Region Of Interest Ascii - IDL

An IDL little snippet to read Regions of Interest from an ascii file

function load_roi, file_name
    ; Open file in read-only mode.
    openr, fd, file_name, /GET_LUN
    
    ; Read total pixel from 1 ROI.
    size = 0
    readf, fd, size
    
    ; Read the indices of the pixels in the ROI
    result = intarr(size)
    readf, fd, result
    
    ; Close the file.
    close, fd
    
    return, result
end

Coded by Sil!