JP2968327B2 - Image editing method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a method for processing an image data from an external input device or a scanner by an image processor to obtain an image.
For example, the present invention relates to an image editing method for a digital copying machine, and more particularly, to an image editing method for obtaining an italic image by performing italic processing on a standard image.

[Conventional technology]

2. Description of the Related Art Conventionally, image data read by a scanner is input to an image processor, and when performing italic processing, it does not take a positional relationship with respect to the input standard document (image data), but simply uses italic based on only italic angle information. Had been treated.

This example is as shown in FIG. 6, and the image obtained when the standard original (a) is subjected to the oblique processing at a positive angle is as shown in (b), and the standard image (a) has a negative image. The image when the angle italic processing was performed was as shown in FIG.

Further, in the scanner for deforming an exposed image disclosed in Japanese Patent Application Laid-Open No. 58-191564, in a scanner of a method of temporarily writing image information obtained by reading and scanning into a memory, a timing of starting writing of image information for each scanning line to the memory is set. A technique for arbitrarily changing at least one of the scanning lines has been proposed.

[Problems to be solved by the invention]

However, in the above-described italic processing method, since the italic processing is performed without taking the positional relationship with respect to the input standard document, the obtained italic image is shown in FIG.
As shown in (c), there is a problem that a part of the oblique image is missing and a desired oblique image may not be obtained.

Furthermore, it is difficult for the operator to recognize the position of the output image after the italic processing for the standard document. there were.

Further, the image deformation method proposed in Japanese Patent Application Laid-Open No. 58-191564 obtains an arbitrary deformed image of a document, and does not sufficiently solve the above-mentioned problems. In particular, it is not possible to compare an image obtained by the italic processing at the time of zooming with an original.

The present invention has been made in view of the above, and even after performing italic processing, it is possible to eliminate partial omission of an image and to make the positional relationship with a standard image substantially the same to improve the efficiency of italic copying work. The purpose is to improve.

[Means for solving the problem]

The present invention has been made in view of the above, and provides an image editing method for obtaining an italic image by processing standard image data transmitted from an external input device or a scanner by an image processor. The system controller instructs the image processor to overlap the center point of the standard image or a point similar thereto with the center point of the image obtained by the italic processing or the point similar thereto, based on the italic information input to the system controller from. Another object of the present invention is to provide an image editing method for obtaining an italic image by arithmetically processing load data output for each line in real time and shift data that does not change during image editing.

Further, the standard image data and the italic information input to the system controller from the operation panel are different from the standard image in that the writing position of the main scanning shifts to the rear end side of the main scanning as the sub scanning progresses. In the case of italic information, an image editing method is provided in which load data and shift data are calculated so that the sub-scanning tip after the italic processing is fixed with respect to the tip of the standard image and output to the image processor to obtain an italic image. Things.

Furthermore, when the image data and the italic information input from the operation panel to the system controller are compared with the standard image, the writing position of the main scanning is shifted toward the leading end of the main scanning as the sub-scan progresses. It is an object of the present invention to provide an image editing method in which load data and shift data are calculated so that the rear end of the sub-scan after processing is fixed with respect to the rear end of a standard image and output to an image processor to obtain an italic image.

(Operation)

The image editing method according to the present invention is based on basic image information represented by a length in the main scanning direction and a length in the sub-scanning direction input from a scanner or the like, a magnification from an operation panel, and data on an italic processing angle. The load data and the shift data are calculated by the system controller, and the image processor performs italic processing, and outputs an image by, for example, a digital copying machine.

〔Example〕

An embodiment of the present invention will be described below with reference to the accompanying drawings.

FIGS. 1A and 1B show the configuration of a digital copying machine using the image editing method of the present invention.
Is a view of the digital copier viewed from above, which corresponds to the upper surface of the scanner. FIG. 1B is a sectional view showing a schematic configuration of the digital copying machine.

1A and 1B, a scanner unit 100 for inputting an image includes an operation unit 107 for inputting a copy mode,
Platen cover 105 for holding originals, and platen cover 105
An editor 106 located at the top, an image tip sensor 104,
It comprises an external input terminal 108 and an image reading unit.

The document reading unit includes a carriage 101, a fluorescent lamp 102 for illuminating the document, and a photoelectric conversion device (CCD) 103 for reading reflected light from the document and converting the light into a charge amount.

