working hit-or-miss implementation
I need an implementation of hit-or-miss transform done in OpenCV. Searching the internet, all I found is [this program on...
View ArticleSet CAP_PROP_FOURCC does not work under Windows for USB camera
Trying to set camera mode from YUYV to MJPG without a success. Maybe I am doing something wrong? MJPG mode is working in other software packages. OpenCV => 3.1.0, Operating System / Platform =>...
View ArticleStereoSGBM crash
The code crashes at stereo->compute without any mention of error. Any ideas why ? Ptr stereo; int window = 5; stereo->create(1, 100, 16, 8 * 3 * window*window, 32 * 3 * window*window, 1, 10, 100,...
View ArticleHow to add Linear discriminant analysis (LDA) to Opencv4Android?
Hi, I want to use LDA classifier with Opencv4Android sdk 3.1.0 version but it seems that is not yet included. So I would like to know if is it possible to add it manually because it is already...
View ArticleOpenCV 3.1 cratesamples
I'm trying to create a .vec file with 1200 samples as the following: C:\opencv3\build\install\x64\vc12\bin>opencv_createsamplesd -vec vec.vec -bg tl_neg_2.txt -info tl_pos_vec_2\filenames.txt -num...
View ArticleHow do I save an image from a video stream?
Im brand new to digital image processing, and opencv, and Ive been struggling, to save an image, from a video stream. I am trying to use imwrite, to write a new image, from a frame. but it doesn't...
View ArticleC++ implementation of codebook algorithm in opencv
Hi all, I noticed in the sample folder of opencv there C implementation of codebook algorithm for background subtraction. There is none for C++ as it replaced with MOG, MOG2 and GMG algorithms. I want...
View ArticleWhere to set origin of model for solvePnP
Hi everyone, I've been figuratively tearing my hair out over this problem for over a month now. I have to admit that I haven't taken a good hard look at the math behind solvePnP (most people don't,...
View ArticleVideo Streaming from webcam and image processing with Python
I'm using the multiprocessing module in python to help speed up my main program. However I believe I might be doing something incorrectly, as I don't think the computations are happening quite in...
View Articlecrack detection
Hello there i used the thresolding techniques(thresold TOZERO) of my biscuit image and used canny edge detection. After then i used hough transform of it. it detect the biscuit crack. Now i want to...
View ArticleCascade Training Error OpenCV 2.4.13 error @ stage 4! Train dataset for temp...
I've built opencv 2.4.13 for ubuntu 16.04 x64 from source zip file downloaded from [opencv](http://opencv.org) website. I prepared the required libraries and packages according [OpenCV Installation in...
View ArticleTesseract user patterns
Hi, I am using Tesseract for OCr in my project. I would like to recognize words that follow specific patterns. Patterns that can take any digit or character but in a certain order. I would like to use...
View ArticleopenCV into iPhone application
Hi, I'm building an application where face recognition is going to use for password-less authentication. Could anyone please help me to integrated openCV into iPhone app.
View ArticleHow to fix libpng vulnerability for Play Store
Hi, I'm using OpenCV threw another library (scanlibrary) in an android app. For few weeks Play Store tell me that my APKs are not secure. I searched over the Internet for an answer that works with my...
View ArticleSVD for plane fitting - Not getting right results
I am trying to fit a plane via SVD and was hoping someone could point out the errors in my code. The plane I generate does not seem right at all. I am very sure the points I have filled in are correct....
View Articlewhich version of opencv should i use with visual studio 2015
hi, which version of opencv should i use with visual studio 2015
View ArticleHow to fit an ellipse to fingertips ?
 I want to fit ellipse to all the fingertips on this hand using the detected points. How should I draw ellipse only at those specific places. Should...
View Articlereading frames from mjpeg stream gstreamer, c++
Hello, I wrote a simple app which should read frames from mjpeg stream gstreamer. It works if I use gst-launch-1.0, but it does not work in opencv 3.1.0 in c++. Here are the details: This...
View ArticleRegion growing from superpixels
I have an image that has been segmented into superpixels. Now id like to merge / grow similar regions into bigger blobs and I was wondering if anyone can send a link to a paper that discusses the...
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