摘要
在分析欠采样噪声机理的基础上 ,针对大多数采样成像设备中存在的带内和带外的欠采样噪声 ,使设备性能下降的问题 ,建立了欠采样噪声的数学模型和应用分析模型。研究了图像捕捉系统中 ,欠采样噪声与系统设计参数的关系 ,给出计算机仿真结果。讨论了消除欠采样噪声的途径。
In band and out of band aliasing noise exist in sampled imaging system, which degrade the performance of equipment.Focusing on this problem,mechanism of aliasing effects is analyzed. Application oriented model is proposed. The relationship between aliasing noise and system design parameters is examined. Several computer simulation results are given. The way to reduce aliasing noise is discussed.
出处
《吉林大学学报(信息科学版)》
CAS
2002年第1期26-29,共4页
Journal of Jilin University(Information Science Edition)
基金
国防重点科技基金资助项目
关键词
信息论
熵
欠采样噪声
阵列撂测器
空间频率响应
Information theory
Entropy
Aliasing noise
Detector array
Spatial frequency response