JPH01195755A - Image reader - Google Patents

Abstract

PURPOSE:To easily and surely perform column jumping edit by scanning the maximum length possible to be scanned by a scanner when the operation of an image switching means is validated. CONSTITUTION:The position of a designation lever 14 is detected by a detecting means, and the image of an original is read by an image sensor 27, and also, at the time of outputting the image signal, the validity/invalidity of the image, that is, the presence/absence of the image signal is switched by the image switching means 55 at the position of the designation lever. And when the operation of the image switching means 55 is recognized as valid, in other words, when the switching of the presence/absence of the output of the image signal is performed by the designation lever, the scanner 20 scans the maximum length possible to be scanned. In such a way, no scan length is shortened, for example, by the size of copying paper, and it is possible to perform the reading of the image on the original surely by the scanner 20.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an image reading device that reads reflected light from an image surface of a document using an image sensor and outputs an image signal.

[Conventional technology and its problems]

Conventionally, image reading has been used as a means of inputting images to combiators and as a means of reading original images in digital copying machines, in which the image of the original is read by an image sensor, various edits are performed on the image, and an image signal is output. equipment is used.

In such an image reading device, a light source for illumination is moved in the sub-scanning direction below a document glass on which a document is placed, and the light reflected from the document is passed through a lens.
A one-dimensional image sensor including a CCD (charge-coupled device) arranged in the main scanning direction is known to receive light.

Now, in order to create these extracts from the original resident card or the original family register, a digital copying machine that combines an image reading device and a digital printer as described above is used. As a result, in order to create an extract, the resident record log or the original family register is used as a manuscript, and only the necessary columns are copied.

FIG. 14 is a front view showing an example of the structure of the column of resident record log D1.

The original residence card DI has a blank space M between a certain width from the right edge.
A basic column A is provided on the left side of the basic column A, and 1B-G are sequentially provided to the left of the basic column A. There are various numbers and width dimensions of columns B-G, and the dimensions of the original resident card D1 are modified sizes different from the dimensions of the standard size of column A or column B, which are usually used.

To create an extract from this original residence card D1, basic column A
, and the necessary columns from columns B to G can be edited and copied so that they are continuous on one sheet of paper (this is sometimes called "jump editing" or "jumping copying")0 For example: , column C
If column F and column F are required, copy these three columns plus the basic MAA without copying the other columns.

In conventional image reading devices, in order to edit and copy only a specific area, the coordinates of the four corners of the specific area on the document glass are entered using numerical keys on the operation panel, and then read by an image sensor. Only the image signal of this specific area within the image is output as valid.

However, with this conventional image reading device, inputting the coordinate position of the required part (field) of the original document (original resident record DI) is extremely troublesome and requires a lot of time and effort. However, there was a problem in that copy errors often occurred due to input errors. Further, even if there is no error in the input, if the position of the document placed on the document glass is shifted from the normal position, there is still a risk of copying errors.

In addition, standard size paper (copy paper) is used, but if the paper size is shorter than the original, the size of the paper (length in the sub-scanning direction) Since the image plane is not scanned only at a certain distance,
Even in the case of editing and copying as described above, there is a problem in that the entire length of the document may not be scanned, and desired image editing cannot be performed.

Furthermore, Japanese Patent Application Laid-Open No. 61-184047 discloses an image reading device in which a reading start position and a reading end position of a document can be set using a reading range setting section, and only the set range is read by an image sensor. is listed. However, in this conventional image reading device, the mechanical configuration is complicated so that only a set range is read by the image sensor, and only a part of the document is read, so the above-mentioned problems arise. It is not possible to perform column-jump editing.

SUMMARY OF THE INVENTION In view of the above-mentioned problems, it is an object of the present invention to provide an image reading device that can easily and reliably perform jump editing with a simple configuration.

[Means to solve the problem]

In order to solve the above-mentioned problems, the present invention is an image reader that scans the image surface of a document in the sub-scanning direction with a scanner, reads reflected light from the image surface with a one-dimensional image sensor, and outputs an image signal. In the apparatus, a designated lever is provided on the side of the document so as to be movable in the sub-scanning direction for reading an image of the document, and the image sensor receives reflected light from the designated lever to perform the sub-scanning of the designated lever. and an image switching means for switching between valid and invalid images read by the image sensor at the position of the designated lever, the image switching means being activated. Sometimes, the scanner is configured to scan the maximum length possible.

[For production]

Operate the designation lever to designate the part where you want the image to be valid and the part where you want the image to be invalid in the sub-scanning direction of the document.

At this time, if the original is so thin that the image is visible, set the original upside down. If the original is thick and the image cannot be clearly seen, first turn the original face-up 1, align the top position of the original, move the specified lever to the specified position, and then move the original without changing the top position. By turning it over, you can match it accurately.

