模擬高速印刷環境下之色彩檢測準確度評估

Evaluation of the Accuracy of Color Measurement under High Speed Printing Environment

江瑞璋(Raymond Jiang) ； 孫沛立(Pei-Li Sun)

《中華印刷科技年報》 2014 (2014/04) Pp. 70-77

摘要

本研究探討高速印刷週期性抖動下，利用相機作非接觸式色彩量測的準確程度。本研究透過高速馬達運動，模擬印刷的週期性波動。振幅範圍在1~4mm之間，轉速達每小時18,000轉。與靜止時的色塊比較發現高振幅環境下，平均色差高達4.2E。易造成色彩品質的誤判，需要研發更精確的高速色彩量測方式。

關鍵字

色彩量測 ； 印刷品質 ； 高速檢測 ； 機器視覺 ； 相機色彩校正

並列摘要

The present study aims to investigate the accuracy of camera-based color measurement under periodical vibrating printing conditions. A high speed motor with crooked color disks were used to simulate the periodical printing vibration. The amplitude was between 1 to 4 mm to simulate a high speed web printing at 18,000 revolutions per hour. The results show that the mean color differences measured by the camera was as high as 4.2 E compared with static state. The differences are big enough to cause worng quality control. The results suggest a more sophisticated camera-based system is needed to achevie accuracy color measurement in the vibrating conditions.

並列關鍵字

color measurement ； printing quality ； high speed inspection ； mechine vision ； camera color calibration

參考文獻

(ISO 17321 WD 4, Colourcharacterisation of digital still cameras usingcolour targets and spectral illumination; 1999.).

Berns, R.S.,Shyu, M.J.(1995).Colorimetric characterisation of a desk-top drumscanner using a spectral model.J Electronic Imag.4,360-372.

Hong G.W.,Luo, M. R.,Rhodes P.A.(2001).A Study of Digital CameraColorimetric Characterization Based on Polynomial Modeling.Colour Research and Application.26(1)

Hung, P.C.(1993).Colorimetric calibration in electronic imaging devices using alook-up table model and interpolations.J Electronic Imag.2,53-61.

Hung, P.C.(1991).Colorimetric calibration for scanners and media.Proc SPIE.1448,164-174.