Spatially Adaptive Intensity Bounds for Image Restoration
<p/> <p>Spatially-adaptive intensity bounds on the image estimate are shown to be an effective means of regularising the ill-posed image restoration problem. For blind restoration, the local intensity constraints also help to further define the solution, thereby reducing the number of mu...
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
SpringerOpen
2003-01-01
|
| Series: | EURASIP Journal on Advances in Signal Processing |
| Subjects: | |
| Online Access: | http://dx.doi.org/10.1155/S1110865703308066 |
| _version_ | 1811217351081721856 |
|---|---|
| author | Stathaki Tania Katsaggelos Aggelos K May Kaaren L |
| author_facet | Stathaki Tania Katsaggelos Aggelos K May Kaaren L |
| author_sort | Stathaki Tania |
| collection | DOAJ |
| description | <p/> <p>Spatially-adaptive intensity bounds on the image estimate are shown to be an effective means of regularising the ill-posed image restoration problem. For blind restoration, the local intensity constraints also help to further define the solution, thereby reducing the number of multiple solutions and local minima. The bounds are defined in terms of the local statistics of the image estimate and a control parameter which determines the scale of the bounds. Guidelines for choosing this parameter are developed in the context of classical (nonblind) image restoration. The intensity bounds are applied by means of the gradient projection method, and conditions for convergence are derived when the bounds are refined using the current image estimate. Based on this method, a new alternating constrained minimisation approach is proposed for blind image restoration. On the basis of the experimental results provided, it is found that local intensity bounds offer a simple, flexible method of constraining both the nonblind and blind restoration problems.</p> |
| first_indexed | 2024-04-12T06:52:55Z |
| format | Article |
| id | doaj.art-95eed312a64d451c9b87c23461058925 |
| institution | Directory Open Access Journal |
| issn | 1687-6172 1687-6180 |
| language | English |
| last_indexed | 2024-04-12T06:52:55Z |
| publishDate | 2003-01-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | EURASIP Journal on Advances in Signal Processing |
| spelling | doaj.art-95eed312a64d451c9b87c234610589252022-12-22T03:43:15ZengSpringerOpenEURASIP Journal on Advances in Signal Processing1687-61721687-61802003-01-01200312250181Spatially Adaptive Intensity Bounds for Image RestorationStathaki TaniaKatsaggelos Aggelos KMay Kaaren L<p/> <p>Spatially-adaptive intensity bounds on the image estimate are shown to be an effective means of regularising the ill-posed image restoration problem. For blind restoration, the local intensity constraints also help to further define the solution, thereby reducing the number of multiple solutions and local minima. The bounds are defined in terms of the local statistics of the image estimate and a control parameter which determines the scale of the bounds. Guidelines for choosing this parameter are developed in the context of classical (nonblind) image restoration. The intensity bounds are applied by means of the gradient projection method, and conditions for convergence are derived when the bounds are refined using the current image estimate. Based on this method, a new alternating constrained minimisation approach is proposed for blind image restoration. On the basis of the experimental results provided, it is found that local intensity bounds offer a simple, flexible method of constraining both the nonblind and blind restoration problems.</p>http://dx.doi.org/10.1155/S1110865703308066image resolutionblur identificationblind image restorationset-theoretic estimation |
| spellingShingle | Stathaki Tania Katsaggelos Aggelos K May Kaaren L Spatially Adaptive Intensity Bounds for Image Restoration EURASIP Journal on Advances in Signal Processing image resolution blur identification blind image restoration set-theoretic estimation |
| title | Spatially Adaptive Intensity Bounds for Image Restoration |
| title_full | Spatially Adaptive Intensity Bounds for Image Restoration |
| title_fullStr | Spatially Adaptive Intensity Bounds for Image Restoration |
| title_full_unstemmed | Spatially Adaptive Intensity Bounds for Image Restoration |
| title_short | Spatially Adaptive Intensity Bounds for Image Restoration |
| title_sort | spatially adaptive intensity bounds for image restoration |
| topic | image resolution blur identification blind image restoration set-theoretic estimation |
| url | http://dx.doi.org/10.1155/S1110865703308066 |
| work_keys_str_mv | AT stathakitania spatiallyadaptiveintensityboundsforimagerestoration AT katsaggelosaggelosk spatiallyadaptiveintensityboundsforimagerestoration AT maykaarenl spatiallyadaptiveintensityboundsforimagerestoration |