The position of the designated lever is detected by the detection means, the image of the document is read by the image sensor, and when the image signal is output, it is determined whether the image is valid or invalid, that is, whether the image signal is output or not, and the image is switched. means for switching at a designated lever position.

When the operation of the image switching means is enabled, that is,
As mentioned above, when switching between the output and non-output of image signals using the specified lever, the scanner scans the maximum possible length, so the scan length will not be shortened depending on the size of the copy paper, for example, and the scanner will Image reading of the original is performed reliably.

〔Example] Embodiments of the present invention will be described below with reference to the drawings.

FIG. 9 is a block diagram showing the general configuration of the digital copy AT.

"Digital copying machine" is an image reader part 2 that reads the image of a document placed R on the original glass and outputs a digital image signal DPA, and an image editor based on the image signal DPA output from the image reader part 2. an image memory section 3 for printing, a printer section 4 for printing an image on paper using an image signal DPB from the image memory section 3, and a digital copying machine 1.
The operation panel 5 is equipped with various keys, display sections, etc. for operating the system, and control signals are exchanged between these sections, and operation signals, display signals, etc. are exchanged between the operation panel 5 and the The system is comprised of a system controller 6 that performs input and output.

The printer section 4 is a laser beam printer using a laser diode, a polygon mirror, etc.
An image memory unit 3 and a system controller 6 are installed in the housing, and a printer unit 4, an image memory unit 3
, and the system controller 6 constitute the printer 1b.

Further, an operation panel 5 is attached to the upper front part of the casing of the image reader part 2.
and an operation panel 5 constitute an image reader 1a. The image reader la is placed on top of the printer 1b, and they are electrically connected by a cable.

FIG. 1 is a perspective view showing the appearance of the image reader 1a.

In the image reader 1a, a document glass 12 for placing a document is attached to the top surface of a rectangular parallelepiped housing 11, and a document scale 13 is provided along the front edge of the document glass 12. Designation levers 14a to 14e that are movable in the scanning direction (sub-scanning direction) of the optical system are provided along the side edges. This designation lever 14 is used to select between a portion of the original document that needs to be copied and a portion to be skipped (a portion that does not need to be copied) when performing skip copying, which will be described later.
This is for specifying. In addition, manuscript scale 1
A pattern 47 for magnification and focus detection is formed on the back surface of 3, as will be described later. Further, in FIG. 1, the document cover is omitted.

FIG. 2 is a cross-sectional view along the sub-scanning direction showing the general structure of the image reader 13.

The light from the halogen lamp 21, which is the exposure source, passes through the reflecting mirror 22a.
, 22b, and irradiates the original placed on the original glass 12. The reflected light from the original is sequentially reflected by mirrors 23.25a and 25b, and then passes through a lens 26 to an image sensor 2 consisting of a -dimensional CCD.
7.

The image sensor 27 is long in the horizontal direction and is attached to the document glass 1.
It also receives the reflected light from the designated levers 14a-e provided outside the effective image area in the width direction (main scanning direction) of 2 and its extensions to both sides, and receives the image signal of the document. In addition, a detection signal for detecting the position of the specified bar 14a-e is also output.

The image sensor 27 is held by a holding section 2, and its position and angle are adjusted. Holding part 28 and lens 26
The adjustment of the 0 magnification attached to the moving table 29 is as follows.
Based on the lens magnification signal from the CPU 64, which will be described later,
This is done by moving the moving table 29 in the optical axis direction along the guide rod 3o by the lens motor 31.

The focus is adjusted by moving the holder 28 in the optical axis direction using a focus motor 32 attached to the moving table 29.

When reading the image on the original document, use the halogen lamp 2.
1. The scanner 20 consisting of the reflecting mirrors 22a and 22b and the mirror 23 moves a predetermined distance to the left (sub-scanning direction) in FIG. 2 and performs optical scanning.
A slider 24 consisting of mirrors 25a and 25b similarly moves at half the speed of the scanner 20.

FIG. 3 shows the original glass 12 and designation levers 14a-e.
FIG.

The designation levers 14a-e are movable over the entire length of the side edges of the original glass 12, but the designation levers 14a-e
An effective area EB where position designation by e is valid, and evacuation areas EA and E where position designation by designation levers 14a-e is invalid and the designation levers 14a=e are to be evacuated.
It is divided into C.

Further, in FIG. 3, designated levers 14a-e in the housing 11 are shown.
illumination light 33 provided along the lower part of the illumination light 33;
A reflector plate 34 is shown. This illumination light 33 is turned on for a certain period of time by pressing the illumination key 82 when performing skip editing, which will be described later. Lever 1
This is to facilitate the setting of 4a-e.

