KR19990046228A - Closed loop printing color correction device and method - Google Patents

Abstract

The present invention relates to a method of printing color information input through a scanner as a printer, the method comprising: storing colors to be printed; Printing the stored printing colors as a printer; Scanning the printed color as a scanner and storing the scanned colors in correspondence with the colors for printing; Scanning the selected predetermined colors as a scanner; And printing, as the printer, a printing color corresponding to the scanned color.

Description

Closed loop printing color correction device and method

The present invention relates to an apparatus for printing the color of printed matter scanned through a scanner to a printer, and more particularly, closed-loop printing color correction for correcting the color of the printed matter printed by the printer to a closed loop type. An apparatus and method are provided.

With the development of computer technology, various functions necessary for real life are performed by a computer, and one of these functions is a function that allows a scanner and a printer to copy prints composed of multiple colors onto multiple printer papers. . In such a function, it is important to accurately represent the color of the printed matter scanned by the scanner on the printing paper, but in the conventional printer, there is a problem that the color of the printed matter that is scanned cannot be accurately represented on the printing paper.

That is, since the color printed by the printer on the paper is expressed differently according to the model of the printer, the component of the printing ink, the type of paper, and the like, even if the computer accurately transmits the color information of the printed matter scanned by the scanner to the printer, The problem arises that the printer cannot accurately print the colors of the original prints scanned.

SUMMARY OF THE INVENTION The present invention has been made to solve such a problem, and an object of the present invention is to provide a closed loop printing color correction apparatus capable of completely reproducing the color of the scanned original prints with a printer.

Another object of the present invention is to provide a closed loop printing color correction method capable of completely reproducing a color of a scanned original print as a printer.

In order to achieve the above object, the present invention provides a method of printing color information input through a scanner as a printer, the method comprising: storing colors to be printed; Printing the stored printing colors as a printer; Scanning the printed color as a scanner and storing the scanned colors in correspondence with the colors for printing; Scanning the selected predetermined colors as a scanner; And printing, as a printer, a printing color corresponding to the scanned color.

The present invention also provides an apparatus for printing color information input through a scanner as a printer, comprising: a first memory for storing color information to be printed on a printer; A second memory for storing the color information, the color of which is printed according to the color information stored in the first memory, scanned by the scanner, corresponding to the color information of the first memory; When predetermined color information is input from the scanner, the printer searches the color information of the second memory corresponding to the input color information, and controls the printer to print the color information of the first memory corresponding to the color information of the found second memory. It has a processor.

1 is a schematic block diagram of a closed loop printing color correction device according to the present invention;

2 is a flow chart of a closed loop printing color correction method according to the present invention;

3 is a view showing color paper used in a closed loop printing color correction device and method according to the present invention;

<Description of the symbols for the main parts of the drawings>

10: scanner 30: printer

50: computer 51: processor

53, 55: memory 57: input device

Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

1 is a schematic block diagram of an apparatus according to the present invention, where 10 denotes a general scanner and 30 denotes a printer. The scanner 10 and the printer 30 are connected to the computer 50, and the processor 50 includes a processor 51, two memories 53 and 55, and an input device 57. Here, the input device 57 is composed of a keyboard or the like and includes all means capable of inputting predetermined information or inputting commands into the computer 50.

2 shows an operation flowchart for printing an original printed matter on a printer 30 using the apparatus having the above-described configuration.

First, the computer operator inputs color information for a predetermined color into the memory 53 using the input device 57 (S1). Here, since the color can be generally expressed as three primary colors of red (R), green (G), and blue (B), the values of R, G, and B (or C, M, Y, and K) for each color may be used. And the color elements may be changed as needed.) Is stored in the memory 53.

Thereafter, the computer operator uses the computer 50 to print the color in the memory 53 to the printer 30 on a predetermined sheet (S2). Thus, a color corresponding to the color in the memory 53 will be printed on the predetermined paper. Here, in theory, the color value stored in the memory 53 and the color value printed on the paper should match, but as described above, the storage color and the printed color do not match according to the type of printer and the nature of the paper. This problem is solved by subsequent operation. That is, the computer operator controls the computer 50 to scan the color printed on a predetermined sheet with the scanner 10 (S3), and the scanned color is stored in the memory 55 under the control of the processor 51 ( S4).

