Image processing
First Claim
1. A method of processing data defining the values of pixels of an original coloured image represented in the spatial domain by at least two colour separations, each colour separation defining the respective colour component content of pixels arranged in a 2 dimensional array extending in X and Y directions, the method comprising performing a three dimensional transformation on said data to generate transformed data defining said original image in three dimensional frequency space, two of said three dimensions representing the variation in pixel value in said X direction and in said Y direction respectively, and wherein said transformed data has a single zero order frequency term.
2 Assignments
0 Petitions
Accused Products
Abstract
A method and apparatus for processing original data defining the values of pixels of an original colored image represented in a spatial domain by two or more color separations each color separation defining the respective color component content of pixels arranged in a two dimensional array extending in X and Y directions. The apparatus comprises a store 6 for storing the original data; and a frequency transform circuit 8 for performing a three dimensional transformation on the store representation to generate transformed data representing the original image in three dimensional frequency space. Two of the three dimensions represent the variation in pixel value in the X direction and the Y direction respectively and the transformed data has a single zero order frequency term.
90 Citations
11 Claims
- 1. A method of processing data defining the values of pixels of an original coloured image represented in the spatial domain by at least two colour separations, each colour separation defining the respective colour component content of pixels arranged in a 2 dimensional array extending in X and Y directions, the method comprising performing a three dimensional transformation on said data to generate transformed data defining said original image in three dimensional frequency space, two of said three dimensions representing the variation in pixel value in said X direction and in said Y direction respectively, and wherein said transformed data has a single zero order frequency term.
-
5. Apparatus for processing original data defining the values of pixels of an original coloured image represented in the spatial domain by at least two colour separations, each said colour separation defining the respective colour component content of pixels arranged in a 2 dimensional array extending in X and Y directions, the apparatus comprising a store- for storing said original data;
- and first processing means for performing a three dimensional transformation on said stored data to generate transformed data representing said original image in three dimensional frequency space, two of said three dimensions representing the variation in pixel value in the X direction and in the Y direction respectively, and wherein said transformed data has a single zero order frequency term.
- View Dependent Claims (6, 7, 8, 9, 10, 11)
Specification