Iterating over cv::Mat
I spent a some time today struggling with a simple task of iterating over the pixels of an image that I read into a cv::Mat. I ended up using “pointer to row” approach. As an example, here is a manual...
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Depth from diffusion
The above picture is a depth map based on how blurred the image is. The blurriness is measured based on the standard deviation of a window around every pixel in the image. Prior to this calculation a...
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OpenCV
I wanted to test if certain points were inside a contour boundary and I was happy to find that OpenCV had a function for this! However the OpenCV documentation for this function was a bit confusing....
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Undistortion for Gibbon
Last week, Nathan finished another great contribution to Gibbon. There is now a way to calibrate the image from the camera and correct the distortion caused by a wide angle lens. This process is also...
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Finger orientation and more progress on depth sensing
Last few days I add a few more nice features to Gibbon. I spend hours trying to adjust and tweak the parameters for optical flow tracking to get a more consistent and stable result. I also tried four...
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Upgrading to OpenCV 2.3
I decided it was time to catch up with the latest development in OpenCV library. I was running version 2.1 so the update (hopefully) should not break anything. I followed this tutorial for installing...
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Gibbon – UI Update
Gibbon UI updates: Image from an external observer camera is mixed in with the computer vision tracking output. The result is captured and stored in realtime. An important purpose of Gibbon, besides...
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