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首页> 外文期刊>Journal of Imaging Science and Technology >Measurement Problems in Overhead Projection Transparency Printing Color Calibration
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Measurement Problems in Overhead Projection Transparency Printing Color Calibration

机译：投影投影透明色校准中的测量问题

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摘要

The final color quality of overhead projection transparencies depends on the transparency print, the projector, the projection screen, and the viewing environment. For color calibration, there are commercial measurement instruments capable of transparency sample spectral transmittance and transmittance color measurement. However, projection stray light, sample scattering for samples printed with EP technologies, and projector design parallax limitation as in reflective type projectors makes using directly measured transmittance data to represent the projected colors inadequate. In this article, we report our effort and findings on overhead projection transparency color measurement. We devised an automated measurement system based on a spectroradiometer to measure multiple projected colors automatically; the results are compared with that obtained by direct sample transmittance measurement with both diffuse illumination and collimated illumination. We concluded that for superior overhead projection transparency color calibration, projected colors should be measured to compensate for stray light, sample scattering, and projector optical design limitations.
机译：高架投影透明胶片的最终色彩质量取决于透明胶片，投影仪，投影屏幕和观看环境。对于颜色校准，有一些商业测量仪器可以对样品的光谱透射率和透射率进行颜色测量。然而，如在反射型投影仪中那样，投影杂散光，使用EP技术打印的样品的样品散射以及投影仪设计视差限制使得使用直接测量的透射率数据来表示投影颜色是不够的。在本文中，我们报告了有关架空投影透明度颜色测量的努力和发现。我们设计了一种基于光谱辐射仪的自动测量系统，可以自动测量多种投影颜色。将结果与通过漫射照明和准直照明的直接样品透射率测量获得的结果进行比较。我们得出的结论是，为了实现出色的高架投影透明色校准，应该测量投影色以补偿杂散光，样品散射和投影仪光学设计的局限性。

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