Patent ID: 7574034
Filing Date: 2009-08-11
Classification: G01N,G06T

Abstract:
1. A method for quantitatively evaluating a graphite structure of a gray cast iron by an image analysis apparatus, comprising the steps of using the image analysis apparatus to perform the steps of: analyzing a magnified image of the graphite structure to extract non-spherical graphite pieces having sizes within a first range, contained in the graphite structure to calculate a number of the extracted non-spherical graphite pieces; calculating a thick and thin degree expressing a representative degree of thickness of the non-spherical graphite pieces including measuring a maximum length and an area of each of the non-spherical graphite pieces having maximum lengths within a second range, included in the extracted non-spherical graphite pieces, determining an area of a non-spherical piece having a median value of the maximum lengths within the second range depending on the calculated maximum lengths and the areas, and dividing the determined area by the median value to obtain the thick and thin degree; and outputting the calculated number and the thick and thin degree of the non-spherical graphite pieces in combination as an evaluation result.