4 and 5 are an enlarged plan view and bottom view of the designation lever 14, and FIG. 6 is a cross-sectional perspective view showing the designation lever 14 in a cross section through its center.

The designation lever 14 consists of a lever main body 41 consisting of an upper piece 41a, a middle piece 41b, and a lower piece 41c shorter than the upper piece 41a, and a black marker 42 attached to the tip of the lower piece 41c.

The lever main body 41 holds the document glass 12 between its upper piece 41a and lower piece 41c, and is movable along the side edges in this state. An arrow 44 is formed on the upper surface of the upper piece 41a so that the position can be easily specified, and a protrusion 45 is formed so that the specifying lever 14 can be easily moved with a fingertip.

A tape-shaped white reflective band 43 is attached to the lower surface of the original glass 12 at a portion corresponding to the movement locus of the marker 42, and the reflective band 43 and the marker 42 move as the scanner 20 scans. , the halogen lamp 2 is located at the same sub-scanning direction position as the document reading position.
1. Therefore, when the scanner 20 comes to the position of the marker 42, the reflected light will be drastically reduced. By detecting changes in this reflected light, the positions of the designated levers 14a-e are detected, which will be described in detail later.

FIG. 7 is a block diagram showing the electric circuit of the image reader part 2. As shown in FIG.

The electric circuit of the image reader part 2 is connected to the image sensor 2
A-D converter 51 that converts the analog output signal from 7 into digital signal image data, a shading circuit 52 that corrects unevenness in the amount of light in the main scanning direction of image data and variation between bits of image sensor 27, and image data. Electrical reduction circuit 53 that reduces the image by thinning out data
, a comparison circuit 54 that compares the image data with the dark value data from the selector 60 and outputs a binarized signal; A selection output circuit 55 that outputs to the printer 1b, an inverter 56 that provides an inverted signal of the binary code to the selection output circuit 55, an image sensor 27, and a CPU 64.
A clock generation circuit 57 that provides a clock signal to the , an attribute RAM 5B that stores attribute data, a dither ROM 22 that stores two types of dark value patterns, dither pattern 1 and dither pattern 2, and a binary threshold value depending on the attribute data. A selector 60 selects data and dark value data from the dither ROM 59 and sends it to the comparison circuit 54, and a shading circuit 52
The output signal of C is stored for one scanning line (or one screen).
A line RAM 61 that provides the PU 64 with image information for one line, an EEFROM 62 that stores the focal length r and magnification of the lens 26, a DIP switch 63 that sets the operating mode, and a C that controls all of these.
It consists of PU64 etc.

The CPU 64 also inputs and outputs motor signals, lamp signals, fixed position signals, command signals, illumination light signals, etc., as well as inputs and outputs from each key and display section of the operation panel 5, which will be described later. It also controls input devices, display devices, and other control devices.

FIG. 8 is a front view of the operation panel 5.

The operation panel 5 includes ten numeric keys: a print key 71 for starting the copying operation, and a display section 72.0 to 9 for displaying the number of copies, magnification, density, trouble information, and other information. Numeric keypad 801 for inputting the number of copies and other setting values; clear/stop key 81. An illumination key 82 for turning on the illumination light 33, a Yogi Sensawa key 83, a paper display section 73 for displaying the size of the selected paper, an up key 84 and a down key for manually changing and setting the copy density. key 85, density selection key 86 for switching between manual and automatic density adjustment, magnification selection key 87 for selecting and setting the magnification, equal magnification key 88 for selecting same magnification, correcting increase/decrease in magnification. reduction correction key 89 and enlargement correction key 90, extract mode selection key 91 for switching between the extract mode (automatic paper selection or manual paper selection) for copying with skipped columns and the normal mode, display of extract mode and extract mode An extract mode display section 74 for displaying automatic paper selection or manual paper selection is arranged.

Next, the magnification and focus adjustment operations will be explained.

FIG. 10 is a diagram showing a pattern 47 for magnification and focus detection.

The pattern 47 is drawn on the back side of the document scale 13, and includes a black vertical striped focus adjustment pattern 48 provided at regular intervals in the center of the document scale 13, and a constant distance X on both sides of the focus adjustment pattern 48. It consists of a black horizontal band-shaped magnification adjustment pattern 49 provided. Note that next to the pattern 47 on the original side, there is a white pattern 50 for shading correction.
is provided.

When the scanner 20 is located at the pattern position directly below the pattern 47, the pattern 47 is illuminated by the halogen lamp 21, and the reflected light is reflected by the image sensor 27.
The magnification and focus are adjusted depending on the state of the image.

In other words, the magnification is determined by detecting the inner edge of the magnification adjustment pattern 49 with the image sensor 27 and measuring the length on the image sensor 27 corresponding to the distance X, so the determined magnification becomes the set magnification. The lens 26 is moved by the lens motor 31 so that they are equal.

