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首页> 外文会议>Penetrating Radiation Systems and Applications VII; Proceedings of SPIE-The International Society for Optical Engineering; vol.6707 >Measurement of luminance noise and chromaticity noise of LCDs with a colorimeter and a color camera
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Measurement of luminance noise and chromaticity noise of LCDs with a colorimeter and a color camera

机译：用比色计和彩色相机测量LCD的亮度噪声和色度噪声

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摘要

This communication focuses on physical evaluation of image quality of displays for applications in medical imaging. In particular we were interested in luminance noise as well as chromaticity noise of LCDs. Luminance noise has been encountered in the study of monochrome LCDs for some time, but chromaticity noise is a new type of noise which has been encountered first when monochrome and color LCDs were compared in an ROC study. In this present study one color and one monochrome 3 M-pixel LCDs were studied. Both were DICOM calibrated with equal dynamic range. We used a Konica Minolta Chroma Meter CS-200 as well as a Foveon color camera to estimate luminance and chrominance variations of the displays. We also used a simulation experiment to estimate luminance noise. The measurements with the colorimeter were consistent. The measurements with the Foveon color camera were very preliminary as color cameras had never been used for image quality measurements. However they were extremely promising. The measurements with the colorimeter and the simulation results showed that the luminance and chromaticity noise of the color LCD were larger than that of the monochrome LCD. Under the condition that an adequate calibration method and image QA/QC program for color displays are available, we expect color LCDs may be ready for radiology in very near future.
机译：此次交流的重点是对医学影像应用中显示器的图像质量进行物理评估。我们特别对LCD的亮度噪声和色度噪声感兴趣。在单色LCD的研究中已经遇到了一段时间的亮度噪声，但是色度噪声是一种新型噪声，在ROC研究中将单色LCD和彩色LCD进行比较时首先会遇到色噪声。在本研究中，研究了一种彩色和一个单色3 M像素LCD。两者均以相等的动态范围进行了DICOM校准。我们使用了柯尼卡美能达色度计CS-200和Foveon彩色相机来估计显示器的亮度和色度变化。我们还使用了模拟实验来估计亮度噪声。用比色计进行的测量是一致的。 Foveon彩色摄像机的测量非常初步，因为从未将彩色摄像机用于图像质量测量。但是，它们非常有前途。用色度计进行的测量和模拟结果表明，彩色LCD的亮度和色度噪声大于单色LCD的亮度和色度噪声。在有足够的校准方法和彩色显示器图像QA / QC程序的条件下，我们预计彩色LCD可能会在不久的将来准备好进行放射学检查。

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