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Re: Calculating a mean band [message #54825]

Wed, 11 July 2007 08:48

Conor
Messages: 138
Registered: February 2007

Senior Member

On Jul 11, 11:32 am, "Jean H." <jghas...@DELTHIS.ucalgary.ANDTHIS.ca>
wrote:
> Julio wrote:
>> Hi there!
>
>> Very simple question... I have a multi-band image (36 bands) and I
>> need to calcultate the average of the bands, pixel by pixel.
>
>> If I do that:
>
>> average_array=mean(multi_band)
>
>> I get a single value, because it doesn't work pixel by pixel. So, how
>> can I do to make a mean band of all the 36 bands??
>
>> Comments welcome.
>
>> Best!
>> Julio
>
> Hi,
>
> You can easily make the sum of you band along a dimension... so
> average_array = total(multi_band, 3) / nbOfBands
>
> Jean

You could also do it this way, assuming image=fltarr(x,y,36)

mean_image = rebin(x,y,1)

I'm not sure which way is faster

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[Message index]

		Re: Calculating a mean band By: Conor on Wed, 11 July 2007 08:48
		Re: Calculating a mean band By: Jean H. on Wed, 11 July 2007 08:32
		Re: Calculating a mean band By: greg.addr on Wed, 11 July 2007 08:30

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