Sift算子最早是由D.G.Lowe于1999年提出的，当时主要用于对象识别。

2004年D.G.Lowe对该算子做了全面的总结，并正式提出了一种基于尺度空间的、对图像缩放、旋转甚至仿射变换保持不变性的图像局部特征描述算子sift（Scale Invariant Feature Transform)算子，即尺度不变特征变换。-Sift child the first count by DGLowe in 1999, was mainly used for object recognition.

Years DGLowe of the operator to do a comprehensive summary of, and formally proposed a scale space-based, image scaling, rotation, or even maintain the invariance of the affine transformation image characterization operator sift (the Scale Invariant Feature the Transform ) operator, ie, scale invariant feature transform