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Hi, I am using ENVI/IDL language to batch classify images via K-means method.
In this process, I need to mask out zero values in images.
When I run my codes, it shows me this error message:
ENVI retrieve data: An error has occurred during processing.
Error: "POINT_LUN: negative position argument not allowed. Position: -1600, Unit: 106, File: d:\mask3."
Here is my code:
e=envi()
outfile='d:\test2class.img'
infile='d:\test2' ; test image file
envi_open_file, infile, r_fid=infid
mfile='d:\mask3' ; mask file
envi_open_file, mfile, r_fid=mfid
envi_file_query,infid,dims=dims,nb=nb ; dims=[400,400] nb=6
envi_doit,'class_doit', $
fid=infid, $
dims=dims, $
pos=lindgen(nb), $
method=7, $
num_classes=5, $
iterations=1, $
change_thresh=0.05, $
m_fid=mfid, $
out_name=outfile
I found that when I was adding the mask file (m_fid=mfid) into the function "class_doit" the above mentioned error occurred.
My ENVI version is 5.0.
Anyone knows why?
Thanks in advance.
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