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系统工程理论与实践 2005
A New Anti-counterfeiting Technology of Social Security Card Based on UGM and Digital Watermarking
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Abstract:
We present a new anti-counterfeiting technology of social security card based on UGM and digital watermarking. Firstly, the grey scale of watermark image is converted to range (-3,3) using UGM. Secondly, the converted watermark image is added to the middle-frequency range of transformed cover image. Finally, we abstract the watermarking image using inversed wavelet transform and UGM. Then we can judge if the card is valid. The experiment result shows good visual quality both the embedded cover image and the reconstructed watermark image with high computing speed. So the method is applicable.
