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Re: envi_get_roi_data [message #62221]

Sun, 31 August 2008 06:05

skymaxwell@gmail.com is currently offline

skymaxwell@gmail.com
Messages: 127
Registered: January 2007

Senior Member

On Aug 31, 12:46 am, "Jeff N." <jeffnettles4...@gmail.com> wrote:
> On Aug 30, 3:06 am, "skymaxw...@gmail.com" <skymaxw...@gmail.com>
> wrote:
>
>> Good day
>
>> i did excercise from ENVI Programming documentation with ROI. from
>> ENVI i create 4 different ROIs.
>> then i use ENVI_GET_ROI_DATA function i get values of my ROI pixels, i
>> printed it
>> for check i use ENVI and use cursor/location option....
>
>> why values are different ? does ENVI_GET_ROI_DATA use some
>> interpolation algorithm?
>
> Did you check to make sure you were handling your indices the right
> way? ENVI routines like ENVI_GET_ROI_DATA will use zero-based
> indices, while in the ENVI GUI (ie, the cursor location/value tool)
> one-based indices are used.

yes, i know about it.

now, i faced with problem.

i use following syntax:

roi_ids=ENVI_GET_ROI_IDS(NS=ns,NL=nl,ROI_NAMES=roi_names,/SH ORT_NAME)

in first runtime i have size of roi_names = 4, the same for roi_ids
second runtime size of roi_names = 8, the same with roi_ids.

why data is appended to roi_names and roi_ids ????

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[Message index]

		Re: envi_get_roi_data By: skymaxwell@gmail.com on Sun, 31 August 2008 06:05
		Re: envi_get_roi_data By: jeffnettles4870 on Sat, 30 August 2008 13:46
		Re: envi_get_roi_data By: devin.white on Sun, 31 August 2008 08:18

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