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Re: hist_2d question [message #64294 is a reply to message #64291]

Tue, 16 December 2008 09:49

Chris[6]
Messages: 84
Registered: July 2008

Member

On Dec 16, 3:45 am, "Jeff N." <jeffnettles4...@gmail.com> wrote:
> Hi folks,
>
> I'm working with 2d histograms for the first time, and have a question
> the documentation doesn't seem to answer (or i missed it).
>
> Is there a way to construct your bins such that you'll know how many
> output DN your image has? I want to put a color table on my image,
> and have been constructing color tables to match the number of output
> DN, which is fine but i'm wondering if there's a way to ensure 256 DN
> in the output. I'm sure the answer to this question is "make your
> bins right", but i'm wondering if there's a straightforward way to
> calculate how to do that.
>
> Thanks for any help,
> Jeff

I don't know of any easy way to do this, but I assume you want the
__peak__ number of counts in a bin to be 256 (the total number is just
the number of datapoints you feed into the histogram call, unless you
clip out the edges). Why not just use bytscl() to scale the result
afterwards?

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[Message index]

		Re: hist_2d question By: Jeremy Bailin on Tue, 16 December 2008 16:20
		Re: hist_2d question By: jeffnettles4870 on Tue, 16 December 2008 11:19
		Re: hist_2d question By: Chris[6] on Tue, 16 December 2008 09:49

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