Researchers from Kanazawa University recently investigated the grayscale chromaticity of medical color displays, including a presentation at the 2011 RSNA meeting on how a grayscale chromaticity matching technique could be employed using a Nikon D90 commercial digital camera.
"Since the digital camera works as a 2D chromaticity meter, we have extended the technique to a grayscale chromaticity uniformity correction technique," said presenter Katsuhiro Ichikawa, PhD.
This method allows the precise measurement of 2D chromaticity through the whole display area of the display, and easy creation of a uniformity correction map, Ichikawa said.
"By applying the correction map, the delta u'v' values were reduced to approximately 10% to 20%, and thereby the visual un-uniformity was canceled," he said. "The price of the digital camera is one-tenth of those of chromaticity meters, and thus this system can be used in user-level maintenance."
