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c++ Programming Glossary: grayscaleOpenCv 2.3 C - How to isolate object inside image http://stackoverflow.com/questions/10315551/opencv-2-3-c-how-to-isolate-object-inside-image the bounding box technique being executed on a grayscale version of the image. This is pretty much the roadmap to achieve..
Setting ROI with mouse from a rectangle on a video http://stackoverflow.com/questions/10881397/setting-roi-with-mouse-from-a-rectangle-on-a-video case. The following code sets the ROI performs a simple grayscale processing on it and then copies the processed ROI back to the.. box Allocate space for a single channel ROI to store grayscale frames IplImage gray_roi cvCreateImage cvSize box.width box.height.. perform some processing in this case converting the ROI to grayscale cvSetImageROI vid_frame box cvCvtColor vid_frame gray_roi CV_BGR2GRAY..
Convert RGB to Black & White in OpenCV http://stackoverflow.com/questions/1585535/convert-rgb-to-black-white-in-opencv improve this question AFAIK you have to convert it to grayscale and then threshold it to binary. 1. Read the image as a grayscale.. and then threshold it to binary. 1. Read the image as a grayscale image If you're reading the RGB image from disk then you can.. the RGB image from disk then you can directly read it as a grayscale image like this C IplImage im_gray cvLoadImage image.jpg CV_LOAD_IMAGE_GRAYSCALE..
http://stackoverflow.com/questions/3907028/opencv-process-every-frame allocates a new image to save the result of the grayscale conversion and returns it. This means you must free this frame.. our custom callback to convert a colored frame to its grayscale version. Remember that you must deallocate the returned IplImage.. so it prints the current framerate and performs a manual grayscale conversion . They are small tweaks on the code and I did it..
how to convert an opencv cv::Mat to qimage http://stackoverflow.com/questions/5026965/how-to-convert-an-opencv-cvmat-to-qimage improve this question Here is code for 24bit RGB and grayscale floating point. Easily adjustable for other types. It is as..
How can I read BMP pixel values into an array? http://stackoverflow.com/questions/5751749/how-can-i-read-bmp-pixel-values-into-an-array on Windows and I'm trying to extract the pixel values of a grayscale bmp. I don't care about keeping any of the metadata and just..
Audio output with video processing with opencv http://stackoverflow.com/questions/8187745/audio-output-with-video-processing-with-opencv or as IplImage. For educational purposes applying a lame grayscale conversion IplImage ipl_frame frame for int i 0 i ipl_frame.width..
http://stackoverflow.com/questions/9860667/writing-robust-color-and-size-invariant-circle-detection-with-opencv-based-on preprocess the image apart from the simple mapping into grayscale. Thus missing those faint yellow blobs in your images is expected...
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