2004 Fiscal Year Final Research Report Summary
Study on Reduction of Image Quality Degradation on JPEG Image and Restoration of Out-of-Focus JPEG Image
| Project/Area Number |
15500109
|
|---|
| Research Category |
Grant-in-Aid for Scientific Research (C)
|
| Allocation Type | Single-year Grants |
|---|
| Section | 一般 |
|---|
| Research Field |
Perception information processing/Intelligent robotics
|
|---|
| Research Institution | Ryukoku University (2004)
Kyoto Institute of Technology (2003) |
|---|
Principal Investigator |
FUJITA Kazuhiro Ryukoku University, Department of Science and Technology, Associate Professor, 理工学部, 助教授 (90209049)
|
|---|
| Project Period (FY) |
2003 – 2004
|
| Keywords | JPEG / Out-of-Focus / Blocking Artifacts / Mosquito Noise / Image Restoration / 劣化画像復元 |
|---|
| Research Abstract |
[2003]
JPEG images are degraded by blocking artifacts and mosquito noise caused by quantization on the block DCT domain. The purpose of this study is reduction of image quality degradation by means of the image restoration method instead of the smoothing method after the simple decoding. This proposed method is based on the edge-adaptive restoration method ; the regularizing operator depends on the edge orientation, and the regularizing parameter depends on the local activity. The variance of the quantization on the block DCT domain is taken into consideration.
[2004]
JPEG images are degraded by blocking artifacts and mosquito noise caused by quantization on the block DCT domain, and also may be degraded by out-of-focus. The purpose of this study is to make out-of-focus JPEG images sharp without enhancing the blocking artifacts and the mosquito noise. This proposed method is based on the edge-adaptive restoration method ; the regularizing operator depends on the edge orientation, and the regularizing parameter depends on the local activity. The variance of the quantization on the block DCT domain is taken into consideration.
|
