期刊文献+
共找到3篇文章
< 1 >
每页显示 20 50 100
佳能静止视频计算机系统
1
作者 李博 《轻工机械》 CAS 1994年第3期4-9,共6页
本文概述了一种新型的图像技术─—佳能静止视频系统(磁盘照相机系统)的主要性能、特点和应用领域,内容涉及磁盘照相机、SV系统、I0N图像获取与编辑等。
关键词 佳能 静止视频 计算机系统
下载PDF
改进的稀疏表示静止-视频人脸识别算法 被引量:4
2
作者 范哲意 曾亚军 +1 位作者 蒋姣 刘志文 《信号处理》 CSCD 北大核心 2016年第5期567-574,共8页
静止-视频人脸识别是指训练集为高质量静止图像而测试集为低质量视频序列的一种身份识别技术。针对图像对齐困难和运动模糊问题,提出了一种改进的稀疏表示静止-视频人脸识别算法。根据梯度方差信息,实现了视频条件下人脸图像中几何特征... 静止-视频人脸识别是指训练集为高质量静止图像而测试集为低质量视频序列的一种身份识别技术。针对图像对齐困难和运动模糊问题,提出了一种改进的稀疏表示静止-视频人脸识别算法。根据梯度方差信息,实现了视频条件下人脸图像中几何特征的对齐。通过对图像进行多尺度滤波操作构造字典,解决了运动模糊问题。利用图像之间的互相关系数,提取了视频序列中的关键帧。实验结果表明,提出的算法较神经网络、支持向量机等方法有明显的性能改善。 展开更多
关键词 静止-视频人脸识别 稀疏表示 人脸对齐 运动模糊 关键帧
下载PDF
Investigating Iranian Test-takers' Performance Over Taking Different Modalities of Listening Comprehension Test
3
作者 Sajad Faramarzi Atefeh Elekaei, Reza Biria 《Sino-US English Teaching》 2015年第5期327-340,共14页
Visual and pictorial materials are extensively used in teaching listening comprehension textbooks. Although the use of still image is currently implemented in some distinguished testing systems, video test is not a po... Visual and pictorial materials are extensively used in teaching listening comprehension textbooks. Although the use of still image is currently implemented in some distinguished testing systems, video test is not a popular modality due to the fact that this kind of test may result in test-takers' confusion during the test. In the present study, a sample of 80 Iranian EFL (English as a Foreign Language) students was selected to compare their performance on three different modalities of listening test: audio-only test, pictorial (listening with still image test), and visual (video) listening test. The analysis of one-way repeated measure ANOVA (Analysis of Variance) was used to compare the students' scores. The results of Bonferroni Post Hoc Test confirm that there were significant differences in scores among audio-only, pictorial, and visual tests. The results of this study highlight the greater performance of students in pictorial listening test which is statistically significant. 展开更多
关键词 visual listening test pictorial listening test test-taker performance listening assessment still imagelistening test video listening test
下载PDF
上一页 1 下一页 到第
使用帮助 返回顶部