The method of photon-counting integral imaging has been introduced recently for three-dimensional object sensing, visualization, recognition and classification of scenes under photon-starved conditions. This paper presents an information-theoretic model for the photon-counting imaging (PCI) method, thereby providing a rigorous foundation for the merits of PCI in terms of image fidelity. This, i...

We have developed an algorithm known as the Z-buffer segmentation (ZBS) algorithm for segmenting vascular structures from 3D MRA images. Previously we evaluated the accuracy of the ZBS algorithm on a voxel level in terms of inclusion and exclusion of vascular and background voxels. In this paper we evaluate the diagnostic fidelity of the ZBS algorithm. By diagnostic fidelity we mean that the da...

The newly emerging theory of compressed sensing (CS) enables restore of a sparse signal from inadequate number of linear projections. Based on compressed sensing theory, a new strategy of high-resolution range profiling of stepped-frequency (SF) radar with missing pulses is proposed. If a certain part of received pulses are missing, we demonstrate the proposed method is capable of reconstructin...

Multi-scale retinex (MSR) processing has been shown to be an effective way to enhance image contrast, but it often has an undesirable desaturating effect on the image colours. A colourrestoration method [2,3]can help mitigate this effect, but our experience is that it simply leads to other problems. In this paper we modify MSR so that it preserves colour fidelity while still enhancing contrast....

The escalation of internet has increased the usage of multimedia contents for wide range of functions. The easy access of the digital contents paves way to manipulate, edit and duplicate the contents using available image processing software. Watermarking process ensures copy protection and data authentication to the multimedia content by embedding watermark. The present paper proposes fidelity...

Digital Image Watermarking is one of the ways to protect intellectual property right and copyright of the information owner. Fidelity, Capacity and Robustness are the important requirements of digital watermarking techniques, but these requirements compete with each other; if one is improved the other two are affected. This paper presents a combined approach of DWT, Chirp-Z and Fast Walsh-Hadam...

We analyze the performance of feature-specific imaging systems. We study incoherent optical systems that directly measure linear projects of the optical irradiance distribution. Direct feature measurement exploit, the multiplex advantage, and for small numbers of projections can provide higher feature-fidelity than those systems that postprocess a conventional image. We examine feature-specific...

Generating high fidelity identity-preserving faces has a wide range of applications. Although a number of generative models have been developed to tackle this problem, it is still far from satisfying. Recently, Generative adversarial network (GAN) has shown great potential for generating or transforming images of exceptional visual fidelity. In this paper, we propose to train GAN iteratively vi...

Image segmentation techniques are predominately based on parameter-laden optimization processes.The segmentation objective function traditionally involves parameters (i.e. weights) that need to be tuned in order to balance the underlying competing cost terms of image data fidelity and contour regularization. In this paper, we propose a novel approach for automatic adaptive energy parameterizati...

For advanced CMOS processes, inverse lithography promises better patterning fidelity than conventional mask correction techniques due to a more complete exploration of the solution space. However, the success of inverse lithography relies highly on customized cost functions whose design and know-how have rarely been discussed. In this paper, we investigate the impacts of various objective funct...