This paper proposes an improved face recognition scheme using spectral domain features and a multi-layer classification mechanism. The efficiency of the new scheme, in correctly classifying images has been tested thro...
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ISBN:
(纸本)9781479928668
This paper proposes an improved face recognition scheme using spectral domain features and a multi-layer classification mechanism. The efficiency of the new scheme, in correctly classifying images has been tested through an OpenCV implementation using a benchmark face database. The improved classification accuracy of the proposed method is evident from the experimental results.
This paper presents a novel approach to image denoising using adaptive principal components, Our assumptions are that the image is corrupted by additive white Gaussian noise. The new denoising technique performs well ...
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This paper presents a novel approach to image denoising using adaptive principal components, Our assumptions are that the image is corrupted by additive white Gaussian noise. The new denoising technique performs well in terms of imagevisual fidelity, and in terms of PSNR values, the new technique compares very well against some of the most recently published denoising algorithms.
Medical image registration is a difficult problem. Not only a registration algorithm needs to capture both large and small scale image deformations, it also has to deal with global and local image intensity variations...
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ISBN:
(纸本)9781424419982
Medical image registration is a difficult problem. Not only a registration algorithm needs to capture both large and small scale image deformations, it also has to deal with global and local image intensity variations. In this paper we describe a new multiresolution elastic image registration method that challenges these difficulties in image registration. To capture large and small scale image deformations, we use both global and local affine transformation algorithms. To address global and local image intensity variations, we apply an image intensity standardization algorithm to correct image intensity variations. This transforms image intensities into a standard intensity scale, which allows highly accurate registration of medical images.
Built-in post refocus applications begin to appear in cameras of new phone models. Most of them rely on dual or even customized cameras. In this paper, we proposed a solution of post refocus using a single uncalibrate...
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ISBN:
(纸本)9781467376877
Built-in post refocus applications begin to appear in cameras of new phone models. Most of them rely on dual or even customized cameras. In this paper, we proposed a solution of post refocus using a single uncalibrated cellphone camera. The input is a short video clip with minor camera movement, which is commonly caused by nature shaking of hand. After using feature matching to find a reference plane, the parallax of multiple frames will be revised based on the transformation of reference plane and a factorization method is used to recover the relative depth map. Finally, plausible refocus images can be obtained according to the relative depth map. Our solution has no reliance on any specialized lens and can generate adjustable refocus effect, in both focal depth and the degree of out-of-focus.
Object tracking is one of the most important tasks in computer vision. It is aimed to track and identify the targets in every frame automatically, thus making it possible extracting the targets in the frames for the p...
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ISBN:
(纸本)9781509063529
Object tracking is one of the most important tasks in computer vision. It is aimed to track and identify the targets in every frame automatically, thus making it possible extracting the targets in the frames for the post-processing. The described method encompasses two important issues in image tracking system that have received increased attention in the few years: moving object tracking and object recognition. It is based on kernel algorithm and due to the continuously changing background and moving targets, object tracking has been a challenging task We review strategies under kernel algorithm and successfully track and restore the image.
The aim of study is creating a new database which contains fish species and classifing this fish species. A new fish database was created by using the fish photos in seas of Turkey. The new feature set are obtained by...
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ISBN:
(纸本)9781479948741
The aim of study is creating a new database which contains fish species and classifing this fish species. A new fish database was created by using the fish photos in seas of Turkey. The new feature set are obtained by marking the biometric points on fish to identify family and species of fishes. The features were obtained by using the three different biometric measurement techniques (Euclidean network technique, quadratic network technique, triangulation technique). A classificatios system was created by using Naive Bayesian classifier. The obtained accuracy is 93.10% for 7 families on family classification and 75.71% for 15 species on species classification.
This paper presents an image-based visual servoing (IBVS) technique for a quadrotor to track a moving planar target having unknown linear and angular velocities. image moment-based features are derived after transform...
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ISBN:
(纸本)9781665467612
This paper presents an image-based visual servoing (IBVS) technique for a quadrotor to track a moving planar target having unknown linear and angular velocities. image moment-based features are derived after transforming the optical measurements to a virtual image plane parallel to the planar target. The kinematic controller is designed incorporating the linear and angular target velocity estimator blocks. The theoretical analysis demonstrates that the errors converge exponentially to an ultimate bound for time-varying target motion and exponentially to zero if the target motion is purely translational with constant velocity. Unlike past literature, the proposed IBVS scheme can handle unknown arbitrary translational and angular (along the z-axis) motions of the target in a unified and model-free manner. Simulation results using circular and Liassajous target motion are provided to validate the efficacy of the proposed scheme.
The existing study and application of Prolate Spheroidal Wave Function (PSWF) primarily around the characteristics of PSWF in a single energy domain, the characteristics of PSWF in two-dimensional time-frequency energ...
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ISBN:
(纸本)9781509023776
The existing study and application of Prolate Spheroidal Wave Function (PSWF) primarily around the characteristics of PSWF in a single energy domain, the characteristics of PSWF in two-dimensional time-frequency energy domain have not been mining and using, from the perspective of signal time-frequency distribution, Wigner-Ville Distribution with higher time-frequency resolution was introduced to study the time-frequency characteristics of PSWF. The simulation results shows that the PSWF with different parameters with different time-frequency distribution characteristics;at the same time, through the comparison those different of time-frequency distribution, a deeper understanding of the characteristics of PSWF was known, which could further improve the foundation PSWF properties, look for efficient information loading and testing way, and significantly improve the application value of PSWF.
We have developed a prototype SHD (Super High Definition) digital cinema distribution system that can store, transmit and display eight-million-pixel motion pictures that have the image quality of a 35-mm film movie. ...
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ISBN:
(纸本)0819450235
We have developed a prototype SHD (Super High Definition) digital cinema distribution system that can store, transmit and display eight-million-pixel motion pictures that have the image quality of a 35-mm film movie. The system contains a video server, a real-time decoder, and a D-ILA projector. Using a gigabit Ethernet link and TCP/IP, the server transmits JPEG2000 compressed motion picture data streams to the decoder at transmission speeds as high as 300 Mbps. The received data streams are decompressed by the decoder, and then projected onto a screen via the projector. With this system, digital cinema contents can be distributed over a wide-area optical gigabit IP network. However, when digital cinema contents are delivered over long distances by using a gigabit IP network and TCP, the round-trip time increases and network throughput either stops rising or diminishes. In a long-distance SHD digital cinema transmission experiment performed on the Internet2 network in October 2002, we adopted enlargement of the TCP window, multiple TCP connections, and shaping function to control the data transmission quantity. As a result, we succeeded in transmitting the SHD digital cinema content data at about 300 Mbps between Chicago and Los Angeles, a distance of more than 3000 km.
In recent years, the field of visual communication has developed rapidly, and computer graphics and image technology have been fully applied in it. Based on this, this article first expounds the relationship between c...
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