The copier main body is composed of components 109 to 132 of the copying process.

That is, a paper feed cassette 10 for storing transfer paper of a predetermined size.
9, 110, paper feed rollers 111, 112 for feeding the transfer papers one by one from the paper feed cassettes 109, 110 in the direction of the transfer section, and transfer paper fed by the paper feed rollers 111, 112 to a predetermined number. A registration roller 117 that conveys the laser light to the transfer unit at a timing, a polygon mirror 116 that deflects the laser light, and a lens 115 that collects light from the polygon mirror 116 and performs fθ correction
A mirror 114 for deflecting the light passing through the lens 115 to the photosensitive drum 119; a charging charger 126 for uniformly charging the surface of the photosensitive drum 119;
After exposing the surface of the photosensitive drum 119 charged by 26, the developing device 113 for developing the electrostatic latent image formed by the exposure process with toner, and the transfer paper conveyed by the registration roller 117 are gripped, A transfer belt 120 for transporting the transfer belt 120 in a predetermined direction; a transfer belt charger 121 for charging the surface of the transfer belt 120 to attract the transfer paper to the transfer belt 120; and a transfer belt for transferring a visible image formed on the surface of the photosensitive drum 119. A transfer charger 118 for transferring onto the transfer paper adsorbed on the transfer belt 120; a belt separation charger 124 for separating the transfer paper adsorbed on the transfer belt 120; The charger 123, fixing units 127 and 128 (127 is a pressure roller, 128 is a fixing roller) for fixing an image on the transfer paper after the transfer processing, and the transfer paper after the fixing processing is discharged. That the discharge tray 129, and a cleaning unit 125. To clean the photosensitive drum 119 surface after the transfer process.

Reference numerals 130 and 131 denote image processors, and 132
Indicates a system controller.

The operation of the above configuration will be described. The image data read by the scanner unit 100 is sent to the image processors 130 and 131 and the system controller 132 which perform image processing and image editing.

A fluorescent lamp 102 for illuminating the document and a photoelectric conversion device (CCD) 103 for converting reflected light from the document into a reading charge are integrated with the carriage 101, and are provided in a sub-direction indicated by an arrow in FIG. The original image is read two-dimensionally by moving in the scanning direction. At this time, the image leading edge sensor 104 detects that the carriage 101 has reached the leading edge of the image area.

An editor 106 set on a platen cover 105 for holding a document is for inputting editing contents such as area designation, and other editing contents and copy processing conditions are set by the operation unit 107. The external input terminal 108 is a terminal for inputting image data from the outside.

The system controller 132 computes and creates image processing and image editing data according to the editing content input from the operation unit 107, and transmits the data to the image processors 130 and 131. These data are captured and held by a latch signal transmitted from the system controller 132 to the image processors 130 and 131.

Image data obtained by the scanner unit 100 is processed by image processors 130 and 131 in accordance with image processing and image editing data, and is transmitted to a printer. A laser driver (not shown) is controlled in accordance with the processed image data transmitted from the image processors 130 and 131, and the laser light is controlled.

The laser beam changes its direction by the polygon mirror 116 and the mirror 114, and the lens that collects the laser beam and performs fθ correction
Irradiated on the photosensitive drum 119 via 115. On the other hand, prior to this, since the surface of the photosensitive drum 119 is uniformly charged by the charging charger 126, an electrostatic latent image corresponding to the image data is formed on the photosensitive drum 119 by the potential distribution. Next, the electrostatic latent image formed on the surface of the photosensitive drum 119 is visualized by toner in the developing device 113.

On the other hand, the transfer paper is fed from a paper feed cassette 109 or 110 by a paper feed roller 111 or 112 and reaches a registration roller 117. The registration roller 117 is activated at a timing corresponding to the amount of movement in the sub-scanning direction based on the image leading end signal from the scanner, and intercepts the photosensitive drum 119 while nipping the transfer paper.

The transfer paper is conveyed while being electrostatically attracted by the transfer belt 120 charged by the transfer belt charger 121, and a transfer process is performed on the transfer paper in that state.
At this time, the transfer charger 118 performs the transfer process by applying a polarity opposite to that of the toner for transferring the visible image on the photosensitive drum 119 onto the transfer paper. The transfer paper after the transfer processing is electrically separated from the transfer belt 120 by the belt separation charger 124, further conveyed, reaches the nip between the fixing roller 128 and the pressure roller 127, and is subjected to the fixing processing. It is discharged to 129.

