How does the cv2.VideoCapture class work with gstreamer pipelines?
Today I found out that you can use a gstreamer pipeline-string in the constructor of the VideoCapture class (see http://stackoverflow.com/a/23795492), like this: cv2.VideoCapture("autovideosrc !...
View ArticleCascade Classifier Training: Is the negNum decreasing each stage?
Hello guy, Does the second stage train with the exact same training samples as the first stage or just with 0.5x of the negative samples (maxFalseAlarmRate = 0.5). The 0.5 neg sampels which were...
View ArticleFace and Eye Detection using OpenCV in Anroid Studi
Hallo my name is Sohail from pakistan Sir i accessed the camera in Android Studio Now i need Face and Eye Detection using OpenCV I NEED Your Help need. Im new to OpenCV.
View ArticleHow to calculate Euclidean Distance d(h,g)
Dear community, I’d like to apply this equation of euclidean distance between two histogram for every Channel A, B and C  any help i'd be glad
View ArticleRandom pictures generator
I need to create a c++ library, which will generate random pictures, with specified parameters (frame size, noise etc.), using some existing fons library (which should also be created). The problem is...
View ArticleFace recognition using HuMoments
Hello, i'm asking if i can use HuMoment for face recongition , i know there''s an api for face recogntion but i want to know about huMoments. Thanks in advance. Lafi
View ArticleWhy sfm::reconstruct return empty points3d_estimated if I set only two images?
I try use sfm::reconstruct with video images. steps through which I passed - detect keypoint and descriptors for two images (SIFT) - chose only good key point - build the following structure data...
View ArticleBebopVideoView to Mat
Hello. I come up against the great problem. I`m try to BebopVideoView to Mat. (BebopVideoView is parrot drone source code) But I was failed for several days. Here is the code. package...
View ArticleAnalyse image from a video/avc (h264) Android
Hi I want to analyse the frames from a streaming which is using a h264 encoding format. this is the code I have to show each frame in a surfaceview inside the frame I have an array of byte which has...
View ArticleOpenCV 3.1.0 build failure on Windows 10
I'm trying to build OpenCV with OpenCV-contrib. My system is: Windows 10 Pro Insider Build 14965 Visual Studio 2013 Community Edition Update 4 CMake 3.7.0 I've downloaded the 3.1.0 release versions of...
View ArticleFace recognition Opencv confidence problem
i'm working on face recognition Project and i have followed the tutorial in the opencv website and i have use the same dataset , but when i test my program i have strange result (the confidence value)...
View Articlecmake failing with hash mismatch
I am trying to build opencv but cmake is failing with the following error , i have had this before and i could find the files and manually put them on the server but this time this file...
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 ArticleCan Haar or Cascade classifiers be accurate enough in detecting object size?
I'm trying to detect ping pong ball using my own trained Haar classifier(not so good one) and then to calculate ball distance from camera.I calibrated camera and used those parameters alongside with...
View ArticleHow to get the pixel coordinates of 4 corners points of (quasi) rectangle in...
I would like to find the pixel coordinates of the 4 corner points of the detected rectangle (its a airplane window that I assume is rectangle). Im able to detect the window (the rectangle) as shown in...
View Articleno-one install open cv and python on windows 8(64 bit) ,is there anyone then...
because having error like import cv2 Traceback (most recent call last): File "", line 1, in import cv2 ImportError: DLL load failed: The specified module could not be found. soo tell me which version...
View Articlehow can i link opencv 3.1 with VS 2015 windows 7 32bit?
there is only one lib folder wich is located in x64 how can i link it to windows 7 32 bit !! thanks
View ArticleCan we do background subtraction MOG without shadow of the person ?
With background subtraction MOG2 we get the shadow along but i want to use background subtraction MOG without shadow.The shadow of the person is being shown but i do not want to have the shadow at all....
View ArticleIs it possible to draw half circle?
Simple question. Is it possible to draw half circle in OpenCV? If not, how can I do this especially in Python?
View Article