JPS62239662A - Original document processor - Google Patents

Abstract

PURPOSE:To automate the function setting such as picture edition by applying original document processing based on the coordinate by the 1st means detecting the coordinate of the original document and mark information by the 2nd means detecting a mark in the original. CONSTITUTION:Four points coordinates X1, Y1-X4, Y4 are detected by applying pre-scanning to the optical system when the main scanning direction is taken as X and subscanning direction is taken as Y from a reference coordinate SP on the original platen. Then a rectangular area surrounded by Y3, Y2 and X1, X4 is selected as a mark read range of the original document from the coordinates detected by the original document such as a hatched part. When the original document coordinate detection is finished, the optical system is at a point of Ymax in the subscanning direction and since the mark read start point Y2 and the end point Y3 are known, a CPU 211 starts the detection of white peak/black peak based on the count scanning line synchronizing signals corresponding to distance (Ymax-Y2). Then the main scanning line synchronizing signals are counted by a distance (Y2-Y3) from the point, the mark reading is finished and after the main scanning line synchronizing signals are counted by the distance Y3, the restoration is stopped.

Description

[Detailed description of the invention] (Technical field) The present invention relates to a document processing device.

(Prior art) Regarding document processing devices, devices have been developed that perform image editing processing such as moving compositing regarding some image technologies, but the function settings are complicated and are not suitable for large-volume tasks. Met.

(Object of the Invention) In view of the above points, it is an object of the present invention to identify setting information such as a mark in a document, and to automatically set functions for document processing using the mark. The first aspect is to identify a document position, identify a mark within that position, and output a document processing signal. Another gist identifies marks based on document coordinate information. Another aspect is to identify marks based on a plurality of set level values such as white and black peaks of the reading sensor.

(Example) Embodiments of the present invention will be described in detail below with reference to the drawings.

FIG. 1 is a schematic diagram of a document reading device to which the present invention can be applied. In order to read the image information of the original 102 held by the original cover 110 and placed on the original table 101, a CCD is used.
The illumination light from the light source 104 is reflected on the surface of the original 102, and the mirror 105.10
6, 107 and the image sensor 103 by the lens 108.
imaged on top. The light source 104, mirror 105, and mirrors 106, 107 move at a relative speed of 2:1. This optical unit is powered by a DC servo motor 109.
It moves left and right at a constant speed while applying PLL control. This moving speed is 90mm/90mm depending on the magnification on the outward journey.
It is variable from sec to 360mm/sec,
On the return trip it is always 630mm/Sec. The main scanning line perpendicular to the sub-scanning direction A in which this optical unit moves is scanned by an image sensor at 400 dots/i.
After the optical unit is moved forward from the left end to the right end while reading at the n ch O' resolution, it is moved back again to the left end to complete one scan.

In the apparatus of the embodiment, a standard white plate 16 with uniform reflection density is arranged on the back surface of the document table l, and the CCD l03 is placed at a predetermined stop position (home position) of the optical system unit.
This can be read by

FIG. 2 is a block diagram showing the functional configuration of the image reading device according to the embodiment. The image signal read by the C0D 103 is amplified by a video signal amplifier, passed through the A/D converter 201, and output as a 6-bit digital value, which is then output to the shading correction section.

FIG. 2 shows a schematic block diagram of a circuit that processes image signals from the image sensor 103. The image signal v□ read by the image sensor 103 is converted into a 6-bit digital signal by the A/D converter 201, and sent via the latch 202 to the latch 203, comparators 204, 207, latch 205 . 208.

The comparator 204 compares the 6-bit image signal sent from the latch 202 with the 6-bit image signal sent from the latch 203 l clock ago, and if the latch 202
If the new image signal sent from 02 is smaller,
A comparison output is output to the AND gate 206. AND gate 206 sends the comparison output from comparator 204 to latch 205 in synchronization with sampling clock SCL.

The comparator 207 compares both the 6-bit signals sent from the latch 202 with the 6-bit image signal sent from the latch 203 one clock ago.
If the new image signal sent from 2 is larger, a comparison output is output to AND gate 209. The AND gate 209 synchronizes the comparison output from the comparator 207 with the sampling clock SCL, and the latch 209
Send to 8.

When the latches 205 and 208 receive the hump rate output, they send the image signal sent from the latch 202 to the CPU 211.

