Panasonic MICRO-IMAGECHECKER PV310 Use Manual

Also see for Micro-Imagechecker PV310: Brochure & specs

108Setting CheckersChapter 6Feature DataProjection Width The width of the rectangle circumscribing around an object.Perimeter Length of border around the object. If an object is circle in shape, its perimeter refers to"circumference.Angle of PrincipalAxisThe angle that is formed when the principal axis of an object and the x axis areintersected. For rectangle-, circle- or triangle-shaped objects, the angle of the principalaxis cannot be computed. (The angle of the principal axis may be infrequently output, butyou cannot use the computed data due to its incorrectness.) In this case, the angle of theprincipal axis "180.0" is output.The detected angle of principal axis differs depending on the slope direction of the object.The slope of the principal axis rising from left to right is negative as the figure shownbelow. The slope of the principal axis falling from left to right is positive.The range of a detected theta is +/- 90 degrees. Thus, as shown in Figures A and B, the same theta value isoutput even if rotational angles of the objects are different.