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Re: Diplay 2D data [message #57216 is a reply to message #57095]

Thu, 06 December 2007 02:36

lasse
Messages: 48
Registered: February 2007

Member

On 5 Dec, 19:23, pgri...@gmail.com wrote:
> May I ask what is the practical limit in the size of image (in, say,
> megapixel)
> for using this approach before it gets too slow? I agree that your
> idea is
> easier and simpler for small images, but I don't think it works on
> large
> images, because of the overhead of calling polyfill so many times...
>
> Ciao,
> Paolo

Ay caramba, these results are a bit shocking though not surprising.

When using a 300x200 array of random numbers, the difference in
runtime is about 200, something of the order of some milliseconds for
tvscl and just below one second for POLY_FILL. File size is ~3MB vs 64
KB. For a 3000x2000 image the runtime ratio is about 30 (POLY_FILL
takes 90 seconds to complete) and file size is ~294MB vs 6MB.

My spectra are of the order of 4000x100 and take 5 seconds to write as
PostScript.

Cheers
Lasse

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[Message index]

		Diplay 2D data By: lasse on Tue, 04 December 2007 02:26
		Re: Diplay 2D data By: lasse on Wed, 05 December 2007 01:05
		Re: Diplay 2D data By: pgrigis on Wed, 05 December 2007 11:23
		Re: Diplay 2D data By: Brian Larsen on Tue, 04 December 2007 12:52
		Re: Diplay 2D data By: pgrigis on Tue, 04 December 2007 12:43
		Re: Diplay 2D data By: Brian Larsen on Tue, 04 December 2007 12:13
		Re: Diplay 2D data By: wlandsman on Tue, 04 December 2007 11:12
		Re: Diplay 2D data By: lasse on Thu, 06 December 2007 02:36

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