基于结构光投影的光学三维测量与全息干涉计量都用光作为测量载体，且都要完成相位解包裹运算，所以希望将用于全息干涉计量，且在抗噪声和抗欠采样方面有优势的基于横向剪切原理的最小二乘相位解包裹算法(LSBLS)，推广到基于结构光投影的光学三维测量中。注意到前者用的是非相干光，而后者用的是相干光，以及通常实数在二象限计算相位，而复数在四象限计算相角，用合适的方法可以将基于结构光投影的光学三维测量得到的信号用一个复振幅光场表示，继而直接使用LSBLS算法解包裹相位。给出了具体的推广方法，并通过实验证明利用LSBLS算法可以得到更好的三维形貌。

The optical three-dimensional (3D) measurement by structured light projection or holographic interferometry uses light as medium requires phase unwrapping. Since least-square algorithm based lateral shearing interferometry (LSBLS) has been successfully used in holographic interferometry because of noise reduction and undersample resistance properties, it hopes that LSBLS can be used in unwrapping the phase in 3D measurement by structured light projection. It is noted that the former uses incoherent light and the latter uses coherent light, and the phase angle by real number is calculated in second quadrant and by imaginary number in forth quadrant. With the help of proper method, signal can be expressed by complex optical field and the phase unwrapping can be calculated directly by using LSBLS. A concrete method of using LSBLS is proposed, and it is proved that using LSBLS method can receive better results in three-dimensional morphology.