KR19990058172A - High-speed Printing Method of Inkjet Type Composite Device - Google Patents

Abstract

The present invention relates to a high-speed printing method of an ink-jet type composite apparatus, which restores received facsimile data to image data, detects the start and end position values of the black-and-white image of the restored image data on a line by line basis, The minimum and maximum values of the start and end positions of the black-and-white image data in the line are selected and transmitted to the print unit so that only the minimum maximum value area of the start and end positions of the black-and- By printing, a high speed printing can be realized by preventing a waste of a printing time that an ink head is reciprocated to an area where a black pixel is not located, thereby shortening a fax call time.

Description

High-speed Printing Method of Inkjet Type Composite Device

The present invention relates to a high-speed printing method for an inkjet type composite apparatus, more particularly, to restoring received fax data to image data and detecting start and end position values of black-and- And more particularly, to a high-speed printing method for an inkjet type composite apparatus in which an ink head of a frit unit can print only a black pixel area of an image data, thereby increasing a printing speed.

2. Description of the Related Art In general, an inkjet multifunctional product (MFP) includes a scanner unit for reading an image of a document and converting the image into digital data, a printer unit for outputting converted data in a character form, For example, a facsimile, which is provided with communication means such as a telephone line for transmitting and receiving a document to exchange documents.

Recently, as fax communication becomes common, much information is exchanged through facsimile. Particularly, in the case of a document that needs to be processed quickly, information exchange through facsimile is very effective, thereby greatly improving work efficiency.

These facsimiles printed the fax data for the printing width of the printing paper according to the CCITT regulations when printing the fax data. For example, in the case of A4 paper, when the fax data is printed on the printing paper having the printing width defined by the CCITT regulation of 216 mm, the ink head prints the fax data while returning the entire 216 mm from the beginning to the end.

However, the actual received facsimile data is not composed of all the black dots within a prescribed printing width per line, that is, within 216 mm. On the other hand, while the ink head reciprocates all the printing width of the prescribed printing paper from beginning to end, There is a problem that the speed is lowered by the ink head reciprocating time in an area in which the ink head reciprocates and black pixels are not formed in an area where black pixels are not formed.

Therefore, an object of the present invention is to detect an area in which black pixels are formed within the printing width of the prescribed printing paper, and to allow the ink head to reciprocate by this detection area to print the fax receiving data.

1 is a block diagram schematically showing a general inkjet type composite apparatus.

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001]

According to another aspect of the present invention, there is provided a method of processing fax data, the method comprising the steps of: receiving facsimile data; initializing values of start and end points of blackening of image data; A step of detecting the start and end position values of the blackened pixels of the restored image data by comparing the start position value of the blackened pixels of the restored image data with the start position values of the blacked pixels of the initialized image data, Storing a start position value of a black region of restored image data as a start position value of a black region of initialized image data when a position value is smaller than a start position value of a black region of initialized image data; The end position value of the small image is compared with the end position value of the black region of the initialized image data Storing the end position value of the black point of the restored image data as the end position value of the black point of the initialized image data when the end position value of the black point of the original image data is larger than the end position value of the black point of the initialized image data; Determining whether the image data is restored by the set line, determining whether the image data is restored by the set line, whether the end of the page is restored, and determining whether the end of the received fax data is the end of the page The method comprising the steps of:

Wherein an initial value of a start position value of a black pixel of the image data is a pixel position maximum value of image data in a line unit and an initial value of an end position value of a black pixel of the image data is a pixel position minimum value of image data in a line unit.

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

1, the inkjet type composite apparatus includes a central processing unit 7 for controlling the copying, transmission and reception of manuscripts according to a predetermined program, a central processing unit 7 for storing program data and protocol data, A memory unit 4 for accessing or storing the original image data and the received data under the control of the central processing unit 4, and a plurality of keys capable of generating key data for setting an operation mode of the system, An operation panel (OPE) 3 having a display device capable of displaying the display data of the central processing unit 7 and inputting the image data to the display unit 7, And outputs the output data of the central processing unit 7 in analog form under the control of the central processing unit 7 to the central processing unit 7 A modem 8 for demodulating and outputting a high analog type input signal and a modem 8 for generating a communication loop of a telephone line (Tip, Ring) by being operated under the control of the central processing unit 7, A communication control unit 9 for interfacing a signal input from the public telephone network and a signal inputted from the public telephone network, A printer unit 6 as an output device for printing data, a sensor unit 2 for detecting whether or not the remaining amount of the recording sheet is remaining and providing the same to the central processing unit 7, And a speaker 1 for generating a sound.

