From Newsgroup: comp.programming
Hello.....
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I will wait You there patiently, but I may not be all the time there.
On Tuesday, December 6, 2022 at 12:52:35 PM UTC+2, Malcolm McLean wrote:
I'm working on a problem where a user enters a degraded, wiggly curve (it's actually created by tracing software from what might have been once a rectangle, for example, but has been physically printed, then scanned, and so on, so that there are plenty of stray pixels picked up by the tracing software).
So basically what I want to do is sample the curve at a fairly low resolution, then re-fit it, to get rid of the noise. However I want to retain the genuine sharp corners. So in the rectangle case, the desired output wouldn't be a mathematical rectangle, but it would be four clean almost straight curves, connected by four corners of almost ninety degreees.
The curve tends to go back on itself. It's like a coastline. It's easy to pick out the real curve from the noise by eye, but harder to do it automatically.
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