The cleaning unit 125 removes residual toner from the photosensitive drum 119 after the transfer process, and the photosensitive drum 119 is initialized.
Further, the transfer belt 120 after separation is used as the belt neutralization charger 1.
23, and one copy cycle ends.

FIG. 2 shows a scanner unit 100, image processors 130 and 131, a printer 204, a system controller 132,
FIG. 2 is a block diagram showing a data flow between the operation unit 107, the editor 106, and the external input device 201.

In the block diagram shown in FIG. 2, thick arrows indicate the flow of image data, and thin arrows indicate exchange of commands and signals.

Image data from the external input device 201 or the scanner unit 100 is processed by the image processors 130 and 131 and reproduced by the printer 204. Here, when an instruction for italic processing is given from the operation unit 107, shift data corresponding to the angle of the italic is output from the system controller 132 to the image processors 130 and 131.

FIG. 3 shows an italic processing circuit and a shift circuit of the image processor. The count value is controlled by a signal from a system controller 132, and a write address counter 301 for indicating an address value for storing data and a shift circuit for the shift circuit. RAM 302 for storing input data at an address indicated by write address counter 301, read counter 303 for indicating an address value for reading stored data, and a multiplexer for selectively inputting a plurality of signals from the circuit (Data selector) 304.

In the configuration of FIG. 3, the data input to the shift circuit is stored in the RAM 302 at the address indicated by the write address counter 301. The count value of the write address counter 301 is initialized to the load data from the system controller 132 by the lsync signal indicating that the line in the sub-scanning direction has been switched.
The count value is incremented or decremented by the u / d signal indicating the sign of the italic angle from 132 and the clock signal indicating the pixel in the main scanning direction.
I will do it.

The RAM 302 in which the data of one line is stored reads out the data of the address value indicated by the read counter 303 and is passed to the processing circuit of the next step in the image processors 130 and 131.

The read counter 303 is initialized by shift data given from the system controller 132 each time the lsync signal is input. At this time, the load data from the system controller 132 is provided as data for each line in real time, and the shift data is provided as data that does not change during the copying process.

In the above-described configuration, a case will be described where italic processing at a magnification ratio α is performed on a document image of the main scan x and the sub-scan y.

The load data L1 and the shift data L2 in FIG. 3 are calculated by the following equations.

In the following formula, 1 means the number of lines being processed, and the main scanning width of the transfer paper is X and the sub-scanning width is Y.

First, at the time of the first italic processing in which the center point of the scaled standard image that should appear on the transfer paper or a point similar thereto, and the center point of the image on which the italic processing has been performed on the standard image or a point similar thereto overlap. When the italic angle is positive (θ ≧ 0) L1 = 1 · tanθ (y · α ≧ Y) L2 = 1/2 · Y · tanθ (y · α <Y) L2 = 1/2 • y • α • tanθ When the italic angle is negative (θ <0) L1 = y • tanθ-1 • tanθ (y • α ≧ Y) L2 = 1/2 • Y • tanθ (y • α < In the case of Y), it is calculated by L2 = 1/2 · y · α · tanθ, and an italic image is obtained.

Also, in the case of the oblique processing in which the writing position of the main scanning shifts toward the rear end of the main scanning as the sub-scan progresses, the leading end of the sub-scan after the oblique processing is compared with the standard image after the magnification that should appear on the transfer paper. In the case of the italic processing in which the writing position of the main scanning is shifted to the main scanning front side as the sub-scan progresses, the rear end of the sub-scanning is fixed to the rear end of the standard image. When the italic angle is positive (θ ≧ 0) L1 = 1 · tan θ L2 = 0 When the italic angle is negative (θ <0) (y · α ≧ Y) When L1 = Y · tan θ−1 · tan θ (y · α <Y), L1 = y · α · tan θ-1 · tan θ L2 = 0, and an oblique image is obtained.

Now, when italic processing is performed on a standard image (original) as shown in FIG. 6 (a), the italic processing as shown in FIG. 6 (b) is made a positive angle, and as shown in FIG. 6 (c). When the above-described first italic processing is executed with the negative italic processing as a negative angle, images as shown in FIGS. 4 (a) and 4 (b) are obtained.

