篮球动作数据集

主要字段
基础信息字段包括“动作名称”、“骨骼四元数”、“根节点位置坐标”、“骨骼位置坐标”、“球位置坐标”以及“动作标签”。
“动作名称”为字符串格式，写明动作的所属大类与编号（如Layup_00001），具有唯一性。
“骨骼四元数”为骨骼节点的四元数表达，四元数是旋转的一种表达方式，由一个复数i和三个实数xyz表示。
“根节点位置坐标”为根节点的位置坐标，由三个实数xyz表示。
“骨骼位置坐标”为骨骼节点的位置坐标，由三个实数xyz表示。
“球位置坐标”为篮球的位置坐标，由三个实数xyz表示，部分动作可以没有球，没有球的动作该字段数据用0填充。
“动作标签”表示该动作特性的数据化表达，例如篮板动作的标签由“篮板类型”、“球速度方向”、“篮球接球点方向”、“篮球接球点距离”、“接球时间”、“篮板接球高度”、“球员初始速度大小”、“合球时间”组成，标签均用数字表达，表示该动作在以上特性上的数值。
以上信息除了动作名称为字符串格式，其他数据均为浮点数表达，可精确到小数点10位以后。

Main Fields
The basic information fields include "Action Name", "Bone Quaternion", "Root Node Position Coordinates", "Bone Position Coordinates", "Ball Position Coordinates" and "Action Label".
"Action Name" is in string format, which specifies the action category and its serial number (e.g., Layup_00001) and is unique.
"Bone Quaternion" is the quaternion representation of bone nodes. Quaternion is a rotation representation composed of one complex unit i and three real numbers x, y, and z.
"Root Node Position Coordinates" refers to the position coordinates of the root node, represented by three real numbers x, y, and z.
"Bone Position Coordinates" refers to the position coordinates of bone nodes, represented by three real numbers x, y, and z.
"Ball Position Coordinates" refers to the position coordinates of the basketball, represented by three real numbers x, y, and z. For actions without a basketball, this field is filled with 0s.
"Action Label" represents the data-based expression of the action's characteristics. For example, the label of a rebound action consists of "Rebound Type", "Ball Velocity Direction", "Basketball Catch Point Direction", "Basketball Catch Point Distance", "Catch Time", "Rebound Catch Height", "Player Initial Velocity Magnitude", and "Ball Gathering Time". All labels are expressed using numerical values, representing the numerical values of the action corresponding to the above characteristics.
Except for the "Action Name" field which uses string format, all other data are in floating-point format with a precision of up to 10 decimal places or more.