使用ENVI/IDL载入多波段图像

 方法1：
pro testEnviImg,path
;  compile_opt idl2
;  envi,/restore_base_save_files
;  envi_batch_init
  path = ENVI_PICKFILE(title='pick file')
  envi_open_file, path, r_fid=fid
 
  if (fid eq -1) then return
  ;ENVI_SELECT, fid=fid ,pos=pos
  envi_file_query, fid, dims=dims, nb=nb
  pos = lindgen(nb)
  num_cols = dims[2]-dims[1]+1
  num_rows = dims[4]-dims[3]+1
  image = fltarr(nb,num_cols,num_rows)
  for i=0,nb-1 do image[i,*,*]=$  
  envi_get_data(fid=fid,dims=dims,pos=pos[i])
  tv,image,/true
end

方法2：
pro testenviselect
  envi_select,fid=fid, dims=dims,pos=pos
 
  num_cols = dims[2]-dims[1]+1
  num_rows = dims[4]-dims[3]+1
  num_bands = n_elements(pos)
 
  ; BIP array
  image = fltarr(num_bands,num_cols,num_rows)
 
  for i=0,num_bands-1 do image[i,*,*] = envi_get_data(fid=fid,dims=dims,pos=pos[i])
  tv,image,/true
end