/* possible split in the tree */
typedef struct CvSplit
{
CvTreeCascadeNode* parent;
CvTreeCascadeNode* single_cluster;
CvTreeCascadeNode* multiple_clusters;
int num_clusters;
float single_multiple_ratio;
struct CvSplit* next;
} CvSplit;
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原文：http://blog.csdn.net/ding977921830/article/details/46722353