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Recent advances in technology and rapid growth of consumer electronics have made tremendous amount of multimedia information available to the general population. Browsing through large collections of consumer videos and manually creating summaries can be tedious. Automatic summarization techniques will give the user an easy way to look up important content of a collection of media and to browse media...
In this digital information explosion era, more and more products are proposed to enhance the quality and convenience of our life. However, vision-based hand gesture recognition is still a challenging problem to overcome. In this paper, an architecture system was proposed with dual-camera to construct the depth map and recognize dynamic hand gesture. It contains one static and two dynamic hand gestures...
Human action recognition (HAR) is an important topic in computer vision having a wide range of applications: health care, assisted living, surveillance, security, gaming, etc. Despite significant amount of work having been conducted in this area in recent years, the execution speed still limits real-time applications. Moreover, it is highly desirable to have the compute-intensive feature extraction...
This paper describes part of project that implemented the image processing of a CMOS sensor for endoscopic purposes. The sensor is a small sized device of 1×1mm2 and the image processing has been done inside a FPGA. This part of the work describes the implementation of the Gamma function with a balance between the resources needed and the accuracy. A linear piecewise solution was used that stores...
Due to gesture recognition, smart TVs that are controlled by simple motions have been steadily developed and improved. Important problems, however, remain unresolved. In comparison to low-price remote controllers, it is difficult to achieve competitive prices and performances for diverse and complex gesture-recognition systems with the use of costly 3D motion sensors. This study therefore aims to...
If a camera moves while taking a picture, motion blur is induced. There exist mechanical techniques to prevent this effect to occur, but they are cumbersome and expensive. Considering for example an Unmanned Aerial Vehicle (UAV) engaged in a save and rescue mission, where recording frames of scene to identify people and animals to rescue is required. In such cases, weight of equipments is of absolute...
A camera is able to capture only a part of a high dynamic range scene information. The same scene can be fully perceived by the human visual system. This is true especially for real scenes where the difference in light intensity between the dark areas and bright areas is high. The imaging technique which can overcome this problem is called HDR (High Dynamic Range). It produces images from a set of...
Video surveillance systems are becoming very common nowadays. Cameras installed in many places are exposed to sabotage or tampering. This can be done by covering the camera lens, changing the focus of the camera lens or changing the camera position to prevent proper registration of the surveilled area. This paper describes a hardware implementation of a system that can detect these kind of events...
This paper shows a PID (Proportional, Integral, Derivative) controller, implemented in a reconfigurable hardware, to control the gain of a CMOS image sensor. The main functions of the proposed system are: image acquisition, histogram building, histogram analysis, and PID gain control based on the histogram analysis. The system has several functional modules working in parallel in order to achieve...
In our related work, we proposed Cognitive Stereo Auto Focus for stereo camera. Instead of moving optical axis, Cognitive Stereo Auto Focus shifts one side image to the opposite side for setting focus. In the shifting process, focus point should be set on the proper place not to cause any side effect produced by visual fatigue to user. To perform low visual fatigue focusing, Cognitive Stereo Auto...
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