cv_examples

Node demonstrating Sobel filtering

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Implementation

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Instructions on how to run:

1. Make sure you have a webcam, a linux webcam driver, and opencv installed

2. Install the package "video_stream_opencv"

3. catkin build

4. roslaunch cv_examples sobel_convert.launch

5. You should then see a camera stream of your webcam and then another stream with a simple sobel filter applied

6. If you do not, your camera driver may not be working or you may have to edit the subscription inside of cv_examples/src/sobel_converter.cpp from "/camera/image_raw" to another topic that your video_stream_opencv node is publishing to.

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Changing Things

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To change the sobel filter

Go to sobel_converter.cpp and alter the settings of the opencv functions under "Apply SOBEL filter, bring up window, and publish it"

To not show the image stream

Go to sobel_converter.cpp and sobel_get.cpp and comment out the cv::imshow(...) functions near the end of the code