JPH0690327A - Digital copying machine - Google Patents

Abstract

PURPOSE:To easily select an optimum magnification and a paper size in matching with the preference of the operator without useless copying. CONSTITUTION:The copying machine is provided with a control panel 9 used to set the mode and on which an object picture is displayed, a control means 8 deciding a picture read range around a center registration position in response to a magnification and a paper size set by the control panel, a picture processing means 4 processing picture data read by a line sensor, and a memory 7 storing the picture data controlled by the control means and subject to picture processing. The control means 8 reads the picture data stored in the memory 7 when the control panel sets the confirmation mode and displays the data on the control panel together with the designated paper size frame.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a center-registration type digital copying machine, and more particularly to a digital copying machine which is capable of appropriately selecting a magnification and a paper sheet without making unnecessary copying. is there.

[0002]

2. Description of the Related Art Generally, in a copying machine, a corner register whose register position is set at a left back corner, a left front corner, etc. is used. Processing is performed. By the way, a ring,
In a digital copying machine that reads a three-dimensional object such as a clock with a CCD line sensor and can reduce or enlarge it, the three-dimensional object cannot be aligned with a corner.
Conventionally, a center registration method of a document upward type in which the center of a platen surface is set as a registration position so that the center of a three-dimensional object is aligned with the registration position and a subject is read from above is used.

When reducing or enlarging in such a center-registration type digital copying machine, the size of the original cannot be known by the machine because the original faces upward.
It is difficult to make a copy that matches the paper size without actually making a copy output. Therefore, it is necessary to take unnecessary copies to select the optimum combination of reduction ratio and paper size. It often becomes. As a countermeasure against this, it is desirable to be able to confirm the output image on the screen before making a copy output, but conventionally, in an image reading device or a copying machine using a CCD line sensor, a means for confirming the read image before being sent to a subsequent process. Has been proposed. For example, an original is read by a chamfering camera including a CCD array and displayed on a dedicated display, the original position is adjusted while observing the displayed image to set the original at a position without inclination, and then the CCD line sensor is scanned to display the image. There is proposed a method for reading and inputting (Japanese Patent Laid-Open No. 3-12).
4161).

[0004]

However, the above-mentioned conventional image confirmation method does not consider the post-process of image output, and whether it is optimal for the specified paper size when the image is reduced and enlarged. I could not confirm whether or not
In addition, there is a problem that it becomes expensive because a dedicated display is provided for confirmation.

The present invention is intended to solve the above problems, and in a digital copier at a center register, it is possible to easily select the optimum magnification and paper size according to the operator's preference without making unnecessary copies. It is an object of the present invention to provide a digital copying machine capable of performing the above.

[0006]

In the digital copying machine of the present invention, a center register system is used in which a reading range is determined with a center of a platen as a registration position and a reflected light from a document illuminated from above is read by a line sensor. In this digital copying machine, a mode is set, a control panel for displaying a subject image, a control means for determining an image reading range centered on a registration position according to a magnification and a paper size set on the control panel, and a line sensor An A / D converter for converting the analog image signal read in step 1 into a digital signal, and an image processing means for performing image processing such as shading correction and reduction / enlargement processing according to the magnification on the A / D converted image data. A memory that stores image data that has been subjected to image processing and is controlled by the control means, and the control means When the confirmation control panel mode is set, characterized in that the image displayed on the control panel together with the paper size frame specified by reading the image data stored in the memory.

Further, according to the present invention, when the magnification and the paper size are reset in the confirmation mode, the control means reads out the image data stored in the memory and performs the image processing so that the image data is reduced or expanded. Controls the means, stores the image data that has been reduced and expanded in the memory, and
The feature is that it is displayed on the control panel.

The center registration digital copying machine is capable of reading a three-dimensional object by reading a subject image from above with a CCD line sensor, and the read image is output by a laser printer or the like. .
The control panel has input keys for mode setting, magnification setting, paper size setting, density setting, etc., and an LCD or CRT screen for displaying an image. Can be displayed and confirmed. The control unit is composed of a CPU, and controls the entire device such as a control panel, a memory, an image processing unit, and a reading device. The image processing means performs various image processing such as shading correction, MTF correction, and reduction / enlargement processing.

[0009]

According to the present invention, the image reading area is determined according to the paper size and magnification specified by the control panel. The document to be read is illuminated from above the platen, centered at the registration position indicated by the spotlight, and then CC
It is read by the D line sensor. The read analog image signal is A / D converted, subjected to shading correction, thinning-out or interpolation processing according to the magnification, and the image data is stored in the memory. When the confirmation mode is set on the control panel, the image data stored in the memory is read and displayed on the control panel together with the paper frame of the designated size. When the displayed image needs correction by changing the paper size and magnification from the control panel in the confirmation mode, the enlargement / reduction processing according to the paper frame and the magnification is performed and the image is redisplayed on the panel. If the display image is the desired one, the output mode is set by the control panel, and the contents of the memory at that time are output by the laser printer or the like. In this way, it is possible to obtain the copy output by selecting the optimum magnification and the paper size according to the operator's preference while looking at the display image on the existing control panel without making unnecessary copies.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a block diagram showing the structure of a digital copying machine according to the present invention, FIG. 2 is a view showing an image reading device for reading a three-dimensional object, and FIG. FIG. 4 is a diagram showing a three-dimensional object image displayed on the control panel. In the figure, 1 is a CCD
A line sensor, 2 is an amplifier, 3 is an A / D converter, 4 is an image processing device, 5 is a line buffer, 6 is a bus switching device, 7 is a memory, 8 is a CPU, and 9 is a control panel.

