用途：数字图象处理算法的演示，包括： • 图象的DFT和逆DFT • 图象的FFT和逆FFT • 在图象中加入正弦噪声 • 图象的模板运算实现图象平滑和锐化 • 图象的直方图均衡化 • 图象的对比度拉伸 • 图象的中值滤波 • 图象灰度直方图的显示 • 若干频域滤波器 • 图象的镜像 • 图象的旋转（

Analog transmission. Analog transmission is a transmission method of conveying voice, data, image, signal or video information using a continuous signal which varies in amplitude, phase, or some other property in proportion to that of a variable. ...

Achieve a grayscale image and further control for video surveillance, Dual-line interpolation FFT harmonic analysis kaiser windows, Contains the eigenvalue and eigenvector extraction, the training sample, and the final recognition.