基于Matlab的数字扫描变换器设计

Design of digital scan converter based on Matlab

描述了数字扫描变换器设计的两种算法结构,即正查数据地址法和倒查数据地址法,采用两种算法来实现扇形扫描的数字扫描变换器中的坐标变换和数据插补,给出相应的Matlab实现程序。实验结果表明,正查数据地址法实现了一维插补,倒查数据地址法实现了二维平面插补,得到的图像都达到预期的效果。

For getting good quality images with the sector scan mode,the digital scan converter is indispensable part to Bscanner,which is a very important tool of medical ultrasonic imaging. Two kinds of major algorithms to achieve transformation of coordinates and interpolation of the missing data in design of digital scan converter are described,which are positive and opposite methods for querying data address respectively. The corresponding Matlab program for realizing both the two algorithms is given. The experimental result shows that the positive method for querying data address can implement the 1 dimensional interpolation,and the opposite method for querying data address can realize the 2dimensional plane interpolation. The consequent images have achieved the desired effect.