Toyota Jidosha Kabushiki Kaisha

Junji Ishida

Atsushi Takagi

Kazuyuki Hattori

Daisuke Iwamoto

Hitoshi Misawa

Tadashi Kotani

Takaya Hashimoto

A units of red {u-u}, B units of green {v-v} and C units of blue {w-w} are sampled and measurements are performed, and an interpolation equation is found from the A&#xd7;B&#xd7;C units of data in three-dimensions (L*, a*, b*) that are obtained. Firstly, A units of point sequence data in 3&#xd7;B&#xd7;C dimensions are least squares approximated for the parameters u, and Mu control points in 3&#xd7;B&#xd7;C dimensions are found. Then, B units of point sequence data in 3&#xd7;C&#xd7;Mu dimensions are least squares approximated for the parameters v, and Mv control points in 3&#xd7;C&#xd7;Mu dimensions are found. Next, C units of point sequence data in 3&#xd7;Mu&#xd7;Mv dimensions are least squares approximated for the parameters w, and Mw control points in 3&#xd7;Mu&#xd7;Mv dimensions are found. Then, output values (L*,a*,b*) corresponding to arbitrary input values (Red,Green,Blue) can be obtained by an interpolation equation according to Mu&#xd7;Mv&#xd7;Mw final control points in three dimensions and basis functions used in the least squares approximations.

Color reproduction method using B-spline approximation

A three-dimensional model modification system for modifying a three-dimensional model, defined by a plurality of surfaces and representing an arbitrary object is disclosed. The system includes a base-curve generating unit fitting skeleton lines, representing a prerecorded approximate outline of the object, to a three-dimensional model to be modified and generating base curves, representing an approximate outline of the three-dimensional model; a first polygon forming unit generating a group of points from the three-dimensional model; a base-curve modifying unit arbitrarily modifying the base curves of the three-dimensional model, according to an instruction from an operator; a group-of-points displacing/determining unit displacing the group of points based on base curve displacements from the base curves before arbitral modification to the base curves after arbitrary modification; and a second polygon forming unit generating a three-dimensional model defined by a plurality of surfaces formed from the group of points.

Three-dimensional model deformation system, method and computer readable program, and computer readable storage medium storing that program

Growing community of inventors

Nagoya, Japan

Junji Ishida