Tire earth image analytical manner, the tire earth image analytical device and the procedure which acquires the tire earth

摘要

PPROBLEM TO BE SOLVED: To provide a tire grounding image analyzing method, a tire grounding image analyzing device and a tire grounding image analyzing program capable of shortening the computing time for obtaining tire grounding shape, reducing quantity of computing, and reducing quantity of data about obtained tire grounding shape. PSOLUTION: The tire grounding image data 10 are obtained. An optional coordinate (center point A) within a tire grounding shape (tire grounding ground 11) is decided based on the obtained tire grounding image data 10. A cross point of a straight line L extended from the optional coordinate (center point A) per each sample angle θ and an outline of the tire grounding shape is obtained. An approximate functional value of the outline 20 of the tire grounding shape (tire grounding ground 11) is obtained on the basis of the sample angle θ and length of the straight line L from the optional coordinate (center point A) to the obtained cross point, and a grounding shape function 40 is thereby obtained. PCOPYRIGHT: (C)2005,JPO&NCIPI