Further, in the focused state, the signal based on the image of the bin HJI adjustment pattern 48 captured by the image sensor 27 alternates between the maximum value and the minimum value corresponding to the white and black of the focus adjustment pattern 48. However, as the out-of-focus state progresses, the brightness and darkness become less clear, the maximum value decreases and the minimum value increases, and the value gradually changes continuously in between.

Therefore, focus adjustment is performed by moving the image sensor 27 using the focus motor 32 so that the difference between the white level and the black level becomes maximum with a predetermined darkness value as the boundary.

Incidentally, the distance a between the reading position of the document D (pattern 47) and the lens 26, and the distance 'Mb between the lens 26 and the light receiving surface of the image sensor 27 have the following relationship when in focus.

a-f(1-1/Lβ)...(1)b=
f (1-β/L) ... (2) However, f ... Focal length of the lens 26 "L ... Reading magnification β ... Lens reduction ratio during reading Therefore, the method described above Once a specific magnification (for example, same magnification) is set and the focus is adjusted by is determined, and the lens motor 31 and focus motor 32 are controlled accordingly.

Next, the image editing operation using the attribute RAM 58 shown in FIG. 7 will be explained.

Editing attribute data for a plurality of areas of an image of a manuscript is written in the attribute RAM 5B.

Each area can be specified, for example, in units of 1 mm x 1 mm.

The attribute data consists of 4 bits (d3.d2.di.

dO), and each bit indicates the attribute information shown in Table 1.

Table 1 (attribute information) d3 White/effective pixel d2 Inverted/non-inverted di Binary/Dither dO Dither pattern 1/Dither pattern 2, that is, d
O specifies two dither patterns. dl specifies either binary processing or dither processing. d2 instructs black and white inversion. d3 instructs whitening.

Using the 4-bit attribute data shown in Table 1, the eight attributes shown in Table 2 can be given.

Table 2 (Attribute data) 00××White 01×× Black 100× Binary 101O Dither 1 1011 Dither 2 110× Inverted, binary 1110 Inverted, Dither 1 1111 Inverted, Dither 2 According to the attribute data set in the attribute RAM 58, You can perform editing such as masking, trimming, black and white inversion, and binary/halftone switching.

The dither ROM 59 is selected based on attribute data,
The dark value of dither pattern 1 or dither pattern 2 is generated according to the value of attribute information dO, and the dark value is (m
Xn) matrix.

The selector 60 selects the dither ROM 5 according to the attribute information d1.
The dark value from 9 and the binary dark value are selected and sent to the comparison circuit 54. In other words, if the attribute is dither, dither ROM5
If the attribute is binary, the data from 9 is sent to the comparison circuit 59 as binary threshold data.

Comparison circuit 59 compares the image data with the darkness value from selector 60 and sends the result to selection output circuit 55 . Note that when the attribute information d3 is "0", white data is sent. Further, a signal obtained by inverting the output signal of the comparator circuit 59 by an inverter 56 is also sent to the selection output circuit 55, and the inverted or non-inverted data is selected according to the attribute information d2 and synchronized with the effective image signal. and output it to the printer 1b.

This effective image signal is used for column skipping in the extract mode described later.
When performing the #H collection, on/off is switched every time the designated levers 14a-e are detected.

These operations are performed in response to one reading operation of the document sheet by the image reader section 2 described above. That is, the image data of the area on the document sheet corresponding to the area set in the attribute RAM 5B is processed based on the attribute information of each area.

Editing using the attribute RAM 58 described above is normally performed while viewing an image printed (copied) on paper by the printer 1b or while viewing the screen of a CRT display device (not shown) for a monitor.

Next, skipping editing in the extract mode will be explained.

As mentioned in the section on conventional technology, column jump editing is used to create an extract from the original resident card or family register, for example, by editing the basic 1 mA and column B- of the original resident card DI shown in Fig. 14. Editing only the necessary columns in G so that they are continuous on one sheet of paper. According to the digital copying machine l of this embodiment, skip editing can be performed without using the attribute RAM 5B and without looking at the image or screen.
This can be easily done by setting it on top of 2.

To perform skip editing, the extract mode is selected using the extract mode selection key 91, and the designation lever 14a-we is set to a desired position in accordance with the shelf position of the document tray. Here, as an example, a case will be described in which the above-mentioned resident record original D1 is used as a manuscript and its basic IA, Ic, and column F are edited and copied.

FIG. 12 shows the original residence card D1 placed on the original glass 12 in an R'
FIG. 2 is a plan view showing a closed state.

