Patent ID: 8567080
Filing Date: 2013-10-29
Classification: A43D

Abstract:
1. A method of measuring and identifying foot arch type according to a consumer's footprint data, and providing suitable insoles or shoes in a short time, the method comprising: obtaining a footprint under a static standing stance, the footprint having a foot contour comprising lateral contour and medial contour; obtaining a lateral ball tangent point and a lateral heel tangent point of the footprint at points of contact between the lateral contour of the footprint and a lateral common tangent of the lateral contour of the footprint; obtaining a medial ball tangent point and a medial heel tangent point of the footprint at points of contact between the medial contour of the footprint and a medial common tangent of the medial contour of the footprint; obtaining a ball mid-point at the mid-point on a line between the lateral ball tangent point and the medial ball tangent point, and a heel mid-point at the mid-point on a line between the lateral heel tangent point and the medial heel tangent point; obtaining a foot center axial line connecting the ball mid-point and the heel mid-point, the foot center axial line contacting the foot contour at a distal forefoot point and a proximal heel point; obtaining a foot perpendicular bisector perpendicular to the foot center axial line at a foot center axial line dividing point, the foot center axial line dividing point being a mid-point between the distal forefoot point and the proximal heel point, the foot perpendicular bisector contacting the medial contour at a perpendicular bisecting the medial arch point, the foot perpendicular bisector contacting the medial common tangent at a medial common tangent point, and the foot perpendicular bisector contacting the lateral common tangent at a lateral common tangent point; obtaining the length of a foot width Lf of a line segment between the medial common tangent point and the lateral common tangent point, and obtaining the width of a foot arch La of a line segment between the perpendicular bisecting the medial arch point and the lateral common tangent point; and calculating a foot type index FTI by dividing the width of the foot arch La by the length of the foot width Lf (FTI=La/Lf), and identifying a foot arch type of the footprint by the foot type index FTI.