Girona: Digitization systems and procedures in photographic image archives
Spain
22-23 May 2012 - Europeana Photography Workshops
The workshop aims to provide an overview of the available systems for original photographic materials digitization as well as the procedures in order to obtain the best results in terms of image quality and fidelity to the original.
TEACHERS
- Carles Mitjà. Teacher of Image Technology at Centre de la Imatge I la Tecnologia Multimèdia (CITM), Universitat Politècnica de Catalunya (UPC). Coordinator of the Image Quality Laboratory at CITM/UPC.
- Bea Martínez. Teacher of Colour Management at Centre de la Imatge I la Tecnologia Multimèdia (CITM), Universitat Politècnica de Catalunya (UPC).
VENUE
Centre de Recerca i Difusió de la Imatge (CRDI). Placeta Institut Vell, 1. Girona.
PROGRAMME
Tuesday 22 May. CRDI, Girona
9:00 Welcome by CRDI Director
9:15 Start workshop
10.30 Coffee break
11.00 Continuation Workshop
13:00 Lunch
14:00 Continuation Workshop
16.15 Coffee break
16:30 Continuation Workshop
18:00 Closing
18:30 Visit to Cinema Museum
21:00 Social dinner
Wednesday 23 May. CRDI, Girona
9.00 Start workshop
11.00 Coffee break
11.20 Continuation Workshop
13:00 Lunch
14:00 Continuation Workshop
16:00 End of workshop
WORKSHOP SYLLABUS
1. Basics of digital images
1.1. File vs image
1.2. Digital image coordinates
1.3. Spatial resolution
1.4. Chromatic resolution
1.5. Digital image visualization
1.6. Image data extraction
2. Digitization
2.1. Continuous and discrete spaces
2.2. Digitizing with scanner
2.3. Digitizing with camera
2.4. Properties of digitization with scanner
2.5. Properties of digitization with camera
3. Digital image quality
3.1. Image aberrations
3.2. Light diffraction
3.3. Lens resolving power (RP)
3.4. The Modulation Transfer Function (MTF)
3.5. The Signal to Noise ratio (SNR)
3.6. The Opto Electronic Conversion Function (OECF)
4. Cameras for digitization
4.1. Optical components
4.2. Electronic Components
4.3. File formats: raw vs TIFF and JPEG
4.4. Camera settings
5. Lighting the original
5.1. Lighting instruments
5.2. Lighting and the original
5.3. Lighting and the digital image
5.4. Translucent originals: transmission lighting
5.5. Flat opaque originals: uniform reflected lighting
5.6. Textured opaque originals: directional reflected lighting
6. Image processing
6.1. Basics of image processing tools
6.2. Spatial and frequency spaces
6.3. Processing over data extraction
6.4. Treatment of noise
6.5. Treatment of edges visibility
6.6. File versions generation
7. Displaying digital images
7.1. Display systems
7.2. Display pixels
7.3. Output Resolutions
7.4. Displaying and user influence
8. Colour Management
8.1. Colour reproduction in digital images
8.2. Device dependent colour spaces: RGB and CMY
8.3. Device independent colour spaces: CIE-Lab and CIE-xyY
8.4. ICC Profiles: creation and application
8.5. Standard ICC Profiles
8.6. Colour calibration of RAW images
8.7. Colour Management tools: Assigning vs Converting
8.8. Colour Management in digital imaging workflow
References
- Allen, E. and Triantaphillidou, S. (2011) The Manual of Photography. Focal Press, Oxford.
Bayer, B. (1976) Color Imaging Array, U.S. Patent Nº 3,971,065. Eastman Kodak Company, Rochester, USA. - Boreman, Glenn D. (2001) Modulation Transfer Function in Optical and Electro-Optical Systems. SPIE Press. Bellingham, Washington, USA.
- Chung, King-Hong and Chan, Yuk-Hee (2005) Color Demosaicing Using Variance of Color Differences. IEEE Transactions on Volume 15, Issue 10, Oct. 2006 Page(s):2944 - 2955.
- Davies, A. and Fennessy, P. (1996) Electronic Imaging for Photographers. Focal Press, Oxford.
Fiete, Robert D. (2010) Modelling the Imaging Chain of Digital Cameras. SPIE Press, Bellingham, WA. - Glyn, Earl F. USAF 1951 and Microcopy Resolution Test Charts. efg's, Tech. Note. [on line] Página web, http://www.efg2.com/Lab/ImageProcessing/TestTargets/ [last view 31/08/09].
- Gonzalez, R. C. and Woods, R. E. (2002) Digital Image Processing. Prentice Hall, Upper Saddle River, NJ.
- Holst, Gerald C. (2007) CMOS/CCD Sensors and Camera Systems. SPIE Press, Bellingham, WA.
- ISO / TC42N 4230 (1997) Electronic Still Picture Imaging. Spatial Frequency Response (SFR) Measurements. International Organisation for Standarisation.
- Mitjà, C., Escofet, J., Bover, T., Measuring image quality performance on image versions saved with different file format and compression ratio in Optics, Photonics, and Digital Technologies for Multimedia Applications II, edited by Peter Schelkens, Touradj Ebrahimi, Gabriel Cristóbal, Frédéric Truchetet, Pasi Saarikko, Proceedings of SPIE Vol. 8436 (SPIE, Bellingham, WA 2012) 843617.
- Mitjà, C., Escofet, J., Vega, F., Relationships Between Lens Performance and Different Sensor Sizes in Professional Photographic Still SLR Cameras in Current Developments in Lens Design and Optical Engineering X, edited by Pantazis Z. Mouroulis, R. Barry Johnson, Virendra N. Mahajan, Proceedings of SPIE Vol. 7428 (SPIE, Bellingham, WA 2009) 74280P.
- Mitjà, Carles and Martínez, Bea (2007) Digitalización de Imágenes Fotográficas Impresas. 3er Congreso de Historia de la Fotografía. Photomuseum. Zarautz, Gipuzkoa.
- Mitjà, Carles and Martínez, Bea. (2008) Digitalització de Material Fotogràfic Imprés,10enes Jornades Antoni Varés Imatge i Recerca. CRDI, Girona.
- Ray, Sidney F. (1997) Applied Photographic Optics. Focal Press, Oxford.
- Russ, John C. (2002) The Image Processing Handbook. CRC Press, Boca Raton, FA. Tverdokhleb, Andrey. Raw Photo Processor. [on line] Página web, URL http://www.raw-photo-processor.com/RPP/Overview.html [last view 31/08/09]
- Williams, Don and Burns, Peter D. (2001) Diagnostics for Digital Capture Using MTF. Eastman Kodak Company. Rochester. PICS2001, Montreal (227-232).
- Williams, John B. (1990) Image Clarity, High-Resolution Photography. Focal Press. Boston, London, USA-UK.
- Zapryanov, G. and Nikalova, I. (2008) Comparative Study of Demosaicing Algorithms for Bayer and Pseudo-Random Bayer Color Filter Arrays. International Scientific Conference Computer Science ‘2008.