DocumentCode :
3541647
Title :
High-speed sensing system for depth estimation based on depth-from-focus by using smart imager
Author :
Yokota, Arimitsu ; Yoshida, Takashi ; Kashiyama, Hideki ; Hamamoto, Takayuki
Author_Institution :
Dept. of Electr. Eng., Tokyo Univ. of Sci., Japan
fYear :
2005
fDate :
23-26 May 2005
Firstpage :
564
Abstract :
The paper proposes a new sensing system for depth estimation based on depth-from-focus (DFF). The DFF technique uses a search for the most in-focus position over a sequence of images taken by varying a camera parameter, "focus", little by little; therefore, high spatial and temporal resolution cannot be achieved because of the output bottleneck of the image sensor. In the proposed system, the limitation is improved by using a smart CMOS image sensor integrated with an in-focus detection function. We have designed and fabricated the smart sensor that operates at 1500 fps and the depth estimation can be done at 30 Hz and 50 depth steps. Moreover, an interpolation processing for correcting estimation errors is performed on an FPGA outside the sensor. We show some simulation results to demonstrate the effectiveness of the proposed system.
Keywords :
CMOS image sensors; field programmable gate arrays; image sequences; intelligent sensors; interpolation; optical focusing; parameter estimation; 30 Hz; FPGA; depth estimation; depth-from-focus; estimation error correction; high-speed sensing system; image sequence; in-focus detection function; in-focus position; interpolation processing; smart CMOS image sensor; smart imager; spatial resolution; temporal resolution; CMOS image sensors; Cameras; Estimation error; Field programmable gate arrays; Focusing; Image resolution; Image sensors; Intelligent sensors; Interpolation; Spatial resolution;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Circuits and Systems, 2005. ISCAS 2005. IEEE International Symposium on
Print_ISBN :
0-7803-8834-8
Type :
conf
DOI :
10.1109/ISCAS.2005.1464650
Filename :
1464650
Link To Document :
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