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In this paper, a vision-based inspection system has been proposed for the roundness error measurement of a cylindrical part. Evaluation is based on minimum zone (MZC) circle method as to comply with the definition of roundness error given by Y14.5M-1994 and ISO 1001. New approach in the system set-up and image capturing technique has been performed to be in line with the measurement requirement of...
Aiming at the problem of characters defects in the process of bearing production, a set of bearing characters recognition system is designed based on LabVIEW. The system collects the bearing images by CCD camera, the image acquisition card transforms the analog signal into digital signal and the data is delivered to the computer, the program can extract and recognize the characters features by the...
Hands-free gaming systems are likely to gain, in the near future, the total share of the electronic gaming market. Such process has been anticipated by the introduction of the Nintendo Wii that, within a few months from its launch, stably reached the top ranking of sales among gaming systems. We can expect something similar will occur once the for-long expected Microsoft Kinect system will be available...
In this paper, we propose a parallel processing method to generate free viewpoint image in realtime. It is impossible to arrange the cameras in a high density realistically though it is necessary to capture images of the scene from innumerable cameras to express the free viewpoint image. Therefore, it is necessary to interpolate the image of arbitrary viewpoint from limited captured images. However,...
A digital video is composed of a series of frame images. The continuous rotation angles are computed using the frame images grabbed from the rotation angle measurement video. An angle is calculated with the cosine theorem through the center point, start point and object point in a frame image and is compensated to a rotation angle. The positions of the object point in frame images are different during...
This Pervasive computing is the "post-PC" product of the times, and are profoundly affecting computer vision science. Using of pervasive computing method can achieve accurate detection of objects moving target location, thus fulfilling the object of physical space and information space integration. Based on the binocular visual motion detection algorithm is proposed. Using multiple cameras...
Depth estimation of an object in a scene from images intensity is an essential problem in machine vision applications. Here, In order to obtain the distance between object and camera, a novel method presented for depth estimation from a single defocus blurred image. Unlike other methods for depth estimation which are based on the characteristics of the three-dimensional information, here, only constant...
As devices such as computers, sensors and motors have decreased in size, wearable computing has become an increasingly active area of research. Guidance of general human behavior by expert navigation is expected to be realized through the development of wearable computing. We aim to apply this technology to first-aid treatment. If an injured or ill person requires first-aid treatment but only non-experts...
Computer holographic stereogram (CHS) is useful for holographic 3D TV because it is constructed from the multi camera horizontal viewpoint plane images and is compatible to the multi holographic stereogram image. Each hologram is recorded as a slit hologram (element hologram) but total viewing area and the number of the element holograms have been limited to some extent by the size and the resolution...
Image/Video Sensor Networks are emerging applications for sensor network technologies, allowing visual data to be returned to interested observers. In this paper, we present a complete Image/Video Sensor Web design and implementation experience, in which an Internet-Accessible Image/Video Sensor Web Testbed is build. Selected experiment designs and results for multi-hop image/video sensor network...
Recently, multi-touch tabletop displays provided the Natural User Interface (NUI). Humans use the bare finger as a pointing device for manipulation of interactive elements on multi-touch surface. However, fingertip size occupies the large space instead of appropriate target point and creates ambiguity in touch detection. To overcome issue possibly, we develop an optical multi-touch screen using the...
A real-time sausage appearance defect inspection system is presented in this paper. The general hardware and software structure is presented and a model method for sausage defect detection is proposed. This inspection system gives consistent and repeatable satisfactory results under real industrial conditions with sufficient speed.
In this paper, the cross-section image of the wood fiber air filter element (WFAFE) is obtained by the digital camera linked with a microscope, simultaneously, the best threshold method is adopted to analysis the hole and background of image, then the hole parameters of WFAFE, such as hole ratio, hole ratio uniformity, hole equivalent diameter, hole distribution and shape factor, all can be obtained...
Camera calibration is one of the key procedures for computer vision and the accuracy of camera calibration is of vital importance in terms of ensuring the systematic measurement accuracy. An automatic calibration method based on traditional camera calibration is proposed in this paper. First of all, calibrated image series can be gained by using improved calibrating template with regional calibration...
We are interested in the problem of automatically tracking football players, subject to the constraint that only one vantage point is available. Tracking algorithms benefit from seeing the entire playing field, as one does not have to worry about objects entering and leaving the field of view. However, the image of the entire field must be of sufficient resolution to allow each of the players to be...
An improved algorithm of epipolar line rectification for stereo pairs, which combines Seitz Method with Francesco Method, is proposed. Firstly, the fundamental matrix is calculated using the improved eight-point algorithm (or other improved methods such as weighted normalization algorithm) and then as an input for Seitz Method to get the projective transformation matrices. Finally, these matrices...
This paper investigates a human hand motion capture based on back projection of human hand's silhouette images extracted from multi-camera images. The multi-camera system consists of a server-client system to run the motion capture in real time, and small USB cameras are utilized to make the system compact and low cost. To achieve robust extraction of the hand's silhouette that is used in silhouette...
The nature has a beautiful source of inspiration for reaching invisibility. Jellyfish are well-known sea creatures that are transparent and look transparent so that they are almost invisible in seawater. Consider flat fishes such as winter flounders that hide themselves from predators by adapting their skin pigments according to the background environment, cells, located in the dermis and epidermis...
This paper presents a solution of acquiring high-resolution face image. Instead of using super-resolution methods, a multi-sensor system which uses static cameras to detect face while uses an IP speed dome camera to focus to the face detected is deployed. As the result of system, a real high-resolution face image is stored on disk. Experiments show that a promising result is achieved.
In this article it is presented a reconfigurable transmission scheme for the lossy image transmission over congested wireless sensor networks (WSNs). This transmission scheme is based on the quad-tree algorithm for compressing each frame before transmitting it over the network. The proposed architecture: a) performs buffered transmission of quad-tree decomposed packets of an image frame over the WSN,...
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