Canny Edge Detection Steps

As promised in my previous post and in response to a comment  , here is a step by step explanation of the Canny Edge Detector. I have some images from a previous post available here.

Firstly we need to apply a Gaussian Point Spread Function (PSF) to our image. This will make the image seem slightly blurry. Increasing the width of the filter will of course increase the blurriness of the image. A wider filter tends to cause the Canny Edge detector to detect longer smoother lines while a narrow filter allows it to find shorter lines.

Canny Edge Detection

As part of my entry to the CUDA challenge I implemented a Gaussian Point Spread function and a Sobel filter.

I'm not sure how my project went - badly I suppose - as I had only obtained a 8800 GT device a week before deadline :( I'll post the full project here once judging has finished. Actually I will probably keep working on improving it as I beleive there is a lot of scope for a fully implemented version.