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Seal Digitisation with Reflectance Transformation Imaging (RTI)Cologne Center for eHumanities | Stephan Makowski | 13.10.2016
AgendaIntroduction RTITechnical DesignExamplesByzantine SealsOther techniques (3D)Archival relevance Beyond Digitisation
Cologne Center for eHumanities | Stephan Makowski | 13.10.2016
Introduction RTITechnical DesignExamplesByzantine SealsOther techniques (3D)Archival relevance Beyond Digitisation
Cologne Center for eHumanities | Stephan Makowski | 13.10.2016
Introduction RTITechnical DesignExamplesByzantine SealsOther techniques (3D)Archival relevance Beyond Digitisation
Cologne Center for eHumanities | Stephan Makowski | 13.10.2016
Introduction Reflectance Transformation Imaging (RTI)Origins from HP Labs (2001)Technique based on Polynomial Texture Mapping (PTM)Currently developed by Cultural Heritage Imaging
Cologne Center for eHumanities | Stephan Makowski | 13.10.2016
Introduction Reflectance Transformation Imaging (RTI)Advantages:H-RTI is a non-invasive and non-contact recording method, and therefore protects the heritage resource being recorded.Cost effectivetransportable
Source: Sarah M. Duffy: Multi-light Imaging for Heritage Applications, English Heritage, 2013, p.3.
Cologne Center for eHumanities | Stephan Makowski | 13.10.2016
Introduction Reflectance Transformation Imaging (RTI)Disadvantages:Quality relies on the captured imagesMax. size 2m diameterGives just information about surface; not underlying materials
Source: Sarah M. Duffy: Multi-light Imaging for Heritage Applications, English Heritage, 2013, p.3.
Cologne Center for eHumanities | Stephan Makowski | 13.10.2016
Introduction RTITechnical DesignExamplesByzantine SealsOther techniques (3D)Archival relevance Beyond Digitisation
Cologne Center for eHumanities | Stephan Makowski | 13.10.2016
Introduction RTITechnical DesignExamplesByzantine SealsOther techniques (3D)Archival relevance Beyond Digitisation
Cologne Center for eHumanities | Stephan Makowski | 13.10.2016
Source: Sarah M. Duffy: Multi-light Imaging for Heritage Applications, English Heritage, 2013, p.4.
Cologne Center for eHumanities | Stephan Makowski | 13.10.2016
Source: Sarah M. Duffy: Multi-light Imaging for Heritage Applications, English Heritage, 2013, p.6.1) Camera2) Souce of Light3) Archival Material, etc4) Light Identifier
Cologne Center for eHumanities | Stephan Makowski | 13.10.2016
Source: Sarah M. Duffy: Multi-light Imaging for Heritage Applications, English Heritage, 2013, p.11.
Lightangle
Cologne Center for eHumanities | Stephan Makowski | 13.10.2016
To DoGet / Build EquipmentMake pictures (jpeg) from any desired lightanglesMake RTI File (ptm) with RTI Builder (free and online available)View with RTI Viewer (Software or webplugin; free and online availale)
Cologne Center for eHumanities | Stephan Makowski | 13.10.2016
Introduction RTITechnical DesignExamplesByzantine SealsOther techniques (3D)Archival relevance Beyond Digitisation
Cologne Center for eHumanities | Stephan Makowski | 13.10.2016
Introduction RTITechnical DesignExamplesByzantine SealsOther techniques (3D)Archival relevance Beyond Digitisation
Cologne Center for eHumanities | Stephan Makowski | 13.10.2016
Cologne Center for eHumanities | Stephan Makowski | 13.10.2016
Cologne Center for eHumanities | Stephan Makowski | 13.10.2016
Cologne Center for eHumanities | Stephan Makowski | 13.10.2016
Cologne Center for eHumanities | Stephan Makowski | 13.10.2016
Souce: http://culturalheritageimaging.org/Technologies/RTI/
Cologne Center for eHumanities | Stephan Makowski | 13.10.2016
Souce: http://culturalheritageimaging.org/Technologies/RTI/
Cologne Center for eHumanities | Stephan Makowski | 13.10.2016
Introduction RTITechnical DesignExamplesByzantine SealsOther techniques (3D)Archival relevance Beyond Digitisation
Cologne Center for eHumanities | Stephan Makowski | 13.10.2016
Introduction RTITechnical DesignExamplesByzantine SealsOther techniques (3D)Archival relevance Beyond Digitisation
Cologne Center for eHumanities | Stephan Makowski | 13.10.2016
Other techniques3D-Method:Advantage:reproduce seals with 3D-modellsinteractive modell (turnable)
Disadvantage:Slower then RTIMore expensive
Cologne Center for eHumanities | Stephan Makowski | 13.10.2016
Souce: 2016, Steadpro
Cologne Center for eHumanities | Stephan Makowski | 13.10.2016
https://sketchfab.com/models/5e96a37616854991873c0a453527e743https://sketchfab.com/models/eabf12338dba42aea69b388eae80e305Examples
Cologne Center for eHumanities | Stephan Makowski | 13.10.2016
Introduction RTITechnical DesignExamplesByzantine SealsOther techniques (3D)Archival relevance Beyond Digitisation
Cologne Center for eHumanities | Stephan Makowski | 13.10.2016
Introduction RTITechnical DesignExamplesByzantine SealsOther techniques (3D)Archival relevance Beyond Digitisation
Cologne Center for eHumanities | Stephan Makowski | 13.10.2016
Archival RelevancePreservation:Seals dont have to be shown to the audienceMaking RTI-images doesnt harm the seals (light, heat, etc.)
Audience:Attract scientifics and others to work with online available images
Cologne Center for eHumanities | Stephan Makowski | 13.10.2016
Introduction RTITechnical DesignExamplesByzantine SealsOther techniques (3D)Archival relevance Beyond Digitisation
Cologne Center for eHumanities | Stephan Makowski | 13.10.2016
Introduction RTITechnical DesignExamplesByzantine SealsOther techniques (3D)Archival relevance Beyond Digitisation
Cologne Center for eHumanities | Stephan Makowski | 13.10.2016
Beyond DigitisationEncoding of Seals in Digital HumanitiesDescription of SealsMetadataUsable and Searchable for others!
SigiDoc (derived from EpiDoc)
Cologne Center for eHumanities | Stephan Makowski | 13.10.2016
Thank you very much!Stephan Makowski, [email protected]: +49-221-470-4052http://www.cceh.uni-koeln.deLinks:http://culturalheritageimaging.org/Technologies/RTI/
Software:http://culturalheritageimaging.org/What_We_Offer/Downloads/
Cologne Center for eHumanities | Stephan Makowski | 13.10.2016
www.steadpro.com