00536nam 2201238 45000010005000000030023000050050009000280080041000370820012000780720031000900200018001211000019001392600033001582500006001912450046001976500031002436500037002746500033003111238StarLibrary Marc Built20180430201711 ||||| |||||||||||amh  a621.367 agray tone image processing a81-224-0484-7 aB.B. CHAUDHURI bWILEY EASTERN LIMITED c1993 a2 aTwo-Tone Image Processing and recognition agray tone image processing agray-tone to two-tone conversion atow-tone image preprocessing