Patent ID: 6868187
Filing Date: 2005-03-15
Classification: G06T

Abstract:
1. An image transformation method comprising subjecting image data to separation processing for separating said image data into high-frequency components and low-frequency components, and subjecting said low frequency component to said separation processing and obtaining the high-frequency component and the low-frequency component of a 1-step low-frequency band, which is one step lower than said low-frequency component, and by subjecting the low-frequency component of said 1-step low-frequency band to said separation processing until the high-frequency component and the low-frequency component of a predetermined frequency band are obtained, transforming said image data into the high-frequency components and low-frequency components of a plurality of frequency bands, wherein the separation processing separates the image data or said low-frequency component into a first component and a second component arranged in a checkered pattern, and dummy-setting the signal value occurring at the hole position of said first component, corresponding to the direction of the signal change of said first component, and obtaining a dummy setting component, and obtaining the difference component between said second component and said dummy setting component as the high-frequency component, and dummy-setting and obtaining an addition dummy setting component by performing weighted addition on the signal occurring at the hole position of said high-frequency component and the signal of the surrounding vicinity thereof, and obtaining said low frequency component by adding said addition dummy setting component to said first component.