Measuring length of skeletonized features
In the images I am analyzing, tiny "filaments" (the medial axis of "blobs") span the space of the window. Is there a function to extract the length of each individual feature? I've tried findContours...
View ArticleChanging Mat dimensions inplace
As part of a larger project, I have some code that does something similar to the following: cv::Mat some_function() { // get some ND-array Mat mat1 = get_some_mat(); vector dims(mat1.size.p,...
View ArticleConvert RGB to XYZ
I have an image in RGB and I need the Y component of CIE XYZ color space. What is difference between grayscale image and the Y component of CIE XYZ color space?
View Articlecvcam properties in VideoCapture
Hi, I know cvcam has long been replaced by the VideoCapture class and a lot of the properties available in cvcam can not be found in VideoCapture, for example: cvcamSetProperty(desiredCam,...
View ArticleI need to track roads and later vehicles in an aerial video[snapshot in...
http://postimg.org/image/vndfjtzg5/
View ArticleOrthomosaic vectorization using coddy edge detection
Dear all, I am MSc student in digital photogrammetry, I have an orthophoto (as shown below) needs to generate a line map (as shown in the free hand sketch) using edge detection filters like Conny,...
View ArticleProblem about background in opencv 2.4.8
Dear all member! The following program displays 'foreground' completely black and not 'frame'. I also checked that all the values in 'frame' is equal to the values in 'foreground'. They have same...
View ArticleQuestion about image from webcame in opencv
Hello everybody. I have read all three or four current threads on this subject that are on the internet, and so far none accurately answer the question. I am fairly new to wxPython, although I have...
View ArticleWhere can I find a dataset for my Automatic Number Plate recognition system...
I need a huge benchmark dataset for my ANPR project to calculate the performance. If anyone know a repository containing this please let me know. Thank you.
View ArticleWhy not work createFisherFaceRecognizer() in opencv java?
I import org.opencv.contrib.faceRecognizer in me project? but when i want use this class i see error, can you help why i can not use this same code bottom? FaceRecognizer rec = new FaceRecognizer();...
View ArticleHow i can add native c++ dll too my java project
Hi,I'm using OpenCV 2.4.9 from Java and I'm having some problems because the Contrib module of OpenCV (which contains the FaceRecognition Algorithms) is not there at the oficial Java wrapper of OpenCV...
View ArticleFire detection using opencv
I have read a comment here http://answers.opencv.org/question/8375/fireflame-detection-using-opencv/ to using cascade classifier but isn't cascade classifier only good for rigid objects?
View Articlewhat kind of reason will lead to this kind of stereorectify result
After calibrate my webcams successfully, I want to stereo rectify views from the two webcams captured at the same time.But the result seems not to be very successful. This is the views before stereo...
View ArticleStack guard exception while using OpenCV for java in eclipse- ubuntu 15.04
i have installed openCV 3.0.1 in ubuntu 15.04, 64 bit. trying to use opencv functions for image keypoint detection. Here is my java code> System.loadLibrary(Core.NATIVE_LIBRARY_NAME);> Mat...
View ArticleBest marker for detection & cam matrix calculation
Hi, I have a following problem that could use community wisdom. I need to design a real word pattern/image that i can put on the floor or stick to wall, that has following features: - can easily be...
View ArticleHow to use opencv_contrib
PLEASE Tell me how to use opencv_contrib... I tried to use it for several days, but it failed. I want to use face.hpp.(Also, I want to run facerec_fisherface.cpp) Could you teach me how to use it step...
View ArticleCheck point isInside matrix
I have been working on a piece of code where I need to work with square ROI scattered throughout the image. Each time I need to check if the patch is really contained inside the image (as efficiently...
View ArticleProblem with PCA::read
I ran into a problem with the PCA::read() function. Saving a PCA object with PCA::write went well (I used XML format), but reading the file didn't go well: - First, there is no...
View ArticleFace detection is very slow
Hi I'm using this [code ](https://gist.github.com/sarmadm/8986e415b5985230717d) for face detection but I have two problems 1. Face detection is very slow when I use video file and normal speed using...
View ArticleWhere is the implementation of _InputArray?
Where is the implementation of _InputArray and _OutputArray in OpenCV codebase?
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