Painterly / Stroke Rendering / Edge Detection

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bluesodium

Painterly / Stroke Rendering / Edge Detection

in General Discussion • Other • 1 year ago

I have been looking at painterly rendering of images, and have come up with some image processing code but it is fairly crude (using ellipses rectangles, opacity etc).

I noticed that John Balestrieri http://2002-2010.tinrocket.com/projects/programming/strokerendering/index.html has some great examples on his site (using his own code not Processing).

To get better results obviously I would need some sort of edge detection and was wondering if anybody had any pointers.

Additionally, I wondered if there was any code or libraries that would help with the brush strokes themselves.

Thanks in advance

Chris

Replies(3)

artsnova

Re: Painterly / Stroke Rendering / Edge Detection

11 months ago

Hi Chris,
I've written a number of image processing routines with edge detection being a subroutine in one of them. What I did was convert the C code from an image processing book into Processing code. If you google:
"edge detection" "image processing"
you'll get a number of hits.
Note: I'd avoid the hits for Matlab (unless you know Matlab) as it is sufficiently different from Java as to not be useful.

As to brushstroke libraries, I have not heard of any. You may want to investigate the use of particles as stand-ins for the bristles of a brush if that is the effect you're going after.

Best Regards, Jim

bluesodium

Re: Painterly / Stroke Rendering / Edge Detection

11 months ago

Thanks very much Jim, I will take a peak and try and find the most suitable edge detection algorithm.

There seems to be a few!

I have tried particle brushes before and they look a little false. I guess its because they don't follow any contours of the image being processed. They look a little random.

I think with edge detection it might help quite a bit. I'm not looking for an exact replica of oil paint, maybe more of an abstract approach.

Much appreciated, Chris

artsnova

Re: Painterly / Stroke Rendering / Edge Detection

11 months ago

Hi,
Regarding particle brushes, what you say is true if you are using them to randomly "paint" an alternative version of a photograph. However, if tightly controlled and you use the Wacom tablet plugin library you can get reasonable results.

Best Regards, Jim

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