CAJ | 학술논문

在体绘制的光线投射算法中，需要传递函数确定体数据对光学属性的映射。体数据梯度是传递函数的常用参数。为了提高三维绘制精度，使用精确的三维 Sobel 算子进行体数据梯度幅值计算，但由于采用 Sobel 算子进行计算时计算量十分庞大，因此在计算统一设备构架（Compute Unified Device Architecture，CUDA）下对算法进行并行加速。在此基础上分析并研究了一种基于 CUDA 快速体数据梯度计算的体绘制算法，达到了梯度的实时计算。实验证明该算法能够在 PC 机上实现精确的序列图像实时体绘制。
재체회제적광선투사산법중，수요전체함수학정체수거대광학속성적영사。체수거제도시전체함수적상용삼수。위료제고삼유회제정도，사용정학적삼유 Sobel 산자진행체수거제도폭치계산，단유우채용 Sobel 산자진행계산시계산량십분방대，인차재계산통일설비구가（Compute Unified Device Architecture，CUDA）하대산법진행병행가속。재차기출상분석병연구료일충기우 CUDA 쾌속체수거제도계산적체회제산법，체도료제도적실시계산。실험증명해산법능구재 PC 궤상실현정학적서렬도상실시체회제。
In the light casting algorithm of volume rendering,the transfer function is needed to be confirmed for the mapping from volume data to optical properties.The volume gradient is a pa-rameter often used in transfer function.In order to get precise gradient amplitude,three-dimen-sional Sobel operator is used to calculate volume gradient.Due to its large amount of calculation, the algorithm is parallelly accelerated by using CUDA (Compute Unified Device Architecture).A volume rendering algorithm is analyzed and proposed based on fast gradient calculation which u-sing CUDA to achieve the real-time calculation.Experiments prove that the algorithm can be im-plemented in PC to realize real-time precise volume rendering of sequence images.