The application of Lagrange interpolation to extract the black line tracing

To MC9S12XS128 MCU as the core of the acquisition system, to realize date collection of the black-and-white television signals and identification of the black guide lines, at introducing acquisition system, The paper expounds Lagrange interpolation algorithm in the black line acquisition of process with fewer images stored records can fit track line, not only shorten the extraction time, but also have a good foresight of the track’s trend.