P
Ping Wah Wong
Researcher at Hewlett-Packard
Publications - 19
Citations - 842
Ping Wah Wong is an academic researcher from Hewlett-Packard. The author has contributed to research in topics: Web application & Pixel. The author has an hindex of 10, co-authored 19 publications receiving 820 citations.
Papers
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Proceedings ArticleDOI
A public key watermark for image verification and authentication
TL;DR: A public key watermarking algorithm for image integrity verification that uses a public key as in public key cryptography, and hence it can be performed by any person without the secure exchange of a secret key.
Journal ArticleDOI
Minimum rate sampling and reconstruction of signals with arbitrary frequency support
Cormac Herley,Ping Wah Wong +1 more
TL;DR: It is demonstrated that for certain spectral supports the minimum rate can be approached or achieved using reconstruction schemes of much lower complexity than those arrived at by using spectral slicing, as in earlier work.
Journal ArticleDOI
A Web-Based Secure System for the Distributed Printing of Documents and Images
TL;DR: The main feature of the system is that it allows previewing and printing of selected documents and images, where only a certain number of hardcopies can be generated based on an agreed payment.
Patent
Area based interpolation for image scaling
Ping Wah Wong,Cormac Herley +1 more
TL;DR: In this paper, an area-based interpolation (ABI) technique is proposed to determine a curve by the pixel value at a location by taking the integral of a curve over a small area, where the size of the area is determined by the sampling size of a sampling cell.
Patent
Method and system to reduce flicker artifacts in captured images
TL;DR: In this paper, a method for controlling artifacts in an image due to a presence of flicker in ambient light is provided, which consists of determining a power frequency for the ambient light; determining a magnitude and phase of the flicker fluctuation; and adjusting the image for the fluctuation based on the power frequency, magnitude, and phase.