JP3495430B2 - Copier - Google Patents

Description

Detailed Description of the Invention

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a copying machine having a variable magnification function.

[0002]

2. Description of the Related Art A conventional digital copying machine will be described with reference to FIGS.

This digital copying machine has a main controller 101,
Operation unit 102, scanner 103, A / D conversion unit 104,
The image processing unit 105 and the recording unit 106 are provided, and the main control unit 1
01 and the operation unit 102 are connected, and the scanner 103 and A
The D / D conversion unit 104, the image processing unit 105, and the recording unit 106 are connected, and the main control unit 101, the scanner 103, the image processing unit 105, and the recording unit 106 are each connected to a bus. The operation unit 102 is configured as shown on the operation panel 200, and includes a scaling ratio setting key 201, a transfer paper size setting key 203, a density setting key 204, a copy number setting key 205, and a zoom scaling. Various settings are made from various setting keys such as the key 207, and by turning on the start button 206, the main control unit 101 operates the scanner 103 according to the various settings. The scanner 103 reads a document image and converts analog image data into an A / D conversion unit 10.
Output to 4. The A / D converter 104 converts the input analog image data into 8-bit digital image data and outputs it to the image processor 105. Image processing unit 105
Filter the input digital image data,
Image processing is performed according to various previously set settings such as density adjustment and scaling processing. The recording unit 103 includes the image processing unit 10
The image data processed by No. 5 is recorded on the transfer paper as a hard copy.

Now, the scaling process will be described with reference to FIGS.

In general, the scanner 103 reads the entire original by scanning the original in a direction perpendicular to the line (sub-scanning direction) by a line type CCD which reads an image one-dimensionally (in the main scanning direction). This scaling in the sub-scanning direction is C
By changing the scanning speed of the CD in accordance with the scaling factor (1/2 speed at 100% for 200%, twice speed at 50% for 50%), the interval between read pixels And the number is changed. Then, the scaling in the main scanning direction is
Since it is not possible to change the CCD reading pitch interval in the line direction, image data is calculated by assuming that the original image is read between the CCD reading pitches to perform scaling. FIG. 3 shows an example at the time of 80% and 140% scaling. The first stage shows the CCD pitch interval and the second stage shows the virtual position of the calculated image data at the time of 80% scaling. The third row shows the storage position of the calculated image data, the fourth row shows the virtual position of the calculated image data when the magnification is changed by 140%, and the fifth row shows the calculated virtual position. The storage location of the image data is shown. Such a scaling method is called a cubic function convolution method. FIG. 4 is a schematic diagram showing the virtual density D ₂ 'of the image data at the virtual position, and FIG.
And the virtual density D ₂ 'to the density of the surrounding image data (D ₁ ,
The calculation formula obtained from D ₂ , D ₃ , D ₄ ) is shown below. In FIG.
The function of h in the calculation formula of is shown. The value of γ is 0.
The value of the function of h is obtained by approximating close values of 00, 0.25, 0, 50, 0.75. Such a conventional technique is disclosed in Japanese Patent Laid-Open No. 3-78884.

[0006] By the way, except for the case of performing fixed-size scaling (such as converting an A4 size original image into an A3 size image), when the original image is scaled, how much the copied image is hard-copied. It's hard to imagine how big it will be. For this reason, the scaling factor is changed many times until the desired size of the copied image is obtained, and each time
The copy efficiency was output and the work efficiency was poor.

[0007]

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and it is an object of the present invention to determine a scaling factor with good work efficiency.

[0008]

SUMMARY OF THE INVENTION The present invention is to solve the above problems, comprises an inverting means for inverting the concentration of the copy image image, the control means includes a plurality, which is scaled in accordance with a plurality of magnification
As well as controls to the reversed by the reversing means a copy picture image alternately every magnification rate, characterized in that <br/> one end of each replicated image image which is the zooming controls to match . Well
In addition, the present invention inverts the density of an image composed of image data.
Inversion means for changing the image data so that
The control means is a plurality of copies that have been scaled according to a plurality of scaling factors.
Invert the image by inversion means alternately for each magnification.
The image data of the copied image is changed and controlled, and
Control so that one end of each magnified copy image matches.
It is characterized by

[0009]

[Action] copied image or picture de - comprises a reversing means for reversing the density of an image composed of data, the control means alternately multiple replication images scaled in accordance with a plurality of magnification for each scaling factor While controlling to invert by the inversion means ,
Since the control is performed so that the one ends of the scaled copied images match, the scale factor can be determined with good work efficiency.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described using a digital copying machine with reference to FIGS.

