| 1. Identity statement | |
| Reference Type | Conference Paper (Conference Proceedings) |
| Site | sibgrapi.sid.inpe.br |
| Holder Code | ibi 8JMKD3MGPEW34M/46T9EHH |
| Identifier | 6qtX3pFwXQZeBBx/w5u9t |
| Repository | sid.inpe.br/banon/2002/11.06.11.27 |
| Last Update | 2002:11.06.02.00.00 (UTC) administrator |
| Metadata Repository | sid.inpe.br/banon/2002/11.06.11.27.14 |
| Metadata Last Update | 2022:06.14.00.12.08 (UTC) administrator |
| DOI | 10.1109/SIBGRA.2000.883910 |
| Citation Key | RangayyanFerrDesaFrèr:2000:DiAnIm |
| Title | Directional analysis of images with Gabor wavelets  |
| Year | 2000 |
| Access Date | 2024, May 04 |
| Number of Files | 1 |
| Size | 962 KiB |
| 2. Context | |
| Author | 1 Rangayyan, R. M. 2 Ferrari, R. J. 3 Desautels, J. E. L. 4 Frère, A. F. |
| Editor | Carvalho, Paulo Cezar Pinto Walter, Marcelo |
| Conference Name | Brazilian Symposium on Computer Graphics and Image Processing, 13 (SIBGRAPI) |
| Conference Location | Gramado, RS, Brazil |
| Date | 17-20 Oct. 2000 |
| Publisher | IEEE Computer Society |
| Publisher City | Los Alamitos |
| Pages | 170-177 |
| Book Title | Proceedings |
| Tertiary Type | Full Paper |
| Organization | SBC - Brazilian Computer Society |
| History (UTC) | 2008-07-17 14:10:50 :: administrator -> banon :: 2008-08-26 15:23:01 :: banon -> administrator :: 2009-08-13 20:36:56 :: administrator -> banon :: 2010-08-28 20:00:09 :: banon -> administrator :: 2022-06-14 00:12:08 :: administrator -> :: 2000 |
| 3. Content and structure | |
| Is the master or a copy? | is the master |
| Content Stage | completed |
| Transferable | 1 |
| Version Type | finaldraft |
| Keywords | wavelet transforms linear directional component analysis images multiresolution representation Gabor wavelets Gabor filter dictionary tuning frequency orientation redundancy reduction filter responses Karhunen-Loeve transform thresholding principal components Rose diagrams phase images oriented patterns mammogram asymmetry feature extraction parametric statistical classifier distortion cases Mini-MIAS database leave-one-out methodology diagnostic accuracy |
| Abstract | The paper presents a new scheme for analysis of linear directional components in images by using a multiresolution representation based on Gabor wavelets. A dictionary of Gabor filters with varying tuning frequency and orientation, specifically designed in order to reduce the redundancy in the wavelet-based representation, is applied to the given image. The filter responses for different scales and orientation are analyzed by using the Karhunen-Loeve (KL) transform and Otsu's (1979) method of thresholding. The KL transform is applied to select the principal components of the filter responses, preserving only the most relevant directional elements appearing at all scales. The first N principal components, thresholded by using Otsu's method, are used to reconstruct the magnitude and phase of the directional components of the image. Rose diagrams computed from the phase images are used for quantitative and qualitativeanalysis of the oriented patterns. The proposed scheme is applied to the analysis of asymmetry between left and right mammograms. For this purpose, a set of three features is extracted from the Rose diagrams and used in a parametric statistical classifier. A total of 80 images from 20 normal cases, 14 asymmetric cases, and 6 distortion cases from the Mini-MIAS database were used to evaluate the scheme using the leave-one-out methodology, resulting in an average diagnostic accuracy of 72.5%. |
| Arrangement 1 | urlib.net > SDLA > Fonds > SIBGRAPI 2000 > Directional analysis of... |
| Arrangement 2 | urlib.net > SDLA > Fonds > Full Index > Directional analysis of... |
| doc Directory Content | access |
| source Directory Content | there are no files |
| agreement Directory Content | there are no files |
| 4. Conditions of access and use | |
| data URL | http://urlib.net/ibi/6qtX3pFwXQZeBBx/w5u9t |
| zipped data URL | http://urlib.net/zip/6qtX3pFwXQZeBBx/w5u9t |
| Target File | 170-177.pdf |
| User Group | administrator |
| Visibility | shown |
| 5. Allied materials | |
| Next Higher Units | 8JMKD3MGPEW34M/46PN6AP 8JMKD3MGPEW34M/4742MCS |
| Citing Item List | sid.inpe.br/sibgrapi/2022/04.27.03.08 7 |
| Host Collection | sid.inpe.br/banon/2001/03.30.15.38 |
| 6. Notes | |
| Notes | The conference was held in Gramado, RS, Brazil, from October 17 to 20. |
| Empty Fields | affiliation archivingpolicy archivist area callnumber contenttype copyholder copyright creatorhistory descriptionlevel dissemination documentstage e-mailaddress edition electronicmailaddress format group isbn issn label language lineage mark mirrorrepository nextedition numberofvolumes orcid parameterlist parentrepositories previousedition previouslowerunit progress project readergroup readpermission resumeid rightsholder schedulinginformation secondarydate secondarykey secondarymark secondarytype serieseditor session shorttitle sponsor subject tertiarymark type url volume |