Niblack, Wayne. <br/><br/>
An introduction to digital image processing / 
Wayne Niblack. 
 - Englewood Cliffs, N. J. :  Prentice-Hall International,  1986 
 - 215 p. :  ill. ;  23 cm. 
<br/><br/> Includes index. 
<br/><br/>p. 207-210 
<br/><br/><label>ISBN: </label>0134806743 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Image processing--Digital techniques.