A high-speed printing method of the inkjet type composite apparatus having such a structure will be described as follows.

First, fax data in the form of compressed data input from a public telephone network is interfaced by the communication control unit 9 and received by the modem 8. (S10)

When the facsimile data is received, the values of the start position of the black-and-white portion of the image data and the end position of the black-and-white portion of the image data are initialized, and the received fax data of the compressed data form is restored to the image data of the line unit (S12) )

The start position value of the black pixel of the image data represents a variable for storing the position value of the leftmost black pixel among the image data lines corresponding to the plurality of nozzles constituting the band unit, Represents a variable for storing the position value of the rightmost black pixel among the image data lines corresponding to the plurality of nozzles constituting the unit.

In order to smoothly carry out the embodiment of the present invention, the initial value of the start position value of the black-and-white portion of the image data is set to the maximum value of the pixel position of the image data of the line unit, and the initial value of the end position value of the black- Is set to the minimum value of the pixel position of the image data of the unit.

The central processing unit 7 detects the start position value of the black pixel of the restored image data and the end position value of the black pixel of the restored image data and then detects the start position value of the black pixel of the restored image data, (S14) (S15)

As a result of the comparison, if the start position value of the black region of the restored image data is smaller than the start position value of the black region of the initialized image data, the start position value of the black region of the restored image data is set to the start position value of the black region of the initialized image data (S16)

In addition, the central processing unit 7 compares the end position value of the black-and-white portion of the restored image data with the end position value of the black-and-white portion of the initialized image data, and when the comparison result shows that the end position value of the black- (S17) (S18) If the start position value of the black pixel of the restored image data is greater than the end position value of the black data of the image data,

Subsequently, the central processing unit 7 judges whether image data has been restored by the predetermined line (S19)

The preset line means image data lines corresponding to the nozzles constituting the band unit, so that the predetermined line can be changed according to the characteristics of the product.

If the image data is restored by the preset line, the central processing unit 7 determines whether the end of the page is the end of the page, and then determines the end of the message indicating the end of the received fax data message.

The received facsimile data is restored to image data. At the same time, the start and end position values of the black-and-white image of the restored image data are detected in units of lines as many as the set line, and then the values of the start and end position values of the black- The minimum and maximum values are selected and transmitted to the print unit, so that only the area within the minimum and maximum values of the black and white start and end positions of the image data is printed while the ink head is reciprocating, thereby preventing unnecessary printing time from being wasted can do.

As described above, according to the present invention, the received facsimile data is restored to image data. At the same time, the values of the start and end positions of the black-and-white image of the restored image data are detected line by line for each set line, The image data is printed while the ink head reciprocates only the area within the minimum maximum value of the black and white start and end position values of the image data by selecting the minimum and maximum values of the start and end position values of the small, It is possible to realize high-speed printing by preventing the ink head from being wasted due to the reciprocation of the ink head to the area where the ink head is not positioned.

Claims (2)

Receiving fax data; Initializing the start and end position values of the black and white pixels of the image data; Restoring the received fax data into the image data on a line-by-line basis; Detecting a start and end position value of a black pixel of the restored image data; And a start position value of a black region of the reconstructed image data is compared with a start position value of a black region of the reconstructed image data so that a start position value of a black region of the reconstructed image data is larger than a start position value of a black region of the initialized image data Storing a start position value of a black region of the restored image data as a start position value of a black region of the initialized image data; Comparing the end position value of the black region of the restored image data with the end position value of the black region of the initialized image data to determine whether the end position value of the black region of the restored image data is greater than the end position value of the black region of the initialized image data Storing the end position value of the black region of the restored image data as the end position value of the black region of the initialized image data; Determining whether the image data has been restored by the set line; Determining whether the image data is restored by the setting line, whether the end of the page is reached; And determining whether the received fax data is the end of the message if the end of the page is determined. 2. The image processing apparatus according to claim 1, wherein the initial value of the start position value of the black pixel of the image data is the maximum pixel position value of the image data on a line-by-line basis, Wherein the minimum value of the pixel position of the data is the minimum value of the pixel position of the data. .