imdecode() without temporary file
Hi all, It seems from looking at the OpenCV source that the function cv::imdecode() creates a temporary file under some circumstances and decodes that file to create the decoded Mat object. Does anyone...
View ArticleOpenCV 2.4.13 Does not build with CUDA 4.2
The most recent OpenCV build on github says that the minimum CUDA version is 4.2 (`opencv/cmake/OpenCVMinDepVersions.cmake`), but `modules/cudaarithm/src/cuda/lut.cu` utilizes the cudaTextureObject...
View ArticleTracking with CamShift
Hi, I have a problem with CamShift Tracking, At each iteration the region grows, reaching quickly the image size, and thus losing the person who is tracking. Where is the problem? This is my code int...
View ArticleSimple image stitching (C++)
I'm having a hard time finding a tutorial that explains how to do image stitching. I've read https://ramsrigoutham.com/2012/11/22/panorama-image-stitching-in-opencv/, but it's only a code example, and...
View Articlerobust countour fitting
 The above image shows a light table, with 3 liquidfilled vessels on top. The camera is approx. 30cm apart from the table, and one can see the parallactic...
View ArticleWrite and read Matt descriptor in SQLite
How can I record a Mat with descriptor information from a SURF in a column in SQLite? surf->detectAndCompute(matImage, Mat(), keyPoints, matDescriptor, false); And how to read this data and...
View ArticleOpenNi2 and LibFreeNect2 Example
Is there any example code of using libfreenect2 and openni2 together. I am trying to build a hand skeleton or even just a skeleton, and nite seems to be the way to do this from what I can tell, but I...
View ArticleprojectPoints functionality question
I'm doing something similar to the tutorial here: http://docs.opencv.org/3.1.0/d7/d53/tutorial_py_pose.html#gsc.tab=0 regarding pose estimation. Essentially, I'm creating an axis in the model...
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View Articlehttp://drozforskolin.org/beard-czar-reviews/
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View Articlelibopencv_core.so.3.0.0: undefined reference to ippiCopy_32s_C4MR
Hi all, I am trying to compile opencv 3 and currently stuck at a compiler error.> Linking CXX executable> ../../../bin/opencv_test_cudev cd>...
View Articlereading csv file
I have a csv file which contains the respective x,y coordinates for images. how can i access x,y coordinates according to the image file. Do i have to store csv data in an array or is there any other...
View ArticleFind rectangle from image in android?
hello, i want to find four black cornered rectangle from below image  how to find those four border rectangle from this image? i have tried with this...
View ArticleAdditional Dependancies for OpenCV 2.4.13
I need the list of libraries/additional dependancies for OpenCV 2.4.13. Does anyone have it or know where to find it? I'm using Windows 7 and Visual Studio 2015.
View ArticlePreprocess images before feature detection?
Hi! My goal is to find known logos in static image and videos. I want to achieve that by using feature detecton with KAZE or AKAZE and RanSac. I am aiming for a similar result to:...
View ArticleFollowing the object
Hi! I have to make a project using openCV to follow the object using camera. For example: I go inside the room and camera have to detect me and than follow me when I move. If i go right, camera go...
View ArticleHow to track an object which is detected using cascade classifier
Hello everyone, I'm new to image processing and OpenCV. I'm working on a project which includes vehicle detection and tracking. Till now, I've successfully trained my own cascade classifier for...
View ArticleCompiling OpenCV 2.4.11 with -O3 flag ?
Hello ! I would like to have some help on the following question: is there any advantage or optimization given by the O3 flag when compiling opencv 2.4.11? The official version compiled with O2 works...
View ArticleCompiling OpenCV 3.1
Hello together, I recently tried to compile OpenCV 3.1 with CUDA8, OpenNI2, Python2.7 on Windows 8.1 with Visual Studio 2015. I built the project "ALL_BUILD", but still e. g. the header files haven't...
View ArticleFace recognizer with camera in portrait mode
Hello. I am running the following https://github.com/ayuso2013/face-recognition in Android Studio (Through the link found in the Readme.md). I am not sure what the fault is that is why i am putting in...
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