The counterfeiter was killed in a shootout with US Marshals in May 2018.
Monday, February 04, 2019
Friday, January 25, 2019
https://youtu.be/KDR5W7zJzMk. 70 minutes.
Monday, January 07, 2019
1923 wasn't a stellar year. The works are mostly auction catalogs. Included is Henry Chapman’s Ancient and modern foreign and American gold coins collected by the late Enrico Caruso, the sales catalog of the opera singer's coin collection.
No illustrations. This is the copy from the American Numismatic Society library. The catalog is 'priced' (sale prices recorded in the margins).
Tuesday, October 30, 2018
Briefly noted: An 8-year-old paper by Eleni Drakaki, Andreas Karydas, et al: “Evaluation of laser cleaning of ancient Greek, Roman and Byzantine coins”. Successful results are claimed, sometimes in conjunction with mechanical cleaning.
The article is a followup to an earlier paper, “Laser cleaning on Roman coins”. The image for this post comes from the first paper.
Monday, October 01, 2018
Monday, September 24, 2018
“Three-dimensional reconstruction of Roman coins from photometric image sets”, a 2017 Journal of Electronic Imaging paper by Lindsay MacDonald, Vera Moitinho de Almeida, and Mona Hess.
The present study combined two datasets representing the surface topography of the two Faustina coins (Fig. 1). First, they were scanned by a 3-D color laser scanner, producing a point cloud of the surface shape. Second, they were photographed in an illumination dome with directional lighting. The two representations were combined to produce a digital elevation map (DEM) of each coin with the accuracy of the scanner and the fine detail of the photography.
Tuesday, September 18, 2018
I calculate that $200,000,000 in $20 bills would weight 10 tons and would completely fill a 12' moving van.