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Normalize image after running FLAASH [message #88999]

Sun, 13 July 2014 20:42

phamlien24
Messages: 6
Registered: July 2014

Junior Member

pro correct_reflec

fname='D:\Quick\BAoct25_p004_R2C3_rad.dat'
envi_open_file, fname, r_fid=fid,NO_REALIZE=1
ENVI_FILE_QUERY,fid,DIMS=dims,NS=ns,NL=nl,NB=nb, pos=pos
Hi,

I had a Quickbird image and after running the FLAASH, I would like to normalize the image as following: if the pixel>0 or =10000, multiply it by 1; if pixel < or = 0 multiple it by 0; if pixel >0 and <10000 multiple it by its float value and devide the result by 10 000.

I wrote the IDL code as following, but my conditional statement is error. Could you please help me to fix the conditional statement.

Thanks so much for your help.

Lien

My IDL code:
"map_info=envi_get_map_info(fid=fid)
b1 = ENVI_GET_DATA(FID=fid, dims=dims, pos=1)
ns=n_elements(b1[*,0])
nl=n_elements(b1[0,*])
br=fltarr(ns,3,nl)

CASE 1 of
b1 le 0: br(*,0,*) = (b1)*0
b1 ge 10000: br(*,0,*)= (b1)* 1
else: br(*,0,*)= b1*foat(b1)/(10000)
ENDCASE

b2 = ENVI_GET_DATA(FID=fid, dims=dims, pos=1)
CASE 1 of
b2 le 0: br(*,1,*) = b2*0
b2 ge 10000:br(*,1,*)=b2*1
else: br(*,1,*)=b2*foat(b2)/10000
ENDCASE

b3 = ENVI_GET_DATA(FID=fid, dims=dims, pos=2)
CASE 1 of
b3 le 0:br(*,2,*) = b3*0
b3 ge 10000: br(*,2,*)=b3*1
else br(*,2,*)=b3*foat(b3)/10000
ENDCASE

envi_write_envi_file, br, map_info=map_info, out_name='D:\Quick\test', r_fid=fid
END

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[Message index]

		Normalize image after running FLAASH By: phamlien24 on Sun, 13 July 2014 20:42
		Re: Normalize image after running FLAASH By: Phillip Bitzer on Mon, 14 July 2014 16:00
		Re: Normalize image after running FLAASH By: phamlien24 on Mon, 14 July 2014 22:06
		Re: Normalize image after running FLAASH By: phamlien24 on Tue, 15 July 2014 01:20
		Re: Normalize image after running FLAASH By: Josh Sixsmith on Tue, 15 July 2014 05:52
		Re: Normalize image after running FLAASH By: pthlien on Tue, 15 July 2014 20:28

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