On Line Digital Image Analysis and Processing in HREM

1982 ◽  
Vol 40 ◽  
pp. 740-741
Author(s):  
E. D. Boyesa ◽  
B. J. Muggridgea ◽  
M. J. Goringe
Keyword(s):  
Image Analysis ◽  
High Resolution ◽  
Digital Image ◽  
Digital Image Analysis ◽  
Theoretical Models ◽  
Specimen Thickness ◽  
Optical Bench ◽  
Proper Understanding ◽  
On Line ◽  
High Resolution Images

HREM has proved to be a powerful technique with wide applications in the materials sciences, but the images even from very thin crystals are not always simple to interpret reliably. Independent knowledge of the specimen thickness, microscope aberrations and operating defocus is usually required for a proper understanding or calculation of high resolution images. Offline, images must be exhaustively matched with those computed from theoretical models incorporating a range of conditions, together with optical diffractometer analysis using a laser optical bench (ODM). This process is time consuming and does not always produce satisfactory results.

scholarly journals Current Research on the Rock Art at Gua Tambun, Perak, Malaysia

2012 ◽  
Vol 31 ◽  
pp. 93 ◽  
Author(s):  
Noel Hidalgo Tan ◽  
Stephen Chia
Keyword(s):  
Image Analysis ◽  
High Resolution ◽  
Chemical Analysis ◽  
Digital Image ◽  
Digital Image Analysis ◽  
Rock Art ◽  
Rock Shelter ◽  
British Military ◽  
Close Range ◽  
Geometric Designs

The rock art site of Gua Tambun in Perak, Malaysia was first reported by J. M. Matthews in 1959, following the discovery of the rock paintings by a British military officer. An estimate of more than 80 forms of animals, humans, geometric designs and many other indistinct and vague forms of paintings were reported to be found on the walls of the rock shelter. Since then, no further in-depth research of the rock art has been reported, while time and weather have eroded and faded the paintings even more. In early January 2009, the site was revisited by the authors to document and to study the rock art in detail. The rock art was documented using a combination of close-range, high-resolution digital photography and digital image analysis was used to reconstruct and recompose the faded images. Samples of the material used for painting the rock art were also collected for chemical analysis and dating. This paper presents the preliminary findings of the research, which include more than 500 forms of rock art found at the site.

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