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Re: costum stretch an image [message #68880 is a reply to message #68814]

Mon, 30 November 2009 13:22

M. Katz
Messages: 69
Registered: May 2005

Member

I don't know if the gaps in your almost-piecewise continuous mapping
were intentional, but you could try interpolation. As follows...

v = [-12, 0, 36, 48] ;--- output values
x = [0., 36., 72, 76.021912] ;--- input values
xout = (your input array)

output = interpol( v, x, xout )

and to make it all integers in the end, use either floor() or round(),
as you prefer.

output = floor(interpol( v, x, xout ))

This method also preserves the dimensions of xout in the output array.
It should be very fast.

-M.

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[Message index]

		Re: costum stretch an image By: ivitseva on Wed, 02 December 2009 01:15
		Re: costum stretch an image By: David Fanning on Tue, 01 December 2009 11:18
		Re: costum stretch an image By: jeanh on Tue, 01 December 2009 10:02
		Re: costum stretch an image By: ivitseva on Tue, 01 December 2009 08:51
		Re: costum stretch an image By: ivitseva on Tue, 01 December 2009 08:45
		Re: costum stretch an image By: M. Katz on Mon, 30 November 2009 13:22
		Re: costum stretch an image By: David Fanning on Mon, 30 November 2009 10:16
		Re: costum stretch an image By: David Fanning on Mon, 30 November 2009 10:11

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