?
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