An Hadamard transform chip using the PWM circuit technique and its application to image processing

Katayama Kousuke; Iwata Atsushi; Morie Takashi; Nagata Makoto

An Hadamard transform chip using the PWM circuit technique and its application to image processing

Katayama Kousuke, Iwata Atsushi, Morie Takashi, Nagata Makoto

Research output: Contribution to journal › Article › peer-review

Abstract

A circuit that carries out an Hadamard transform of an input image using the pulse width modulation technique is proposed. The proposed circuit architecture realizes the function of an Hadamard transform with a full-size pixel image. A test chip that we designed and fabricated integrates 64 × 64 pixels in a 4.9mm × 4.9mm area, with 0.35 μm CMOS technology. The functional operation and linearity of this chip are measured. An image processing application utilizing this chip is demonstrated.

Original language	English
Pages (from-to)	1596-1603
Number of pages	8
Journal	IEICE Transactions on Electronics
Volume	E85-C
Issue number	8
Publication status	Published - 2002 Aug
Externally published	Yes

Keywords

Charge sharing
Hadamard transform
Image sensor
Pulse width modulation technique

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Electrical and Electronic Engineering

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abstract = "A circuit that carries out an Hadamard transform of an input image using the pulse width modulation technique is proposed. The proposed circuit architecture realizes the function of an Hadamard transform with a full-size pixel image. A test chip that we designed and fabricated integrates 64 × 64 pixels in a 4.9mm × 4.9mm area, with 0.35 μm CMOS technology. The functional operation and linearity of this chip are measured. An image processing application utilizing this chip is demonstrated.",

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AU - Atsushi, Iwata

AU - Takashi, Morie

AU - Makoto, Nagata

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N2 - A circuit that carries out an Hadamard transform of an input image using the pulse width modulation technique is proposed. The proposed circuit architecture realizes the function of an Hadamard transform with a full-size pixel image. A test chip that we designed and fabricated integrates 64 × 64 pixels in a 4.9mm × 4.9mm area, with 0.35 μm CMOS technology. The functional operation and linearity of this chip are measured. An image processing application utilizing this chip is demonstrated.

AB - A circuit that carries out an Hadamard transform of an input image using the pulse width modulation technique is proposed. The proposed circuit architecture realizes the function of an Hadamard transform with a full-size pixel image. A test chip that we designed and fabricated integrates 64 × 64 pixels in a 4.9mm × 4.9mm area, with 0.35 μm CMOS technology. The functional operation and linearity of this chip are measured. An image processing application utilizing this chip is demonstrated.

KW - Charge sharing

KW - Hadamard transform

KW - Image sensor

KW - Pulse width modulation technique

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