摘要 |
A graphic contour extracting method includes: acquiring an image of a graphic form to be inspected; defining an inspection region for the image of the graphic form to be inspected by an inspection graphic form including at least one of a circle, an ellipse, a rectangle, a first rectangular graphic form, a second rectangular graphic form and a closed curved graphic form, at least one end of the first rectangular graphic form being replaced with any one of a semi-circle, a semi-ellipse and a parabola, at least one of four corners of the second rectangular graphic form being replaced with a ¼ circle or a ¼ ellipse, the closed curved graphic form being expressed by the following expression: <maths id="MATH-US-00001" num="00001"> <MATH OVERFLOW="SCROLL"> <MROW> <MROW> <MROW> <MFRAC> <MSUP> <MROW> <MO>(</MO> <MROW> <MI>x</MI> <MO>-</MO> <MSUB> <MI>x</MI> <MN>0</MN> </MSUB> </MROW> <MO>)</MO> </MROW> <MN>4</MN> </MSUP> <MSUP> <MI>a</MI> <MN>4</MN> </MSUP> </MFRAC> <MO>+</MO> <MFRAC> <MSUP> <MROW> <MO>(</MO> <MROW> <MI>y</MI> <MO>-</MO> <MSUB> <MI>y</MI> <MN>0</MN> </MSUB> </MROW> <MO>)</MO> </MROW> <MN>4</MN> </MSUP> <MSUP> <MI>b</MI> <MN>4</MN> </MSUP> </MFRAC> </MROW> <MO>=</MO> <MN>1</MN> </MROW> <MO>,</MO> </MROW> </MATH> </MATHS> and the inspection graphic form having an edge searching direction previously defined for at least one component thereof; and searching an edge of the graphic form to be inspected on the basis of the inspection graphic form to acquire contour information of the graphic form to be inspected.
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