Morton (Z) scan based real-time variable resolution CMOS image sensor

Author

Artyomov, Evgeny ; Rivenson, Yair ; Levi, Guy ; Yadid-Pecht, Orly

Author_Institution

VLSI Syst. Center, Ben-Gurion Univ., Beer-Sheva, Israel

Volume

15

Issue

7

fYear

2005

fDate

7/1/2005 12:00:00 AM

Firstpage

947

Lastpage

952

Abstract

An image sensor architecture with an alternative image scan method, based on Morton (Z) order, is presented. This scan, compared to the conventional row scan, enables faster and efficient average computation of square image blocks. Digital averaging is used and the pixel data is read out with either the original resolution, a 2 × 2 or a 4 × 4 block averaging. A test chip of 128 × 128 array has been implemented in 0.35-μm CMOS technology, has 15% fill factor, is operated by a 3.3-V supply and dissipates 30 mW at video rate.

Keywords

CMOS image sensors; image resolution; Morton order; Z order; active pixel sensor; alternative image scan method; digital averaging; image resolution; real-time variable resolution CMOS image sensor; square image block processing; CMOS image sensors; CMOS technology; Capacitors; Computer architecture; Image resolution; Image sensors; Pixel; Sensor arrays; Signal resolution; Spatial resolution; Active pixel sensor; CMOS; Morton order; averaging; block processing; image sensor; variable resolution;

fLanguage

English

Journal_Title

Circuits and Systems for Video Technology, IEEE Transactions on

Publisher

ieee

ISSN

1051-8215

Type

jour

DOI

10.1109/TCSVT.2005.848338

Filename

1458837