Accordingly, the values for the predetermined colors stored in the memories 53 and 55 may be different from each other. However, using this information, accurate printing may be performed on the colors stored in the storage 53. That is, when printing the predetermined color scanned by the scanner 10 as the printer 30 (S5), if the color is a value stored in the storage unit 55, the color stored in the storage unit 53 When printing as the printer 30 (S6), the scanned original color and the printing color will match each other.

In the above description, only one color is stored in the storage unit 53 by using the input device in step S1, but this is for convenience of description and substantially stores a plurality of colors in the storage unit 53. After these colors have been printed, the colors scanned in step S2 will also have to be stored in the memory 55. In addition, it will be readily apparent to those skilled in the art that the colors in the memories 53 and 55 correspond to each other, that is, to correspond to each other by a stored value (printing value) and a scanning value.

On the other hand, it is very inconvenient for the operator to store a plurality of colors in the storage unit 53 through the input device 57 as described above.

In order to solve this inconvenience, the present inventors have developed a method as follows. That is, as shown in FIG. (Hereinafter referred to as color paper) (P). By scanning the color paper P with the scanner 10 and storing the colors for the color gamuts C1-Cn of the scanned color paper in the memory 53, a plurality of colors can be easily stored in the memory 53. ) Can be stored. In this case, by printing the colors stored in the memory 53 on one sheet (corresponding to the colored sheet) as the printer 30, and scanning the printed sheet again as the scanner 10, the color section in the colored sheet P ( Colors for C1-Cn) can simply be stored in memory 55, thereby making it easy to correlate color values in memory 53 with printed color values in memory 55.

On the other hand, although there is a limit to the color gamut that can be formed in one color paper, it can be seen that the number of colors is not limited. That is, it is preferable to configure the color paper P having all the number information of color information that can be expressed, and to store these color information in the memories 53 and 55, but this is practically impossible. The present inventors have found that the solution is possible by using a general interpolation method while trying to solve this problem.

That is, only the values for representative colors in the memory 53 and 55 are primarily stored, and intermediate values between the color values of the memory 55 are generated by interpolation and stored in the memory 55. The memory 53 may also generate and store interpolated color values corresponding to the interpolated color values in the memory 55 generated by interpolation. The memory 53 and 55 may store information on a plurality of colors by the interpolation method. Can be stored quickly.

On the other hand, as can be seen from the above description, the present invention can accurately print the scanned color only for the same printing ink and printing paper, and when the printing ink and the printing paper are changed, the scanned color and the printed paper are changed. Color differences may occur. This problem can be solved by installing a plurality of memories 53 for each printing ink and paper, and selecting the corresponding memory 53 whenever the printing ink and paper are changed.

As described above, the present invention stores the color to be printed through the printer in the first memory, scans the color printed by the color stored in the first memory, stores it in the second memory, and then inputs a predetermined color by the scanner. By printing the color stored in the first memory as a printer corresponding to the color, the same color as the scanned color can be printed.

Claims (5)

As a method of printing color information input through a scanner as a printer, Storing the colors to be printed; Printing the stored printing colors as the printer; Scanning the printed color as the scanner and storing the scanned colors in correspondence with the printing color; Scanning the selected predetermined colors as the scanner; And printing the printing color corresponding to the scanned color as the printer. The method of claim 1, wherein the storing of the colors to be printed comprises: A closed loop printing color correction method of scanning color paper having different colors colored by color sections, and storing color information of the scanned color sections as the colors to be printed. The method according to claim 1 or 2, And storing the stored printing color and the scanned colors primarily in predetermined representative colors, and detecting and storing a plurality of colors by interpolation between the representative colors. The method of claim 3, wherein storing the colors to be printed comprises: Stored in accordance with the printing ink and paper used in the printer, respectively, The printing of the printing color corresponding to the scanned color as the printer may include: The closed-loop printing color correction method of selecting and printing the printing color according to the printing ink and paper to the printer. A device for printing color information input through a scanner as a printer A first memory for storing color information to be printed to the printer; A second memory configured to store color information, which has been printed according to color information stored in the first memory, scanned by the scanner in correspondence with color information of the first memory; When predetermined color information is input from the scanner, color information of the second memory corresponding to the input color information is searched for, and color information of the first memory corresponding to the color information of the searched second memory is sent to the printer. A closed loop printing color correction device having a processor for controlling the printing.