We propose an improved image defogging algorithm based on Retinex, which consists of two parts: HSV color enhancement and RGB space detail enhancement. Through the single-scale Retinex algorithm to enhance the brightn...
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This paper presents a novel and cost-effective approach to convert any projected display on a flat surface into interactive touch board, through the aid of computervision techniques. An interactive touch board is sim...
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ISBN:
(纸本)9781479972258
This paper presents a novel and cost-effective approach to convert any projected display on a flat surface into interactive touch board, through the aid of computervision techniques. An interactive touch board is similar to that of a touch screen available in mobile phones and tablets, but then uses a special stylus for its input and a LCD projector for projecting the display on the surface. Commonly used techniques fall under any of the four categories - Resistive, Capacitive, Electromagnetic and Optical. The paper proposes a method pertaining to the optical technique - involving an infrared camera, a light emitting stylus and an imageprocessing algorithm to determine the position pointed by the user. The stylus has an infrared LED at its tip and capable of producing a tiny spot of light on the projected surface, which is invisible to human eyes. But an IR camera with IR pass filter can be used to capture the light spot and can be processed further. This is the principle technique behind the proposed method. The image from the camera is processed using an algorithm, which determines the coordinates of the IR light. This obtained position along with some calibration parameters is sufficient to calculate the mouse cursor coordinates and thus the cursor can moved to the intended position. The whole of the imageprocessing algorithm has been implemented using the NI LabVIEW and its associated vision and Motion toolkits. Further, the paper deals with the study of potential applications in education and scientific research.
In recent times, traffic jam has become a common problem in the major cities all over the world. In this paper, we propose a dynamic traffic control system by measuring the traffic density at the intersections by real...
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The theoretical and practical issues of the development of a control system for the technical vision of robots, which is based on the specifics of the processed information and the principles of building an integral s...
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It has been a hotspot that a seamless smooth digital panoramic image can be formed by several images for the researches on computervision, imageprocessing andcomputer graphics. According to the limitation of the ap...
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Froth flotation is one of the most important and widespread methods of separation of minerals and waste materials and at the same time one of the most accurate methods of refining low-grade metal minerals. This paper ...
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Lip-reading is the operation of recognizing speech from lip movements. This is a difficult task because the movements of the lips when pronouncing the words are similar for some of them. Viseme is used to describe lip...
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In this paper, an adaptation of the eikonal equation is proposed by considering the latter on weighted graphs of arbitrary structure. This novel approach is based on a family of discrete morphological local and nonloc...
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ISBN:
(纸本)9783642022555
In this paper, an adaptation of the eikonal equation is proposed by considering the latter on weighted graphs of arbitrary structure. This novel approach is based on a family of discrete morphological local and nonlocal gradients expressed by partial difference equations (PdEs). Our formulation of the eikonal equation on weighted graphs generalizes local and nonlocal configurations in the context of imageprocessing and extends this equation for the processing of any unorganized high dimensional discrete data that can be represented by a graph. Our approach leads to a unified formulation for image segmentation and high dimensional irregular data processing.
In aerosol printing, the conductive patterns may suffer from defects that affect their electrical performance due to equipment failure, ink viscosity, and other factors. OpenCV, an open-source computervision library ...
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We review a previously presented proposal - Geometric Texton Theory (GTT) - that feature categories naturally arise through consideration of the maximum likelihood explanations for image measurements by gaussian deriv...
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