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16 September 2005 Correction of the spatial noise of LCD using error diffusion
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Abstract
LCDs are replacing CRTs as primary diagnostic softcopy displays in clinics. They exhibit higher spatial noise than CRTs, which can interfere with diagnosis and reduce the efficiency especially when subtle abnormalities are presented. We have reported recently a study on the LCD spatial noise1. A high quality CCD camera was used to acquire images from the LCD. Noise properties were estimated from the camera images. Then an error diffusion based operation was applied to compensate for the display spatial noise. This paper presents the noise estimation and compensation results on five different LCDs using same processing protocol. These five different LCDs vary in terms of matrix size, pixel size, pixel structure and vendors. The purpose of this work is to demonstrate that the LCD spatial noise estimation and compensation scheme we proposed earlier is valid, robust and necessary for different medical grade LCDs used in clinics today.
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Jiahua Fan, Hans Roehrig, Kunal Gandhi, and Malur K. Sundareshan "Correction of the spatial noise of LCD using error diffusion", Proc. SPIE 5923, Penetrating Radiation Systems and Applications VII, 59230N (16 September 2005); https://doi.org/10.1117/12.624947
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