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Currently, an antimicrobial effectiveness that indicated by the diameter of the inhibition zones of antimicrobial was measured using manual tools such as rulers or calipers. In this paper, a camera-based system for virtual measurement of the diameter of the inhibition zones is introduced using a non-metric camera. The hardware consists of a set of measuring instruments, light source, and a camera...
Camera calibration methods are commonly evaluated on cumula-tive reprojection error metrics, on disparate one-dimensional da-tasets. To evaluate calibration of cameras in two-dimensional ar-rays, assessments need to be made on two-dimensional datasets with constraints on camera parameters. In this study, accuracy of several multi-camera calibration methods has been evaluated on camera parameters that...
A view synthesis problem is to generate a virtual view based on the given one or multiple views and their associated depth maps. We adopt the depth image based rendering (DIBR) approach in this paper for synthesizing the new views. No explicit 3D modeling is involved. Another component of this study is the popular commodity RGB-D (color plus depth) cameras. The color and depth images captured by a...
Camera calibration is a key technology in the field of computer vision. And camera self-calibration is one of the methods about camera calibration. It can calculate the camera intrinsic parameters only by the geometrical information between the images. In this paper, we propose a novel method which is combined with the Matlab calibration toolbox and genetic algorithm to solve the camera intrinsic...
Three Dimensional reconstruction of an object is one of the current research topics. This paper discusses the generation of a model in Three-Dimensional space by taking views of the object from different angles. Image acquisition is done using a single digital camera and turn table. Camera calibration is done using the images of checkerboard pattern. Camera calibration gives the intrinsic and extrinsic...
The article describes the spherical panorama stitching algorithm using several pairs of calibrated cameras and panorama navigation technique using inertial measurement unit data.
Simple perspective transforms are used in Advanced Driver Assistance Systems (ADAS) in vehicles for converting captured images of lateral, front, and rear views into a synthesized top-view image, which displays the scene as viewed from above the vehicle. These transforms, however, are typically derived using a basic calibration procedure that is only capable of correctly mapping ground-plane points...
A new method for charge-coupled device (CCD) image processing is presented, based on on-chip pixel binning and generation of several output image signals from a single sensor exposure. Output images differ by resolution, signal-to-noise ratio and sensor pixels region. The method results in reduced frame readout time and increased signal-to-noise ratio in trade for spatial resolution. When used in...
Smart cameras are cameras which not only perform the sensing, but also integrate much of the image analysis and control. This paper describes the replacement of a conventional vision system within a Trax playing robot with an FPGA based smart camera. Integrated within the camera are the following functions: camera calibration, tile detection and localization, human player detection, robot control,...
Aim of this paper is to propose a methodology of real-time hand detection based on skin color model and background subtraction under any complex background with extracting the depth information. With the use of stereo camera calibration and disparity mapping, the depth information of the hand is extracted. Reasonable selection of threshold of skin color model and combining with background difference...
Generally, Around View Monitoring (AVM) system is consisted of four cameras and each camera image is stitched into a single image. AVM system is used in lane detection or object detection like pedestrian detection. To avoid the inconsistent performance due to deviations of camera installation, the camera should be installed and calibrated at the first time. After then, if the image is inconsistent...
Due to increasing labor costs, the demand for factory automation (FA) continues to rise. Global demand also exists for industrial robots. Thus, autonomous robots that can perform advanced tasks are required in many scientific and technological fields. Although it is difficult for stand-alone robots to perform such random bin-picking tasks as grasping an arbitrary apple from a pile of them, we can...
Automatic video analysis of interactions between road users is desired for city and road planning. A first step of such a system is object localization of road users. In this work, we present a method of detecting a specific car in an intersection from a monocular camera image. A camera calibration and segmentation are utilized as inputs by the method in order to detect a car. Using these inputs,...
An important property of surface areas of objects as observed by a calibrated monocular camera is introduced; also improved techniques to apply the property to people number estimation are proposed. Standard surface area (SSA) is defined as the surface area of the reverse projection of an image-pixel onto a plane at specific height in the real world. SSA is calculated for each pixel according to camera...
In this paper we describe a 2D/3D vision sensor, which consists of a laser triangulation sensor and matrix colour camera. The outcome of this sensor is the fusion of the 3D data delivered from the laser triangulation sensor and the colour information of the matrix camera in the form of a coloured point cloud. For this reason a novel calibration method for the laser triangulation sensor was developed,...
The application of imaging devices in underwater environments has become a common practice. Protecting the camera's constituent electric parts against water leads to refractive effects emanating from the water-glass-air transition of light rays. These non-linear distortions can not be modeled by the pinhole camera model. For our new approach we focus on flat interface systems. By handling refractive...
Endoscopic disc surgery requires a process of inserting a guide-needle to the target lumbar disc. And the insertion path is manually planned by drawing lines on the patient's skin while monitoring the fluoroscopic view of the lumbar. Such operative procedure inevitably exposes both surgeon and patient to the fluoroscopic radiation emitted from c-arm for a long time. To reduce the radiation exposure...
Precisely positioning in the automatic operations can always be seen in a complex system. However, it is difficult to achieve accurate calibration in a state of motion by traditional methods due to their necessities to calibrate reference objects. Though the camera self-calibration in motion has better flexibility and practicality than the traditional method, it is still long before it really addresses...
This paper presents a novel approach of video fire detection by the features of fire extracted in radiant energy domain. Firstly, a fire color model in YCbCr color space is applied to extract fire-colored pixels as candidate regions of fire. Secondly, we convert the color space of the candidate regions into radiant energy domain through camera calibration in advance and model six features of fire...
This paper presents a generic obstacle detection system using single camera image sequence processing, for Android smart mobile devices. The algorithm relies on transforming the images into bird eye views of the scene using Inverse Perspective Mapping, followed by intensity based segmentation. The obstacle area hypotheses are used for updating a particle based occupancy grid. The sensors built in...
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