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Re: Help needed to create image frames from dataset (mpeg movie) [message #64556 is a reply to message #64548]

Tue, 06 January 2009 06:06

Jean H.
Messages: 472
Registered: July 2006

Senior Member

> Hi,
>
> I think you misunderstood my question.
> I already read David's link. Like you said, that was the first thing
> that popped up.
> My question was not how to make mpeg movies, but how to make the
> matrix for each individual image frame, or the 3d data matrix.
> The above (x, y, t) is not in a matrix format, I wanted something like
>
> At T=1sec,
>
> in 4x4 matrix of x and y,
>
> 0 0 1 0
> 1 0 0 1
> 0 0 1 0
> 0 1 0 0
>
> Which corresponds to (2, 0), (0, 1), (3, 1), (2, 2), (1, 3) in x and y
> coordinates.
> Unfortunately, y coordinates I have are not in integer, but rather
> double precision, and I have hundreds of data set.
> So, I was hoping whether there is a quick way to create matrix out of
> the given data sets.

So, what should be the pixel size?
If it is unitary, there is no problem:

image = bytarr(Xsize,Ysize)
image[x,y] = 1

If you don't want to have the value 1, but rather the number of times a
point fell in this pixel, use histogram instead (hist_2d). Moreover, you
can specify the bin size!

Jean

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[Message index]

		Re: Help needed to create image frames from dataset (mpeg movie) By: loebasboy on Wed, 07 January 2009 01:41
		Re: Help needed to create image frames from dataset (mpeg movie) By: Kim on Tue, 06 January 2009 09:17
		Re: Help needed to create image frames from dataset (mpeg movie) By: Jean H. on Tue, 06 January 2009 06:06
		Re: Help needed to create image frames from dataset (mpeg movie) By: David Fanning on Tue, 06 January 2009 06:19
		Re: Help needed to create image frames from dataset (mpeg movie) By: Kim on Tue, 06 January 2009 05:33
		Re: Help needed to create image frames from dataset (mpeg movie) By: loebasboy on Tue, 06 January 2009 00:24

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