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It is one of the common tasks of machine vision defect detection to judge whether the resistance of PCB board is correct or not. The traditional detection method is to use the color industrial camera to take pictures, then transform the image from the RGB color model to the HSI / HSV color model, according to different colors in the new color space have different characteristics to split it out. However,...
Parsing urban scene images benefits many applications, especially self-driving. Most of the current solutions employ generic image parsing models that treat all scales and locations in the images equally and do not consider the geometry property of car-captured urban scene images. Thus, they suffer from heterogeneous object scales caused by perspective projection of cameras on actual scenes and inevitably...
It is discovered that explicit interference threshold of susceptible equipment under EMI is hardly ascertained. So in this paper, the concept of probability threshold is put forward and electromagnetic susceptibility tests on digital cameras against the ESD (Electro-Static Discharge) EMP, the square pulse and the C band HPM (High power microwave) is carried out. The EMI effects observed on the cameras...
Smart parking solutions for big cities are critically important for reducing traffic congestion and vehicle energy consumption in big cities. Visual-based detection methods have been proposed since their maintenance costs are typically lower. However, visual based detection methods in existing systems are not robust due to varying light intensities, occlusions, and their deployment costs can still...
This paper presents a method for image perspective correction using camera intrinsic parameters. This method is based on two assumptions: a) the taken picture have a rectangle area, but didn't know the rectangle area's aspect ratio; b) the camera's intrinsic parameters should obtain by picture (Intrinsic parameters can easily obtain in iPhone or Android phone). The rectangle's perspective distortion...
Motivated by the emerging needs to improve the quality of life for the elderly and disabled individuals who rely on wheelchairs for mobility, and who might have limited or no hand functionality at all, we propose an egocentric computer vision based co-robot wheelchair to enhance their mobility without hand usage. The co-robot wheelchair is built upon a typical commercial power wheelchair. The user...
The deep-sea tripod systems designed and built at the U.S. Geological Survey (USGS) Pacific Coastal and Marine Science Center (PCMSC) in Santa Cruz, California. They were recovered in late September 2014 after spending about half a year collecting data on the floor of the South China Sea. The Free-Ascending Tripod (FAT) was deployed at 2,100 meters water depth—roughly 10 times as deep as most tripods...
This paper describes a novel method of enhancing shallow ocean optical images or videos using a fast dark channel prior descattering method. Absorption, scattering and color distortion are three major distortion problems for underwater imaging. In this paper, we propose a novel shallow water imaging model to compensate for the attenuation discrepancy along the propagation path and an effective underwater...
In order to determine the 3D motion of a point target from a monocular moving camera, a locating method is proposed by taking advantage of the property that the positions of the target in a short time are relative to each other and the kernel trick of least squares support vector machine (LS-SVM). This method has better noise immunity due to its robust estimation property, and has high accuracy as...
In order to achieve accurate automatic recovery of fixed-wing UAV at the known landing site, an airborne aided landing navigation system based on machine vision is designed and realized, and the key algorithms of the system are investigated. First, according to the need of automatic landing, such as high precision, real-time and strong anti-interference ability, a scheme of vision-aided landing navigation...
We propose a new algorithm for blind restoration of very-high-ISO photos. Unlike previous methods that sequentially tackle the problem of noise estimation and image denoising, our approach alternatively refines the estimates of latent image and noise level function (NLF). We rigorously show how the existing low-rank based modeling of image prior can be extended to incorporate spatially inhomogeneous...
This paper presents a novel extrinsic calibration method based on four-layer laser and a camera, In the case of camera intrinsic parameters are known, we can obtain the corresponding points on a set of laser data and image feature points by using the same feature that both captured by laser and camera, which followed by acquiring the extrinsic parameters of sensor sysems according to the projective...
In this paper, we propose a new approach to depth map generation for multiview video system. Our goal is to improve 3D scene representation consistency by exchanging spatial information between all depth maps in multiview video. The presented algorithm mainly adopts Scale Invariant Feature Transform (SIFT) and jointly disparity and disparity estimation technique. This algorithm first uses the SIFT...
This paper studies the optimal visibility coverage for autonomous robots in complex 3D environments. The perception sensor equipped on an inspection robot usually has a pyramid-shaped visible range with limited distance and angle. Finding the optimal pyramid visibility coverage for a given 3D region is NP hard; this paper presents an effective progressive integer linear programming algorithm to compute...
Real-time motion detection is a key technology in the intelligent video surveillance and traffic video flow. Widely used methods based on monocular vision are sensitive to light and have problems of black hole and shadow. To solve these problems, we proposed a motion detection method based on binocular vision. The segmentation of move object is based on the distinctive of depth information which is...
Due to many advantages, the mobile manipulators have been used in many areas. However, it is challenging to operate such system in teleoperation because of the too many controllable degrees for the teleoperator. Additionally, because of the unstructured working environment, it is necessary for the mobile manipulator to posses the ability of solving this problem in real time. The existing methods cannot...
This article proposes a method of constructing a ping-pong system via marker less real rackets in collaborative augmented reality. Except a pair of video cameras, without any other sensors or artificial markers, users can use real rackets to hit virtual ping-pong ball on a virtual table and interact with remote partners in augmented reality scene just as they were playing ping-pong in the same place...
A measurement system is designed and produced to map the flux density of concentrated solar radiation in the focal plane of solar furnace with an indirect method. It includes a Lambertian moving bar, a CCD-camera and flux gauges. The movement of the bar and the image taking and processing are controlled by a computer. An integrated gray image which indicates the relative value of the radiation flux...
DLT (direct linear transformation) is one of the most popular methods of data simplification for camera calibration. An improved DLT method is proposed, the projective pseudo-inverse matrix is used to describe the relations between 2D coordinates and 3D coordinates, the improved DLT method can calculate the projective pseudo-inverse matrix based on only 4 known pixel points. The experiment results...
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