One thing that we want to be true in this definition is, if ( x , σ ) {\displaystyle (\mathbf {x} ,\sigma )} is a point on this ridge, then the value of the function at the point is maximal in the scale dimension.
其中我們想要以下的條件為真，若 ( x , σ ) {\displaystyle (\mathbf {x} ,\sigma )} 是一個在最大尺度脊上的點，則函數在這個點上的值在尺度軸上是極大值。