| 1. Identity statement | |
| Reference Type | Conference Paper (Conference Proceedings) |
| Site | sibgrapi.sid.inpe.br |
| Holder Code | ibi 8JMKD3MGPEW34M/46T9EHH |
| Identifier | 6qtX3pFwXQZeBBx/w4kh2 |
| Repository | sid.inpe.br/banon/2002/11.04.11.11 |
| Last Update | 2002:11.04.02.00.00 (UTC) administrator |
| Metadata Repository | sid.inpe.br/banon/2002/11.04.11.11.14 |
| Metadata Last Update | 2022:06.14.00.11.58 (UTC) administrator |
| DOI | 10.1109/SIBGRA.2000.883887 |
| Citation Key | Torrećo:2000:ShShIn |
| Title | Shape from shading and intensity gradient  |
| Year | 2000 |
| Access Date | 2024, May 04 |
| Number of Files | 1 |
| Size | 689 KiB |
| 2. Context | |
| Author | Torrećo, José R. A. |
| 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 |
| Book Title | Proceedings |
| Tertiary Type | Full Paper |
| Organization | SBC - Brazilian Computer Society |
| History (UTC) | 2008-07-17 14:10:48 :: administrator -> banon :: 2008-08-26 15:23:00 :: banon -> administrator :: 2009-08-13 20:36:49 :: administrator -> banon :: 2010-08-28 20:00:08 :: banon -> administrator :: 2022-06-14 00:11:58 :: administrator -> :: 2000 |
| 3. Content and structure | |
| Is the master or a copy? | is the master |
| Content Stage | completed |
| Transferable | 1 |
| Version Type | finaldraft |
| Keywords | computer vision shape from shading intensity gradient shape estimation brightness gradient Green function approach shape-from-shading GSFS single brightness image uniform disparity field matching image linear expansion reflectance map surface gradient closed-form depth map free parameters parameter estimation depth estimate higher-frequency components imaged surface real images computer vision technique |
| Abstract | We present a novel algorithm for shape estimation, using both brightness and brightness gradient as input data. Our algorithm is an improvement of the recently introduced Green's function approach to shape-from-shading (GSFS). In GSFS, we assume that the single brightness image will be matched to a second image through a uniform disparity field, and solve for the matching image via Green's function. When a linear expansion of the reflectance map is considered, the matching image can be related to surface gradient, leading to a closed-form depth map whose free parameters are easily estimated. The author shows that the same procedure can be repeated with the gradient image as input; a second depth estimate thus results which takes into account higher-frequency components of the imaged surface. Extensive experimentation with synthetic and real images corroborates the advantage of the new method. |
| Arrangement 1 | urlib.net > SDLA > Fonds > SIBGRAPI 2000 > Shape from shading... |
| Arrangement 2 | urlib.net > SDLA > Fonds > Full Index > Shape from shading... |
| 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/w4kh2 |
| zipped data URL | http://urlib.net/zip/6qtX3pFwXQZeBBx/w4kh2 |
| Target File | 7-14.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 6 |
| 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 pages parameterlist parentrepositories previousedition previouslowerunit progress project readergroup readpermission resumeid rightsholder schedulinginformation secondarydate secondarykey secondarymark secondarytype serieseditor session shorttitle sponsor subject tertiarymark type url volume |