Two-stage dither to enhance gray scales based on real-time motion detection in plasma display panel |
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| Affiliation: | 1. School of Electronics and Information Engineering, Anhui University, Hefei, 230026, China;2. CAS Key Laboratory of Electro-magnetic Space Information, University of Science and Technology of China, Hefei, 230027, China;1. National & Local United Engineering Laboratory of Flat Panel Display Technology, Fuzhou University, Fuzhou 350002, China;2. Administration of Xiamen Area of China (Fujian) Pilot Free Trade Zone, Xiamen 361006, China;3. Science college, Jimei University, Xiamen 361021, China;1. Department of Chemistry, Jamia Millia Islamia University, New Delhi 110025, India;2. Department of Chemistry, Aligarh Muslim University, Aligarh 202002, India;3. Department of Bio Chemistry, Aligarh Muslim University, Aligarh 202002, India;4. Department of Chemistry, Govt. Degree College, Sopore 193201, J&K, India |
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| Abstract: | In order to reduce gray scale loss in low and middle-high gray scale ranges which are caused by inverse gamma conversion and limited gray scale method for dynamic false contour (DFC) improvement, respectively, and enhance gray scales both in static and moving regions of an image, two-stage dither based on real-time motion detection method is proposed. Firstly, the image is divided into blocks, and the motion state of each image block is detected according to real-time motion detection method. So limited gray scale method to improve DFC can only be used in moving image blocks. Then, ordered dither and random dither combined with minor pixel separation (MPS) are used to improve gray scale loss caused by inverse gamma conversion and limited gray scale method, respectively. The experimental results show that motion detection can be implemented easily and the detection accuracy is more than 99.3%. The gray scales in moving and static image regions are all expressed smoothly while DFC is markedly improved. |
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| Keywords: | Plasma display panel (PDP) Real-time motion detection Dither Minor pixel separation (MPS) Gray-scale enhancement |
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