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We present a new method for fully automated video matting. This method uses depth information acquired by a depth camera to automatically compute trimaps. Trimaps segment an image into three nonoverlapping regions (foreground, background, and unknown) and generation of a highly accurate trimap is one of the most important tasks in natural alpha matting. We propose an adaptive approach to generate...
This paper describes the development of an Unmanned Aerial Vehicle (UAV) with the aid of a vision processing system for indoor navigation. A co-axial radio-controlled (RC) helicopter is upgraded with a customized on-board avionics system which include two Gumstix Linux computer systems as the on-board processors. A camera module is used to capture real time video during the flight to perform real...
We present a 6×6 array of impedance biosensor circuits implemented in 0.18 μm CMOS. Each pixel contains impedance-measuring circuitry plus tone cancellation circuitry to enable simultaneous measurement of the impedance's dependence on DC bias point. Changes in both impedance and nonlinearity of the electrode-solution interface can indicate binding of the biomolecule of interest. Our measurement scheme...
The optic disc is an important feature in the retina. We propose a method for the detection of the optic disc based on a supervised learning scheme. The method employs pixel and local neighbourhood features extracted from the ROI of a digital retinal fundus photograph. A support vector machine based classification mechanism is used to classify each image point as belonging to the cup and retina. The...
This study aims to understand the course of communication media selection in cross-organizational engineering teams on high-tech product development. We argue that, although collaborative engineering tasks have been highly internationalized, communication media development for the pervasive global technological activities has not been sufficient, and thus when complex product design in connection...
This paper presents an over-segmentation and validation strategy for off-line cursive handwriting recognition. Over-segmentation module is employed to find all the possible character boundaries. Then, the incorrect segmentation points from over-segmenting module are removed by validating processes. The over-segmentation was performed based on the vertical pixel density between upper and lower baselines...
A prototype of silicon array sensor with 256 pixels and a frontend electronics system for its readout was developed for X-ray imaging. The characteristics of the sensor and some test results of the electronics system are presented.
An ultra-high resolution image sensor was developed for industrial and scientific applications. The imager is a full-frame CCD sensor, consisting of 2048 ?? 2048 pixels, and its image area measures 18.43 mm ?? 18.43 mm. The pixel size is 9 microns ?? 9 microns. The sensor has dual readout registers to increase the data rate. The sensor could be operated in the single or dual readout register mode...
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