The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
Depth resolution enhancement aims to recover a high quality depth map from one or multiple low-resolution depth input(s) with missing pixels. While a registered high-resolution intensity image is often utilized to assist, little attention has been paid to the circumstances when there is only one pair of low-resolution depth map and aligned intensity image available. In this paper, we propose a novel...
We introduce a precise deterministic approach for pixel-wise change detection in images taken of a scene of interest over time. Our motivation is for applications such as artefact condition monitoring and structural inspection, where a common problem is the need to efficiently and accurately identify subtle signs of damage and deterioration. The approach we describe is designed to compensate for the...
In this paper we propose a new approach to incrementally initialize a manifold surface for automatic 3D reconstruction from images. More precisely we focus on the automatic initialization of a 3D mesh as close as possible to the final solution; indeed many approaches require a good initial solution for further refinement via multi-view stereo techniques. Our novel algorithm automatically estimates...
We propose an efficient algorithm to jointly estimate geometry and semantics for a given geographical region observed by multiple satellite images. Our joint estimation leverages an efficient PatchMatch inference framework defined over lattice discretization of the environment. Our cost function relies on the local planarity assumption to model scene geometry and neural network classification to determine...
This paper reviews video capabilities from Earth orbiting satellites and applications to ocean remote sensing. Videos for purpose of this paper are sequences of images on a fixed location with frame rates in the range of 0.1 to 30 Hz. The number of video capable satellites is increasing. Applications include directional wave spectra, ocean surface currents, surf zone dynamics, and others. Some applications...
The advent of consumer-level plenoptic cameras has sparkled the interest towards the design of efficient compression techniques for light field images. State-of-the-art compression systems such as HEVC prove to be inefficient when directly applied on this type of data due to the inherent spatial discontinuities among neighboring microlens images. In this paper, a novel light field image compression...
Conditional replenishment algorithm (CRA) was proposed to improve the quality of a hybrid 3DTV system with mixed resolution. In the hybrid 3DTV system, the role of a reference view is important since not only the overall quality of the hybrid 3DTV depends on the quality of the reference view, but also the reference view directly affects the quality improvement of the hybrid 3DTV using CRA. Moreover,...
Several generic CE use cases and corresponding techniques for eye gaze estimation (EGE) are reviewed. The optimal approaches for each use case are determined from a review of recent literature. In addition, the most probable error sources for EGE are determined and the impact of these error sources is quantified. A discussion and analysis of the research outcome is given and future work outlined.
Joint acquisition of multispectral images raised a lot of interest due to the applications that can be performed using a wide spectrum of information. Images acquired simultaneously from two spectrums (visible and near infrared) can be fused to generate enhanced images (de-hazing, portrait enhancement, low light, beautification, enhancement). The multispectral images can be combined or used separately...
Smartphone camera resolution is increasing fast to meet the user expectation. With the increase in resolution the need of storage capacity as well as power consumption in processing the images is increasing. Though a user can set the resolution of an image before capture, most of the time the user does not change the pre-selected resolution for capturing multiple images. If the pre-selected resolution...
Developing robust visual tracking algorithms for real-world is still a major challenge today in many fields such as design, manufacturing, ecommerce and other fields are used to simulate the appearance of objects and scenes. Realistic looking is often critical, and calculating global illumination (GI) is an important contributor to image reliability; in which we take into account all interreflection...
For super resolution (SR) of a 3D scene from multi-view low resolution (LR) images, subpixel registration is one of the main problems due to the difference of the depth for different objects, especially for hand-held uncalibrated cameras. In this paper we proposed a method to solve this problem by estimating the depth map for the LR images and treating the registration as a planar segmentation problem...
We developed Tactile Imaging System (TIS), which measures mechanical properties of tissue inclusions. The functional components of TIS include: a monochrome camera, a soft and transparent silicone probe, and an LED illumination circuit. The deformation of the soft TIS probe is used to evaluate size and compliance of inclusions, which is the inverse of elastic modulus. TIS algorithm development and...
Even with the availability of high-resolution color imaging sensors, there are certain limitations in using the visible light band. For instance, visible light easily scatters causing haze in images. The near-infrared (NIR) band offers a viable alternative for such applications. Previous work have demonstrated the uses of NIR in combination with high-resolution colored images. However, the use of...
Machine vision (MV) is the technology which provides camera based analysis of images for various applications such as automatic quality inspection, pattern recognition, process flow control and pattern classification. The machine vision system is expensive as it contains high resolution camera and lenses. The paper proposes an algorithm to develop a low cost web camera based vision system for screw...
Civil engineers use during tests various mechanisms and tools to estimate deformation of structures and materials such as the strain gage, which measures superficial deformation in cylindrical or block pieces, thus registering dimensional changes. Sometimes such experiments cause the destruction of the sensor element, increasing their cost and industrial liter, proportionally to the number of tests...
Phase-shift-based Time-of-Flight (ToF) imaging systems estimate the distances from the camera to the scene points from the phase shift undergone by a modulated light signal, projected onto the scene, instead of actually performing time measurements. The phase shift is typically computed from several values of the cross-correlation between the light signal received by each pixel and a reference signal...
GF-1 is a new generation small satellite in China, designed to realize high resolution and wide swath optical remote sensing mission. The paper firstly introduces the mission characteristics of GF-1, shows on orbit side-slither calibration image which is realized by yaw 90°, and two years running results of GF-1. It also introduces the typical applications in environment, agriculture, land resources,...
Light fields captured by the Lytro-Illum camera are the first to appear in the consumer market, capable of providing refocused pictures at acceptable spatial resolution and quality. Since this is partially due to sampling of a huge number of light rays, efficient compression methods are required to store and exchange light field data. This paper presents a performance study of HEVC-compatible coding...
Water is one of the most precious commodities around the world. However, significant amount of water is lost daily in many countries through broken and leaking pipes. This paper investigates the use of low and high resolution infrared systems to detect water leakage in relatively dry countries. The overall aim is to develop a non-contact and high speed system that could be used to detect leakage in...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.