The digital copying machine according to this embodiment has a main controller 7
01, operation unit 702, scanner 703, A / D conversion unit 7
04, image processing unit 705, image storage unit 706, recording unit 7
07, the main control unit 701 and the operation unit 702 are connected, the scanner 703, the A / D conversion unit 704, the image processing unit 705, the image storage unit 706, and the recording unit 707 are connected, and the main control unit 701, Scanner 703, image processing unit 70
5, an image storage unit 706 and a recording unit 707 are each connected to the bus. The operation unit 702 is an operation panel 800.
The configuration is as shown in (1), and various settings similar to those of the conventional technique can be made. However, in the present embodiment, a scaling combination button 809, a density reversal button 810, a scaling recording button 811, and a memory (not shown) for storing the scaling are newly provided. On the operation panel 800, when the scaling ratio is set and then the scaling combination button 809 is turned on by a key for designating the scaling ratio such as enlargement, reduction, and the same-size key 801 and zoom key 807. The set scaling ratio is confirmed and stored in the memory. By repeating the setting and confirming operations a plurality of times, a plurality of scaling factors are set. The control performed by the main control unit 701 will be described using a flow chart. First, N = 0 is set and the memory is cleared (901). It is confirmed whether the scaling factor is set by the key for designating the scaling factor (902). It is confirmed whether the scaling combination button 809 is turned on (903).
When the scaling combination button 809 is turned on, the set scaling ratio is stored in the memory (904). N = N + 1
(905). It is confirmed whether or not the start button 806 is turned on (906). If the start button is turned on, it is confirmed whether N = 0 (907). N = 0
If so, a normal copying operation is performed (908). N
If = 0, the scaling factors stored in the memory are rearranged in order such that the scaled copy image becomes larger (909). The image storage unit 706 scales the document image centering on the upper left corner of the document image with the scaling factors in the rearranged order.
The operation of storing in the image storage unit 7 is repeated N times.
The copied image stored in 06 is recorded in the recording unit 707 (910).

A case where the original image is shown in FIG. 10 and the copied image is shown in FIG. 11 will be described.

First, 50% is set by the zoom key 807. When the scaling combination button 809 is turned on, 50% of this is stored in the memory. And N = 1
Becomes After that, if 80% is set in the same way, this 8
0% is stored in memory, N = 2. Furthermore, 70%
If is set, 70% of this is stored in memory and N =
It becomes 3. When the start button 806 is turned on, since N = 3, the value stored in the memory is 50.
%, 80%, 70%, 80%, 70%, 50%
Rearrange. Then, the copy image scaled by 80% is stored in the image storage unit 706, the copy image scaled by 70% is stored in the image storage unit 706, and finally 50%.
The scaled copy image is stored in the image storage unit 706.
Then, the copy image stored in the image storage unit 706 is recorded in the recording unit 707.

Next, a second embodiment of the present invention will be described with reference to FIG.
This will be described with reference to FIGS.

FIG. 12 is a flow chart (91) of the flow chart of FIG.
0) in detail, and the others are the same. First, the inversion flag = 0 and M = 0 are set (1201). M = M + 1
(1202). The original image is scaled at the Mth scaling factor stored in the memory (1203). It is confirmed whether the inversion flag = 0 (1204). If the inversion flag is not 0, it is confirmed whether the density inversion button 810 is turned on (1205). When the inversion flag = 0 or when the density inversion button 810 is not turned on,
The scaled copy image is stored in the image storage unit 706 as it is (1206). When the density inversion button 810 is turned on, the scaled copy image is displayed on the image processing unit 7.
In 05, the corresponding bit is inverted, that is, the density is inverted so as to convert (a) of FIG. 13 into (b), and the image is stored in the image storage unit 706 (1207). It is confirmed whether N = M (1208). If N = M, then
The copy image stored in the image storage unit 706 is recorded in the recording unit 707.
(1209). If N = M is not satisfied, the inversion flag is inverted and the process proceeds to (1202) (12
10). By controlling in this way, the original image is
As shown in FIG. 14, a copy image that has been scaled by 80% at a normal density, a copy image that has been scaled by 70% at an inverted density, and a scaled image that is at a normal density of 50%. The copied image is overlapped with the copied image, and the boundary of the copied image scaled by each scaling ratio becomes clear.

Next, a third embodiment of the present invention will be described with reference to FIG.
This will be described with reference to FIGS.

Between the image processing unit 705 and the image storage unit 706, a magnification number generating unit 1501 and an image data switching unit 1502 are provided. The magnification number generator 1501 has 0
As shown in FIG. 16, the numerical images from 9 to 9 have a density level of 255 (black) in the number part and a density level of 0 in the peripheral part.
A numeric image stored in (white) image data and corresponding to the magnification set by the magnification designating signal from the main control unit is read out every time the magnification is changed. When the scaling factor recording button 811 is turned on, the image data switching unit 1502 copies the numerical image data stored in the scaling factor number generating unit 1501 as shown in FIG. When the scaling factor recording button 811 is not turned on, the copied image is recorded as it is without being turned on.
Output to 7. The composite position of the image data of this number may be the lower right end or the lower left end.

