1. A method of validating a manufacturing tolerance of a structure, comprising: receiving a digital image of a cross-section of the structure at an interface of a computing device; identifying, by the computing device, an outer boundary of the structure from the digital image; selecting, by the computing device, one or more regions of the outer boundary based on changes in a first derivative or a second derivative of one or more points of the outer boundary; identifying a geometry feature of the one or more regions of the outer boundary by processing a slope of the outer boundary to identify the changes in the first derivative and comparing to stored templates of geometry features of the structure; making a comparison, by the computing device, of the geometry feature of the one or more regions of the outer boundary to a manufacturing specification for a corresponding portion of the structure; and determining, by the computing device, whether the structure is within a manufacturing tolerance based on the comparison of the geometry feature to the manufacturing specification.