Method of compressing and decoding shape-data
First Claim
Patent Images
1. A method of compressing shape-data used in an image generating apparatus, said method comprising:
- a first step of inputting shape-data for a plurality of parts into the image generating apparatus, wherein the plurality of parts are obtained from partitioning a whole shape;
a second step of obtaining a distribution of coordinate values of the shape-data for each part and determining quantizing parameters for quantizing each coordinate value of the shape-data for each part based on the respective distribution obtained;
a third step of quantizing each coordinate value of the shape-data for each part using the quantizing parameters determined in said second step; and
a fourth step of inputting part coordinate transformation parameters, which consist of data relating to the positional relationship of the plurality of parts, into the image generating apparatus and obtaining parameters of an inverse quantizing and coordinate transformation by calculating the part coordinate transformation parameters based on inverse quantizing parameters for inverse-quantizing the coordinate values which were quantized.
1 Assignment
0 Petitions
Accused Products
Abstract
A method of compressing shape-data used for an image generating apparatus comprises steps of inputting shape-data for each part of the whole shape, seeking a distribution of coordinate values of the shape-data for each part and determining parameters for quantizing each coordinate value for each part and quantizing each coordinate value for each part based on the parameters determined in the foregoing step, and a method of decoding compressed shape-data is also disclosed.
-
Citations
19 Claims
-
1. A method of compressing shape-data used in an image generating apparatus, said method comprising:
-
a first step of inputting shape-data for a plurality of parts into the image generating apparatus, wherein the plurality of parts are obtained from partitioning a whole shape; a second step of obtaining a distribution of coordinate values of the shape-data for each part and determining quantizing parameters for quantizing each coordinate value of the shape-data for each part based on the respective distribution obtained; a third step of quantizing each coordinate value of the shape-data for each part using the quantizing parameters determined in said second step; and a fourth step of inputting part coordinate transformation parameters, which consist of data relating to the positional relationship of the plurality of parts, into the image generating apparatus and obtaining parameters of an inverse quantizing and coordinate transformation by calculating the part coordinate transformation parameters based on inverse quantizing parameters for inverse-quantizing the coordinate values which were quantized. - View Dependent Claims (2, 3, 4, 5, 6, 7)
-
-
8. A method of compressing shape-data used in an image generating apparatus, said method comprising:
-
a first step of inputting shape data for a plurality of parts into the image generating apparatus, wherein the plurality of parts are obtained from partitioning a whole shape; a second step of obtaining a distribution of coordinate values of the shape-data for each part and determining quantizing parameters for quantizing each coordinate value of the shape-data for each part based on the respective distribution obtained; and a third step of quantizing each coordinate value of the shape-data for each part using the quantizing parameters determined in said second step; wherein one set of values selected from a set of quantization widths, a set of quantization precision, and a set of a quantization width and a quantization precision is used as a parameter for inverse-quantizing the quantized coordinate values.
-
-
9. A method of compressing shape-data used in an image generating apparatus, said method comprising:
-
a first step of inputting shape data for a plurality of parts into the image generating apparatus, wherein the plurality of parts are obtained from partitioning a whole shape; a second step of obtaining a distribution of coordinate values of the shape-data for each part and determining quantizing parameters for quantizing each coordinate value of the shape-data for each part based on the respective distribution obtained; and a third step of quantizing each coordinate value of the shape-data for each part using the quantizing parameters determined in said second step; wherein the coordinates values of the shape data for each part are points of a set selected from a set of terminal points of lines, a set of middle points of lines, a set of vertices of surfaces, a set of center points of surfaces, a set of control points of surfaces, a set of center points of ellipses, and a set of center points of ellipsoids.
-
-
10. A method of decoding shape-data used in an image generating apparatus, said method comprising:
-
a first step of inputting quantized and compressed coordinate shape-data, including parameters of an inverse quantizing transformation for a plurality of parts, into the image generating apparatus, wherein the plurality of parts are obtained from partitioning a whole shape; and a second step of inverse-quantizing each coordinate of the shape-data by using the parameters of the inverse quantizing transformation; wherein, one set of values selected from a set of quantization widths, a set of quantization precision, and a set of a quantization width and a quantization precision is used as the parameters of the inverse quantizing transformation for each coordinate. - View Dependent Claims (11, 12)
-
-
13. A method of decoding shape-data used in an image generating apparatus, said method comprising:
-
a first step of inputting quantized and compressed coordinate shape-data, including parameters of an inverse quantizing transformation for a plurality of parts, into the image generating apparatus, wherein the plurality of parts are obtained from partitioning a whole shape; and a second step of inverse-quantizing each coordinate of the shape-data by using the parameters of the inverse quantizing transformation; wherein the coordinates values of the compressed shape data for each part are points of a set selected from a set of terminal points of lines, a set of middle points of lines, a set of vertices of surfaces, a set of center points of surfaces, a set of control points of surfaces, a set of center points of ellipses, and a set of center points of ellipsoids. - View Dependent Claims (14, 15)
-
-
16. A method of decoding shape-data used in an image generating apparatus, said method comprising:
-
a first step of inputting quantized and compressed coordinate shape-data, including parameters of an inverse quantizing and coordinate transformation for a plurality of parts, into the image generating apparatus, wherein the plurality of parts are obtained from partitioning a whole shape; and a second step of inverse-quantizing and coordinate transforming each coordinate of the shape-data by using the parameters of the inverse quantizing and coordinate transformation; wherein the coordinates values of the compressed shape data for each part are points of a set selected from a set of terminal points of lines, a set of middle points of lines, a set of vertices of surfaces, a set of center points of surfaces, a set of control points of surfaces, a set of center points of ellipses, and a set of center points of ellipsoids. - View Dependent Claims (17, 18, 19)
-
Specification