Spatial noise suppression for LCD displays

William J. Dallas, Hans Roehrig, Jiahua Fan, Elizabeth A Krupinski, Jeffrey Johnson

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

We deal with monochrome high-resolution LCD monitors used for displaying medical images. We discuss reducing near-pixel-sized components of fixed-pattern noise. This noise is composed of irregularities in the LCD pixel structure and fine background structures between pixels. We display a series of test images on the monitor with controlled LCD digital driving levels or DDL's. A calibrated CCD camera is used to magnify and capture a portion of the monitor for each image. The captured CCD digital values, or DSL's for digital sensor levels, are converted to luminance. This conversion is necessary because we employ a subsequent local-area processing step that relies on linearity of imagespread being in energy flux-density. Because we are working with two digital systems, the CCD camera and the LCD display, there is no continuous map between the CCD DSL's and LCD DDL's. We map the discrete LCD DDL's to a quantized luminance space. Once we have determined the target luminance values, we use an error-diffusion algorithm to select luminance values from the discrete addressable set for each pixel and then map those values to LCD DDL's. The result is a set of adjusted LCD DDL's that reduces the fixed-pattern noise in a locally averaged sense. The portions of the software are presently written in C and portions in Matlab. The noise-suppression algorithm is derived from work by Jiahua Fan.

Original languageEnglish (US)
Title of host publicationProgress in Biomedical Optics and Imaging - Proceedings of SPIE
Volume7263
DOIs
StatePublished - 2009
EventMedical Imaging 2009: Image Perception, Observer Performance, and Technology Assessment - Lake Buena Vista, FL, United States
Duration: Feb 11 2009Feb 12 2009

Other

OtherMedical Imaging 2009: Image Perception, Observer Performance, and Technology Assessment
CountryUnited States
CityLake Buena Vista, FL
Period2/11/092/12/09

Fingerprint

luminance
Liquid crystal displays
Noise
pixels
Display devices
retarding
monitors
CCD cameras
Luminance
charge coupled devices
Pixels
DSL
digital systems
irregularities
Charge coupled devices
linearity
Software
flux density
computer programs
high resolution

Keywords

  • LCD Monitor
  • Noise reduction
  • Noise suppression
  • Spatial noise

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Electronic, Optical and Magnetic Materials
  • Biomaterials
  • Radiology Nuclear Medicine and imaging

Cite this

Dallas, W. J., Roehrig, H., Fan, J., Krupinski, E. A., & Johnson, J. (2009). Spatial noise suppression for LCD displays. In Progress in Biomedical Optics and Imaging - Proceedings of SPIE (Vol. 7263). [726309] https://doi.org/10.1117/12.813999

Spatial noise suppression for LCD displays. / Dallas, William J.; Roehrig, Hans; Fan, Jiahua; Krupinski, Elizabeth A; Johnson, Jeffrey.

Progress in Biomedical Optics and Imaging - Proceedings of SPIE. Vol. 7263 2009. 726309.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Dallas, WJ, Roehrig, H, Fan, J, Krupinski, EA & Johnson, J 2009, Spatial noise suppression for LCD displays. in Progress in Biomedical Optics and Imaging - Proceedings of SPIE. vol. 7263, 726309, Medical Imaging 2009: Image Perception, Observer Performance, and Technology Assessment, Lake Buena Vista, FL, United States, 2/11/09. https://doi.org/10.1117/12.813999
Dallas WJ, Roehrig H, Fan J, Krupinski EA, Johnson J. Spatial noise suppression for LCD displays. In Progress in Biomedical Optics and Imaging - Proceedings of SPIE. Vol. 7263. 2009. 726309 https://doi.org/10.1117/12.813999
Dallas, William J. ; Roehrig, Hans ; Fan, Jiahua ; Krupinski, Elizabeth A ; Johnson, Jeffrey. / Spatial noise suppression for LCD displays. Progress in Biomedical Optics and Imaging - Proceedings of SPIE. Vol. 7263 2009.
@inproceedings{b16a1e9b2bcb4cffb3454f99d4755025,
title = "Spatial noise suppression for LCD displays",
abstract = "We deal with monochrome high-resolution LCD monitors used for displaying medical images. We discuss reducing near-pixel-sized components of fixed-pattern noise. This noise is composed of irregularities in the LCD pixel structure and fine background structures between pixels. We display a series of test images on the monitor with controlled LCD digital driving levels or DDL's. A calibrated CCD camera is used to magnify and capture a portion of the monitor for each image. The captured CCD digital values, or DSL's for digital sensor levels, are converted to luminance. This conversion is necessary because we employ a subsequent local-area processing step that relies on linearity of imagespread being in energy flux-density. Because we are working with two digital systems, the CCD camera and the LCD display, there is no continuous map between the CCD DSL's and LCD DDL's. We map the discrete LCD DDL's to a quantized luminance space. Once we have determined the target luminance values, we use an error-diffusion algorithm to select luminance values from the discrete addressable set for each pixel and then map those values to LCD DDL's. The result is a set of adjusted LCD DDL's that reduces the fixed-pattern noise in a locally averaged sense. The portions of the software are presently written in C and portions in Matlab. The noise-suppression algorithm is derived from work by Jiahua Fan.",
keywords = "LCD Monitor, Noise reduction, Noise suppression, Spatial noise",
author = "Dallas, {William J.} and Hans Roehrig and Jiahua Fan and Krupinski, {Elizabeth A} and Jeffrey Johnson",
year = "2009",
doi = "10.1117/12.813999",
language = "English (US)",
isbn = "9780819475145",
volume = "7263",
booktitle = "Progress in Biomedical Optics and Imaging - Proceedings of SPIE",

