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Re: Objects in ENVI ROI files [message #84500 is a reply to message #48839]

Wed, 22 May 2013 06:40

zhour.najoui
Messages: 2
Registered: May 2013

Junior Member

I tried the code, but the number of polygons that I got is different from the number of polygons in the file .roi (I Verife using ENVI ==> basic tools ==> region of interest ==> ROI tools).
I thought to do this step on ENVI (ROI TO EVF) and I need to know how to get the number of polygons in each region ROI from my program.
I can get the number of points in each region = n_elements(roi_addr )
but how to get the number of polygons in each region?
here is part of my code :

;----------------------------------
; Load the region_of_interest file
;---------------------------------
envi_restore_rois, region_of_interest ; Restore the ground truth ROIs
if (fid eq -1) then return
roi_ids = envi_get_roi_ids(fid=fid, roi_names=roi_names)
class_ptr = lindgen(n_elements(roi_ids)) + 1
if (roi_ids[0] eq -1) then begin
print, ' ROIs not found'
return
endif

for i=0, n_elements(roi_ids)-1 do begin
roi_addr = envi_get_roi(roi_ids[i], roi_name=name)
ENVI_GET_ROI_INFORMATION,roi_ids, ns=ns, nl=nl, npts=npts

endfor

thanks

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[Message index]

		Objects in ENVI ROI files By: Bradley Wallet on Mon, 22 May 2006 05:22
		Re: Objects in ENVI ROI files By: zhour.najoui on Thu, 16 May 2013 05:23
		Re: Objects in ENVI ROI files By: Josh Sixsmith on Mon, 20 May 2013 22:08
		Re: Objects in ENVI ROI files By: samsammurphy on Thu, 05 March 2015 10:02
		Re: Objects in ENVI ROI files By: Josh Sixsmith on Thu, 23 May 2013 21:22
		Re: Objects in ENVI ROI files By: zhour.najoui on Wed, 22 May 2013 06:40

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