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Method, apparatus, and recording medium for image correction

a technology for recording media and image correction, applied in the field of method, apparatus, and recording media for image correction, can solve the problems of color reproducibility becoming completely different between prints, color reproducibility not being completely compatible between photographic prints and proof prints, and photographic prints not being able to reflect the result of image processing

Inactive Publication Date: 2005-10-27
FUJIFILM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This method ensures that the printed image has high fidelity to the color reproducibility of the proof print, maintaining consistent color accuracy even when using different printing apparatus and conditions, thereby improving productivity and image quality.

Problems solved by technology

However, color reproducibility becomes completely different between prints obtained by using a household printing apparatus and by a printing apparatus in a laboratory, due to differences in color processing methods and coloring characteristics of color materials and / or recording methods employed by these printing apparatus.
Therefore, even if the method described in U.S. Pat. No. 5,189,511 or 5,668,596 is used, color reproducibility does not agree completely between the photographic print and the proof print.
As a result, even if the user carries out various kinds of image processing on the image data by using his / her personal computer so as to obtain desirable color reproducibility, the photographic print cannot reflect a result of the image processing, due to the differences in the methods of the color processing and the like.
However, the color profiles corresponding to all the printing conditions are not necessarily available for the household printing apparatus.
Furthermore, even if the color profiles are available, specifying a color profile corresponding to an individual printing condition is difficult in some cases.
Therefore, the printing apparatus in the laboratory may not read the color profiles of the household printing apparatus.
Therefore, even if the color profiles are available, the color reproducibility does not agree between the photographic print generated by the laboratory and the proof print.
However, causing the color reproducibility of the prints to agree completely is extremely difficult, and an operator of the laboratory may not be skilled enough.
In the case where additional printing is requested from a laboratory different from the laboratory that has generated the first prints, the same problem occurs, since printing apparatus generally vary in each laboratory.
However, the method described in Japanese Unexamined Patent Publication No. 7(1995)-254988 contains factors causing image quality degradation, such as defocus and flare of an optical system in a scanner, and degradation and noise of an imaging device upon sampling.
Furthermore, a print to be read tends to have a scar and a stain such as fingerprints, and colors degrade due to fading and alteration with time.
Therefore, quality of a photographic print generated according to this method becomes lower.

Method used

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  • Method, apparatus, and recording medium for image correction
  • Method, apparatus, and recording medium for image correction
  • Method, apparatus, and recording medium for image correction

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Experimental program
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first embodiment

[0096]FIG. 1 is a block diagram showing a configuration of an image output system adopting an image correction apparatus as the present invention. As shown in FIG. 1, the image output system in this embodiment exchanges data and a print between a user 1 and a laboratory 2. The user 1 obtains original image data S0 by using a digital camera (DSC) 11, and generates processed original image data S1 by carrying out various kinds of image processing on the original image data S0 by using a personal computer 12. The user 1 obtains a proof print TP having desired colors by using a household printer 13 such as an ink jet printer. The original image data S0 may be obtained by reading an original image such as a photographic film with a scanner. In this embodiment, the original image data S0 comprise R0, G0, and B0 color data while the processed original image data S1 comprise R1, G1, and B1 color data. The user 1 may record the processed original image data S1 in a recording medium such as a...

second embodiment

[0122] As has been described above, in the second embodiment, the print P1 having the same color reproducibility as the print P0 can be obtained at the time of additional printing, even if the printing condition is not the same as at the time of generating the print P0.

[0123] In the second embodiment, the print P0 is selected from the prints Ps generated by the laboratory 2. However, a print P0′ for additional printing may be selected from prints Ps′ generated by a laboratory other than the laboratory 2, and only additional printing may be requested from the laboratory 2. In this case, original image data S1 are not stored in the laboratory 2. Therefore, the user 1 may provide the original image data S1 to the laboratory 2. Alternatively, the laboratory 2 may be connected to the laboratory that generated the prints Ps′ via a network and the original image data S1 are read by the laboratory 2 by accessing an image database of the laboratory that generated P0′. In this manner, a print...

third embodiment

[0125] In the third embodiment, the image data obtained by the reading means 21 and first conversion means 22 are called the scanned image data S6 (R6, G6, B6) and converted scanned image data S6′ (L6, a6, b6), respectively. Image data obtained by second conversion means 24 through conversion of the original image data S5 are called converted original image data S5′ (L5, a5, b5) and image data obtained by third conversion means 25 are called print image data S7 (R7, G7, B7).

[0126] The embedding means 15 secretly embeds the ID information H in the original picture data S0, and obtains the original image data S4 having the ID information H embedded therein. Hereinafter, how the ID information H is embedded by the embedding means 15 will be explained. An original image (hereinafter called S0) represented by the original image data S0 is an image comprising m×n pixels of 8-bit RGB data. First, subplanes SB each comprising p×q pixels (p0. The number of the subplanes SB in the original im...

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PUM

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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.

Description

BACKGROUND OF THE INVENTION [0001] 1. Field of the Invention [0002] The present invention relates to a method and an apparatus for correcting original image data representing an original image upon printing thereof. The present invention also relates to a computer-readable recording medium storing a program to cause a computer to execute the image correction method. [0003] 2. Description of the Related Art [0004] When a user requests photographic printing of image data obtained by a digital camera from a laboratory, the user confirms the content of an image by printing the image data as a proof print with a household printing apparatus such as an ink jet printer. Upon requesting the printing, the image data are provided to the laboratory together with order information for requesting the printing, via a network or by being recorded in a recording medium. In the laboratory, a photographic print of the image data is generated based on the order information. At this time, in order to c...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): B41J5/30B41J2/525G03F3/08G06K9/00G06T1/00H04N1/387H04N1/40H04N1/46H04N1/56H04N1/60H04N23/40
CPCH04N1/6055H04N23/40
Inventor YODA, AKIRA
Owner FUJIFILM CORP