Self synchronization of time delay and integration (TDI) cameras

Author

Baykal, I. Cem ; Jullien, G.A.

Author_Institution

Dept. of Electr. & Comput. Eng., Windsor Univ., Ont., Canada

Volume

1

fYear

2001

fDate

2001

Firstpage

184

Abstract

Time Delay Integration (TDI) is a technology used in line-scan cameras to improve moving image quality. As an image sweeps over the sensor array, the pixels collect charge; at certain intervals the charge in the wells in each of the rows is moved to their adjacent rows, in the same direction and velocity as the moving image. TDI sensors help provide high quality and contrast image even under low illumination as long as image speed is same with the speed of the charge movement. TDI is modeled as a natural sampler and based on the properties of this mathematical model, low complexity algorithms that can fit into an FPGA are developed to self synchronize the TDI based on the change in the high frequency components of the output signal

Keywords

CCD image sensors; cameras; circuit simulation; delay circuits; field programmable gate arrays; logic design; synchronisation; FPGA; Matlab program; TDI sensors; line-scan cameras; mathematical model; moving image; moving image quality; output signal; time delay integration; Cameras; Charge-coupled image sensors; Delay effects; Field programmable gate arrays; Frequency synchronization; Image quality; Lighting; Mathematical model; Pixel; Sensor arrays;

fLanguage

English

Publisher

ieee

Conference_Titel

Circuits and Systems, 2001. MWSCAS 2001. Proceedings of the 44th IEEE 2001 Midwest Symposium on

Conference_Location

Dayton, OH

Print_ISBN

0-7803-7150-X

Type

conf

DOI

10.1109/MWSCAS.2001.986145

Filename

986145