The original residence card D1 should have its image side (written side) facing downward, and its right end (basic IA side) should be placed on the manuscript scale 1.
f2 is placed in the normal state where it hits 3. The designated levers 14a-e are basic &lA and column B, IB and column C14.
It is set so as to be located at the boundary between 1ilIC, column D1, column E, column F1, column F, and column G, respectively.

In this state, when scanning is performed by the scanner 20, the entire image surface of the resident card log Di is scanned by the image sensor 20.
7 and its output signal is sent to the A-D converter 5
1. The signal is inputted to a selection output circuit 55 via a shading circuit 52, an electrical reduction circuit 53, and a comparison circuit 54.

At the same time, the end of the image sensor 27 receives the light reflected by the reflective band 43. Although the reflective band 43 is white, it becomes black due to the marker 42 at certain positions of the designated levers 14a-e, so the output of the image sensor 27 along the reflective band 43 is as shown in FIG. ↑When the control levers 14a to 14e are in position #=, the level drops dramatically.

This signal is converted into a digital value by the above-mentioned A-D converter 51, and is compared with the data of the dark value of the middle husband, so that the part of the marker 42 is "black" and the other part of the reflection band 43 is "black". Each portion is recognized as "white" by the CPU 64.

The width of the marker 42 in the sub-scanning direction is 6 millimeters,
The position of the marker 42 that is 3 mm further in the sub-scanning direction after detecting black J, that is, the designated lever 14
The center position of a-e is set as the setting position of the designated lever 14a-e.

Note that among the output signals from the image sensor 27, the original (
The image signal of the original residence card DI) and the detection signal of the designated levers 14a-e are distinguished from each other by the address from the clock signal (horizontal synchronization signal) generated by the clock generation circuit 57.

As described above, the image signal read by the image sensor 27, subjected to various processing, and input to the selection output circuit 55 is turned on when the scanner 20 reaches the leading edge position of the document, and is selectively output. The valid image signal is output from the circuit 55, and then when the position of the first specified lever 14a is reached, the effective image signal is turned off and the output is interrupted, and when the position of the second specified lever 14b is reached, it is output again, and thereafter, Each time the scanner 20 reaches the position of the designated lever 14cNe, the effective image signal is switched on and off, and the output of the image signal DPA from the selection output circuit 55 is switched.

That is, in the extract mode, the image signal DPA is output from the leading edge position of the document, and whether or not to output it is switched at the position of the designation lever 14a=e.

FIG. 13 is a diagram showing an image of the extract CP created as described above from the original residence card D1.

In this extract CP, the basic column A, column C1, and column F of the original residence certificate I) 1 are copied with skipping columns. The size of the extract CP is half the size of the original residence certificate D1,
For example, by setting manual paper selection in the extract mode using the extract mode selection key 91 and selecting a desired size of paper using the paper selection key 83, extracts CP of various sizes can be obtained.

In the embodiment described above, all five designated levers 14
Although the case where a to e are used has been described, if only one field is required, or if the fields are consecutive, it is often sufficient to use four or fewer designation levers 14.

In such a case, the unnecessary designation levers 14 should be evacuated to the evacuation areas EA and EC (see FIG. 3) on both sides in the sub-scanning direction, and the designation levers 14a=e should be evacuated to the evacuation areas EA and EC on both sides in the sub-scanning direction.
In the case of EC, even if the image sensor 27 detects the marker 42, processing for switching the effective image signal is not performed.

For example, the evacuation area EA is located at the end of the document scale 13,
In other words, it is approximately 30 mm from the tip of the manuscript (document leading edge position), and the length of the effective area EB is approximately 320 mm, which is sufficient to create an extract of most original resident records and original family registers. It is a value.

In addition, as understood from the above explanation, the designated lever 1
4a to 4e all have the same structure, so it is up to you which one to use. For example, the designated lever 14a is retracted to the evacuation area EA, and the designated lever 14b is moved to the effective area EB.
, the scanner 20 first detects the designated lever 14b, and the output of the image signal DPA is thereby switched off.

According to the above-described embodiment, it is possible to quickly and accurately perform column-skipping copying in which necessary columns of the original residence certificate DI (manuscript) are edited and copied so that they are continuous on one sheet of paper, and it is possible to do so quickly and accurately. This eliminates the problems of requiring a lot of time and effort to input coordinate positions, and of causing copy errors due to input errors or misalignment of the original.

When setting the designated levers 14a-e to predetermined positions,
By pressing the illumination key 82, the illumination light 33 is turned on for a certain period of time, so even if the document is thick, the state of the image surface can be seen through the back side. It can be adjusted accurately and the settings can be easily made.

In addition, within the movable range of the designated levers 14a to 14e, evacuation areas EA and EC are provided for retracting the designated levers, so only the required number of designated levers 14 can be used to edit the area for jump-to-column editing. Not only can it be designated, but it is also easy to use because it saves the trouble of removing the designated lever 14 that is not used.

