add it like this: gcc -O2 -Wall $(pkg-config –cflags –libs libv4l2) grabber.c -lv4l2 -o grabber Which means pkg-config –cflags –libs libv4l2 should be isolated… so you can find its value separately and substitute it yourself in the compile command or. Guys, the pkg-config is an external command that finds the right library params. * This software is provided AS IS and it comes with no warranties of any type.Ĭt(CV_CAP_PROP_FRAME_WIDTH,640) Ĭt(CV_CAP_PROP_FRAME_HEIGHT,480) Ĭout << 'Failed to capture an image' << endl ĭouble difference = (end.tv_sec - _sec) + (double)(end.tv_nsec - _nsec)/1000000000.0d Ĭout << 'It took ' << difference << ' seconds to process ' << frames << ' frames' << endl Ĭout << 'Capturing and processing ' << frames/difference << ' frames per second ' << endl * provided that source code redistributions retain this notice. * Redistribution and use in source and binary forms, with or without modification, are permitted * Copyright Derek Molloy, School of Electronic Engineering, Dublin City University However, you should be able to adapt the code to any specific camera. I would highly recommend both of these devices because of the processing power of the Beaglebone black and the high resolution capability of the C920. In this video I use a Logitech C920 and the Beaglebone Black. Finally, I write a small program boneCVtiming.cpp to test the performance of the Beaglebone black for capturing and processing image data. This code uses the OpenCV library which is available on the Angstrom distribution of the Beaglebone. How do you use OpenCV to capture and image process frames so that you can build computer vision applications under Linux on the Beaglebone – I do this using the boneCV.cpp program as described below.How do you capture image frames from a USB webcam under Linux – I do this using the grabber.c source code that again uses Video4Linux to capture raw video frames in the uncompressed PPM format.This raw stream is then wrapped with a H264 header using FFMPEG. How do you capture video from a USB webcam under Linux – I do this using the capture.c source code that uses Video4Linux to capture a raw stream from the USB camera.I look at three different distinct challenges: It is an introductory video that should give people who are new to this topic a starting point to work from. In the video below I look at how you can get started with video capture and image processing on the Beaglebone.

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