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 →
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Features
‘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
Regulars
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Page 20
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Check out the shows in your area
Page 22
Columns
![By Jesse Robitaille Jesse Robitaille](https://canadianstampnews.com/wp-content/uploads/sites/3/2019/09/JesseRobitaille_BW-210x210.jpg)
Philatelic Commentary
Mali’s out-of-work tour guides mail handwritten postcards
Page 4
![By Ian Robertson Ian Robertson](https://canadianstampnews.com/wp-content/uploads/sites/3/2014/09/IanRobertsonBW-210x210.jpg)
Stamping Grounds
Some stamp issues show collectors the money
Page 6
![By David Piercey David Piercey](https://canadianstampnews.com/wp-content/uploads/sites/3/2019/07/DavidPierceyBW-210x210.jpg)
Philatelic Bookshelf
Specialized book examines rare first-day covers
Page 8
![By Ian Robertson Ian Robertson](https://canadianstampnews.com/wp-content/uploads/sites/3/2014/09/IanRobertsonBW-210x210.jpg)
Looking Back
Stamps issued a decade ago honour three military regiments
Page 14
![By Chad Neighbor Chad Neighbor](https://canadianstampnews.com/wp-content/uploads/sites/3/2019/09/ChadNeighborBW-210x210.jpg)
Commonwealth Communiqué
Machin stamps far from finished as new chapter starts
Page 16
![By Robin Harris Robin Harris](https://canadianstampnews.com/wp-content/themes/trajan/img/default-avatar-01.png)
New Issues
From around the world
Page 18
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