Next, variable size copying in the extract mode will be explained.

The digital copying machine 1 of this embodiment is capable of both enlarged copying and reduced copying, but in the extract mode, enlarged copying is prohibited and only full-sized and reduced copying is possible.

First, a mechanism for enlarged copying and reduced copying will be explained.

Enlargement in the main scanning direction during enlarged copying is achieved by moving the lens 26 using the lens motor 31 to increase the distance 1 between the reading position of the document and the lens 26, as explained in FIG.
This is done by varying lIIIa and enlarging the image formed on the image sensor 27, and the enlargement in the sub-scanning direction is done by decelerating the scanning speed of the scanner 20 at a constant rate with respect to the same magnification.

Further, the reduction in the main scanning direction during reduction copying is performed by thinning out the image data obtained by reading the image data in the same state as at the same size with the image sensor 27 using the electrical reduction circuit 53. This is performed by increasing the scanning speed of the scanner 20 at a constant rate relative to the same magnification, contrary to the case of enlargement.

That is, in the sub-scanning direction, scanning is performed by varying the scanning speed, while in the main-scanning direction, enlargement is performed by optical expansion, and reduction is performed by electrical reduction.

By the way, when optical magnification is performed, the reading range of the document in the main scanning direction by the image sensor 27 becomes narrower. For this reason, the specified lever 1 provided outside the effective image area
4a=e and the marker 42 cannot be detected by the image sensor 27.

Therefore, when the extract mode is selected, enlarged copying is prohibited, and if the enlargement magnification has already been set, it is forcibly returned to the same size.

As a result, the designated lever 1 by the image sensor 27
The positions of 4a to 4e are reliably detected, and when the extract mode is set, the column jump editing is reliably performed as specified.

Next, the scan length of the scanner 20 in the extract mode will be explained.

As already mentioned, the extract mode is an editing mode for creating an extract from the original resident card or original family register. The size of the original family register is Mino format (280 x 390
) and family register (275x3BO), etc.
This is a modified size that is different from the standard sizes of the A or B rows that are normally used.

Therefore, in the extract mode, when the scanner 20 reads images in a range corresponding to a standard size document, there may be cases where not all images of the original resident card or original family register are read. In addition, in the extract mode, since it is often the case that originals with irregular sizes that are long in the vertical direction (sub-scanning direction) are copied without skipping, the original size is automatically detected or the size determined by the selected paper or copying magnification is set to a standard size. If only the area corresponding to the image is scanned, the entire image on the document sheet may not be read.
Designation lever 14 Select the necessary part designated by aye ([
) images may not be output.

In order to cope with this, the image reader 1a of this embodiment
Now, in the extract mode, the scan length of the scanner 20 is set to the maximum length, regardless of the size of the document paper.
The entire length of the document glass 12 is scanned.

As a result, no matter where the necessary part (41jl) of a modified size original such as an original residence card or an original family register is located in the sub-scanning direction, it is possible to make a correct copy without making a mistake. This makes it easier to use, saving you the trouble of re-copying or shifting the position of the document tray.

Next, the above-mentioned editing and copying operations will be explained using a flowchart.

15 to 20 are flowcharts showing the processing operations of the CPU 64, and FIG. 21 is a flowchart showing the processing operations of the system controller 6.

FIG. 15 is a flowchart showing the overall processing operation of the image reader part 2.

When the power is turned on, the halogen lamp 21 lights up (Step #1), and the scanner 20 moves to the position of the pattern 47 to adjust magnification and focus (Step #2).
).

Next, the focus is adjusted by the focus motor 32 (Step #3), and the magnification is detected (Step #4). If it is not 0 equal magnification (No in Step #5), the lens motor 31
is rotated in the direction of equal magnification (Step #6), the focus adjustment and magnification detection are repeated, thereby setting the magnification to equal magnification and focusing, and then turning off the halogen lamp 21 (Step #7).

Next, the attribute RAM 58 and the like are initialized (step #8), and the system waits for a command from the system controller 6.

When a command is input (step #9), a scaling request routine (step #11) is executed according to the command.
, yA collection printing step #12), scan request routine (step #13), and extract mot routine (
The process branches to step #14).

In the editing routine, specified attributes such as masking, trimming, inversion, and halftone are written into the attribute RAM 58.

Other routines are explained below.

FIG. 16 is a flowchart of the above-mentioned magnification change request routine.

When this routine is called, the magnification to be set (
(enlargement magnification or same magnification) is sent as a parameter.

First, it is determined whether the extract mode is selected depending on whether the extract flag is set to rl (step #
21).

