AM-coded spectral matching imager using multispectral LED illumination

Author

Kimachi, Akira ; Ikuta, Hisashi ; Fujiwara, Yusuke ; Masumoto, Mitsuharu ; Matsuyama, Hitoshi

Author_Institution

Osaka Electro-Commun. Univ., Neyagawa, Japan

Volume

1

fYear

2003

fDate

4-6 Aug. 2003

Firstpage

807

Abstract

This paper proposes a spectral matching imager using light-emitting diodes (LED´s) that have different narrow-band spectral distributions and also are amplitude-modulated with orthogonal carriers. This imager, which consists of the correlation image sensor, performs pixelwise spectral matching between a reference spectrum and that of the object in each frame, based on spectral-channel-wise temporal correlation between the orthogonal amplitude modulation (AM) carriers. Using a twelve-channel AM-coded multispectral LED light source, this imager successfully discriminated glass pieces of similar color but with different spectral transmittance functions.

Keywords

amplitude modulation; correlation methods; image colour analysis; image matching; image processing equipment; image sensors; light emitting diodes; correlation image sensor; light-emitting diodes; multispectral LED illumination; multispectral LED light source; narrow-band spectral distributions; orthogonal amplitude modulation carriers; orthogonal carriers; spectral matching imager; spectral transmittance functions; spectral-channel-wise temporal correlation;

fLanguage

English

Publisher

ieee

Conference_Titel

SICE 2003 Annual Conference

Conference_Location

Fukui, Japan

Print_ISBN

0-7803-8352-4

Type

conf

Filename

1323486