In the above embodiment, a digital copying machine in which a document image is converted into image data and electrically scaled has been described, but an analog copying machine which performs optical scaling also can be used. The present invention is feasible and in this case,
Superimpose an image on the photoconductor of the recording unit, or transfer paper to N
The operation of recording the copied image recorded on the photoconductor on the transfer paper may be repeated N times by being conveyed to the transfer unit. For density reversal, negative / positive reversal is performed during development, and for recording variable magnification, a recording optical system of digital data composed of LEDs or the like may be provided.

[0019]

Effects of the Invention According to the invention of claim 1, 2, to be able to clarify the boundaries of a plurality of copy image image which is scaled by the magnification, a plurality of which are scaled by the magnification It becomes easy to compare the sizes of the copied images, and the scaling factor can be determined with good work efficiency.

[0020]

[0021]

According to the third aspect of the present invention, it is possible to clarify the scaling ratio of a plurality of copy images or image data scaled by each scaling ratio.

[0023]

[Brief description of drawings]

FIG. 1 is a block diagram of a conventional digital copying machine.

FIG. 2 is a diagram showing an operation panel of a conventional digital copying machine.

FIG. 3 is a first schematic diagram showing a cubic function convolution method.

FIG. 4 is a second schematic diagram showing a cubic function convolution method.

FIG. 5: Calculation formula of cubic function convolution method

FIG. 6 is a table of variables of the cubic function convolution method.

FIG. 7 is a block diagram showing a first embodiment of the present invention.

FIG. 8 is a diagram showing an operation panel according to the first embodiment of the present invention.

FIG. 9 is a flow chart showing the control of the first embodiment of the present invention.

FIG. 10 is a diagram showing an example of a document image.

FIG. 11 is a diagram showing an example of a copied image recorded according to the first embodiment of the present invention.

FIG. 12 is a flow chart showing the control of the second embodiment of the present invention.
Chart

FIG. 13 is a schematic diagram showing density inversion.

FIG. 14 is a diagram showing an example of a copied image recorded according to the second embodiment of the present invention.

FIG. 15 is a block diagram showing a third embodiment of the present invention.

FIG. 16 is a diagram showing image data generated by a magnification number generation unit.

FIG. 17 is a diagram showing an example of a copied image recorded according to the third embodiment of the present invention.

[Explanation of symbols]

701 Main control unit 702 Operation unit 703 Scanner 704 A / D converter 705 Image processing unit 706 image storage unit 707 recording section

Claims (3)

(57) [Claims] 1. A and original reading means for reading an original image, and setting means for setting a scaling factor for scaling the image read by the document reading unit, the read image in accordance with the magnification ratio Scaling means for scaling, recording means for recording the scaled image on a transfer paper as a copy image, instructing means for instructing the start of copying, and the setting means until the instructing of the instructing means. a plurality when a plurality of magnification has been set, the rearranging the plurality of magnification the modified magnification in order scaled plural copy image is larger by, it is scaled by the scaling factor of the plurality of the transfer sheet a plurality of copied images and control means for controlling the so that the overlap recording, and a reversing means for reversing the concentration of the copied image, the control means, which is scaled in accordance with a plurality of magnification
Controls the copying image for each magnification ratio so as to invert by the reversing means alternately, copying apparatus, characterized in that one end of each copy image which is the zooming controls to match. 2. A reads an original manuscript image, image de for each pixel -
Varying of zooming a document reading means for outputting a data, and setting means for setting a scaling factor for scaling the image read by the document reading unit, the images read in response to said the magnification ratio Magnification means, storage means for storing the image data of the image scaled by the scaling means, and a copy image composed of the image data stored in the storage means on a transfer paper. Recording means, instructing means for instructing the start of copying, and when a plurality of scaling factors are set by the setting means by the instruction of the instructing means, a plurality of scaling factors by the plurality of scaling factors are set . The scaling factors are rearranged in the descending order of the copied images, and the image data of the plurality of copied images scaled by the scaling unit in accordance with the rearranged scaling factors are superposed and stored in the storage unit. Control means to control Wherein the image de - so as to reverse the density of an image composed of data
And a reversing means for changing the image data, a plurality said control means, which is scaled in accordance with a plurality of magnification
Along with changes and controls the image data of the copied image so as to reverse by the reversing means alternately copy image for each magnification ratio, that one end of each copy image which is the zooming controls to match Characteristic copying machine. 3. The control means represents each scaling factor corresponding to each copy image or image data at the end opposite to the matched part of each copy image or image data.
The copying apparatus according to claim 1 or 2, wherein the numbers are controlled so as to be recorded or stored respectively.