Stereo vision is something that most people do everyday without even realizing it. More specifically, as we walk around our environment, our two eyes are constantly taking in a pair of images of the world. Our brain then fuses these two images and unconsciously computes the approximate depth of the objects you see around you. In the field of computer vision, our two eyes are replaced by two cam...

This paper presents an object occlusion detection algorithm using object depth information that is estimated by automatic camera calibration. The object occlusion problem is a major factor to degrade the performance of object tracking and recognition. To detect an object occlusion, the proposed algorithm consists of three steps: (i) automatic camera calibration using both moving objects and a b...

In this paper, we investigate the best approach for estimating the pose between two or more depth cameras. After an overview and a comparison of the existing methods, we first experiment on the accuracy of the calibration when using features from corresponding colour/depth images. Next, we discuss those approaches by considering the interference produced by the presence of several depth cameras...

In this paper we describe a focusing-by-vergence system combining a ow based vergence process with an oo-line pre-calibration of the focusing odometry. The vergence process is controlled by the retinal optical ow disparity and the target depth velocity is directly obtained from this disparity. The relationship between the target depth (focused target distance) and the focusing odometry of the m...

the johor strait is an estuarine system located on the coast of the state of johor in malaysia.the western part of johor strait is a shallow estuarine located between causeway and pulai river. ahydrodynamic model was calibrated based on the environmental fluid dynamic code (efdc) from 4th to 17th of october, 2009. in this calibration, the efdc hydrodynamic model was configured to simulate time ...

The Hyperspectral Imager for the Coastal Ocean (HICO) presently onboard the International Space Station (ISS) is an imaging spectrometer designed for remote sensing of coastal waters. The instrument is not equipped with any onboard spectral and radiometric calibration devices. Here we describe vicarious calibration techniques that have been used in converting the HICO raw digital numbers to cal...

We have developed a liver surgery support system that uses two depth cameras and measures positional relationships between a surgical knife and a liver in real time. In this report, the overview of our system, the method for depth camera calibration, the estimation for knife tip positioning, and some experimental results are described.

Experimental approach of reflectance based vicarious calibration of solar reflectance wavelength region of mission instruments onboard remote sensing satellites is conducted. As an example, vicarious calibration of ASTER/VNIR with estimated aerosol refractive index and size distribution that depends on atmospheric conditions is discussed. Strange solution of estimated refractive index and size ...

Radiographic film dosimetry provides fast, convenient 2-D dose distributions, but is challenged by the dependence of film response on scatter conditions (i.e., energy dependence). Verification of delivered dose in the surface buildup region is important for intensity modulated radiation therapy (IMRT) when volumes of interest encroach on these regions (e.g., head/neck, breast). The current work...