【摘 要】
：
Shadow maps sample scene visibility in the light source space and offer an efficient solution to generate hard shadows.However,they suffer from aliasing artifacts because of discretization errors,inad
【出 处】
：
Science China(Information Sciences)
论文部分内容阅读
Shadow maps sample scene visibility in the light source space and offer an efficient solution to generate hard shadows.However,they suffer from aliasing artifacts because of discretization errors,inadequate resolution and projection distortion.In this
其他文献
X射线康普顿背散射(CBS)技术是一项较新的射线安检技术,可以提高复杂背景下安检设备对爆炸物等有机违禁品的探测力度,这其中一个重要环节就是图像中有机违禁品的分割问题,本文分析了CBS技术成像图像的特点,有针对性地提出了一种基于EM聚类的图像中有机违禁品的图像分割方法,实验结果表明该方法具有很好的适用性。
目的和意义:依托医院PACS安装和实施的契机,充分利用医院的病例特点和中医诊疗优势,通过结合中医辨证论治的要求对医学影像和信息进行计算机智能化处理后,达到摒弃影像诊断传统的肉眼观察和主观判断的目的。借助计算机技术,对影像的像素点进行分析、计算和处理,以得到相关的完整数据,为医学影像诊断提供更客观的信息的同时建立相关不同疾病分类的教学模块,填补国内在中医药大学医学影像学教学和科研计算机评价体系方面的
This paper proposes a tree-based backoff (TBB) protocol that reduces the number of iterations implemented in the procedure of tag collision arbitration in radio frequency identification (RFID) systems
In order to recognize facial expression accurately, the paper proposed a hybrid method of principal component analysis (PCA) and local binary pattern (LBP). Firstly, the method of eight eyes segmentat
Crowded scene analysis is currently a hot and challenging topic in computer vision field. The ability to analyze motion patterns from videos is a difficult, but critical part of this problem. In this
目前模式识别领域中缺乏有效的多类概率建模方法,对此提出利用纠错输出编码作为多类概率建模框架,将二元纠错输出编码研究的概率输出问题转化为线性超定方程的求解问题,通过线性最小二乘法来求解并获取多类后验概率的结果;而对于三元纠错输出编码的等价非线性超定方程组,提出一种迭代法则来求解多类概率输出.实验中通过与3种经典方法相比较可以发现,新方法求取的概率输出具有更好的分布形态,并且该方法具有较好的分类性能.
In signal and image processing,we want to recover a faithful representation of an original scene from blurred,noisy image data.This process can be transformed mathematically into solving a linear syst
The estimation of the signal variance is a critical challenge in wavelet-domain minimum mean square error(MMSE) based image denoising.In contrast to the conventional approaches that treat the neighbor
An intelligent verification platform based on a structured analysis model is presented.Using an abstract model mechanism with specific signal interfaces for user callback,the unified structured analys
The orientation and correction of mural images by registering them with laser scanning data is critical for the digital protection of ancient murals.This paper proposes a method for the non-rigid regi