The analysis of planetary satellites or asteroids ground based observations is quite similar. Our first goal was to improve the astrometric reduction for digitized photographic plates in case of too few reference stars and to propose solutions. We here present astrometric techniques used for old observations of the Galilean satellites made with the 26-inch refractor of USNO in Washington DC fro...

purpose: to evaluate the agreement between a new method for quantitative analysis of fundus or angiographic images using photoshop software and clinical judgment. methods: four hundred eighteen fundus and angiographic images of diabetic patients were evaluated by three retina specialists and then by computer using photoshop 7.0 software. four variables were selected for comparison: amount of ha...

BACKGROUND Both calliper devices and digital photographic methods have been used to quantify foot arch height parameters. The purpose of this study was to compare the reliability of both a calliper device and digital photographic method in determining the arch height index (AHI). METHODS Twenty subjects underwent measurements of AHI on two separate days. On each day, AHI measurements during b...

Lith Printing is a photographic technique that overexposes negatives onto special purpose paper. Lith prints are becoming increasing popular because their visual appearance is considered to be: “Beautiful, different and personal. Its flexibility offers almost limitless ways of interpreting a negative” [TR98]. But, there are various problems associated with lith printing. It is difficult to dupl...