Title :
A CMOS imager for light blobs detection and processing
Author :
Gonzalez, J.L. ; Sadowski, D. ; Kaler, K.V.I.S. ; Mintchev, M.P. ; Yadid-Pecht, O.
Author_Institution :
Dept. of Electr. & Comput. Eng., Calgary Univ., Alta., Canada
Abstract :
Biomedical optical impedance sensors involve image processing of light blobs to extract information regarding a process such as pressure. These sensors utilize a light source to illuminate an imager chip. The edges of the light blob, its diameter and location are parameters of interest to characterize pressure dynamics. CMOS technology allows the capture and processing of an image on a single chip. However, specialized imagers, optimized for extracting dynamic information from light blobs for this application, have not been proposed. A CMOS active pixel sensor (APS) imager, capable of processing all parameters of interest in a light blob, is presented. Innovative, efficient and easy-to-implement techniques for cross-sectional diameter estimation and edge detection are proposed. The simulation results showed the feasibility of the proposed design. This chip was designed using 0.18 μm technology and is currently being fabricated. It operates at 1.8 V.
Keywords :
CMOS image sensors; biosensors; edge detection; integrated circuit design; object detection; optical sensors; parameter estimation; pressure sensors; 0.18 micron; 1.8 V; CMOS active pixel sensor imager; CMOS imager; biomedical optical impedance sensors; chip design; cross-sectional diameter estimation; edge detection; image processing; light blob detection; light blob processing; optical sensors; Biomedical optical imaging; Biosensors; CMOS image sensors; CMOS process; CMOS technology; Data mining; Image edge detection; Image sensors; Optical sensors; Sensor phenomena and characterization;
Conference_Titel :
Circuits and Systems, 2005. ISCAS 2005. IEEE International Symposium on
Print_ISBN :
0-7803-8834-8
DOI :
10.1109/ISCAS.2005.1464651
