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Pinhole-array-based hand-held light field cameras can be used to capture 4-dimensional light field data for different applications such as digital refocusing and depth estimation. Our previous experiences suggest the design of the pinhole array mask is very critical to the performance of the camera, and the selection of mask parameters could be very different between applications. In this paper, we...
A context aware environment for workshop with game storming was developed with vision sensors and was evaluated its capability for supporting facilitator of workshop through feasibility test. In this paper, overview of the aware environment for workshop, basic capability of the environment, and results of feasibility test are described.
By using a data-driven communication pattern other than location-driven pattern, Named Data Networking (NDN) offers better support for content distribution applications such as video playback application. We propose NDNlive, which exploits the features of NDN to stream live and prerecorded video captured by the camera to multiple players. Instead of fixed-size segmentation, NDNlive chops video stream...
The quadcopter technology has been developed for many years. It has the advantages of light weight, small size, high mobility and autonomy. At present, it is already a proven technology, especially in outdoor environments. As the Global Positioning System (GPS) can provide accurate geographic coordinates for quadcopters, this endows the drones with certain abilities, such as loiter and waypoint navigation...
The technique is applied for capturing the surface image of a golf ball. The mechanisms involved in this study to design include: 6 CCD cameras, positioning control mechanisms, lighting devices. Mechanisms to position the camera view angles are required for design. Included in the design is XYZ positioning and rotational mechanism of the ball orientation. This study gives a prototype design and the...
The accuracy of the image is dependent on the quality parameters of camera. The camera parameters is obtained from the target calibration of the test bench in past. Recently, the image processing software can be dealt with the target-free calibration by internal programming. In this research, the images of unmanned aerial vehicle (UAV) are examined by two types of processes, target calibration and...
It has become an increasingly important issue with respect to improve the efficacy of rehabilitation and increase patient willingness to attend rehabilitation treatment in recent years. Virtual Reality (VR) has been used in combination with medical treatment and technology. More specifically, its skeletal tracking system is being widely used in the field of medicine and rehabilitation. Although the...
In this paper, we propose a position estimation method utilizing image recognition for an automatic traveling wheelchair. The proposed method includes image magnification to extend the recognition distance and image recognition to estimate the position by utilizing a relationship in which the size of the object in an image is inversely proportional to the distance between the camera and the object...
Parabolic motion cameras are used to obtain better deblurring results of scenes with multiple moving objects. The core of its deblurring process is Iterative Re-weighted Least Squares (IRLS) method. In this paper, we design a hardware accelerator for IRLS flow. The ASIC chip is implemented using TSMC 90 nm technology. It is capable of deblurring a 640 × 480 image captured by a parabolic camera with...
Conventional depth estimation methods for light field cameras often fail to estimate sharp object boundaries. We propose a depth estimation method using a wavelet-based matching cost calculation and an estimation optimization, which can estimate sharp object boundaries. Our method first calculates matching costs on four subband images derived with a wavelet transform, and then combines the costs based...
In this paper, we proposed an IoT-based visitor detection system. It uses an IR sensor to detect human body and two ultrasonic sensors to locate visitor servo motor under the position. When a visitor is detected it drives camera module to locate the visitor. Recoded video and sensor data are stored in the Database. Saved data can see via the PC and Smart device. We developed the system using Raspberry...
In an image fusion, misalignment errors are generated in the boundaries between objects and background. To solve this problem, this paper presents an image fusion method using the optimal mask that contains main objects. The proposed method consists of three steps: i) pre-processing and global warping to register a tele-view image to a wide-view image, ii) generating seam-based optimal mask to detect...
The exercise and rehabilitation based on computer vision system have many benefits and it has attracted the interest of researchers in the computer vision community. The researchers have kept on improving the existing methods by creating novel method or developing new algorithms in image processing and artificial intelligence. This paper presents the experiment and analysis of wrist radial and ulnar...
Information is one of the foremost fact in the prompt world. Within that, text information plays an imperative role and can acquire diverse mold. The natural images that consist of such text information are called scene text images. Semantic information of the image is used for content-based image retrieval, indexing and classification purpose. First stage of text extraction is the text and non-text...
In unmanned construction, work efficiency is lower than that in manned construction due to lack of visual information. Thus, we previously developed an autonomous camera control system to provide various visual information suited to work states through multiple displays. However, that system increased the cognitive load on operators, and required them to have much experience to choose appropriate...
Equirectangular panoramas are popular tools for achieving 360 degree immersed viewing experiences. A panorama captures a scene from one point and panoramic viewers allow the user to control the viewing direction, but the viewer is not allowed to move around. This study proposes a strategy for transforming equirectangular panoramic images with the effect of moving freely in three dimensions. The strategy...
One of the biggest challenges of RGB-D posture tracking is separating appendages such as briefcases, trolleys, and backpacks from the human body. Markerless motion tracking relies on segmenting each depth frame to a finite set of body parts. This is achieved via supervised learning by assigning each pixel to a certain body part. The training image set for the supervised learning are usually synthesised...
Police body cameras are increasingly being used in many places. While body cameras do promote accountability, there are concerns over the loss of privacy as a result of these cameras. Police departments have tried to balance these two concerns by training officers on what incidents to record, and what not to record. However, the existing approach is error prone. This paper describes an encryption-based...
In this paper, we propose an indoor action detection system which can automatically keep the log of users' activities of daily life since each activity generally consists of a number of actions. The hardware setting here adopts top-view depth cameras which makes our system less privacy sensitive and less annoying to the users, too. We regard the series of images of an action as a set of key-poses...
Due to the large amount of videos generated through several data sources, the development of efficient mechanisms for storing, indexing, retrieving and visualizing their content is a challenging task. Temporal video segmentation is the automatic process of detecting transitions in video sequences, which is a fundamental step in the analysis of video content. This work proposes and evaluates an improved...
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