DocumentCode :
2773290
Title :
Close-loop image adjustment subsystem in digital printing
Author :
Xiao, Song ; Yubin Xia ; Yan, Lei ; Jiang, Yuxiang
Author_Institution :
Dept. of Electron., Peking Univ., Beijing, China
fYear :
2000
fDate :
2000
Firstpage :
222
Lastpage :
226
Abstract :
We have just developed a digital printing system in which the traditional negative film is replaced by the LCD. Since the image displayed on the LCD is influenced by the illuminant derived from the three dichroic mirrors (RGB), and gamma adjustment proceeded in the signal processor IC. We put forward a close-loop image adjustment subsystem including some hardware and a set of effective algorithms. The image adjustment is proceeded by detecting the RGB intensity of the image on the LCD through image sensors, and transferring it to the computer, and then setting the relationship between the image in the computer and the data from the image sensor by the algorithms. As a result, we can get the perfect photo image
Keywords :
closed loop systems; colour displays; image sensors; liquid crystal displays; printing; IC signal processor; LCD; close-loop image adjustment subsystem; dichroic mirror; digital color printing system; gamma adjustment algorithm; image sensor; photofinishing; random error; system error; Circuits; Color; Computer errors; Digital printing; Error correction; Image sensors; Lenses; Lighting; Machine vision; Signal processing algorithms;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
National Aerospace and Electronics Conference, 2000. NAECON 2000. Proceedings of the IEEE 2000
Conference_Location :
Dayton, OH
Print_ISBN :
0-7803-6262-4
Type :
conf
DOI :
10.1109/NAECON.2000.894914
Filename :
894914
Link To Document :
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