How to count the edges in a cropped image
  I have a car park model image and wish to test the capture of an irregular cropped portion to detail how many...
View ArticleWhere should I include ueye libraries?
Hi guys, I am going to use ueye camera for image processing and am totally new in this field. I have already installed Visual community and opencv following this tutorial:...
View ArticleOrientation of two contours
I try to calculate the orientation of 2 contours. At the end i want to rotate one contour, so it is in cover with the other one. With my code I get a result, but it isn't that accurate. Also I get the...
View ArticleSVM predicting '1' for every test image.
I am using SVM for facial expression recognition through opencv. I have trained my svm model with 50 images for each expression(happy, sad, angry) assigning labels 0,1,2 for each expression...
View ArticleVideo composition by selecting videos randomly
I have multiple videos that I want to compose to get a single video. Currently I am using the following code to compose a video . video_index=0 cap=cv2.VideoCapture(video[srt_time[video_index]]) width...
View ArticleIs it possible to port CascadeClassifier from v 2.4.11 to 3.1.0
In what way can I port cv CascadeClassifier from v 2.4.11 to cuda CascadeClassifier v 3.1.0 ?
View Articleconnecting two closest line after perform Houghline operation
After using probabilistic houghline operation in an image, i have the information of line's two co-ordinate points. Anyhow, my line is broken, show as a two line, so now i have to connect those line...
View Articlewhich version is suitable for Visual Studio 2008/2012 64bit.
Hi, I have both VS 2008 and 2012 version. I need to use 64 bit compile. so which is the best Opencv for 64 bit compilation. Advance Thanks for your support.
View ArticleWhich are the most important segmentation algorithms?
Hello everybody, For my studies, I need to learn about the most important segmentation algorithms in OpenCV. Today I don’t know much about OpenCV at all (total noob). So, first I need to find out which...
View Articleinstallation when wrong on ubuntu 16.10
Hello guys I'm trying to install opencv- 2.4-13 on ubuntu 16.10(x64) /opencv-2.4.13/release$ make -j2 [ 0%] Built target opencv_core_pch_dephelp [ 2%] Built target opencv_perf_core_pch_dephelp [ 5%]...
View ArticleOpenCV version 3 basic info ? Python only ?
It looks as OpenCV version 3 has some major differences in files etc. Running CMake using supplied file creates /usr/local/lib/pkgconfig which appears to be Python wrapper for "pkg-config" thus...
View ArticleWhich are the most important segmentation algorithms?
**Hello everybody,** For my studies, I need to learn about the most important segmentation algorithms in OpenCV. Today I don’t know much about OpenCV at all (total noob). So, first I need to find out...
View Articleundefined reference to `cv::imread
Hi, I'm using CLion as IDE and trying to link OpenCV. But I'm having problem even with a very simple app. I prepared OpenCV binaries with these steps. 1. Extract OpenCV files (from official website)...
View ArticleHough Transform after removal of color
I have a hough transform object detection code which detects the target objects. But a few lines are detected from the green background (trees). I wish to eliminate all the green background. I tried a...
View Articlecreating mp4 file in linux
I can read and play the file but when I write a mp4 or even avi video its not playable . I have confirmed that ffmpeg can create the video fine so why from openCV its not working? iam using openCV...
View ArticleQuestions on camera matrices
I am getting very confused on camera matrices. 1) Does the extrinsic matrix describe the transformation from object to camera or camera to object ? 2) Does the extrinsic matrix apply the rotation...
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 ArticleHow to recognize the blue or red soft saucers?
How to recognize the blue or red soft saucers ? Additional,how to recognize their motion trail when they are flying? Please tell me a way to use opencv library to get the solution about this .![image...
View Articleinstall opencv on mac
I am trying to install opencv on my mac cd ~/opencv mkdir release cd release cmake -D CMAKE_BUILD_TYPE=RELEASE -D CMAKE_INSTALL_PREFIX=/usr/local .. make I get the following error, ld: framework not...
View ArticleboundingRect assertion error
cv::Rect rect = cv::boundingRect(opencv_crd_mat); OpenCV Error: Assertion failed (npoints >= 0 && (depth == CV_32F || depth == CV_32S)) in cv::pointSetBoundingRect, file...
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