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How to create an image from the last columns of a stack of images? [message #45395]

Thu, 01 September 2005 00:17

Jeff N.
Messages: 120
Registered: April 2005

Senior Member

Hi everyone,

I have a large image cube(1920x1080x3000 - columns x rows x bands)
from which i need to create a new image from the last column of all the
input bands. Actually, there's a loop involved, the second image to
create is from the set of next to last columns of all the input bands.
I'm wondering how to go about doing this. I could use the ASSOC
function to get to each band without having to read the entire band
into memory, but this is still taking a long time. If I needed to
extract rows rather than columns I'd probably use point_lun in a loop
over each band, but since I need columns I'm not going to be reading
contiguous chunks of data from disk (I don't think), so I'm not sure
thats really efficient either. Anyone have any suggestions?

Thanks,
Jeff

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[Message index]

		How to create an image from the last columns of a stack of images? By: Jeff N. on Thu, 01 September 2005 00:17
		Re: How to create an image from the last columns of a stack of images? By: cgguido on Fri, 09 September 2005 08:10

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