title: Nondestructive imaging of hidden figures on license plates by X-ray radiograph.
abstract: 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.
authors.affiliation: 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
authors.forename: Oc-Yeub
authors.initials: OY
authors.lastname: Jeon
authors.forename: Sang-Hyeon
authors.initials: SH
authors.lastname: Kim
authors.forename: Joong
authors.initials: J
authors.lastname: Lee
authors.forename: Jong-Taek
authors.initials: JT
authors.lastname: Park
authors.forename: Tae-Hoon
authors.initials: TH
authors.lastname: Kim
authors.forename: Hak-Soo
authors.initials: HS
authors.lastname: Park
authors.forename: Il-Kwon
authors.initials: IK
authors.lastname: Huh
authors.forename: Hyung-Tae
authors.initials: HT
authors.lastname: Kang