Detailed guide how to get OpenCV 2.3.1 up and running under OS X Lion (10.7.2) with Xcode 4.2.1 using MacPorts EDIT 08/06/2012: This is also working for OpenCV 2.4.1. Just make sure you got the latest version of Xcode and installed the “Command Line Tools” (Xcode -> Preferences -> Downloads -> Command Line Tools). EDIT … Read more
A pixel is considered a local maximum if it is equal to the maximum value in a ‘local’ neighborhood. The function below captures this property in two lines of code. To deal with pixels on ‘plateaus’ (value equal to their neighborhood) one can use the local minimum property, since plateaus pixels are equal to their … Read more
If you are using OpenCV 2 or OpenCV 3 you should use IMREAD_* flags (as mentioned at here). C++ using namespace cv; Mat image = imread(“image.png”, IMREAD_UNCHANGED); Python import cv2 im = cv2.imread(“image.png”, cv2.IMREAD_UNCHANGED)
In newer version of OPENCV there is a built in function can be used to do YUV to RGB conversion cvtColor(src,dst,CV_YUV2BGR_YUY2); specify the YUV format after the underscore, like this CV_YUYV2BGR_xxxx
As of OpenCV 2.2.0, the package name for the Python bindings is “cv”.The old bindings named “opencv” are not maintained any longer. You might have to adjust your code. See http://opencv.willowgarage.com/wiki/PythonInterface. The official OpenCV installer does not install the Python bindings into your Python directory. There should be a Python2.7 directory inside your OpenCV 2.2.0 … Read more
So as confirmed in the answer and comment thread with @NAmorim, there are no accessible Python bindings to OpenCV’s various CUDA modules. I was able to get around this restriction by using Cython to gain access to the CUDA functions I needed and implementing the necessary logic to convert my Python objects (mainly NumPy arrays) … Read more
How to install opencv(cv2) with python bindings in Linux – Ubuntu/Fedora Install gcc, g++/gcc-c++, cmake (apt-get or yum, in case of yum use gcc-c++) apt-get install gcc, g++, cmake Downlaod latest opencv from openCV’s website Untar it with tar -xvf opencv-* Inside the untarred folder make a new folder called release mkdir release cd release … Read more
I think you may be thinking of tvecs_new as the camera position. Slightly confusingly that is not the case! In fact it is the position of the world origin in camera co-ords. To get the camera pose in the object/world co-ords, I believe you need to -np.matrix(rotation_matrix).T * np.matrix(tvecs_new) And you can get the Euler … Read more
You should understand that this is not a simple question and you have different concepts you could follow. I will only point out two solution without source-code. Histogram comparison: You could convert both images into grey-scale make a histogram in the range of [0,…,255]. Every pixel-value will be counted. Then use both histograms for comparison. … Read more
This is a linker issue. Try: g++ -o test_1 test_1.cpp `pkg-config opencv –cflags –libs` This should work to compile the source. However, if you recently compiled OpenCV from source, you will meet linking issue in run-time, the library will not be found. In most cases, after compiling libraries from source, you need to do finally: … Read more