摘要
本文对在扇形扫描B型超声设备中,由于使用数字扫描变换器而使超声图象产生伪差的条件进行分析,给出产生数字伪差的阈值。并且分析比较近年来为消除这种伪差而使用的最邻近内插、R-θ内插和均匀梯形内插三种算法的数学模型,阐述在硬件系统中实现的原则。
This paper analyses the conditions under which artifacts arise in the image because of the application of digital scan converter in ultrasonic sector scanner. The threshold value at which digital artifacts arise is given. Also, mathematical models of the three algorithms for the nearest neighbor interpolation, R-θ interpolation and uniform-ladder interpolation that have been used in recent years for eliminating artifacts are analysed and compared. The philosophy in implementing these algorithms in hardware system is elaborated.
出处
《电视技术》
北大核心
1992年第6期2-6,共5页
Video Engineering
关键词
数字式
扫描
变换器
内插算法
电视
Digital scan converter
R-θ
interpolation algorithm
Digital artifacts
