JPH1148685A - Electronic blackbard apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To color print with high quality by reading information on a writing sheet at each color component by a reader, first processing the information of a first region on the sheet and second processing the information of a second region by a printer control means, and outputting them to a color printer. SOLUTION: A light is illuminated to a surface of a writing sheet 2 written by information by a marker or the like, and its reflected light is incident to image sensors 12. The incident light is separated into color signals of three primary colors of RGB. The respective colors are converted into multi-valued digital data by an A/D converter 13, and then output to an image processor 14. Then, positional deviations of the sensors are corrected, and the color signals of the primary colors of the RGB are output at respective pixels. The colors of the respective pixels are decided by a converter 15. The RGB signals are converted into CMYK signals processable by a color printer 17, and printed by the printer 17 via a printer controller 16. Thus, information written by markers or the like can be printed by predetermined colors without unevenness.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electronic blackboard device capable of reading information written on a board and printing the information on a recording paper, and more particularly to an electronic blackboard capable of reading and printing a plurality of colors. It concerns the device.

[0002]

2. Description of the Related Art Conventionally, an electronic blackboard device described in Japanese Patent Publication No. 62-56000 has been widely used in a conference room of a company or the like. When such an electronic blackboard device is used, the content recorded on the board at a meeting or the like can be printed as it is on plain paper or thermal paper, and there is no need to transfer it to a notebook or the like. The board of the electronic blackboard device
Since writing and erasing can be performed with a water-based marker, the recorded content on the board can be erased with an eraser after use, and the same screen can be used as a new writing surface. Further, it is possible to read not only information written by a marker but also a chart or the like attached to a board.

[0003]

However, in the above-described conventional electronic blackboard device, reading and printing are only performed in monochrome, so that information written with a marker other than black, such as red or blue, is also printed in black. There was a problem that. Also, even if a chart that uses multiple colors is read, only black-and-white printing can be performed. Correspondence was strongly desired.

[0004]

SUMMARY OF THE INVENTION In order to solve the above problems, the present invention provides a writing sheet that can be written and erased with a writing instrument, and reads information written on the writing sheet for each color component. A reading unit, a color printer that outputs information read by the reading unit to recording paper, and performs a first process on information in a first area on the writing sheet among the information read by the reading unit. Printer control means for causing the color printer to output the information to a second area on the writing sheet and to output the information to the color printer.

[0005]

Embodiments of the present invention will be described below.

FIG. 1 is a perspective view of an electronic blackboard device according to an embodiment of the present invention, wherein 1 is a housing of a blackboard main body, 2 is a writing surface provided in an opening provided in the housing 1,
A writing sheet 3 on which information can be written / erased with a water-based marker, a printer unit 3 attached to the lower part of the housing 1 and having a color printer (described later), a control unit, and the like inside;
Reference numeral 4 denotes an operation panel provided on the printer unit 3, reference numeral 5 denotes a tray provided with a marker or an eraser provided on the upper part of the printer unit 3, and reference numeral 6 denotes recording paper on which printing has been performed by the printer unit 3.

[0007] On the writing surface of the writing sheet 2, as shown in FIG.
Is set. Since the data in this area A is processed as data with gradation, even if a chart or the like is pasted, its color can be faithfully reproduced.

FIG. 2 is a block diagram of the electronic blackboard device of the present embodiment. Reference numerals 8 and 9 are driven by a motor (not shown), rollers for moving the writing sheet 2, and 10 is a light source for writing on the writing sheet 2. Light source for irradiation, 11 is light source 1
A reflection mirror for reflecting light reflected from the writing sheet 2 of light emitted from 0. A reflection mirror 12 receives light from the reflection mirror 11 and outputs electrical signals of three primary colors of R (red), G (green), and B (blue). This is a color CCD image sensor that converts the image into a color CCD image.

The information written on the writing surface of the writing sheet 2 is
As the writing sheet 2 is conveyed by the rollers 8 and 9, the writing sheet 2 is read by the light source 10, the reflection mirror 11, and the image sensor 12. The read information is converted into a signal of three primary colors of RGB and output.

FIG. 3 is a block diagram of the electronic blackboard device of the present embodiment. In the figure, reference numeral 12 denotes the above-described image sensor, 13 denotes an A / D converter for converting an analog electric signal output from the image sensor 12 into an 8-bit digital signal from analog to digital, and 14 denotes a signal from the A / D converter 13. An image processing circuit that outputs RGB color signals for each pixel based on the output, and 15 converts RGB three primary color signals output from the image processing circuit 14 into C (cyan), M (magenta),
A conversion circuit 16 converts the signals into Y (yellow) and K (black) signals. A printer control circuit 16 causes a color printer 17 to perform printing based on an output from the conversion circuit 15 using an ink jet method or the like. Color printer 17
Prints four gradations for each color of CMYK,
By combining the four colors, a total of 64 colors can be printed. Therefore, for example, the output signals (C, M,
(Y, K) is (0,0,0,4), black, (0,0,0,4)
Printing is performed in red for (4,4,0), green for (4,0,4,0), and blue for (4,4,0,0).

