US 2004/0201696 A1 · Method, apparatus, and recording medium for image correction

Abstract

Color reproducibility of a proof print agrees with color reproducibility of a print generated at a laboratory. Image data obtained by a user with a digital camera are printed by a printer to generate a proof print. The proof print is read by reading means in a laboratory and scanned image data are obtained. The scanned image data are converted into a Lab color space by first conversion means, and converted scanned image data are generated. A relationship between data values of original image data and the converted scanned image data is calculated as a look-up table by calculation means. Second conversion means converts the original image data based on the look-up table, and obtains converted original image data. Third conversion means converts the converted original image data into print image data, and printing means generates a print by printing the print image data.

Claims18

Dependent claims

An image correction method comprising the steps of:

obtaining scanned image data by photoelectrically reading a proof print obtained from original image data representing an original image;
carrying out a first color conversion for obtaining converted scanned image data by converting the scanned image data into a common color space corresponding to color perception;
calculating a relationship between data values of the converted scanned image data and data values of the original image data as a color correspondence relationship;
carrying out a second color conversion for obtaining converted original image data by converting the original image data into the common color space based on the color correspondence relationship;
carrying out a third color conversion for obtaining print image data by converting the converted original image data from the common color space into a color space for printing;
and
obtaining a print based on the print image data.

4 more elements

An image correction method comprising:

obtaining scanned image data and ID information by photoelectrically reading a proof print obtained from original image data representing an original image, the ID information added inseparably to the proof print for identifying the original image;
carrying out a first color conversion for obtaining converted scanned image data by converting the scanned image data into a common color space corresponding to color perception;
reading equivalent original image data representing an equivalent original image corresponding to the obtained ID information from storage means storing a plurality of original image data sets in relation to ID information;
calculating a relationship between data values of the converted scanned image data and the equivalent original image data as a color correspondence relationship;
carrying out a second color conversion for obtaining converted original image data by converting the equivalent original image data into the common color space based on the color correspondence relationship;
carrying out a third color conversion for obtaining print image data by converting the converted original image data from the common color space into a color space for printing;
and
obtaining a print based on the print image data.

5 more elements

An image correction apparatus comprising:

image reading means for obtaining scanned image data and ID information by photoelectrically reading a proof print obtained from original image data representing an original image, the ID information added inseparably to the proof print for identifying the original image;
storage means for storing a plurality of original image data sets related to ID information;
first color conversion means for obtaining converted scanned image data by converting the scanned image data into a common color space corresponding to color perception;
reading means for reading equivalent original image data representing an equivalent original image corresponding to the obtained ID information from the storage means;
calculation means for calculating a relationship between data values of the converted scanned image data and the equivalent original image data as a color correspondence relationship;
second color conversion means for obtaining converted original image data by converting the equivalent original image data into the common color space based on the color correspondence relationship;
third color conversion means for obtaining print image data by converting the converted original image data from the common color space into a color space for printing;
and
printing means for obtaining a print based on the print image data.

6 more elements

A computer-readable recording medium storing a program to cause a computer to execute an image correction method, the program comprising the procedures of:

obtaining scanned image data by photoelectrically reading a proof print generated from original image data representing an original image;
carrying out a first color conversion for obtaining converted scanned image data by converting the scanned image data into a common color space corresponding to color perception;
calculating a relationship between data values of the converted scanned image data and data values of the original image data as a color correspondence relationship;
carrying out a second color conversion for obtaining converted original image data by converting the original image data into the common color space based on the color correspondence relationship;
carrying out a third color conversion for obtaining print image data by converting the converted original image data from the common color space into a color space for printing;
and
obtaining a print based on the print image data.