The input video is now fixed at a stable DC level where the blank level is set to a known ADC code.
现在，输入视频固定在稳定的直流电平，消隐电平则设定为已知的ADC代码。
2
The method USES the DC component and the first harmonic of a curve's chain code expressed by Fourier series to fit the curve, avoiding the inverse calculation of an array used in general methods.