A new shot boundary detection system based on a unique classifying method was proposed. The pixel matched
difference algorithm was improved and two new features: pixel similarity degree and pixel mean difference were
proposed. Also a new classifying method for shot boundary transition, including cut, fade out or in, short gradual
transition, long gradual transition and other gradual transition was proposed. These improved features showed good
performance in the detection; the algorithm based on classifying method traded off well between performance and cost,
both of which were proved by the experiment.