In this paper, a novel Gabor-based kernel Principal Component Analysis (PCA) with doubly nonlinear mapping is proposed for human face recognition. In our approach, the Gabor wavelets are used to extract facial feature...
详细信息
The problem of restoring an image from its convolution with an unknown blur function is a well-known problem in image processing. Many approaches have been proposed to solve the problem and they have shown to have goo...
详细信息
ISBN:
(纸本)9628576623
The problem of restoring an image from its convolution with an unknown blur function is a well-known problem in image processing. Many approaches have been proposed to solve the problem and they have shown to have good performance in identifying the blur function or retrieving the original image. However, in actual implementation, various problems incurred due to the large data size and long computational time of these approaches are undesirable. even with the current computing machines. In this paper, an efficient algorithm is proposed for multichannel blind blur identification based on the discrete periodic Radon transform (DPRT). With the DPRT, the original 2-dimensional multichannel blind blur identification problem can be converted into 1-dimensional ones, which greatly reduces the memory size and computational time required. Experimental results show that a 44% reduction in the number of operations can be achieved as compared to the traditional approach.
Providing media streaming services over a peer-to-peer (P2P) network has attracted much attention in recent few years. In this paper, we focus on a tree structured P2P network for live media streaming. In our proposed...
详细信息
This paper presents a novel colour quantization algorithm for compressed video data. The proposed algorithm extracts DC coefficients and motion vectors of blocks in a shot to estimate a cumulative colour histogram of ...
详细信息
Restoration of color-quantized images is rarely addressed in the literature especially when the images are color-quantized with halftoning. Direct applications of existing restoration techniques are generally inadequa...
详细信息
In most current image/video coding systems, the compression stage and the restoration stage operate separately and hence they cannot make use of each other to optimize the overall coding performance. In this research,...
详细信息
Traditional quantitative study using tracer kinetic modeling requires repeated blood sampling to measure the tracer concentration in plasma. it is invasive, time-consuming and requires costs. In this paper, we propose...
详细信息
ISBN:
(纸本)9628576623
Traditional quantitative study using tracer kinetic modeling requires repeated blood sampling to measure the tracer concentration in plasma. it is invasive, time-consuming and requires costs. In this paper, we propose a new approach to estimate physiological parameters for dynamic Positron Emission Tomography (PET) without levying blood samples. With the new approach, the quantification problem is first converted to discrete blind system identification problem. A multi-channel blind identification technique is applied to estimate the required system parameters. A Monte Carlo simulation is carried out for the proposed approach on estimating the regional cerebral metabolic rate of glucose (rCMRGlc) with the fluoro-deoxy-2-glucose (FDG) model. The results show that the proposed approach can estimate the required physiological parameters comparable to that of traditional invasive approaches.
Lens distortion correction is very important for machine vision applications. Estimation of internal camera parameters is necessary for precise 2D or 3D scene measurements. Nonlinear image warping operation needs a lo...
详细信息
ISBN:
(纸本)9783902661555
Lens distortion correction is very important for machine vision applications. Estimation of internal camera parameters is necessary for precise 2D or 3D scene measurements. Nonlinear image warping operation needs a lot of computational effort and is critical for real-time systems. Modern GPGPU devices give the possibility processing such data but needs fast algorithm for calculations result. In this paper optimized coalescence algorithm for best GPGPU performance is proposed.
In this paper, an efficient algorithm for detecting human faces in color images is proposed. The first step of our algorithm is to segment the possible skin-like regions in an image by using color information. One of ...
详细信息
Human face detection is a challenging task under different lighting conditions. In this paper, we propose an efficient and reliable algorithm to detect human faces in an image. In our algorithm, skin-colored pixels un...
详细信息
暂无评论