1. A machine vision inspection system that suppresses potential edge location measurement errors that depend on edge feature alignment, comprising: an optical portion configured to provide an image of a field of view of a workpiece; a first camera configured to provide a first image of the field of view of the workpiece; and a second camera configured to provide a second image of the field of view of the workpiece, wherein: the first camera and the second camera share a common field of view, and the first and second camera are arranged such that the orientation of the common field of view imaged in the first camera is rotated relative to the orientation of the common field of view imaged in the second camera; and the machine vision inspection system comprises signal processing which provides an edge measurement of an edge feature within the common field of view imaged by each camera and determines which of the first and second images is used as a basis for the edge measurement based on whether their respective edge orientation differs from the pixel array orientation of their associated camera by an orientation difference threshold amount.