The picture of the background is Mt. Miwayama

1. Asia-Pacific Advanced Network 20th APAN Meeting: Advanced Network Conference in Taipei Near Infrared Digital Images of Historical Resources of the Nara Region April 24th 2005 Nara Women’s University Library Katsuya Watari and Saori Donkai Katsuya Watari and Saori Donkai The picture of the background is Mt. Miwayama

2. Gangouji Gokurakubou engi emaki（元興寺極楽坊縁起絵巻） Miwayama engi（三輪山縁起） Ikomayama Houzanji engi（生駒山宝山寺縁起） Digital Archives of Nara Women’s University Library

3. What is the Chikou Mandala? • One of the Important Cultural Property in Japan • 2. A historical heritage of folk beliefs in medieval times 3. In the Gangouji Temple (元興寺） in Nara 4. Originally Created 1200 years ago 5. Drawn Gokuraku Joudo 　（極楽浄土） = Amida’s Pure Land Gangouji Temple

4. Research in 1960’s on the Chikou Mandala • Repaired with the purpose of preventing the abruption of the pigments and getting rid of the dirt. • Photographed in wet condition. • X-ray photographs • Fluorescent X-ray analysis of • the pigments

5. Basis of the Chikou Mandala 217cm 195cm

6. Basecoat of the Chikou Mandala Vermillion Black Japanese lacquer Gold paint Sumi ink Green Polishing powder Yellow ocher Linen cloth Japanese lacquer Cypress board Iron nail

7. Pigments and the chemical name

8. Infrared wavelength region

9. Near-infrared absorption spectrum • By the overtone or combination tone of stretching and bending vibrations of interatomic bond in infrared range. • Absorption intensity is lower. ↓ Suit for nondestructive inspection

10. Image formation by near-infrared reflection and absorption restore an image

11. Digital Still Cameras • Store images digitally • CCD（Charge-coupled device） → Sensitive to near-infrared light • LCD screen → Preview the resulting image in real-time

12. HORIUCHI COLOR LTD. • A Professional Photo-processing laboratory in Japan • Launched a division specializing in digital archiving in 1999 http://www.horiuchi-color.co.jp/

13. iPallet / Lime • Image Viewing Software • Compared and synchronized viewing between two huge images. • Developed as a web plug-in version of iPalletnexus. • Jointly developed by the University of Tokyo, Horiuchi Color and iPallet

14. Demonstration • Portal of the digital archives • Chikou Mandala • Normal • Near-infrared • Comparing two images • Glass view

15. Benefit from the near-infrared images To identify the term of the creation Arched eyebrow Almond eye Ample cheek

16. Digital Archives of the Nara Women’s University • Visualization by near-infrared light • Preservation of cultural properties • High-quality presentation • Advancement of the accessibility • Coordination with the local community • Supporting research

17. Image Database of Historical Resources Image Database of Historical Resources of of the Nara Region the Nara Region Uniform Resource Locator Nara Women’s University Library http://lib.nara-wu.ac.jp/ Image Database of Historical Resources of the Nara Region http://mahoroba.lib.nara-wu.ac.jp/ Nara Women’s University Library Nara Women’s University Library