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Search Publications by: John Penczek (Assoc)

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Displaying 1 - 4 of 4

Color Error in the Digital Camera Image Capture Process

April 1, 2014
Author(s)
John Penczek, Paul A. Boynton, Jolene Splett
The color error of images taken by digital cameras is evaluated with respect to its sensitivity to the image capture conditions. A parametric study was conducted to investigate the dependence of image color error on camera technology, illumination spectra

Character contrast under uniform ambient conditions

May 1, 2009
Author(s)
Edward F. Kelley, John Penczek, Paul A. Boynton
The measurement of small-area black regions on a white screen (such as a character stroke) can be subject to large errors because of veiling glare in the detector. Using replica masks can enable more accurate measurements of small-area-black and character

Robustness of display hemispherical reflectance measurement apparatus

October 1, 2008
Author(s)
John Penczek, Edward F. Kelley, Seugkwan Kim
Reflection measurements are critical to the evaluation of display performance under ambient illumination conditions. Various hemispherical reflection methods are evaluated for their suitability and robustness across display technologies. The standard