1. A non-contact method for inspecting an object comprising, in any suitable order: i) obtaining at least one first image of the object on which an optical pattern is projected, taken from a first perspective; ii) obtaining at least one second image of the object on which an optical pattern is projected, taken from a second perspective that is different to the first perspective; and iii) identifying at least one common object feature in each of the at least one first and second images on the basis of an irregularity in the optical pattern as imaged in the at least one first and second images.