Large non-linear distortion in a finger mark, introduced at the time when a latent print was left in crime scenes, is one main difficulty in forensic fingerprint matching [1] compared to plain or rolled fingerprint matching. It is significant and desirable that AFIS systems in forensic applications have much higher distortion tolerance compared to those systems for civil purposes. Moreover, rec...

We introduce the idea of distortion side information, which does not directly depend on the source but instead affects the distortion measure. We show that such distortion side information is not only useful at the encoder, but that under certain conditions, knowing it at only the encoder is as good as knowing it at both encoder and decoder, and knowing it at only the decoder is useless. Thus d...

Given a discrete memoryless source (DMS) with probability mass function P, we seek first an asymptotically optimal description of the source with distortion not exceeding AI, followed by an asymptotically optimal refined description with distortion not exceeding A2 < Al. The rate-distortion function for successive refinement by partitioning, denoted R(P, Al. Az), is the overall optimal rate of ...

The distortion from massive MIMO (multiple-input– multiple-output) base stations with nonlinear amplifiers is studied and its radiation pattern is derived. The distortion is analyzed both in-band and out-of-band. By using an orthogonal Hermite representation of the amplified signal, the spatial crosscorrelation matrix of the nonlinear distortion is obtained. It shows that, if the input signal t...

In this paper, we develop algorithms for estimating transmission distortion in wireless video communication systems. By leveraging the analytical results obtained in our previous paper (Part I), we design low complexity algorithms that are capable of estimating transmission distortion accurately. We also extend our algorithm for pixel-level transmission distortion estimation to pixel-level end-...

High-capacity image watermarking scheme aims at maximize bit rate of hiding information, neither eliciting perceptible image distortion nor facilitating special watermark attack. Texture, in preattentive vision, delivers itself by concise high-order statistics, and holds high capacity for watermark. However, traditional distortion constraint, e.g. just-noticeable-distortion (JND), cannot evalua...

The authors are with the Itek Corporation, Lexington, Massachusetts 02173. Received 25 September 1973. In this letter an interferometric method of measuring plotter distortion is described. A common method of measuring plotter distortion is to draw a known pattern, such as straight lines, and scan this pattern with a microdensitometer. This is a precise method of measuring distortion; however, ...

This paper unifies the work on multiple reinsurers, distortion risk measures, premium budgets, and heterogeneous beliefs. An insurer minimizes a measure, while seeking reinsurance with finitely many reinsurers. The reinsurers use principles, they are allowed to have beliefs regarding underlying probability distribution. We provide characterization of optimal indemnities, we show that layer-insu...

In-situ hearing aid distortion is defined as distortion measured in the ear canal with stimulus inputs and hearing aid settings that are similar to those the hearing aid wearer will experience in daily life. This preliminary study examined possible relationships between in-situ distortion and benefit for appropriately fitted contemporary hearing aids. Simulated in-situ distortion was determined...

Acuity is the most commonly used measure of visual function, and reductions in acuity are associated with most eye diseases. Metamorphopsia--a perceived distortion of visual space--is another common symptom of visual impairment and is currently assessed qualitatively using Amsler (1953) charts. In order to quantify the impact of metamorphopsia on acuity, we measured the effect of physical spati...