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Yang, Seungjoon
Signal Processing Lab (SPL)
Research Interests
  • Statistical signal processing, multi-rate systems, image/video processing, computer vision

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Efficient nonlinear geometric distortion correction for scanned laser pico projectors

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Title
Efficient nonlinear geometric distortion correction for scanned laser pico projectors
Author
Yun, Joo DongPark, Jong HyukYang, Seungjoon
Issue Date
2015-03
Publisher
INST ENGINEERING TECHNOLOGY-IET
Citation
ELECTRONICS LETTERS, v.51, no.6, pp.471 - 473
Abstract
Scanned laser pico projectors utilising laser light sources and microelectromechanical systems mirror devices introduce geometric distortion to the displayed images because of nonlinear mirror driving methods. A pre-processing algorithm is proposed that corrects the nonlinear geometric distortion of scanned laser pico projectors. The distortion is modelled as blockwise homography transforms. The geometry of the images being displayed is pre-distorted using the pixel indices obtained by the backward blockwise homography transforms. The pre-distorted images are displayed by the pico projector whose geometrical distortion undoes the pre-distortion such that distortion-free images can be displayed. The proposed algorithm requires a small amount of information stored in the memory and three bilinear interpolations per pixel, thus providing an efficient way to correct nonlinear distortion without additional optical components, such as aspherical lenses. © The Institution of Engineering and Technology 2015
URI
https://scholarworks.unist.ac.kr/handle/201301/11144
URL
http://digital-library.theiet.org/content/journals/10.1049/el.2014.4306
DOI
10.1049/el.2014.4306
ISSN
0013-5194
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