The reading device 20 for reading and outputting a three-dimensional image of a subject will be described with reference to FIG. 2. An instruction is given by the control panel 21, and, for example, a fish 23 placed on the platen 22 is illuminated by an illumination lamp 25 above it. It is illuminated and the reflected light is read through the mirror 26 while scanning the CCD line sensor built in the camera 24.

When the subject is a three-dimensional object as described above, the original is read from above as shown in FIG. 2, so that the machine cannot know the size of the original, and the corner is not visible. Since it cannot be used as a cash register, spot light is applied to the center of the platen so that the center of the object is aligned with the center O as shown in FIG.

In this way, with the center of the subject aligned with the center of the platen, the control panel 9 in FIG.
When the copy magnification and the paper size are set, the CPU 8 determines the reading areas in the main scanning direction and the sub scanning direction. For example, the paper size is A4 (length 210mm, width 297m)
m), and when copying is performed at a magnification of 50%, the reading area in the main scanning direction in FIG. 3 is 210 ÷ 0.5 = 420 mm, and the reading area in the sub scanning direction is 297 ÷ 0.5 = 594 m.
m. The CCD line sensor 1 reads the document from above over the reading area determined in this way, amplifies the read analog image data by the amplifier 2, and A / D
A / D conversion is performed by the converter 3. The A / D converted image data is subjected to image processing such as shading correction, MTF correction and reduction / enlargement processing in the image processing device 4. The reduction / enlargement processing is performed according to the magnification set from the control panel 9 described above, and is performed by thinning processing in the case of reduction and interpolation processing in the case of enlargement. The image-processed image data is temporarily stored in the memory 7 via the bus switching device 6. At this time, when the confirmation mode is set on the control panel 9, the CPU 8 reads the image data stored in the memory 7 through the bus switching device 6 and displays it on the LCD or CRT screen of the control panel 9. The operator can judge whether the paper size and the magnification setting are appropriate by looking at the image displayed on the control panel. If the combination is not appropriate, the CPU 8 reads the image data stored in the memory 7 when the magnification and the paper size are reset in the confirmation mode, and the image processing apparatus 4 performs the expansion / contraction processing again. The image is stored in the memory 7 and displayed on the control panel together with the paper frame of the set size. In this way, when the desired paper size and magnification can be set, when the output mode is set from the control panel, the image data is read line by line from the memory 7 to the line buffer 5, and a laser printer or the like not shown in FIG. , For example, output on A4 paper.

[0014]

As described above, according to the present invention, the read image can be displayed together with the paper frame on the control panel before the print output, and it can be confirmed whether the combination of the paper size and the magnification is proper or not. In this case, you can change the paper size and magnification, and perform resize processing based on the image data that has already been read in and display it on the control panel to check whether it is valid without scanning again. Instead, the optimum magnification and paper size can be selected according to the operator's preference to obtain a copy output.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of a digital copying machine of the present invention.

FIG. 2 is a diagram showing an image reading device for reading a three-dimensional object.

FIG. 3 is a diagram illustrating image reading in a center registration method.

FIG. 4 is a diagram showing a three-dimensional object image displayed on the control panel.

[Explanation of symbols]

1 ... CCD line sensor, 2 ... Amplifier, 3 ... A / D converter, 4 ... Image processing device, 5 ... Line buffer, 6 ... Bus switching device, 7 ... Memory, 8 ... CPU, 9 ... Control panel.

Claims (2)

[Claims] 1. A center registration type digital copying machine in which a reading range is determined with the center of the platen as a registration position, and reflected light from an original illuminated from above is read by a line sensor. A control panel for displaying an image, a control means for determining an image reading range centered on the registration position according to the magnification and paper size set on the control panel,
An A / D converter that converts an analog image signal read by a line sensor into a digital signal, and image processing that performs image processing such as shading correction and scaling processing according to the magnification on the A / D converted image data. And a memory for storing image data that has been image-processed under the control of the control means, and the control means reads out the image data stored in the memory when the confirmation mode is set on the control panel. A digital copier that displays an image on the control panel together with the specified paper size frame. 2. The copying machine according to claim 1, wherein when the magnification and the paper size are reset in the confirmation mode, the control means reads the image data stored in the memory and performs the expansion / contraction processing on the image data. A digital copying machine characterized in that the image processing means is controlled as described above, and the image data subjected to the expansion / contraction processing is stored in a memory and displayed on a control panel.