Volume 47 – #14

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Volume 47#14

October 25 – November 7, 2022

The Province of Canada’s 17-cent Jacques Cartier stamp, issued in 1859, features three-dimensional analyses produced by the freeware Gwyddion.

Gwyddion ‘phenomenal’ for philatelists

Since its 2004 launch, the free image data processing program Gwyddion has drawn the attention of philatelists for its powerful ability to uncover some of a stamp’s hidden elements. Czech researchers David Nečas and Petr Klapetek developed the program – free to download on gwyddion.net – which can transform engraved and embossed stamps into three-dimensional images. It uses scanning probe microscopy (SPM), which can determine “surface morphology and other local physical quantities with very high resolution,” the researchers wrote in a 2011 Open Physics study reviewing Gwyddion’s special features. “Its main task is to provide fast and reproducible data-processing routines for SPM users. It allows users to perform all basic operations necessary for a successful evaluation of the data obtained using an SPM,” added Nečas and Klapetek, whose work is supported by the Central European Institute of Technology. Continue reading →

‘Excellent’ exhibits at BNA, national competition
Page 1
Four-stamp ‘truth and reconciliation’ issue features work of Indigenous artists
Page 1
Fun, fellowship at Trajan’s fall 2022 National Show
Page 17

Pick Our Brain
Do you have a collecting question?
Page 4
CSN Marketplace
Are you buying or selling?
Page 20
Show & Bourse
Check out the shows in your area
Page 22
Jesse Robitaille
Philatelic Commentary
Mali’s out-of-work tour guides mail handwritten postcards
Page 4
Ian Robertson
Stamping Grounds
Some stamp issues show collectors the money
Page 6

David Piercey
Philatelic Bookshelf
Specialized book examines rare first-day covers
Page 8
Ian Robertson
Looking Back
Stamps issued a decade ago honour three military regiments
Page 14

Chad Neighbor
Commonwealth Communiqué
Machin stamps far from finished as new chapter starts
Page 16
Robin Harris
New Issues
From around the world
Page 18

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