JP3285998B2 - Color facsimile machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a color facsimile apparatus for reading a color original and transmitting color image data, and more particularly to a color facsimile apparatus for performing fine correction and adjustment on color image data.

[0002]

2. Description of the Related Art In a device that performs full color output,
In order to reproduce the original colors as faithfully as possible, it is necessary to make subtle corrections and adjustments to the color image data. For example,
In the case of a digital color copier, an image read by a specific scanner is output by a specific printer, so that a specific value of correction and adjustment (hereinafter, referred to as a correction coefficient) generally needs to be prepared. That is, one type of correction coefficient considering both the scanner and the printer may be prepared. Also,
Even in the case of a color facsimile machine, if the communication partner is the same machine as the own machine, the characteristics of the scanner and the print become almost the same. When transmitting, the printer on the receiving side can perform substantially the same printing as when printing on its own printer.

[0003]

However, according to the conventional color facsimile apparatus, when the communication partner is a different apparatus from its own apparatus, the correction coefficient in each correction and adjustment is different, so that the receiving side performs the processing. There is a problem that the correction and adjustment performed may cause the color balance of the color image data to be lost, in other words, the original color of the color image data may not be reproduced.

The present invention has been made in view of the above, and has as its object to improve the reproducibility of color of color image data even in communication between devices of different models.

[0005]

The present invention SUMMARY OF THE INVENTION To achieve the above object, a determination unit for communication partner to determine the discrimination and the document type of whether the same type as its own device, color image Image processing means for performing image processing for adjusting the color balance of data, and a model of the communication partner by the determination means
And based on the determination result of the type of the document, the through
If the model of the other party and the model of the own machine are the same,
Select an image processing parameter specific to the machine and
If the model of the other party is different from the model of the
Image processing parameters are selected, and the contents of the image processing to be executed by the image processing means are selected.
Optimal according to the type of the document among image processing parameters
It is to provide a color facsimile apparatus characterized by comprising an image processing changing means for changing the image processing using the image processing parameters.

[0006] In order the present invention to achieve the above object, an image processing unit for performing image processing to adjust the color balance of the color image data, at the time of transmission, the color for the image processing performed by the image processing unit The processing information is added to the protocol signal and transmitted, and at the time of reception , according to the color processing information applied on the transmission side added to the protocol signal.
The image processing means is configured to determine the color of the color image data;
Apply image processing to optimize the balance
And a control means for controlling the color facsimile apparatus.

[0007]

The color facsimile apparatus of the present invention determines whether or not the communication partner is the same model as its own apparatus, and changes the content of the image processing for adjusting the color balance of the color image data based on the determination result. .

In the color facsimile apparatus of the present invention, the content of the image processing for adjusting the color balance of the color image data is added to the protocol signal and transmitted at the time of transmission.
At the time of reception, the content of the image processing for adjusting the color balance of the color image data is changed and executed based on the content of the image processing performed on the transmission side added to the protocol signal.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a color facsimile apparatus of the present invention will be described in detail in the order of [Embodiment 1] and [Embodiment 2] with reference to the drawings.

[First Embodiment] FIG. 1 is a block diagram showing a configuration of a first embodiment.
ork control unit) 101, a modem 102 that modulates a transmission signal and demodulates a reception signal, an encoding / decoding unit 103 that encodes transmission data and decodes reception data, and instructs a user to start transmission. And an operation panel 104 for selecting an operation mode and an operation mode, and an image input unit 105 for optically reading a document image to be transmitted, performing each of photoelectric conversion and A / D conversion, and outputting digital data.
And an image processing unit 106 for performing various corrections and conversions on the color image data using parameter data stored in a ROM 108 described later, and Y (yellow), M
(Magenta) and C (Cyan)
An image output unit 107 for printing the received color image data on recording paper and outputting the same, and stores a control program for the entire apparatus, parameter data such as correction coefficients and table data, and other data (data used for image processing). And a CPU 10 that controls the above-described units based on a control program stored in the ROM 108.
9 and a RAM 109 used by the CPU 109 for temporarily storing or reading data. The operation panel 104 includes various setting keys, numeric keys, start / stop keys, and the like. Also,
Among the data stored in the ROM 108, several types of image processing parameter data (correction coefficients and table data) used by the image processing unit 106 are stored as shown in FIG.

