DC polarity-changing code 直流转极电码
DC Date Code 生产日期码
DC Demand Code 请求码
dc digital code 数字代码
dc diagnostic code 诊断标准
DC signalling code 直流信号标志
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。
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.
该方法利用闭合曲线的傅立叶级数表示的直流分量和一次分量实现对闭合曲线的椭圆拟合，可以避免通常椭圆拟合方法中的矩阵求逆问题。
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