| Presentation | 2012-03-01 Study of the Generality of Bit-length Expansion by Inverse Quantization Process Johji NISHIYAMA, Akira TAGUCHI, |
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| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | The bit-length is decided by the quantization of image capture devices. Therefore the bit-length expansion technique is also necessary for low bit-length captured images. If we expand bit-length of these images by using most bit-length expanding algorithms, pseudo contouring effect is observed in smooth gradient area. The bit-length expansion process and inverse quantization process are equivalent. Inverse quantization is able to perform by suitable filtering. We have already proposed the bit-length expansion method using a nonlinear filter with adaptive window size. Our method was shown effective for bit-length expansion from 4bit to 6bit. In this paper, we confirm the versatility of the proposed method through the bit-length expansion problems from 5bit to 7bit and from 4bit to 7bit. Our method realizes the excellent bit-length expanded results compare to conventional methods in these problems. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | bit-length expansion / inverse quantization process / ε-filtering / 3 bit-length expansion |
| Paper # | SIS2011-54 |
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| Conference Information | |
| Committee | SIS |
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| Conference Date | 2012/2/23(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
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| Registration To | Smart Info-Media Systems (SIS) |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Study of the Generality of Bit-length Expansion by Inverse Quantization Process |
| Sub Title (in English) | |
| Keyword(1) | bit-length expansion |
| Keyword(2) | inverse quantization process |
| Keyword(3) | ε-filtering |
| Keyword(4) | 3 bit-length expansion |
| 1st Author's Name | Johji NISHIYAMA |
| 1st Author's Affiliation | Department of Biomedical Engineering, Tokyo City University() |
| 2nd Author's Name | Akira TAGUCHI |
| 2nd Author's Affiliation | Department of Biomedical Engineering, Tokyo City University |
| Date | 2012-03-01 |
| Paper # | SIS2011-54 |
| Volume (vol) | vol.111 |
| Number (no) | 457 |
| Page | pp.pp.- |
| #Pages | 5 |
| Date of Issue | |