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Re: mosaic two images in direct graphics [message #44446 is a reply to message #44362]

Mon, 13 June 2005 09:16

Sebastian
Messages: 5
Registered: June 2005

Junior Member

Thank You. With 1's instead of 0's in the TOTAL function it works and
gives me a quite homogenic dataset. For really smooth images I have to
do a histogram stretch.

Sebastian

Christopher Lee wrote:
> If you want to merge scientific datasets and not pictures,
> you might want to use all the data you have, e.g.
>
> ; data = [n_images, image_x, image_y]
> ;invalid =value of 'black'
> valid=data ne invalid
> new_data= total(valid*data,0)/(total(valid, 0) > 1)
>
> which will give you the averages of overlapping pixels, and probably an
> error message because I haven't tested it. missing data can be handled
> either using WHERE or using a few more terms in the above equation.
>
> Chris.

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[Message index]

		Re: mosaic two images in direct graphics By: Chris Lee on Fri, 10 June 2005 06:28
		Re: mosaic two images in direct graphics By: Sebastian on Fri, 10 June 2005 05:35
		Re: mosaic two images in direct graphics By: David Fanning on Thu, 09 June 2005 13:35
		Re: mosaic two images in direct graphics By: Sebastian on Thu, 09 June 2005 13:13
		Re: mosaic two images in direct graphics By: Chi-Kuei Wang on Thu, 09 June 2005 09:15
		Re: mosaic two images in direct graphics By: Sebastian on Mon, 13 June 2005 09:16

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