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Re: How to read a multi-band image with IDL [message #65047]

Mon, 09 February 2009 09:24

Mort Canty
Messages: 134
Registered: March 2003

Senior Member

shi.bobopan@gmail.com schrieb:
> Hello! I will write a supervised classification programme and want to
> read a multi-band ETM+ image with IDL. But ENVI_GET_DATA function can
> only read one band. It seems that READ_IMAGE function also read gray
> image or RGB imge only. How can I read a multi-band image at one time?
> I am new in IDL. Thank you very much.

Here's how I always do it:

envi_select, title='Choose multispectral image', $
fid=fid, dims=dims,pos=pos

num_cols = dims[2]-dims[1]+1
num_rows = dims[4]-dims[3]+1
num_bands = n_elements(pos)

; BIP array
image = fltarr(num_bands,num_cols,num_rows)

for i=0,num_bands-1 do image[i,*,*] = $
envi_get_data(fid=fid,dims=dims,pos=pos[i])

Mort

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[Message index]

		Re: How to read a multi-band image with IDL By: Mort Canty on Mon, 09 February 2009 09:24
		Re: How to read a multi-band image with IDL By: Jean H. on Mon, 09 February 2009 06:23

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