Nondestructive imaging of hidden figures on license plates by X-ray radiograph.
In this case, we investigated the modified license plates. The evidences had new embossing pressed serial numbers after erasing the original numbers on the license plates by hammering. The X-ray radiograph could visualize the hidden figures; those were virtually unseen by naked eyes or undetectable by ordinary photography. To reveal the erased figures, we performed image processing with computer software after X-ray radiographs. It proved to be an efficient nondestructive way to visualize the hidden original figures on metals.
Jeon
Oc-Yeub
OY
Physical Analysis Division, National Institute of Scientific Investigation, 331-1 Shin-Wol-7-Dong, Yang-Cheon-Gu, Seoul 158-707, Republic of Korea. yeubjeon@nisi.go.kr
Kim
Sang-Hyeon
SH
Lee
Joong
J
Park
Jong-Taek
JT
Kim
Tae-Hoon
TH
Park
Hak-Soo
HS
Huh
Il-Kwon
IK
Kang
Hyung-Tae
HT