The operation of the electronic blackboard device of the present embodiment configured as described above will be described below.

The writing sheet 2 on which information is written with a marker or the like is transported by the rotation of the rollers 8 and 9. At that time, the light source 10 irradiates the surface of the writing sheet 2 with light, and the reflected light is incident on the image sensor 12 via the reflection mirror 11. The light incident on the image sensor 12 is decomposed into color signals of three primary colors of RGB, and A / D
After being converted into multivalued digital data for each color by the converter 13, the data is output to the image processing circuit 14. Image processing circuit 1
In step 4, the position shift of each color sensor in the image sensor 12 is corrected by delay processing or the like, and color signals of three primary colors of RGB are output for each pixel.

The conversion circuit 15 determines the color of each pixel on the basis of the output signal from the image processing circuit 14, and according to the result, an RGB signal can be processed by a color printer.
Convert to YK signal. Then, the printer control circuit 16
Then, printing is executed by the color printer 17 based on the CMYK signals output from the conversion circuit 15.

Here, the processing in the conversion circuit 15 will be described with reference to the flowchart of FIG.

First, in step 1, data of one pixel output from the image processing circuit 14 is obtained, and RGB data is obtained.
Check the level of each color signal. Then, all the levels of RGB are equal to or more than a predetermined value (for example, 150 or more when the output signal from the image processing circuit 14 is 8 bits / 256 gradations for each signal).
, The pixel is determined to be white, and the output signals (C, M,
Y, K) = (0, 0, 0, 0)
(Steps 2 and 3). Also, RGB
All levels are below a predetermined value (for example, 8b
If it is it / 256 gradations, if it is 50 or less), the pixel is determined to be black, and an output signal (C,
(M, Y, K) = (0, 0, 0, 4) is output to the printer control circuit 16 (steps 4 to 5). And
If the pixel is neither white nor black, step 6
In, it is determined whether the pixel is red, blue, or green. Specifically, the level of each signal of the three primary colors RGB is compared, and the signal with the highest level is detected. When the R signal is the maximum, the pixel is determined to be red, and the output signal (C, M, Y, K) for printing red in the printer control circuit 16 in step 7 is (0, 4, 4). , 0)
Is output. When the G signal is maximum, the pixel is determined to be green, and an output signal (C, M, Y,
K) = (4,0,4,0). Further, when the B signal is maximum, the pixel is determined to be blue, and an output signal (C, M, Y, K) = (4, 4, 0, 0) for printing blue is output.

The above processing is repeated up to the pixel immediately before the area A. As described above, since the area A is set in the writing sheet 2 in advance, the conversion circuit 15
The number of pixels subjected to the processing of Step 9 to Step 9 is counted, and after processing a predetermined amount of pixels, the subsequent data is determined to be data in the area A, and the processing of Steps 11 to 12 is performed thereafter. .

In step 11, data of one pixel output from the image processing circuit 14 is obtained.
The data of 256 gradations for each of GB is converted into data of four gradations for each of CMYK that can be processed by the color printer 17 and output to the printer control circuit 16. Step 11 to Step 12
Is repeated for all data output from the image processing circuit 14, and the information in the area A is reproduced by the color printer 17 by color printing of 64 colors.

As described above, in this embodiment, color printing can be performed in the electronic blackboard device, and information written with a marker or the like is printed in a predetermined color corresponding to the marker without unevenness, and a chart or the like is pasted. The color can be faithfully reproduced by the multicolored portion.

[0019]

According to the present invention, high-quality color printing can be performed in an electronic blackboard device according to information on a writing surface.

[Brief description of the drawings]

FIG. 1 is a perspective view of an electronic blackboard device according to an embodiment of the present invention.

FIG. 2 is a configuration diagram of an electronic blackboard device of the present embodiment.

FIG. 3 is a block diagram of an electronic blackboard device according to the embodiment;

FIG. 4 is an operation flowchart of the electronic blackboard device of the embodiment.

FIG. 5 is a front view of a writing sheet portion in the electronic blackboard device according to the embodiment.

[Explanation of symbols]

 Reference Signs List 1 housing 2 writing sheet 12 image sensor 13 A / D converter 14 image processing circuit 15 conversion circuit 16 printer control circuit 17 color printer

Claims (1)

[Claims] A writing sheet which can be written / erased by a writing instrument, a reading section for reading information written on the writing sheet for each color component, and information read by the reading section on recording paper. A color printer to be output, and among the information read by the reading unit, a first process is performed on information in a first area on the writing sheet, and the information is output to the color printer. An electronic blackboard apparatus comprising: a printer control unit that performs a second process on the area information and outputs the information to the color printer.