}

TY - GEN

T1 - Spatial noise suppression for LCD displays

AU - Dallas, William J.

AU - Roehrig, Hans

AU - Fan, Jiahua

AU - Krupinski, Elizabeth A

AU - Johnson, Jeffrey

PY - 2009

Y1 - 2009

N2 - We deal with monochrome high-resolution LCD monitors used for displaying medical images. We discuss reducing near-pixel-sized components of fixed-pattern noise. This noise is composed of irregularities in the LCD pixel structure and fine background structures between pixels. We display a series of test images on the monitor with controlled LCD digital driving levels or DDL's. A calibrated CCD camera is used to magnify and capture a portion of the monitor for each image. The captured CCD digital values, or DSL's for digital sensor levels, are converted to luminance. This conversion is necessary because we employ a subsequent local-area processing step that relies on linearity of imagespread being in energy flux-density. Because we are working with two digital systems, the CCD camera and the LCD display, there is no continuous map between the CCD DSL's and LCD DDL's. We map the discrete LCD DDL's to a quantized luminance space. Once we have determined the target luminance values, we use an error-diffusion algorithm to select luminance values from the discrete addressable set for each pixel and then map those values to LCD DDL's. The result is a set of adjusted LCD DDL's that reduces the fixed-pattern noise in a locally averaged sense. The portions of the software are presently written in C and portions in Matlab. The noise-suppression algorithm is derived from work by Jiahua Fan.

AB - We deal with monochrome high-resolution LCD monitors used for displaying medical images. We discuss reducing near-pixel-sized components of fixed-pattern noise. This noise is composed of irregularities in the LCD pixel structure and fine background structures between pixels. We display a series of test images on the monitor with controlled LCD digital driving levels or DDL's. A calibrated CCD camera is used to magnify and capture a portion of the monitor for each image. The captured CCD digital values, or DSL's for digital sensor levels, are converted to luminance. This conversion is necessary because we employ a subsequent local-area processing step that relies on linearity of imagespread being in energy flux-density. Because we are working with two digital systems, the CCD camera and the LCD display, there is no continuous map between the CCD DSL's and LCD DDL's. We map the discrete LCD DDL's to a quantized luminance space. Once we have determined the target luminance values, we use an error-diffusion algorithm to select luminance values from the discrete addressable set for each pixel and then map those values to LCD DDL's. The result is a set of adjusted LCD DDL's that reduces the fixed-pattern noise in a locally averaged sense. The portions of the software are presently written in C and portions in Matlab. The noise-suppression algorithm is derived from work by Jiahua Fan.

KW - LCD Monitor

KW - Noise reduction

KW - Noise suppression

KW - Spatial noise

UR - http://www.scopus.com/inward/record.url?scp=67249147046&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=67249147046&partnerID=8YFLogxK

U2 - 10.1117/12.813999

DO - 10.1117/12.813999

M3 - Conference contribution

SN - 9780819475145

VL - 7263

BT - Progress in Biomedical Optics and Imaging - Proceedings of SPIE

ER -