| Title | Preliminary Experiment of Simple Field Spectroscopy by Using Filtered Commercial Digital Camera |
|---|---|
| Authors | Isao Takashima, Myint Soe, Daizo Ishiyama and Krit Won-In |
| Year | 2008 |
| Conference | Asian Geothermal Symposium |
| Keywords | Remote sensing, alteration mineral, spectral analysis, CCD camera, filtered image |
| Abstract | New digital filter photography remote sensing method is a good technique for detecting signs of alteration. CCD camera filter photo reflectance spectrum of iron oxide showed absorption in 450 nm and higher reflectance in 550 nm and 650 nm, and Hydroxyl alteration showed absorption in 600 nm and reflectance in 650 nm and 750 nm. This proposed analytical method can be applied to all types of digital filter CCD camera images, such as hand specimens and field outcrop photograph. The resolution of graphic analysis is very high because of the large number of pixels analysed are more than 1 million. Images used in an analysis of color should be either RAW or TIFF files and not JPEGs. The Spectral Angle Mapper (SAM) technique can be used for analysis. It has a great potential to aid many fields of survey. |