Study on Reduction Methods of Moiré Noise in Image Acquisition of Periodic Gray-Scale Pattern
✍ Scribed by Jun Mochizuki; Toshio Asano
- Publisher
- John Wiley and Sons
- Year
- 2002
- Tongue
- English
- Weight
- 502 KB
- Volume
- 33
- Category
- Article
- ISSN
- 0882-1666
- DOI
- 10.1002/scj.1097
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✦ Synopsis
Abstract
Creating valid digital images for display surfaces is vital for the quantification of display quality (defects, spots) for display devices. However, when imaging a spatially discrete display surface using individual acquisition elements, an acquisition moiré appears in the acquisition image. In this paper the authors quantify the display acquisition image, then clarify how to find the acquisition moiré from the dimensions of the display system and acquisition target using computations. Based on these results, the authors formulate a method for determining a pixel shift which inverts the moiré phase in a pixel‐shifted image. They then propose a method to compute the average in pixel units of gradations between a reference image and a pixel‐shifted image given by a reference image and a pixel‐shifted image created using the above method. Finally, they verify the effects of reducing the acquisition moiré using simulations. © 2001 Scripta Technica, Syst Comp Jpn, 33(1): 27–37, 2002