I'm doing some motion detection on a video and while doing the processing, it sometimes is handy to simply skip a couple of frames in order to have a bigger impact on the e.g. optical flow detection. Currently I'm simply loading frames in a loop like that: for ( int i = 0; i < playbackSpeed; i++ ) { originalImage = videoReader.getNextImage (); } Though I'd much rather just skip a couple of ...
Hello, I want to compile my opencv project using cmake. Here is my CMakeLists.txt file cmake_minimum_required (VERSION 2.8) project ( opencv_test ) set (OpenCV_DIR "C:/opencv/build/") find_package (OpenCV REQUIRED) include_directories ( $ {OpenCV_INCLUDE_DIRS} ) add_executable ( opencv_test opencv_test.cpp ) target_link_libraries ( opencv_test $ {OpenCV_LIBS} ) However, I get the following ...
Since images are numpy arrays in OpenCV, we could use concatenate, vstack or hstack to help us achieve the task. The comments in the code should be self explanatory but one thing to be aware of is: 1. Image Channels A coloured and grey scale image have 3 and 1 channels respectively. You cannot just combine their respective matrices together so you need to convert one to the other. With this ...
In opencv exists the function cv::CalibrationMatrixValues that convert from pixels to mm. I want to do the inverse conversion (based on the function's source code).
I just started with OpenCV. I have a small video clip that I want to process frame by frame. That's why I want to be able to access the pixel RGB values via Numpy arrays. What is the best way to accomplish this?
I am using OpenCV 2.4.6 to try to detect white objects in an image that is primarily green-grey. (See the following picture). I have converted this image into the HSV format and these white objects (houses) as expected are converted into a reddish-orange equivalent when printed out. I've been trying to find the values that cover these reddish oranges so I can then use connected components to ...
Hi to all! I need a color conversion from RGB (or BGR) color space into HSI color space. But openCV implements only RGBtoHSV or RGBtoHLS color conversion. Is there a function, a plugin or something else that could make this conversion?? Thanks everybody for your answers!
Then Enter: OpenCV_DIR into the Variable Name, and the path to your OpenCV directory into followed by "opencv\build" into the Variable Value. For more details on step 2. When you download and install the fairly large OpenCV exe, it asks you were you want to extract the data too.
