2011 Fiscal Year Final Research Report
Stability Guarantee of All-Pass Multi-Dimensional Variable Fractional-Delay Filter and High-Accuracy Image Interpolation
| Project/Area Number |
21560415
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Communication/Network engineering
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| Research Institution | Toho University |
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Principal Investigator |
ITO Noboru 東邦大学, 理学部, 教授 (00237041)
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| Project Period (FY) |
2009 – 2011
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| Keywords | 可変非整数フィルタ / 全域通過フィルタ / 安定性保証 / 画像補間 |
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| Research Abstract |
Image interpolation is required in various digital signal processing(DSP) applications. For example, if one wants to increase the resolution of an image, an image interpolator must be used to interpolate the image. A practical example is the zooming operation used in digital camera, where the image resolution is to be frequently adjusted. In this research, we developed a new interpolation technique that utilizes a new type of digital filter called variable fractional-delay(VFD) filter to achieve high-accuracy image interpolation. As long as an accurate all-pass VFD filter can be designed, more accurate image interpolation than the conventional methods like linear interpolation and cubic interpolation can be achieved.
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