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Different from the photometric images, depth images resolve the distance ambiguity of the scene, while the properties, such as weak texture, high noise, and low resolution, may limit the representation ability of the well-developed descriptors, which are elaborately designed for the photometric images. In this paper, a novel depth descriptor, geodesic invariant feature (GIF), is presented for representing...
Interpolation of the CFA images is used to produce full color images by using Demosaicking Process. Denoising is a technique which is used to remove the noise from a noisy image. The noise will be introduced during acquisition, Transmission and reception & storage phases. Some sensors are using Color Filter Array (CFA) to capture images and reproduce those images into full color images with...
Recently, developing an autonomous navigating vehicle becomes more attention. It is equipped by multiple sensors, such as radar, laser, GPS, and camera. Among these sensors, utilization vision technique is the most adopted method for constructing such a system. It is because the camera provides a lot of information and is low-cost device rather than other sensors. Traffic signs, as one of the most...
One of the current research problems in the field of visual surveillance is optimizing the locations of the visual sensors. The efficiency of visual sensor localization becomes increasingly demanding as it can directly impact the efficiency of allocated resources as well as system performance. This problem can be divided to two sub-problems namely how to prioritize the area of interest and how to...
From extensive study of digital imager defects, we found that “Hot Pixels” are the main digital camera defects, and that they increase at a nearly constant temporal rate over the camera's lifetime. Previously we characterized the hot pixels by a linear function of the exposure time in response to a dark frame setting. Using a camera with 55 known hot pixels, we compared our hot pixel correction algorithm...
Olympic-style weightlifting, or weightlifting, is an athletic discipline that has as a goal lift the heaviest amount of weight attached a weight set. Weightlifting complements other athletic disciplines to increase power and improve performance. Weight training exercises are also an important part of physical rehabilitation from muscle, joint, tendons, and ligaments injuries. To determinate its efficiency,...
This paper proposes a new motion capture system to track human motion with high-speed RGB-D cameras. The proposed system uses synchronized and calibrated high-speed RGB-D cameras to simultaneously record color and depth image sequences of human motion. A new particle-based skeleton tracking process with color and depth features are adopted to track human motion without markers from high-speed RGB-D...
This paper presents the implementation for 3D space sensing and transmission technique. And also introduces tangible telepresence service through applying the technique. Because 3D space sensing and transmission technique is for performing augmented reality, we expect that it may be used in number of various applications to use augmented reality technology.
Cyber-Physical Systems (CPS) have the promise of presenting the next evolution in computing with potential applications that include aerospace, transportation, and various automation systems. These applications motivate advances in the different sub-fields of CPS such as mobile computing, context awareness, and computer vision. However, deploying and testing complete CPSs is known to be a complex...
The color perception of a surface as invariant under changing illumination, called color constancy, is very important in applications such as outdoor navigation. Most color constancy approaches are targeted for single images obtained from cameras whose sensors are assumed to be narrow-band. Algorithms that take advantage of the related information in consecutive frames are rare and require the presence...
Physical inactivity is a leading risk factor in a number of chronic diseases. Older adults are at the highest risk because they are the least inactive of all age groups. Smartphone-based intervention techniques present the opportunity to support cost-effective behavioral intervention to promote physical activity. We present a pilot study that examines the feasibility of utilizing the “Strive” smartphone-based...
A real-time human head detection and tracking method for a fall detection system is presented. It utilizes RGBD images to obtain a head position in the three-dimensional space. The proposed method is designed to be insensitive to a body orientation and requires no initial calibration for the tracked person. The evaluation was performed on the basis of annotated videos with realistic non-studio indoor...
High-resolution elevation and bathymetry data for coastal zones is extremely valuable to many researchers, however the cost of acquiring such data is prohibitively expensive for most research budgets, as it relies on specialized hardware. Mass produced off-the-shelf consumer cameras and sensors are becoming increasingly powerful, and can be affordable alternatives for collecting data. Microsoft's...
With the advent of light emitting diodes (LEDs) in lamps, new ways of user interaction with LED lamps are becoming possible. We present an LED lamp that can sense and pick up the color from an illuminating object. The principle of employing an LED as a wavelength-sensitive light sensor is employed in designing an RGB (red green blue) LED lamp. A design prototype of such an LED lamp is presented, along...
Measuring the geometric structural traits of plants, especially the shape of leaves, plays an important role in the agricultural science. However, most existing techniques and systems have limited overall performance in accuracy, efficiency and descriptive ability, which is insufficient for the requirements in many real applications. In this study, a new kind of sensing device, the Kinect depth sensor...
The objective of this work is to present an object 3D reconstruction method using the point color information. The object 3D reconstruction is performed by combining point clouds obtained from different viewpoints using two cameras and a structured light projector. The main task is the point cloud registration algorithm that matches two point clouds. A well known algorithm for point cloud registration...
In this paper, we propose a novel Stereo-Vision-Assisted (SVA) model for depth map super-resolution. Given a low-resolution depth map as input, we investigate to enhance its resolution or quality using the registered and potentially highresolution color stereo image pair. First, based on the mutual benefits between raw depth map and features of highresolution color image, we model the relationship...
Shadows in most color aerial sensing images with high resolutions are evident, and their existence causes the image degradation and obstructs the image interpretation. In this paper, we propose Pulse Coupled Neural Network (PCNN) algorithm to detect shadows in color aerial images. Experiments and comparisons indicate that the proposed PCNN algorithm is feasible and effective to shadow detection in...
Human gait capture by vision plays an important role in the guidance for the rehabilitation of the lower limbs dysfunction patients. Unfortunately, it is not included in most of the present rehabilitation devices. This paper presents a novel real-time system for human gait capture by detecting the joints trajectory to obtain 3-D information of the joints motion by Kinect. Firstly, we put markers on...
Automatic and intelligent health care service becomes important with the growth of aged population. To achieve intelligent mobility for a smart wheelchair, we proposed to construct a friend user-environment interface that users can interact with the living environment like a normal healthy person. An integrated interactive platform, including touch control panel, together with several cameras, and...
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