If it is not the extract mode, read the focal path #f of the lens 26 from the EEPROM 62 (Step #22), and calculate the amount of movement of the lens 26 and image sensor 27 based on the focal length r, the set magnification, and the current magnification of the optical system. (Step #23), lens motor 31 and focus motor 3
2 (step #24).

If the mode is the extract mode, it is determined whether the request for changing the magnification is a request for returning to the same magnification (step #25), and if the answer is yes, execute steps #22 and later to equalize the optical system. If the answer is NO, that is, if the command is a request to change the magnification to an enlarged magnification, a magnification other than the same magnification (
In other words, in order to inform the user that the setting cannot be made to the magnification (enlargement magnification), a signal to that effect is sent to the system controller 6 (step #26).

Note that when this scaling request routine is called from the extract mote routine in FIG. 20, which will be described later, step #
The judgment in 25 is always yes, but if the call is made from any other source, the judgment will be different depending on the magnification sent as a parameter at that time.

Although not shown, when the reduction magnification is applied, a request for equal magnification is made to the optical system, and the electric reduction circuit 5
A reduction magnification signal is sent to 3.

FIG. 17 is a flowchart of the scan request routine described above.

First, a scan preprocessing routine is executed (step #31). This routine will be described later.

Next, turn on the halogen lamp 21 (Step #32)
, it is determined whether the scanner 20 is in the normal position by turning on and off a normal position switch (not shown) (step #
33). If it is not in the normal position, move the scan motor (not shown) in the return direction to the normal position (step 4).
34.35), stop the scan motor (step #36).

Next, the scanner 20 is moved to the position of the white pattern 50 on the document scale 13 by the scan motor (step #37L) and the shading data is written to the RAM in the shading circuit 52 (step #38).

Using this data and the image data from the AD converter 51, shading-corrected image data is output.

Next, the scanner 20 is moved to the leading edge position of the document by the scan motor (step #39). Since this moving distance is known in advance, scanning can be started accurately from the leading edge position of the document even when changing the magnification.

When the optical system reaches the leading edge position of the document, the effective image signal is turned on and the selection output circuit 55 outputs the image signal DPA (step #40).

Then, step # to determine whether or not it is in extract mode
41) If the mode is the extract mode, a reflection band sampling routine to be described later is executed (step #42).

After that, when the scanner 20 reaches the rear edge position of the document (step #43), the effective image signal is turned off and the image signal D
PA output is stopped (step #44). Then, the halogen lamp 21 is turned off, Step #45L, the scanner 20 is returned to the home position by the scan motor (Step #46, 47), and the scan motor is stopped (Step #48).

FIG. 18 is a flowchart of the above-described scan preprocessing routine.

First, determine whether you are in extract mode or not. Step #5
1) If the mode is not the extract mode, return immediately.

If the mode is the extract mode, it is determined whether or not an enlargement magnification is set in the optical system at that time (step #52);
If YES, a variable magnification request routine is called with the request to return to the same magnification as a parameter (step #53). This forcibly returns the optical system to the same magnification, and then informs the user that the magnification has been reset to a magnification different from the magnification set using the magnification selection key 87, etc.
A signal to that effect is sent to the system controller 6 (step #54).

FIG. 19 is a flowchart of the reflection band sampling routine described above.

First, it is determined whether or not the position of the scanner 20 is within the effective area EB (steps #61 and 62), and if it is outside the effective area EB, the process immediately returns. Whether or not the document is in the effective area EB is determined by checking the moving distance of the scanner 20 from the leading edge of the document.

Next, within the effective area EB, the image sensor 27
requests sampling of data of the portion of the reflection band 43 detected by the edge of the reflection band 43, and inputs the data (step #63). And the data sampled this time is
If the answer is yes, that is, if the marker 42 is not detected, the process jumps to step #71, and the data of "white" sampled this time is used as the data of the previous time. into the register that stores it.

If no, that is, if the data sampled this time is "black", it is determined whether the data sampled last time is "white" (step #65);
If this is no, the step gaff jumps to 1, and the "black" data sampled this time is placed in the register that stores the previous data.

If YES in step #65, that is, if the previous data was "white" and this time is "black," the next data is sampled (step #66) and it is determined whether this is "black" or not. (Step #67). If the answer is no, that is, if it is "white", step gaff 1 is jumped. This prevents false detection due to noise.

If YES in step #67, that is, if it is "black" twice in a row, it is determined whether or not the output of the image signal is currently permitted (step #68), and if it is, it is prohibited. , if not permitted, switch to permission (steps #69 and 70).

According to this routine, each time the marker 42 is detected in the effective area EH, the effective image signal from the CPU 64 is switched on and off, and the output of the image signal DPA from the selection output circuit 55 is switched on and off.

