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Re: Problem in band operations. [message #88896 is a reply to message #88891]

Wed, 02 July 2014 04:04

SUNIL CHOUDHURY
Messages: 11
Registered: June 2014

Junior Member

On Wednesday, July 2, 2014 12:32:16 AM UTC+5:30, skymaxwell wrote:
> Good day!
>
> Here is the code,which allow to solve your task
>
>
>
>
>
> ENVI_SELECT,FID=image_fid,POS=position_bands, $
>
> DIMS=image_dims,TITLE='Pick file'
>
> IF (image_fid EQ -1) THEN RETURN
>
> ENVI_FILE_QUERY,image_fid,NS=number_samples,NL=number_rows,N B=number_bands, $
>
> INTERLEAVE=data_format,WL=wavelengths
>
> band1=ENVI_GET_DATA(FID=image_fid,DIMS=image_dims, POS=position_bands[0])
>
> band2=ENVI_GET_DATA(FID=image_fid,DIMS=image_dims, POS=position_bands[1])
>
> temp=band1+band2-20
>
> ENVI_ENTER_DATA,temp,BNAMES='Calculated value'
>
>
>
> regards
>
>
>
>
>
> понедельник, 30 июня 2014 г., 14:27:28 UTC+4 пользователь SUNIL CHOUDHURY написал:
>
>> Hi,i am using envi 4.8 .
>
>>
>
>> I have selected some image file using ENVI_SELECT command.
>
>>
>
>> I want to perform some mathematical operation on the bands of the image file like-
>
>>
>
>> b1+b2-20
>
>>
>
>> How to get bands b1 and b2.

Thanks for your reply,it was helpful
but still i have one problem ,
in exp=band1+band2-20 ,only the first two band are selected I want to select the band from the available band list
waiting for your reply

regards

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[Message index]

		Problem in band operations. By: SUNIL CHOUDHURY on Mon, 30 June 2014 03:27
		Re: Problem in band operations. By: skymaxwell@gmail.com on Tue, 01 July 2014 12:02
		Re: Problem in band operations. By: SUNIL CHOUDHURY on Wed, 02 July 2014 04:04
		Re: Problem in band operations. By: skymaxwell@gmail.com on Fri, 04 July 2014 22:18
		Re: Problem in band operations. By: SUNIL CHOUDHURY on Sun, 06 July 2014 22:53

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