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We propose a method that analyzes the structure of a large volume of general broadcast video data by the appearance patterns of near-duplicate video segments. We define six classification rules based on the appearance patterns of near-duplicate video segments according to their roles, and evaluated them over more than 1,000 hours of actual broadcast video data.
We propose a method for construction of a cascaded traffic sign detector. Viola et al. have proposed a robust and extremely rapid object detection method based on a boosted cascade of simple feature classifiers. To obtain a high detection accuracy in real environment, it is necessary to train the classifier with a set of learning images which contain various appearances of detection targets. However,...
Wikipedia is a famous online encyclopedia. However most Wikipedia entries are mainly explained by text, so it will be very informative to enhance the contents with multimedia information such as videos. Thus we are working on a method to extend information of Wikipedia entries by means of broadcast videos which explain the entries. In this work, we focus especially on news videos and Wikipedia entries...
In this paper, we propose a method for recognizing low-resolution characters using a super-resolution technique. Although portable digital cameras can be used for camera based character recognition, the captured images contain several types of noises which make the recognition task difficult. We introduce a phase of super-resolution before the recognition to enhance the resolution of images obtained...
Many research works have been carried out to measure and use a driver's gaze directions to prevent traffic accidents caused by inattentive driving, neglect to confirm safe conditions, and other driver errors. A calibration process is needed to measure correct gaze directions for a gaze tracking system. However, existing calibration methods require a driver to gaze at specified points before driving...
This paper focuses on ego-localization using in-vehicle cameras. We propose a 2D ego-localization method using streetscape appearance as a feature of image matching and the triangulation of matching results. The image sequences of two in-vehicle cameras are matched to a database that contains a sequence of streetscape images and their corresponding positions. First, the proposed method searches for...
This paper describes a method for tracking the camera motion of a flexible endoscope, in particular a bronchoscope, using epipolar geometry analysis and intensity-based image registration. The method proposed here does not use a positional sensor attached to the endoscope. Instead, it tracks camera motion using real endoscopic (RE) video images obtained at the time of the procedure and X-ray CT images...
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