In addition to the comparator output and the sampling clock SCK, the AND gates 206 and 209 also receive an enable signal EN indicating the valid section of the image signal from the image sensor 103, and receive the comparison result of the image signal in a predetermined section for each main scanning line. is sent to the CPU 211 from the latches 205 and 208. The CPU 211 receives the main scanning line synchronization signal MS.
By taking in the image signals from latches 205 and 208 in synchronization with , the lowest density level (hereinafter referred to as white peak) and the highest density level (hereinafter referred to as black peak) of each main scanning line can be detected.

The CPU 211 reads the mark using an algorithm described later based on the detected (black peak and white peak) for each line.

FIG. 3 shows a state in which a document is placed on the document table 101 of the document reading device (FIG. 1). In this case, the manuscript table 101
From the reference coordinates SP above, the main scanning direction is X, and the sub-scanning direction is Y.
The coordinates of the four points (xl, Yt), (x2, y
2), (,x3.

Y3) and (X4, Y4) are detected by pre-scanning the optical system. The document cover 110 (FIG. 1) is mirror-finished so that image data outside the area where the document is placed is always black data. In order to perform the pre-scanning over the entire glass surface, main scanning and sub-scanning are performed.

The circuit diagram in FIG. 4 shows the logic for detecting the coordinates.
The data is input to the register 301 in units of 8 bits. When the 8-bit input is completed, the gate circuit 302 checks whether all of the 8-bit data is a white image, and if YES, outputs 1 to the signal line 3. After starting scanning the original, the F/F 304 is set when the first 8-bit white appears.

(1) F/Ft*VSYNC (image leading edge signal) is reset in advance. After that, the next VSY
Leave it set until NC comes. When the F/F 304 is set, the value of the main scanning counter 351 at that time is loaded into the latch F/F 305. This becomes the x1 coordinate value. Also, the sub-scanning counter 350 at that time is stored in the latch 306.
The value of is loaded. This becomes the Y1 coordinate value. Therefore, pl(xl, yl) is found.

Also, each time 1 is output to the signal 303, the value from the main scanning is loaded into the latch 307. This value is immediately stored in latch 308 (until the next 8 bits enter shift register 301). When the value from the main scan when the first 8 bits of white appear is loaded into latch 308, 310(
This is compared in magnitude with the data in "OII" at the time of VSYNC by a comparator 309. If the data in the launch 308 is larger, the data in the latch 308, that is, the data in the latch 307, is loaded into the latch 310. Also, at this time, the value of the sub-scanning counter is loaded into the latch 311. This operation is processed until the next 8 bits enter the shift register 301. In this way, the latch 308
If the data of the latch 310 is applied to the entire image area, the maximum value of the document area in the X direction remains in the latch 310, and the coordinate in the Y direction at this time remains in the latch 311.

This is the P2 (X2, Y2) coordinate.

F/F 312 is an F/F that is set when 8-bit white appears for the first time in each main scanning line, and outputs the horizontal synchronization signal HSY.
It is reset by NC and the first 8 bits are set to white and held until the first HSYNC. When the F/F 312 is set, the value of the main scanning counter is set in the latch 313, and is loaded into the latch 314 until the next HSYNC.

Then, the latch 315 and the comparator 316 compare the magnitude. The maximum value in the X direction is preset in the latch 315 at the time VSYNC occurs. If the data in latch 315 is greater than the data in latch 314, signal 317 becomes active and the data in latch 314 or latch 313 is loaded into latch 315. In this operation, if the comparison operation of 0 or more performed between HSYNC and HSYNC is performed for the entire image area, the minimum value of the document coordinates in the X direction remains in the latch 315. This is x3. Also, when signal line 317 outputs, the value from the sub-scan is loaded into latch 318. This is Y3
become.

Latches 319 and 320 are loaded with the main scanning counter value and sub-scanning counter value at that time every time 8-bit white appears in the entire image area. Therefore, when the document pre-scanning is completed, the count value at the time when 8-bit white appears last remains on the counter. This is (x4゜Ya
).

Above 8 latches (6, 11, 20, 18゜5.10
．． 15.19) (7) The data line is connected to the pass line BUS of the CPU, and the CPU reads this data at the end of the previous scan.

Figure 5 shows the flow of document reading resequence.
In step 501, the optical system performs forward scanning from the left end to the right end in FIG. 1 to detect the coordinates of the document on the document table as described above.

Next, in step 502, a range for mark reading is calculated from the coordinate data detected in step 501.
For example, from the coordinates detected for a document such as the shaded area in FIG. 3, the mark reading range of this document is Y3. Choosing a rectangular area bounded by Yz and xl, x4 is actually prompting.

