Kazunori Umeda

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In recent years, systems to support driving a car using cameras are increasing. As an example, a system to generate overhead view images is proposed and used to assist drivers. In this paper, we propose a method for generating overhead view images with small errors by estimating intrinsic and extrinsic camera parameters of multiple fish-eye cameras. The(More)
AIMS The aim of this study was to analyze the relation between treatment response and the duration of untreated illness (DUI) in 133 outpatients with the first major depressive disorder (MDD) episode. METHODS A logistic regression was performed with DUI, sex, age at onset, and score for 17 items on the Hamilton Depression Rating Scale at the time of start(More)
A range intensity image, which is also called a reflectance image, refers to the intensity image that is acquired simultaneously with the range image captured using an active range sensor. This paper proposes a method that uses this image to correct the color information of a textured 3D model. The color information is usually obtained by texture mapping of(More)
We propose a method for multi-object segmentation in a projection plane. Our algorithm requires a stereo camera system called Subtraction Stereo, which extracts foreground information with a fixed stereo camera. The main contribution of this paper is how the image sequences that include partial occlusion of the foreground objects can be accurately segmented(More)
This paper proposes a human detection method that combines range image segmentation and human detection based on image local features. The method uses a stereo vision system called Subtraction Stereo, which extracts a range image of foreground regions. An extracted range image is segmented for each object by Mean Shift Clustering. Human detection based on(More)
Uncertainty of self-localization is one of the most serious problems related to navigation of autonomous mobile robots. There are some studies that deal with this problem. However, most of them assume that the extent of the uncertainty is known or has been measured previously, though it changes easily with some trivial changes of the environment. To avoid(More)
In this paper, detection of pedestrian groups and counting of the number of pedestrians in each group using “subtraction stereo” are discussed. Subtraction stereo is a stereo vision method that focuses on the movement of objects to make a stereo camera robust and produces range images for moving regions. Pedestrian groups are detected with a standard(More)
We evaluated the immunogenicity and protective activity of plasmid DNA vaccines encoding the influenza virus NP gene (pNP) alone or in combination with the herpes simplex virus type 1 protein 22 gene (pVP22). Optimal immune responses were observed in BALB/c mice immunized with the combination of pVP22 plus pNP, as assessed by enzyme-linked immunosorbent(More)
This paper discusses a range image sensor using a multi-spot laser projector. In many situations, it is inevitable for robots to behave in three-dimensional (3D) environment for various tasks and range images are important sensor information. The sensor in this paper is thought to be suitable to acquire range images for many robotic applications.(More)