“数字信号尺度变换”教学案例研究——数字图像的线性和非线性缩放

Digital Image Linear and Nonlinear Zooming in Digital Signal Scaling Teaching

"数字信号的尺度变换"是信号类课程中离散信号基本运算部分的重要内容,数字图像是二维数字信号,数字图像的缩放是"数字信号尺度变换"方法的实际应用。本文将"数字信号尺度变换"的理论和实际应用相结合,详细介绍了数字图像线性缩放和非线性缩放的思路和具体步骤,展示和对比了线性缩放和非线性缩放的处理效果。教学效果显示:引入数字图像的缩放以后,"数字信号尺度变换"部分的教和学都变得简单易懂。

Digital signal scaling is an important part in Signals Processing as digital image is a two-dimensional digital signal and one of its practical applications is digital image zooming.In this paper,the linear and nonlinear zooming methods of digital images are introduced and zooming results compared.The teaching results show that introducing the digital image zooming in the teaching makes both teaching and learning easier and more impressive.