Spatial noise suppression for LCD displays: noise contrast

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

doi:10.1117/12.844615

Translator Disclaimer

27 February 2010 Spatial noise suppression for LCD displays: noise contrast

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

Author Affiliations +

Proceedings Volume 7627, Medical Imaging 2010: Image Perception, Observer Performance, and Technology Assessment; 762706 (2010) https://doi.org/10.1117/12.844615
Event: SPIE Medical Imaging, 2010, San Diego, California, United States

Abstract

LCD monitors used for radiologic diagnosis exhibit a random spatial gain-fluctuation pattern that can be characterized as multiplicative fixed-pattern noise. Our goal is to use a monitor-particular map of this noise to pre-process mammograms for display. This noise map is obtained by processing a captured image of the monitor screen. In previous work we have demonstrated a method that produces a measurable reduction in the noise level. In this paper we describe the results of our first observer studies and of computer analysis using visual a discrimination model. The result proved to be negative, i.e. the pre-processing provided an insufficient degree of improvement to be judged diagnostically effective. In light of these first results, we have been examining our assumptions and processing methods. We begin with a brief introduction then describe the construction of the noise map and its use in pre-processing. The two key advances follow: the observer-study and the computer-modeling results. Finally, we describe our efforts to understand the relation of our measurement, modeling, and observer results.

Citation Download Citation

William J. Dallas, Hans Roehrig, Jiahua Fan, Elizabeth A. Krupinski, and Jeffrey P. Johnson "Spatial noise suppression for LCD displays: noise contrast", Proc. SPIE 7627, Medical Imaging 2010: Image Perception, Observer Performance, and Technology Assessment, 762706 (27 February 2010); https://doi.org/10.1117/12.844615

ACCESS THE FULL ARTICLE