Karl Raab

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Watermarking has been suggested as a means to improve security of biometric systems or to add additional functionalities to such systems. We experimentally investigate the impact of applying a set of blind robust watermarking schemes on the recognition performance of two iris recognition algorithms. We find that different watermarking schemes result in a(More)
In wireless and mobile environments, universal media access is a key concept to facilitate efficient transmission of visual data by simple bitstream adaptation which relies on scalable coding schemes. Six different blind watermarking schemes are compared with respect to their watermark detection performance on scaled visual data. Specifically, resolution(More)
Watermarking has been suggested as a means to improve security of biometric systems. We discuss application scenarios for resolving various security issues in this context. As embedding watermarks changes biometric data, degraded recognition performance using such data may be expected. We experimentally investigate the impact of applying a set of blind(More)
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