| Presentation | 2006/9/20 Image Enhancement and Zooming by Morphological Operations in Laplacian Pyramid Representation Masayuki SHIMIZU, Makoto NAKASHIZUKA, Youji IIGUNI, |
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| PDF Download Page | PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | Degital image enlargement is equivalent to increasing its sampling frequency. Thus, it is necessary to estimate unknown high frequency components which is lost in sampling process for recovery sharpness of edegs in original images. For this estimation, an image enlargement method based on Laplacian pyramid representation has been proposed. This method estimates a finer scale laplacian by a non-linear operation with thresholding. However, the threshold is constant for entire image pixels, and then for many natural images, the effects of the non-linear operation only apear in a part of the image, where the amplitude of laplacian exceeds the threshold. Moreover, thresholding causes undesirable ringing components beside edges. In this report, we propose a new non-linear operator using morphological operations. The proposed method achives edge enhancement that does not depend on contrast of edges. Moreover, comparing with the thresholding operation, the ringing component is well suppressed. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Image enhancement / image enlargement / Laplacian pyramid / morphology / morphological reconstruction |
| Paper # | SIP2006-77,SIS2006-40,SP2006-63 |
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| Conference Information | |
| Committee | SIS |
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| Conference Date | 2006/9/20(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
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| Paper Information | |
| 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) | Image Enhancement and Zooming by Morphological Operations in Laplacian Pyramid Representation |
| Sub Title (in English) | |
| Keyword(1) | Image enhancement |
| Keyword(2) | image enlargement |
| Keyword(3) | Laplacian pyramid |
| Keyword(4) | morphology |
| Keyword(5) | morphological reconstruction |
| 1st Author's Name | Masayuki SHIMIZU |
| 1st Author's Affiliation | Graduate School of Engineering Science, Osaka University() |
| 2nd Author's Name | Makoto NAKASHIZUKA |
| 2nd Author's Affiliation | Graduate School of Engineering Science, Osaka University |
| 3rd Author's Name | Youji IIGUNI |
| 3rd Author's Affiliation | Graduate School of Engineering Science, Osaka University |
| Date | 2006/9/20 |
| Paper # | SIP2006-77,SIS2006-40,SP2006-63 |
| Volume (vol) | vol.106 |
| Number (no) | 262 |
| Page | pp.pp.- |
| #Pages | 6 |
| Date of Issue | |