Method of and system for image processing and recording medium for carrying out the method
AssigneeFuji Photo Film Co., Ltd.
InventorMasahiko Yamada
Life of this patent
Estimating the term…
Abstract
In an image processing method for obtaining a processed image signal from an original image signal representing an original image having a certain picture element density, a plurality of intermediate image signals which are different in frequency band are made on the basis of the original image signal. A plurality of transformed image signals are obtained by carrying out a transformation processing on the respective intermediate image signals on the basis of respective transformation functions, and a processed image signal is obtained from the transformed image signals. The transformation functions are defined by determining transformation function defining parameters for the transformation functions on the basis of the picture element density of the original image.
Claims42
An image processing method for obtaining a processed image signal from an original image signal representing an original image having a certain picture element density, in which
- a plurality of intermediate image signals which are different in frequency band are made on the basis of the original image signal, a plurality of transformed image signals are obtained by carrying out a transformation processing on the respective intermediate image signals on the basis of respective transformation functions, and a processed image signal is obtained from the transformed image signals, wherein
- the image processing method comprises defining said transformation functions by determining transformation function defining parameters for the transformation functions on the basis of the picture element density of the original image, and different parameters are defined in accordance with different picture element densities of the original image signal.
An image processing system for obtaining a processed image signal from an original image signal representing an original image having a certain picture element density comprising
- an intermediate image signal making means which makes a plurality of intermediate image signals which are different in frequency band on the basis of the original image signal, and
- a transformation means which obtains a plurality of transformed image signals by carrying out a transformation processing on the respective intermediate image signals on the basis of respective transformation functions, and obtains a processed image signal from the transformed image signals, wherein the image processing system further comprises
- a transformation function defining means which determines transformation function defining parameters for the transformation functions on the basis of the picture element density of the original image and defines the transformation functions, and different parameters are defined in accordance with different picture element densities of the original image signal.
A computer-readable recording medium loaded with a program for causing a computer to perform an image processing method for obtaining a processed image signal from an original image signal representing an original image having a certain picture element density in which
- a plurality of intermediate image signals which are different in frequency band are made on the basis of the original image, a plurality of transformed image signals are obtained by carrying out a transformation processing on the respective intermediate image signals on the basis of respective transformation functions, and a processed image signal is obtained from the transformed image signals, wherein the program further includes
- defining said transformation functions by determining transformation function defining parameters for the transformation functions on the basis of the picture element density of the original image, and different parameters are defined in accordance with different picture element densities of the original image signal.
An image processing method for obtaining a processed image signal from an original image signal representing an original image having a certain picture element density, in which
- a plurality of intermediate image signals which are different in frequency band are made on the basis of the original image signal, a plurality of transformed image signals are obtained by carrying out a transformation processing on the respective intermediate image signals on the basis of respective transformation functions, and a processed image signal is obtained from the transformed image signals, wherein
- the image processing method comprises defining said transformation functions by determining transformation function defining parameters for the transformation functions on the basis of the picture element density of the original image, whereby said parameters are defined for different picture element densities of the original image signal so that substantially constant frequency response characteristics of the processed image signal are obtained.
An image processing system for obtaining a processed image signal from an original image signal representing an original image having a certain picture element density comprising
- an intermediate image signal making means which makes a plurality of intermediate image signals which are different in frequency band on the basis of the original image signal, and
- a transformation means which obtains a plurality of transformed image signals by carrying out a transformation processing on the respective intermediate image signals on the basis of respective transformation functions, and obtains a processed image signal from the transformed image signals, wherein the image processing system further comprises
- a transformation function defining means which determines transformation function defining parameters for the transformation functions on the basis of the picture element density of the original image and defines the transformation functions, whereby said parameters are defined for different picture element densities of the original image signal so that substantially constant frequency response characteristics of the processed image signal are obtained.
A computer-readable recording medium loaded with a program for causing a computer to perform an image processing method for obtaining a processed image signal from an original image signal representing an original image having a certain picture element density in which
- a plurality of intermediate image signals which are different in frequency band are made on the basis of the original image, a plurality of transformed image signals are obtained by carrying out a transformation processing on the respective intermediate image signals on the basis of respective transformation functions, and a processed image signal is obtained from the transformed image signals, wherein the program further includes
- defining said transformation functions by determining transformation function defining parameters for the transformation functions on the basis of the picture element density of the original image, whereby said parameters are defined for different picture element densities of the original image signal so that substantially constant frequency response characteristics of the processed image signal are obtained.
Dependencies are inferred from the claim text.