| 1. Identity statement | |
| Reference Type | Conference Paper (Conference Proceedings) |
| Site | marte2.sid.inpe.br |
| Holder Code | isadg {BR SPINPE} ibi 8JMKD3MGPCW/3DT298S |
| Identifier | 8JMKD3MGP6W34M/3JM4C2F |
| Repository | sid.inpe.br/marte2/2015/06.15.15.30.49 |
| Last Update | 2015:06.15.15.30.49 (UTC) banon |
| Metadata Repository | sid.inpe.br/marte2/2015/06.15.15.30.50 |
| Metadata Last Update | 2018:06.06.03.22.12 (UTC) administrator |
| ISBN | 978-85-17-0076-8 |
| Label | 729 |
| Citation Key | AzevedoTachSilv:2015:AvReEf |
| Title | Avaliação da redução do efeito de sombreamento em imagens multiespectrais de áreas urbanas utilizando componentes principais e análise de agrupamento  |
| Format | Internet |
| Year | 2015 |
| Access Date | 2024, Apr. 28 |
| Secondary Type | PRE CN |
| Number of Files | 1 |
| Size | 1302 KiB |
| 2. Context | |
| Author | 1 Azevedo, Samara Calçado de 2 Tachibana, Vilma Mayumi 3 Silva, Erivaldo Antônio da |
| Author e-Mail Address | 1 samara_calcado@hotmail.com |
| Editor | Gherardi, Douglas Francisco Marcolino Aragão, Luiz Eduardo Oliveira e Cruz de |
| e-Mail Address | wanderf@dsr.inpe.br |
| Conference Name | Simpósio Brasileiro de Sensoriamento Remoto, 17 (SBSR) |
| Conference Location | João Pessoa |
| Date | 25-29 abr. 2015 |
| Publisher | Instituto Nacional de Pesquisas Espaciais (INPE) |
| Publisher City | São José dos Campos |
| Pages | 3707-3714 |
| Book Title | Anais |
| Organization | Instituto Nacional de Pesquisas Espaciais (INPE) |
| History (UTC) | 2015-06-15 15:30:50 :: banon -> administrator :: 2018-06-06 03:22:12 :: administrator -> banon :: 2015 |
| 3. Content and structure | |
| Is the master or a copy? | is the master |
| Content Stage | completed |
| Transferable | 1 |
| Abstract | Shadows represent a problem for feature extraction in urban areas, mainly when dealing with high spatial resolution remote sensing images. This work aims to evaluate one proposed method to remove shadow effects in multispectral images. Two approaches have been followed and compared. First, each band was corrected individually and principal components analysis (PCA) used to reduce high correlation that exists among images and the quantity to be processed. In the second approach, the PCA was firstly applied and corrected after, in order to verify the correction behavior in transformed data. To alleviate the shadow effects, priori detection of shadow areas using black top-hat morphological operator and automatic binarization were done, and then, these areas were corrected by local histogram matching from neighborhoods statistics. The method was tested in WorldView-2 multispectral images from São Paulo city, which is one of the densest urban areas in the world. Experimental results and visual analysis have shown a decrease in radiometric differences caused by shadows in both approaches. Also, an increase on distinction between features that were occluded was observed and proven by unsupervised classification using k-media. However, further analysis and references data are necessary to guarantee that the radiometric value encountered corresponds that associated land cover. This study can contribute in the future with many applications such as 3D reconstruction, image matching, object recognition, etc. |
| Area | SRE |
| Type | Processamento de imagens |
| Arrangement 1 | urlib.net > BDMCI > Fonds > SBSR > SBSR 17 > Avaliação da redução... |
| Arrangement 2 | urlib.net > BDMCI > Fonds > Produção anterior à 2021 > DIDSR > SBSR 17 > Avaliação da redução... |
| Arrangement 3 | Projeto Memória 60... > Livros e livros editados > SBSR 17 > Avaliação da redução... |
| 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://marte2.sid.inpe.br/ibi/8JMKD3MGP6W34M/3JM4C2F |
| zipped data URL | http://marte2.sid.inpe.br/zip/8JMKD3MGP6W34M/3JM4C2F |
| Language | pt |
| Target File | p0729.pdf |
| User Group | banon |
| Visibility | shown |
| 5. Allied materials | |
| Mirror Repository | urlib.net/www/2011/03.29.20.55 |
| Next Higher Units | 8JMKD3MGP6W34M/3JJLLP2 |
| Citing Item List | sid.inpe.br/marte2/2015/05.31.21.54 4 |
| Host Collection | dpi.inpe.br/marte2/2013/05.17.15.03.06 |
| 6. Notes | |
| Empty Fields | affiliation archivingpolicy archivist callnumber contenttype copyholder copyright creatorhistory descriptionlevel dissemination documentstage doi edition group issn keywords lineage mark nextedition notes numberofvolumes orcid parameterlist parentrepositories previousedition previouslowerunit progress project readergroup readpermission resumeid rightsholder schedulinginformation secondarydate secondarykey secondarymark serieseditor session shorttitle sponsor subject tertiarymark tertiarytype url versiontype volume |
| 7. Description control | |
| e-Mail (login) | banon |
| update | |