This is because the original is normally placed as parallel to the original table as possible, and even if the original is placed at a slight angle as shown in FIG. 3, there is no risk of picking up unnecessary information from outside the original. It is also possible to determine the sampling area in a natural manner. When the document coordinate detection is completed, the optical system is at the point in the sub-scanning direction Ymax, and the mark reading start point Y2 and end point Y3 are known, so steps 504, 505, and 506 are performed.
You can create a schedule to run. That is, when the double movement is started in step 503, the CPU 21
1 starts detecting the above-mentioned white peak value/black peak value after counting main scanning line synchronization signals corresponding to the distance (Ymax-Yz), and further calculates the distance (Yz
. . . Y3) After counting the main scanning line synchronizing signals corresponding to the distance ftY3, mark reading is finished, and after counting the main scanning line synchronizing signals corresponding to the distance ftY3, the backward movement is stopped.

Further, in step 504, when peak value detection is started, the enable signal EN mentioned above is set corresponding to the detection coordinates X 1 and X a as shown in FIG. 3.

With the above operations, it is possible to detect a predetermined position mark in a document located at an arbitrary position on the document table.

Next, a specific example of an algorithm for reading marks will be explained.

FIG. 6-1 (a) shows an example of a document (having images A to D). In this example, the document has mark entry areas 601 to 604 at predetermined positions, and the presence or absence of marks is detected, and if a mark is detected, an image of the area corresponding to the mark is extracted and prepared in advance. This is an example in which (C) is output by combining with the prepared format section 6-1 (b) (this is stored as format data in a memory (not shown)) and printing. That is, A-D
fl: After reading with one scan, A and C are printed on separate sheets of paper.
Combine with the format and print.

FIG. 6-2 shows the principle of the mark reading method. In this example, the marks are placed at a pitch P from the document reference point 605 at fLX in the main scanning direction and 1y in the sub-scanning direction. It is assumed that the main scanning width is ax and the sub-scanning width is ay.

First, mark the mark reading range 601 to 6
In order to limit the number to 04, perform the following operation. When X is a parameter indicating the position in the main scanning direction and Y is a parameter indicating the position in the sub-scanning direction, in the main scanning direction,
The enable signal EN described above is made true at the mark writing location. In other words, EN is applied only between the reading unit reference position X=X1+lx and X=X1+lX+a
Make true.

Similarly, in the sub-scanning direction, Y=Y3+iy+
From np Y=Y3+iy+np+ay (n=0.1.
2. Sample the white peak and black peak only during 3).

In FIGS. 6-1 and 6-2, marks are written only at mark entry locations 601 and 603.

FIG. 7 shows the self peak and black peak values when marked.

Assuming that a mark 7°2 is written in the mark entry area 701 as shown in Fig. 7(a), Fig. 7(b)
Take the values of the white peak and black peak as shown below. In section ■, the entire main scanning area is marked, so in section 0, where both the white peak and black rake have values closer to black, marked and unmarked parts coexist. The white peak and black peak are expressed as a difference4
In section (3), since there is no mark over the entire main scanning area, both the white peak and the black peak have values closer to white.

Now, if the marked portion 701 is not marked, the entire sub-scanning section will have white peak and black peak values as shown in section 3. By setting a certain threshold value for the obtained white peak and black peak values, it is determined which type of section ■ to ■ it is in the main scanning line, and by counting it in the sub-scanning direction, the section It is possible to determine which type of mark is more common, and it is possible to determine whether a mark has been written or not with less influence of noise.

In this embodiment, a device for extracting and compositing images depending on the presence or absence of marks has been described, but it can also be used for other image editing purposes or for controlling paper feeding.

(Effects) As described above, it is possible to identify marks set at predetermined values on objects to be read, such as manuscripts, and to automate function settings such as image editing, thereby saving work effort.

[Brief explanation of drawings]

Figure 1 is a schematic diagram of the document reading device, Figure 2 is a block diagram of the image signal processing circuit, Figure 3 is a diagram showing the relationship between the document placed on the document table and the position coordinates, and Figure 4 is the position coordinates. Detection Circuit Diagram FIG. 7 is a principle diagram of mark reading using white peak/black peak, and 103 in the figure is COD.

Claims (3)

[Claims] (1) It has a first means for detecting the position coordinates of the document, and a second means for detecting the mark in the document, and the position coordinates by the first means and the mark information by the second means are combined. A document processing device characterized in that a document is processed based on the document processing method. (2) In claim 1, the recognition position of the mark detected in the document by the second means is determined based on the document position coordinates obtained from the first means. Manuscript processing device. (3) The document processing apparatus according to claim 1, wherein the mark is determined within the coordinates of the document.