Conference proceeding
Retinal image mosaicing using the radial distortion correction model
Proceedings of SPIE, Vol.6914(1), pp.691435-691439
Medical Imaging 2008: Image Processing
03/06/2008
DOI: 10.1117/12.773161
Abstract
Fundus camera imaging can be used to examine the retina to detect disorders. Similar to looking through a small keyhole into a large room, imaging the fundus with an ophthalmologic camera allows only a limited view at a time. Thus, the generation of a retinal montage using multiple images has the potential to increase diagnostic accuracy by providing larger field of view. A method of mosaicing multiple retinal images using the radial distortion correction (RADIC) model is proposed in this paper. Our method determines the inter-image connectivity by detecting feature correspondences. The connectivity information is converted to a tree structure that describes the spatial relationships between the reference and target images for pairwise registration. The montage is generated by cascading pairwise registration scheme starting from the anchor image downward through the connectivity tree hierarchy. The RADIC model corrects the radial distortion that is due to the spherical-to-planar projection during retinal imaging. Therefore, after radial distortion correction, individual images can be properly mapped onto a montage space by a linear geometric transformation, e.g. affine transform. Compared to the most existing montaging methods, our method is unique in that only a single registration per image is required because of the distortion correction property of RADIC model. As a final step, distance-weighted intensity blending is employed to correct the inter-image differences in illumination encountered when forming the montage. Visual inspection of the experimental results using three mosaicing cases shows our method can produce satisfactory montages.
Details
- Title: Subtitle
- Retinal image mosaicing using the radial distortion correction model
- Creators
- Sangyeol Lee - The Univ. of IowaMichael D Abràmoff - The Univ. of Iowa and Veteren's Administration Medical CtrJoseph M Reinhardt - The Univ. of Iowa
- Resource Type
- Conference proceeding
- Publication Details
- Proceedings of SPIE, Vol.6914(1), pp.691435-691439
- Conference
- Medical Imaging 2008: Image Processing
- DOI
- 10.1117/12.773161
- ISSN
- 0277-786X
- Language
- English
- Date published
- 03/06/2008
- Academic Unit
- Electrical and Computer Engineering; Roy J. Carver Department of Biomedical Engineering; Ophthalmology and Visual Sciences; Radiology; Fraternal Order of Eagles Diabetes Research Center
- Record Identifier
- 9984060868802771
Metrics
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