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Re: particle detection - a way to speed up things? [message #57067 is a reply to message #56944]

Fri, 30 November 2007 08:02

dcleon@gmail.com
Messages: 12
Registered: November 2007

Junior Member

>> In order to calculate the absolute position of a particle, I need to
>> know where on an image it resides. I think I'll loose this information
>> with this approach.
>

Not necessarily. You just pass the position of the corner of the
subset to
the routine that calculates the center, or you could add the position
of
the corner of the subset to the value returned by your routine that
computes
the position of the particle relative to the image subset. Its linear
so the
position of the center of the image with respect to subset + the
position of
the subset is the same as the position of the particle relative to the
whole image.

This approach would be easier to implement than the HISTOGRAM approach
I mentioned.

cheers
dave

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[Message index]

		particle detection - a way to speed up things? By: Ingo von Borstel on Wed, 28 November 2007 05:40
		Re: particle detection - a way to speed up things? By: dcleon@gmail.com on Fri, 30 November 2007 08:02
		Re: particle detection - a way to speed up things? By: Dan Larson on Mon, 03 December 2007 08:30
		Re: particle detection - a way to speed up things? By: Vince Hradil on Fri, 30 November 2007 06:02

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