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DarkBASIC Professional Discussion / Basic Motion Dectection

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BlackChaos
16
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Joined: 2nd May 2010
Location: London
Posted: 12th Jun 2012 12:49
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Hey everyone, I'm trying to work out how to detect changes between two static .jpeg images, whilst ignoring other minor changes in the background(noise).

I have a pixel colour match idea and calculating the changes of those pixels.

Also! I know this sounds a bit ambitious but I obsess when I get an idea.

Does anyone have any idea if something like this would be possible in DBPro?

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Pincho Paxton
23
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Joined: 8th Dec 2002
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Posted: 12th Jun 2012 13:19 Edited at: 12th Jun 2012 13:22
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You can get pixel colour at a point with...

R = RGBR(POINT(mousex(),mousey()))
G = RGBG(POINT(mousex(),mousey()))
B = RGBB(POINT(mousex(),mousey()))

... or whatever X/Y you pick up from. Your project is possible. Point is slow, there are other ways.

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BlackChaos
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Posted: 12th Jun 2012 13:57
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Quote: "... or whatever X/Y you pick up from. Your project is possible. Point is slow, there are other ways."


What other ways would there be?

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Pincho Paxton
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Posted: 12th Jun 2012 15:50 Edited at: 12th Jun 2012 15:57
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col = POINT(mousex(),mousey())
R = RGBR(col)
G = RGBG(col)
B = RGBB(col)

well that reduces the point detection. I think that there are also mathematical ways to detect a change in a bitmap.. like XOR, but I don't know how to program that.

You might also find a faster point command in a plugin like MatrixUtils.

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mr Handy
18
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Joined: 7th Sep 2007
Location: out of TGC
Posted: 15th Jun 2012 12:47
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I have an idea, you could try that!

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