Tagged Questions

OpenCV (Open Source Computer Vision) is a cross-platform library of programming functions for real time computer vision. It was officially launched by Intel in 1999 and is now supported by Willow Garage. Uses include: Human-Computer Interaction; Object Identification, Segmentation and ...

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OpenCV246 and Qt LNK1104 cannot open file lib.obj

I have this strange error in Qt: LNK1104: cannot open file 'C:\OpenCV246PC\build\x86\vc10\lib.obj' Settings in Qt are all the same as in VS2010 (where they work fine), but here Qt is complain about ...
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Electrical Resistor Calculation using OpenCV

I want to calculate the e resistor with image processing techniques. I searched a lot and came to this approach that first of all segment the image according to a specific color(for example red) then ...
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OpenCV TypeError: contour is not a numpy array, neither a scalar

I'm trying to use OpenCV to extract tags from Nike images. This is a tutorial code taken from: http://opencv-code.com/tutorials/ocr-ing-nikes-new-rsvp-program/ I've modified few lines of code though ...
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OPENCV cannot read 2 video frames simultaneously

I've written this code while (true) { cv::Mat frame1,frame2,dst,temp; if (!input_video.read(frame1)) { fprintf(stderr, "Video has Finished .\n"); getchar(); return ...
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Error while using android-ndk-r8d with OpenCV

I'm recently start studying OpenCV library for which I use NVIDIA's Tegra Android Developer Pack 2.0r4(TADP) which includes all setup you can see this link. The Error is occur when I try to use jni, I ...
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OpenCV concave and convex corner points of polygons

Problem I am working on a project where I need to get the bounding boxes of dumbell like shapes. However, I need the fewest points possible, and the boxes need to fit the shapes at all corners. ...
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37 views

The .exe program stopped working correctly

I am having the following output with WinDbg when debuging the .exe file of an application that is built with VS2010. In fact, when i run this .exe file, i get an error message saying that "a problem ...
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Detecting colored objects on a image which contains a dark background

I'm currently using OpenCV to try to detect objects on a black cloth covered table. The camera will not always be looking at the same direction (it's a robot's head) but only one image will be ...
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Camera preview freezed after switching camera

I am developing an Android application, and I use opencv libraries, in 2.4.5 version, for this purpose. I am basing my application on this tutorial, taken from the set of tutorials contained in the ...
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How can I draw a circle with antialiasing and gaussian line intensity using EmguCV (OpenCV)?

I need to draw the most perfect circle possible. EmguCV seems to lack an anti-aliasing option. I'm trying to use SmoothGaussian, but the circle still does not look good/smooth enough. Also, the ...
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1answer
21 views

OpenCV VideoCapture can't read from my webcam at all

I'm using OpenCV 2.4.6 on Ubuntu 13.04 (on an Acer C7 Chromebook), and I'm using a simple test program to see if my webcam will work with OpenCV. It works fine with Cheese and Skype, so I know that ...
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Translating python line to c++ opencv

i'am currently working to translate a python program to c++ I have converted over 98% of the program to c++ however there''s one line I am stuck on. I'm currently using opencv and I believe it has ...
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Python Program will only run once

Whenever I click 'run module' it will run the program. But if I try to run it after this first time I get an error message and it won't run. To run it again I have to close out of the python program ...
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Illumination normalization in OpenCV

I am working on a face recognition project. I have pictures with different lightnings so I need to do illumination normalization. I read a paper which which claims to do illumination normalization. ...
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2answers
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Whats the meaning of minHessian (Surffeaturedetector)

what does minhessian exactly mean in the following case int minHessian = 50; SurfFeatureDetector detector( minHessian); I have read that it is a threshold...but what does it mean?...That only 50 ...

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