FIG. 4C shows an image subjected to reduction and italic processing, and FIG. 4D shows an image subjected to enlargement and italic processing. As a result, an image without any loss is obtained after any of the italic processes.

Also, the second italic processing shown above is performed in FIG.
Images are obtained as shown in (b), (c) and (d).

FIG. 5 (a) shows the amount of movement set so that the image at the leading end of the sub-scanning is fixed with respect to the standard image in the positive italic processing, and FIG. 5 (b) shows the standard in the negative italic processing. The moving amount is set so that the image at the rear end of the sub-scanning is fixed with respect to the image. The reduced image at this time is as shown in FIG. 5 (c), and the enlarged image is as shown in FIG. 5 (d).

By performing the italic processing on the standard image in this way, there is an effect that there is no image omission and the position of the image obtained after the italic processing is easily understood.

〔The invention's effect〕

As described above, according to the image editing method of the present invention, calculation is performed such that the center point of the standard image or a point similar thereto overlaps the center point of the image to be subjected to the oblique processing or a point similar thereto. As a result of the processing, the occurrence of partial omission of the image obtained by the italic processing is small even at the time of enlargement and reduction, and the position of the italic image to be copied can be predicted from the document position, so that the occurrence of miscopying is eliminated.

Also, in the case of the oblique processing in which the writing position of the main scanning shifts toward the rear end of the main scanning as the sub-scan progresses, the leading end of the sub-scan after the oblique processing is compared with the standard image after the magnification that should appear on the transfer paper. In the case of the italic processing in which the writing position of the main scanning is shifted to the main scanning front side as the sub-scan progresses, the rear end of the sub-scanning is fixed to the rear end of the standard image. Therefore, the loss of the italic image at the time of the reduction is reduced, and the situation of the image subjected to the italic processing after the scaling is easily predicted, and the efficiency of the copying operation is improved.

[Brief description of the drawings]

1 (a) and 1 (b) are diagrams showing the configuration of a digital copying machine using the image editing method according to the present invention, and FIG. 2 is a schematic block diagram showing the data flow of the digital copying machine shown in FIG. FIG. 3 is a block diagram showing an italic processing circuit and a shift circuit of the present invention, and FIGS. 4 (a) to 4 (d) are explanatory diagrams showing images obtained by the italic processing according to claim (1) of the present invention. ,
5 (a) to 5 (d) are explanatory diagrams showing images obtained by the italic processing according to claim (2) of the present invention, and FIGS. 6 (a) to 6 (d).
(C) is an explanatory view showing an image subjected to the conventional italic processing. EXPLANATION OF SYMBOLS 100: Scanner unit, 106: Editor 107: Operation unit 130, 131: Image processor 132: System controller 201: External input device, 204: Printer 301: Write address counter 302: RAM , 303 …… Readout counter 304 …… Multiplexer

Claims (3)

(57) [Claims] 1. An image editing method for processing a standard image data transmitted from an external input device or a scanner by an image processor to obtain an italic image, wherein the standard image data and italic information input to a system controller from an operation panel are provided. The system controller outputs to the image processor, in real time, one line at a time, so that the center point of the standard image or a point similar thereto overlaps the center point of the image obtained by the oblique processing or the point similar thereto. An image editing method characterized in that an italic image is obtained by arithmetically processing load data to be processed and shift data that does not change during image editing. 2. The method according to claim 1, wherein the standard image data and the italic information input to the system controller from the operation panel are different from the standard image in that the writing position of the main scanning is changed after the main scanning as the sub-scan progresses. In the case of the italic information shifted to the end side, load data and shift data are calculated so that the sub-scanning tip after the italic processing is fixed with respect to the tip of the standard image, and the calculation result is output to the image processor to output the italic. An image editing method characterized by obtaining an image. 3. The system according to claim 1, wherein the standard image data and the italic information input to the system controller from the operation panel are different from the standard image in that the writing position of the main scanning is shifted to the leading position of the main scanning as the sub-scan progresses. In the case of the oblique processing shifted to the side, the load data and the shift data are calculated so that the rear end of the sub-scan after the italic processing is fixed with respect to the rear end of the standard image, and the calculation result is output to the image processor. An image editing method characterized by obtaining an italic image.