Title :
A CMOS imaging system featuring focal-plane compression based on DPCM and VQ
Author :
Oliveira, Fernanda D V R ; Haas, Hugo L. ; Gomes, José Gabriel R C ; Petraglia, Antonio
Author_Institution :
Electr. Eng. Program, Univ. Fed. do Rio de Janeiro, Rio de Janeiro, Brazil
Abstract :
We recently introduced a new focal plane image compression algorithm that is implemented with 607 transistors inside every 4 × 4 pixel block of a CMOS imager, using conventional 0.35 μm integration technology. This work focuses on preliminary results concerning the overall MTF of an imaging system in which the CMOS imager features focal-plane data compression based on DPCM and VQ with an overall bit rate below 0.94 bpp. Using bar-target pattern inputs, it is shown that details up to 2 cycles/cm are preserved in the decoded images.
Keywords :
CMOS image sensors; focal planes; image coding; vector quantisation; CMOS imaging system; DPCM; MTF; VQ; bar-target pattern inputs; differential-pulse code modulation; focal plane image compression algorithm; modulation transfer function; size 0.35 mum; vector quantization; CMOS integrated circuits; Image coding; Image reconstruction; Modulation; Transforms; Vectors;
Conference_Titel :
Circuits and Systems (LASCAS), 2012 IEEE Third Latin American Symposium on
Conference_Location :
Playa del Carmen
Print_ISBN :
978-1-4673-1207-3
DOI :
10.1109/LASCAS.2012.6180300
