A Proposal of the Modified HSV Colour System Suitable for Human Face Extraction.

Abstract

We have proposed a human-face extraction technique using the HSV colour system and confirmed the effectiveness of this method experimentally. However, the colour black, which is expected to have a lower saturation in the HSV colour system, can not be shown accurately. In the conventional system, this feature has some adverse effects on humam-face extraction. To cope with this problem, a modified HSV colour system is proposed. In the proposed transformation, the saturation is defined as a distance from a chromatic colour. This representation has the following advantages : (1) Black is represented as the colour with lower saturation. (2) While human-skin colours are conspicuous in the conventional system, they are well-emphasized in the proposed system. Computer simulation using 111 pictures with various backgrounds shows an 89% extracting accuracy. From the experimental results, the prospects of using the modified HSV colour system for human-face extraction are encouraging. 1. ‚Ü ‚¦ ‚ª ‚« ŽÀ-p "I Šç ‰ae 'oe"F Ž¯ ƒVƒXƒe ƒ€ ‚ð•\ 'z ‚· ‚é•ã ‚ʼnð OEˆ‚· ‚× ‚«•d-v ‚È‰Û 'è ‚Ì ‚Ð ‚AE ‚ ‚AE‚µ ‚Ä,‰ae'oe"ü-Í Žž‚Ì ŠÂ‹« •Ï "® ‚É'Î ‚· ‚镈-••¸ "x ‚̈À‚̈À'è •« ‚Ì OEü •ã ‚ª ‹" ‚° ‚ç ‚ê ‚é.ŽB 'oe Žž‚É•l •¨ ‚ÌˆÊ‚ÌˆÊ 'u,•AE-¾"™‚É‚Å ‚« ‚é ‚¾‚¯ • §-ñ ‚ð ‚‚¯ ‚È ‚¢ •ó 'Ô‚Å•³ Šm‚ÉŠç ‰ae 'oe‚Ì 'Š •o ‚ª •s ‚í ‚ê ‚é ‚± ‚AE‚ª-] ‚Ü‚ê ‚é ‚ª,‚± ‚Ì ‹Z•p ‚Í OE» •ó ‚Å ‚Í ‹É ‚ß ‚Ä•¢ "ï ‚È‹Z•p ‚Ì ‚Ð ‚AE ‚‚Š‚ ‚é1). ‹ß "N,ŽB 'oe•ð OE•‚Ì ŠÉ˜a ‚ÉOEü‚¯ ‚Ä,"C ˆÓ"wOEi‚©‚ç ‚Ì •l •¨-̈ae ‚Ì 'Š •o ‚â,Žp •¨ ‚ä ‚ç ‚¬‚Ì •â •³ ‚È ‚Ç‚Ì OE¤ ‹ † •¬‰Ê ‚ª •ñ •• ‚³ ‚ê ‚Ä‚¢ ‚é.•¬ •™2)‚Í,ƒ‚ ƒUƒCƒN‚ð-˜-p‚µ ‚ăV•[ ƒ"' † ‚É ‚ ‚éŠç ‚ð Ž© "®OEŸ •õ ‚µ,"F Ž¯ ‚· ‚é •û Ž®‚ð'ñ ˆÄ ‚µ‚Ä ‚¢ ‚é.‚Ü ‚½•Ô•¼ ‚ç3)‚Í,Šç ‚Ì '¢ •ì ‚ð Šî •€ "_ ‚AE‚µ ‚Ä•AE• ‡ ƒL•[ ƒ••[ ƒh:HSV•\ •FOEn,Šç‰ae 'oe"FŽ¯,OE•l Ž¯•Ê,"™"Z•ü•ª •z,MTM-@ 1994"N10OEŽ31"ú,'ae37‰ñ•HŠw‰@ 'åŠw OE¤ ‹ †"-•\ •u‰‰ ‰ï ‚Å "-•\ 1994"N12OEŽ15"úŽó•t,1995"N3OEŽ13"ú •ÄŽó•t •õ•HŠw ‰@ 'åŠw"dŽq•HŠw ‰È(• §163-91"OE ‹ž"s•V •h‹ae•¼ •V •h1-24-2, TEL 03-3342-1111) •õDepartment of Electronic Engineering, Kogakuin University (1-24-2, Nishishinjuku, Shinjuku-ku, Tokyo 163-91, Japan) ƒe ƒOEƒr ƒWƒ ‡ ƒ