Note that before this routine is executed, that is, before scanning for image reading is started, "white" is initially set as the data determined in step #65, and the image signal is The default setting is to allow output.

FIG. 20 is a flowchart of the extractor mote routine of step #14 of the main flow shown in FIG. 15.

First, it is determined based on the mode signal sent from the system controller 6 whether or not the extract mode has been selected (step #81).

If yes, only allow electrical reduction step #
82), Set the extract flag to "1" to enter the extract mode Step #83), Determine whether the magnification of the optical system at that time is equal magnification (Step #84), If it is equal magnification. , returns as is, but if it is not the same size, that is, if the magnification is set, then in order to force it back to the same size, call the scaling request routine with the request to return to the same size as a parameter. (Step #85).

If no in step #81, both enlargement and reduction are permitted (step #86), and the abstract flag is reset to "0" (step #87).

FIG. 21 is a flowchart showing key processing operations of the system controller 6 related to the extract mode.

In this routine, it is determined in step #91 whether or not the extract mode has been selected by the extract mode selection key 91.
), if selected, transmits the selection of the extract mode to the image reader part 2 (step #92).

In the embodiment described above, five designated levers 14 a
-e, but the lever bodies 41 and markers 4 of designated levers 14a-e may have four or less or six or more.
The structure of No. 2 can be modified in various ways. marker 42
And the color of the reflective band 43 may be a different color from the above. The reflected light from the marker 42 and the reflective band 43 may be detected by an optical sensor different from the image sensor 27. Instead of the extract mode selection key 91 for selecting the extract mode, other setting means may be used, such as using two keys, an extract mode setting key and an extract mode release key.

In the above-described embodiment, the output from the selection output circuit 55 is turned on and off in order to switch between the output and non-output of image signals at the positions of the designated levers 14a to 14e.
All the image data of the document read by the image sensor 27 may be temporarily stored in a separately provided image memory, and the on/off control may be performed when reading from the image memory.

〔Effect of the invention〕

According to the present invention, it is possible to quickly and accurately perform image editing in which an image of a necessary portion of a document is read and output.

Therefore, it is possible to easily create an extract by reliably skipping the columns of the original resident card or original family register. This solves the problem of editing errors caused by misalignment of the original.

When the image switching means is enabled, the scanner scans the maximum possible length, so even if the document is of a different size, such as an original resident card or an original Japanese language document, the entire document will be scanned. It is possible to read the image side of the document, and even if the required part of the document is located at any position in the sub-scanning direction, it is possible to perform correct editing without causing mistakes in copying, and it is possible to recopy. It is easier to use because it eliminates the need to shift the position of the document.

[Brief explanation of the drawing]

The drawings show embodiments of the present invention; FIG. 1 is a perspective view showing the external appearance of an image reader, FIG. The figure is a perspective view showing the state of the original glass and designated lever.
Figures 4 and 5 are an enlarged plan view and bottom view of the designated lever, Figure 6 is a cross-sectional perspective view showing the center of the I-designated lever, and Figure 7 is an electrical part of the image reader. A block diagram showing the circuit; FIG. 8 is a front view of the operation panel; FIG. 9 is a block diagram showing the general configuration of the digital copying machine;
Figure 0 is a diagram showing the pattern for magnification and focus detection.
Figure 1 is a diagram showing the amount of light received by the image sensor due to the reflection band during scanning, Figure 12 is a plan view showing the original residence card placed on the original glass, and Figure 13 is an extract made from the original residence card. Figure 14 is a diagram showing an example of the column structure of the resident record log, Figures 15 to 20 are C
A flowchart showing the processing operation in the PU, and FIG. 21 is a flowchart showing the processing operation of the system controller. 1a... Image reader, 2... Part of image reader (image reading device), 5... Operation panel, 6...
...System controller, 14.14a-e...Specification lever, 20...Scanner, 27...Image sensor, 42...Marker, 43...Reflection band, 55
...Selection output circuit (image switching means), 64...
CPU, D...manuscript, Dl...original resident card (manuscript)
, DPA... image signal. Figure 1 Actual Gate S\J Figure 16 Figure 18 Figure 17

Claims (1)

[Claims] (1) In an image reading device that scans the image surface of a document in the sub-scanning direction with a scanner, reads reflected light from the image surface with a one-dimensional image sensor, and outputs an image signal, the sub-scanning of the image reading of the document is performed. a designation lever provided on the side of the document so as to be movable in the direction; a detection means for detecting the position of the designation lever in the sub-scanning direction by receiving reflected light from the designation lever by the image sensor; an image switching means for switching between valid and invalid images read by the image sensor at the position of the specified lever, and when the operation of the image switching means is enabled, the scanner is configured to perform scanning at the maximum possible scanning speed. An image reading device characterized by scanning length.