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multispectral

Ultraviolet RTI

A painted and incised ceramic vessel was used as case study in an attempt to evaluate the efficiency of Reflected UV (UVR) RTI and UV induced visible fluorescence (UVF) RTI. The Highlight RTI data capture took place at the archaeological imaging laboratory of the University of Southampton, using a UV-VIS-IR modified DSLR camera, adequate filters and lighting. The reflected UV-RTI datasets were captured with a UV transmitter and an IR barrier filter. Continue reading →

Icons RTI case study

Icons: Production  techniques and examination methodology Icon or ikon from Greek eikƍn is a representation of a sacred or sanctified Christian personage used in religious worship in the Russian or Greek Orthodox Church. The production of icons has been described by the monk Dionisios ek Fourna in 1728-1733. Icons are typically painted on a wooden panel with the egg tempera painting technique, over a layer of gypsum and glue (preparation layer). Continue reading →

Infrared RTI

Last night i took the artwork from my wall and did my first infrared RTI. I would say it is even more exiting than normal RTI as you will see things you are not able to see with naked eye. Artwork I was taking photos of was not maybe the best to show the potential of IR RTI but I hope to try it it again with bigger light-source (I used converted Maglite Mini) and more challenging art-piece. Click on image to switch in between normal photo and IR RTI with specular enhancement filter. Continue reading →

Multispectral world

Last weekend I spend some time with ACRG multispectral camera (converted Nikon D700). I got Hoya R72 infrared filter and walked on the fields of Western Estonia. I am very happy with results (see below). When it became dark outside I took the soldering iron and made two-led IR torch. This will be used for RTI testing later this week. One thing I found out already, you need quite long exposure time for a sharp image or/and much brighter light source. Continue reading →