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Win Build error cv::sqrt ambiguous call

Hi, I downloaded opencv for windows from here - http://opencv.org/downloads.html I did cmake. And then building with visual studio 2010. I get a build error in opencv_text...

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Time delay in VideoCapture opencv due to capture buffer

I use a camera to get frames continuesly.In my code,i have use VideoCapture to do that. But when i debug,i find that the frame i got is the old frame. I have asked some guys, they told me that some old...

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Directx9 surface sharing

Is there any updated help on this for 3.0.0? There is nothing listing on this forum, and in the web intel-only examples that are out of date, and other stuff also that seems OOD.

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apply a 3X3 window kernel in an image

I want to apply a 3X3 window kernel in an image and replace the center pixel with the minimum difference between its surrounding pixels. Anybody please provide me with some help. I am new with OpenCV....

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How to know the co-ordinates/angle of the object detected (Rectangular)

Hello, I want to know the co-ordinates or angle with respect to y axis of the object detected. In my case we are detecting rectangular object placed in side the swimming pool or water. I should get the...

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OpenCV Error: Assertion failed (std::abs(dsize.width*2 - ssize.width)

I'm using Xcode on macPro, I got this error but every things looks good. any one can help? #include #include #include IplImage* doPyrDown(IplImage* in, int filter = IPL_GAUSSIAN_5x5){...

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DependencyWalker says missing Dcomp.dll (Opencv 3, x.64, w7, vs14, unmanaged...

I am using OpenCV 300, W7, VS2015(14), C++ unmanaged DLL, DLL called by C#. Everything is x64. I loaded the prebuilt x64 OpenCV 300 files. Everything compiles, but DLL does not load correctly when...

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Психология игрока в онлайн казино

Абсолютное большинство играющих в онлайн игорных заведениях очень хорошо помнят эти немудреные принципы статистики а также теории вероятностей. Но, с упрямством, достойным лучшего применения, пытаются...

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Opencv+kinect one(kinect for windows v2)+linux+libfreenect2/openni?

Hi guys, for a project that I got involved I will need to work with the new xbox one kinect sensor(be careful not the simple kinect from xbox 360 or microsoft kinect v2, though this one seems to be...

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OpenCV Kalman Filter used for position/orientation tracking: wrong results

Hi, I am following the Kalman Filter tutorial mentioned in the [Real time pose estimation tutorial](http://docs.opencv.org/master/dc/d2c/tutorial_real_time_pose.html#gsc.tab=0) on OpenCV 2.4.11, but...

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overhead detection with hough transform?

Hello, I am planning to do a real time head detection with hough transform algorithm and then count the number of detected people in the scene. In this case the camera/webcam is mounted to the ceiling...

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Template matching results from basic SQDIFF method

The provided template matching documentation (/template_matching.html) gives the formulae for the different template matching methods. I needed a simple template matching calculation in my Java code...

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Thresholding outside ROI

Hi everyone I am new to opencv python. I have to find the threshold using mean and stddev for the pixels outside the ROI. How do I do that, please anyone can help me with the code? Thanks

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Unknow exception when using fisheye::calibrate function

hei, guys. I am now working for a fisheye camera calibration and i have stuck for a long time. When my code run to fisheye::calibrate function, there aways has a "unhandled excption". here is my code:...

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grab and process multiple frames in different threads - opencv semi-related

Well as the title says I would like to grab and process multiple frames in different threads by using a circular buffer or more, I hope that you can point me to what is better. For grabbing frames I am...

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Why should an RGB image be converted to grayscale for carrying out...

I am new and naive to OpenCV and image processing. I have an image which is of RGB standard. Why should I convert it grayscale in order to detect blur or apply laplacian operator? Really appreciate...

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Steps for detecting 3 road signs

Hi I m new to opencv and I have a question what are the steps in order to recognise 3 road signs: mandatory left, mandatory right, and stop taken from a webcam . Thank you!

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best resolution for negatives on traincascade?

I'm training a cascade classifier now and it's on the 6th stage and has been there for more than 48 hours so far. It's slowly working through the negatives. I'm wondering if the resolution of the...

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Iam doing density based traffic controlling system in java opencv. Which...

Vehicle count from a traffic camera

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