
Proceedings Paper
Texture-based measurement of spatial frequency response using the dead leaves target: extensions, and application to real camera systemsFormat | Member Price | Non-Member Price |
---|---|---|
$17.00 | $21.00 |
Paper Abstract
The dead leaves model was recently introduced as a method for measuring the spatial frequency response (SFR) of
camera systems. The target consists of a series of overlapping opaque circles with a uniform gray level distribution and
radii distributed as r-3. Unlike the traditional knife-edge target, the SFR derived from the dead leaves target will be
penalized for systems that employ aggressive noise reduction. Initial studies have shown that the dead leaves SFR
correlates well with sharpness/texture blur preference, and thus the target can potentially be used as a surrogate for more
expensive subjective image quality evaluations. In this paper, the dead leaves target is analyzed for measurement of
camera system spatial frequency response. It was determined that the power spectral density (PSD) of the ideal dead
leaves target does not exhibit simple power law dependence, and scale invariance is only loosely obeyed. An extension
to the ideal dead leaves PSD model is proposed, including a correction term to account for system noise. With this
extended model, the SFR of several camera systems with a variety of formats was measured, ranging from 3 to 10 megapixels;
the effects of handshake motion blur are also analyzed via the dead leaves target.
Paper Details
Date Published: 18 January 2010
PDF: 11 pages
Proc. SPIE 7537, Digital Photography VI, 75370D (18 January 2010); doi: 10.1117/12.838698
Published in SPIE Proceedings Vol. 7537:
Digital Photography VI
Francisco Imai; Nitin Sampat; Feng Xiao, Editor(s)
PDF: 11 pages
Proc. SPIE 7537, Digital Photography VI, 75370D (18 January 2010); doi: 10.1117/12.838698
Show Author Affiliations
Jon McElvain, Digital Imaging Systems (United States)
Scott P. Campbell, Digital Imaging Systems (United States)
Scott P. Campbell, Digital Imaging Systems (United States)
Jonathan Miller, Digital Imaging Systems (United States)
Elaine W Jin, Aptina Imaging Corp. (United States)
Elaine W Jin, Aptina Imaging Corp. (United States)
Published in SPIE Proceedings Vol. 7537:
Digital Photography VI
Francisco Imai; Nitin Sampat; Feng Xiao, Editor(s)
© SPIE. Terms of Use
