Object tracking lag problem
Hi, I am using this code for track 4 colored objects.I get video from 8 ps3 eye camera.When i comment // my trackFilteredObject line there is no lag.But when using this code i have lot latency.I cant...
View ArticlePython tutorial to get to OpenCV-Python start
Please suggest good tutorials to learn Python to a point where I can follow the OpenCV-Python code. Ideally video tutorials. Thanks very much. Andy
View ArticleUnable to get Mahalanobis distance
I am trying to find the Mahalanobis distances between a test sample image and a few training data images (At&t database). I took...
View Articleline extration in opencv_contrib
I need detect lines in a image. And I find the line_extraction methods in opencv_contrib. But related cpp files in opencv_contrib cannot be compiled correctly. What should I do? Apart from Hough...
View ArticlePython 3 & Anaconda
Dears, I am starting with OpenCV and building latest OpenCV using MSVC++ 2015, Anacodna 3 (as python distribution). Using CMake for configuring and I am getting ... Found PythonInterp:...
View ArticleROI out of bounds issue
Hello forum, I would like to crop out a part of my image using > Mat crop = frame(_rectangle); The problem is, I get an error when _rectangle is out of bounds of my 1920 x 1080 frame. Is there a...
View ArticleEye Blink detection OpenCV C++
I am trying to write an Blink detection but it does not work properly. It finds the face and eyes properly.then i trying to find a circle in the eye area (Pupil) but it is not always found and when it...
View ArticleOpenCV, CMake w Eclipse Mars
Dears, I'd like to understand configuration for OpenCV build (I have latest source from github). Within CMAKE configuration I specified "Eclipse CDT4 - MinGW Makefiles ". By CMAKE generating then I...
View Articlehow to read image from scanner in opencv2.4.10
i am working on fingerprint detection so i just want that how to read image from scanner in opencv cpp code.
View ArticleWhy is a there a stub for dnn in the reference manual?
Hello, If this is the right place to ask, I was wondering why there is a link to dnn in the reference manual of opencv 3.0. I was trying to find dnn implementation in opencv and came across that. The...
View ArticleLUT must have 1 channel or the number of channels of the input image?!?
Can someone explain me why there is the need of the LUT to have the same number of channels as the input image? I don't even understand, which elements will be chosen... For example if I have a BGR...
View ArticleHave a gradient map of a gray scale image and want to recover the original...
Have a gradient map of a gray scale image and want to recover the original gray scale image.
View ArticleCv2.imshow is not working with any looping structures. The code gets executed...
I've searched a lot, applied it without looping it works fine. But it doesn't pop up a window in looping structures. I'm using ubuntu , Python 2.7.3. Kindly help
View ArticleAdd scalar to particular channel of an opencv image?
What is the most efficient way to add scalar to a particular channel of an opencv image?
View ArticleWindows Python opencv_contrib install doesn't work
Hey everyone, I've got following problem, I want to use sift/surf feature detection with Python OpenCV 3. I followed the install-guide for installing "OpenCV from source" and built the ALL_BUILD and...
View ArticleHow to convert pxcimage into mat
hi, i want to convert pxcimage into mat variable. below is my code: if (psm->AcquireFrame(true)QuerySample(); //retrieve the image or frame by type from the sample colorIm = sample->color;...
View Articleisotropic linear diffusion smoothing
I want to apply the denoising filter I named in the title which is based on the following equations:  where `d` is a scalar constant diffusivity...
View ArticleOpenCV python .avi video doesn't work
Hello. I have a script which uses OpenCV and python and creates a video ( avi format ) from a set of png images. The resolution of these images is good. The problem is that the resolution of the...
View ArticleNo compute method for cv::gpu::HOGDescriptor
Hi, I am trying to build a GPU accelerated SVM detector using HOG in OpenCV 2.4 (cannot upgrade to 3 right now unfortunately). I have noticed that this function below does not exist in the cv::gpu...
View ArticleOpenCV's Java bindings Mat.get() gives weird results
I have a 8UC1 Mat image. I'm trying to convert it to Java 2D byte array with [x][y] coordinates. Here's what I have so far: byte[][] arr = new byte[mat.cols()][mat.rows()]; for (int colIndex = 0;...
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