Manual Definition of points for image correction
Hi all! I have a question concerning the camera Calibration (eliminating effects due to camera abberations): I took the following picture  and ran...
View Articledestroying mousecallback in python
In C++ it is necessary to explicitly destroy a mousecallback by passing in a null pointer. But is this automatically done in python? since there is nothing like a null pointer in python, the only...
View Articleit is possible to obtain infrared values of a picture ?
Hi, i´m new in opencv ihave made some exercises with the library. i can obtain pictures of the red, blue an green band (one picture for each band), my question is : it is possible to obtain a picture...
View Articlehow to dispaly percentage pridiction in fisher face recoginition algorithm
i am using fisher-face to recognize faces and i want to show a percentage prediction on a rectangle with the matching name. secondly, i want to set a value e.g if the matching percentage is 80% it...
View ArticleBest approach for Grass Detection ?
I want to develop a program for detecting grass. It should be able to identify the input image as 'grass' or as 'obstacle'. It should output as 'grass' if there is only grass in the input image, and if...
View ArticleMatchTemplate documentation
Hi, I would like to use MatchTemplate, CV_TM_SQDIFF_NORMED, but I am not sure how to interpret the returned values (0 to 1). I think the equation described on...
View Articleimread and boost path
Hello ! It's not an 100% OpenCV question but I was wondering if you already had this problem, I use [the boost library](http://www.boost.org/) to handle path in my project but I'm stuck with this...
View Articleproblem in making fisherface recognizer efficient
i want to put a condition that if there is a known face then it executes the part where i display name of recognized person on the rectangle. but if there is an unknown face or a face with bad...
View ArticleNot able to extract text from attached image
 Hi All, I'm new to openCV. From colored image first I did smoothening of the image and then I converted the image to greyscale, but still, I'm not...
View ArticleSame output threshold image
I use three filter as below, each one if I run individual work well(three output image 'imgThresholded' is difference), but if I use continuously all, the output image 'imgThresholded' is the last...
View ArticlecvFindExtrinsicParameters2 use and translation vector meaning?
Hi, I have two questions. **First question.** I have marker. I get 2D coords of marker in pixels (image plane). I can get rotation and translation matrix that looks like: | r00 Â r01 Â r02 Â t0 | | r10...
View ArticleOpenCV Cmake error with TestEndianess.c
I am using cmake version 3.5.2 and g++ (GCC) 5.2.0 version to build opencv with tag 3.1.0. I use following command to configure the build: cmake -D CMAKE_BUILD_TYPE=RELEASE \ -D...
View Articleno Member getMat()
I'm trying to call the Method `getMat()` in a Mat Object. But my compiler throws the Error: `"No Member named 'getMat' in 'cv::Mat'"` **SOLVED `cv::Mat` doesn't have `getMat()` need to use...
View ArticleI am not able to download any library
I tried to download the 2.4.0/9/13.. and 3.0... none of them was able to be downloaded correctly (to extract it later) all the files stopped at 1,2 and sometimes on 6 MB so how can I download the full...
View ArticleLooking for Guidance
Hello there, I came across your open source facial recognition site and wanted to ask for some help. I am a looking for a piece of software that will analyse video footage I have of people and output...
View Articledetect all range colors on image
I need to parse the image on all available colors. I want to use function - " inRange " to get the coordinates arrays each of the colors. And then by the length of the array to determine which color...
View ArticleHaar Training hang after few stages.
I am doing haar training for object detection, first 10 stages goes very fast after 10th stages. it will hangs more than 9 days.i am using i7-12gb-ram.still slow. Pos samples 494 and negative samples...
View ArticleAnalyze images in group of 10
Hi, I am currently using this function for image averaging: cv::Mat avgImg; avgImg.create(width, height,CV_32FC3); for(i = 1; i <= N; i++){ image = imread(fileName.c_str(),0); cv::accumulate(image,...
View ArticleError when compiling core.hpp
Hi! Wildly sorry! Help a beginner. I install BCC55 - test cases were normal. I unzip the OpenCV-2.3.1-win-superpack.exe into the main directory of BCC55. I specify path where everything is...
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