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In an image capture, a scene with non-uniform illumination has an influence on the image quality, especially the contrast and details in dark regions. For this reason, this paper presents a color correction method using a modified image formation model in which an image is divided into three components: global illumination, local illumination, and reflectance. The global illumination is obtained by...
Separation between specular reflection components and diffuse reflection components is an important subject in robotics and machine vision. Hence, the author's group has developed a method to separate a diffuse image from an image of high-speed video with specular reflection components. The method is based on an estimation technique based on luminance variation due to flicker of a light with an AC...
In this paper, a robust and efficient approach for multicamera human tracking is presented. The approach is integrated in an experimental surveillance system, based on a camera network with a task-oriented architecture. At sensor level, image processing algorithms are applied for object detection and feature extraction. Additionally, for each object that is to be tracked, an agent-based multi-sensor...
This paper presents a fully automated system for realtime 3D human visual hull reconstruction and skeleton voxels extraction. The main contributions include: (1) A novel network based system is presented, which uses AXIS network cameras as video capture device, and performs a parallel processing among data capture, 3D voxel reconstruction and display. (2) A new human visual hull reconstruction algorithm...
In this paper, a new approach for detecting surviving humans in destructed environments using a simulated autonomous robot is proposed. The proposed system uses a passive infrared sensor (PIR) in order to detect the existence of living humans and a low-cost camera in order to acquire a snapshot of the scene as needed. Having detected a sign of a living human, the PIR sensor triggers the camera to...
During the human-robot cooperation assembly process, detecting an operator's position not only protects the operator, but can also predict the operator's intention according to his position. This paper describes an image-based operator monitoring system based on the direct linear transformation (DLT) method. To overcome the changing light conditions in actual factories, a special color filter method...
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