In a method for information processing, 3-D body polygon data is produced, a projection point of a top point is acquired by projecting each polygon patch on a projection surface and a Min-Max Box surrounding the projected whole of patch is acquired to calculate an area of the Box (step S8). 3次元物体ポリゴンデータを生成し、投影面に各ポリゴンパッチを投影し頂点の投影点を求め、投影された全ポリゴンパッチを囲むMin-Max Boxを求めその面積を算出する(ステップS8)。 - 特許庁