The operation of the above configuration will be described.
First, a case where the transmitting side performs image processing (hereinafter simply referred to as image processing) necessary to reproduce the original color of color image data as faithfully as possible will be described with reference to FIG. First, a color original is set in the image input unit 105, and the type of the set color original (for example, type of photograph, print, painting, document, etc.) is selected using the operation panel 104 (S301). After the number is input, start is instructed by the start / stop key. When the start is instructed, the CPU 109 reads the ROM
The transmission operation is started based on the control program stored in 108. The CPU 109 exchanges signals with the partner device via the NCU 101 (S302), and recognizes the model of the partner device (S303). Here, CPU1
09 indicates data to be used, that is, R, depending on the type of the recognized partner device and the type of the set color document.
The optimum data is selected from the image processing parameter data (see FIG. 2) stored in the OM 108 (S30).
4). Here, if the model of the partner device is different from the own device, standard image processing parameter data shown in FIG. 2 is selected, and if the model of the partner device is the same model as the own device, 2, data corresponding to the set color original is selected from the device-specific parameter data (data that has been optimally adjusted).

Next, the image of the color document is input to the image input unit 10.
5 (S305). Specifically, a color original is optically read for each of R, G, and B colors, converted into an electric signal (analog signal) by a photoelectric conversion element, and A / D
A / D conversion is performed by a converter to convert an analog electric signal into a digital signal. The image processing unit 106 performs image processing on the digital signal input via the image input unit 105 using the image processing parameter data selected in S304 (S306).

The image data after the image processing is encoded by the encoding / decoding section 103 (S307), and the encoded image data is modulated by the modem 102 (S30).
8). The modulated image data is sent out to the line via the NCU 101 (S309). As described above, the model of the partner device is recognized on the transmitting side, and image data subjected to optimal image processing is transmitted to the receiving side.

Next, a case where image processing is performed on the receiving side will be described with reference to FIG. When receiving a call from the line, the NCU 101 connects the line (S40).
1) The CPU 109 executes a receiving operation based on the control program stored in the ROM 108. First, CP
U109 exchanges signals with the partner device via the NCU 101 (S402), and recognizes the model of the partner device and the type of the document (S403). Here, as in the case of the transmission operation, the CPU 109 selects the optimum parameter data from the parameter data stored in the ROM 108 in accordance with the recognized model of the partner device and the type of the document (S4).
04). Next, the CPU 109 receives the transmitted image data via the NCU 101 (S405). The received image data is demodulated by the modem 102 (S
406), and are decoded by the encoding / decoding unit 103 (S407). Image processing is performed on the decoded image data by the image processing unit 106 (S408). That is, image processing using the image processing parameter data selected in S404 is performed. The image data after the image processing is printed in color by the image output unit 107 and output (S409). As described above, the receiving side (destination) recognizes the model of the partner device and the type of the document, performs optimal image processing on the image data, and outputs the image data.

As described above, according to the first embodiment, since the image processing is performed on the transmitting side or the receiving side according to the recognized model, the optimum image processing is performed irrespective of the model of the device that communicates. be able to.

In the first embodiment, the image processing is performed on either the transmitting side or the receiving side. However, the present invention is not limited to this. For example, the image processing is performed on both the transmitting side and the receiving side. Processing may be performed. In this case, when performing image processing on the receiving side, image processing may be performed in consideration of image processing on the transmitting side.

[Second Embodiment] A color facsimile apparatus according to a second embodiment converts specific value information of correction and adjustment in image processing (hereinafter referred to as color processing information) into a protocol signal for performing signal exchange. This is added and transmitted. The configuration is the same as in the first embodiment, and illustration and description are omitted.

The operation of each part in the transmission and reception operations of the second embodiment is the same as that of the first embodiment, and only the outline operation will be described with reference to FIG. First, the set color document is read by the scanner in the image input unit 105 (S5).
01), image processing is performed on the read image data (S5).
02), the receiving side (transmission destination) is called via the NCU 101 (S503). Subsequently, the protocol signal to which the color processing information is added is sent to the called receiving side (S50).
4). The receiving side extracts the color processing information from the protocol signal (S505), and receives the image data transmitted thereafter (S506). Next, the image data is processed in accordance with the color processing information extracted in S505 (S50).
7). In the first embodiment, when the communication partner is a different model, image processing is performed using standard image processing parameters. However, in the second embodiment, by referring to the color processing information, Since it is possible to know what processing has been performed on the image data, it is possible to perform optimal image processing by judging from the color processing information even if the communication partner is a different model. Finally, the image data after image processing is printed in color (color recording) and output (S
508).

As described above, according to the second embodiment, since the color processing information is added to the protocol signal and transmitted, if the receiving side performs image processing according to the color processing information, if the communication partner is a different model, However, more optimal image processing can be performed.

[0020]

According to the color facsimile apparatus of the present invention as apparent from above, according to the present invention, determination that the communication partner is determined determination and document type of whether the same type as its own device
Means, image processing means for performing image processing to adjust the color balance of the color image data, the communication by the discriminating means
Based on the result of the discrimination between the model of the communication partner and the type of the document, the model of the communication partner and the model of the own machine are the same.
If so, select image processing parameters specific to the machine
If the model of the communication partner and the model of the own machine are different,
In this case, standard image processing parameters are selected, and the details of image processing to be executed by the image processing means are selected.
The type of the original in the selected image processing parameters
Image processing changing means for changing the image processing to the image processing using the optimum image processing parameter according to the image quality, thereby improving the color reproducibility of the color image data even in the communication between the devices of different models. be able to.

According to the color facsimile apparatus of the present invention, the image processing means for performing image processing for adjusting the color balance of the color image data, and the color processing information for image processing performed by the image processing means at the time of transmission. Is added to the protocol signal and transmitted. At the time of reception, the color processing information applied to the transmission side added to the protocol signal is used.
Then, the image processing means performs the color transfer of the color image data.
Image processing to optimize the lance
Since the control means for controlling is provided, the reproducibility of the color of the color image data can be improved even in the communication between devices of different models.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating a configuration of a first embodiment.

FIG. 2 is an explanatory diagram showing data stored in a ROM.

FIG. 3 is a flowchart illustrating a transmission operation according to the first embodiment.

FIG. 4 is a flowchart illustrating a receiving operation according to the first embodiment.

FIG. 5 is a flowchart illustrating a control operation according to the second embodiment.

[Explanation of symbols]

 106 image processing unit 108 ROM 109 CPU

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) H04N 1/46-1/64 G06T 1/00 510 H04N 1/32

Claims (2)

(57) [Claims] And 1. A discrimination means the communication partner to determine the discrimination and the document type of whether the same type as its own device, image processing means for performing image processing to adjust the color balance of the color image data, wherein The model of the communication partner by the determination means
And the communication based on the determination result of the type of the original.
If the model of the other party and the model of the own machine are the same,
Select the image processing parameters specific to the own device, and
If the model of the hand and the model of the own machine are different,
Image processing parameters are selected, and the contents of the image processing to be executed by the image processing means are described.
Optimum image processing parameters according to the type of the original
A color facsimile apparatus comprising: image processing changing means for changing to image processing using image processing parameters . 2. An image processing means for performing image processing for adjusting a color balance of color image data, and at the time of transmission, transmitting color processing information for image processing performed by said image processing means by adding it to a protocol signal, At the time of reception, the color processing information applied on the transmission side added to the protocol signal
The image processing means responds to the report,
Image processing to optimize the color balance of
A color facsimile apparatus comprising: a control unit for performing control to perform the application .