JPS609269A - Information input device - Google Patents

Abstract

PURPOSE:To always obtain information of a good quality without imposing a burden on a user by correcting automatically a coordinate of an information input basing on an inclination detecting signal of an inclination detecting device, even in case when a paper slip is diagonally set. CONSTITUTION:A paper slip 10 on which information is described makes its information described surface tightly contact onto a transparent plate glass 60, is irradiated by a light of a light source 61 from the lower part of the glass 60, and its reflected light is sent to an input part 20 through a lens 62 and a photodetector 63. A read signal RD from this input part 20 is stored in a storage part 40. On the other hand, a reference symbol 12 for detecting an inclination is put on a corner part of a scanning area on the paper 10. This symbol 12 has prescribed length and width, and has a longitudinal segment in the direction orthogonal to an advance direction of the paper slip 10. In this state, areas DXCT, DYCT of the head part in the advance direction of the paper slip 10 are scanned by a control part, and an inclination is detected 30 from its scanning information. In this way, an output of the storage part 40 is corrected 50.

Description

DETAILED DESCRIPTION OF THE INVENTION Technical Field of the Invention The present invention relates to an information input device for reading and storing information on a sheet of paper. The present invention relates to an information input device capable of detecting a tilt and correcting stored information according to the tilt.

Background of the technology, conventional technology, and problems For example, it is used in a printing device that has a copy function or an overlay function. There are known information input devices that can be used to output data as .

In such an information input device, if the paper is tilted with respect to the scanning direction, the information is read and stored in the tilted state, and is output as an overlay. However, if the information is output as it was at the beginning, it will lead to poor print quality that is difficult to read, so it is a good idea to correct the inclination by some means.

Conventionally, the input information r is outputted to a CRT display, etc., and the tilt is corrected using, for example, a tracking ball or joystick/J= on the display surface, and the tilt of the input information is calculated using the corrected tilt amount. There is a method of correcting the input information, or a method of once displaying the input information on the display, resetting the paper to an acceptable level, re-reading it, and checking it on the display.

However, these conventional methods impose problems on the user and are time-consuming.

Purpose of the Invention The purpose of the present invention is to automatically detect the tilt of a sheet of paper without the user's intervention even if the sheet is tilted with respect to the scanning direction, and to correct the tilt of input information according to the amount of tilt. However, it is an object of the present invention to provide an information input device that can always provide information without tilt in the scanning direction.

Structure of the Invention In the present invention, in an information input device that optically scans information on a sheet of paper and stores input information, a reference symbol of a predetermined size is provided at a predetermined position on the sheet of paper. , comprising a tilt detection means for optically scanning the reference signal to detect the tilt of the sheet with respect to the scanning direction, and correcting the tilt of the stored information based on the tilt detection signal of the tilt detection means. An information input device is provided that indicates that the information has been set as %*.

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

FIG. 1 schematically shows the configuration of an information input device 1 according to the present invention. In FIG. ing. Light from a light source 61 is irradiated onto the information writing surface from below the plate glass 60, and the reflected light is incident on a light receiving element 63, for example a COD, through a lens 62, and the output signal of the light receiving element 63 is sent to an amplifier and an A-D converter. , a slicer, etc., is applied to the input section 20 in which the slicer and the like are incorporated.

The read signal RD from the input 20 is in this example a logic "0".
” or “1” digital signal is temporarily stored in the storage unit 40. The sheet of paper 10 is moved along with the glass plate 10 in the direction of the arrow x in FIG.

The sheet of paper 10 has a gap shown in FIG. 2, and reference symbols 12 for detecting inclination are marked at the corners of the scanning area 11. The reference symbol 12 has a constant length and a constant width. The reference symbol 12 is marked so as to maintain a constant positional relationship with the paper sheet 10, that is, to maintain a longitudinal line segment in a direction perpendicular to the direction of travel.

In order to detect the inclination of the paper sheet 10 from this line segment 12, the apparatus 1, as shown in FIG.
scan. A plurality of lines in the center row of FIG. 3 indicate scanning lines. It also indicates the scanning direction.

The area DXOT + DYOT is scanned, and the inclination of the line segment 12 with respect to the direction X is detected from the scanning information of the line segment 12. This inclination detection will be described below.

FIG. 4 shows the circuit of the slope detection section 30 (FIG. 1), including counters 301, 307, 311, and flip-flops 3.
02.303.304, AND dart 305.306,
Register 308.309.

312, the comparator 310 is wired to the y port shown in FIG. A circuit 313 is a circuit that calculates the slope from the signal obtained by the above circuit.

In FIG. 4, a control signal X is used to scan the area DXOT + DYOT for tilt detection. TIYOTI
TXGT and TYGT are the fifth
The timings shown are given in the figure. Signal X. T1
is signal X. It is behind T by one clock (τ), and X
oT and X. A TXGT of width τ is generated depending on the relationship between T and T. Signal Y. The relationships among T, YoTl, and TGYT are similar. A clock signal CLK is applied to the circuit shown in FIG. 4 as necessary. Further, the read signal (S number RD) from the input section 20 is applied to the terminal of the counter 301. The signal RD is a logic "1" when the symbol 12 is scanned, and a logic "0" in other areas. .

The counter 301 is set to an initial preset value PRI, and the logic of the read signal RD during horizontal scanning is "1", that is, the black line segment of the reference symbol 12 is detected as a crystal dot, and the number of dots continues for more than a value. detected and preset value PR1
If this is the case, it indicates that the reference symbol 12 has been detected! J-CI is output. In this way, only when black dots are detected continuously for a value exceeding the value, the signal is canceled! J-C
The reason for outputting 1 is to prevent the detection of the amount of inclination and the degree of inclination from decreasing due to noise elements such as stains. The width of the reference symbol 120 is such that at least several dots can be scanned.

With this carry C1, Schiffritz flop 302°30
3 is the detected address value of the line segment in register 309.3.
Create the timing to set it to 08, and also set the counter 31
A timing is created to set the flip-flop 304 to count down or count up to 1.

AND dart 306 is signal X. If the logic of T and YoT are both "1", that is, the area DXOT I DYO'F
The enable signal is applied only when scanning the 81' counter 307.
During this period, the counter 307 counts the clock signal CLK, and since the scanning signal is synchronized with this clock signal CLK, the position in the horizontal scanning direction is counted.

As mentioned above, when line segment 12 is detected and the carry C1 is output from the counter 301, the 7-lip float 302 is set and its Q output becomes "low", causing the register 30 to
8, the initial value is zero, is set in the register 309. Furthermore, the shift flop 304 is set by the Q output of the 7'7cI block 302. Then, after a delay of 1τ, the flip-flop 303 is set, so that the Q output of the flip-flop 303 causes the count value of the counter 307, that is, the detected address position of the line segment 12, to be set in the register 308. That is, register 308
．． The address position during the current scan and the address position during the previous scan are stored in 309, and the value of the register 308 is transferred to 309 with a time difference of 1τ.

The address value at which the line segment was detected in the previous scan is compared with the current address value by the comparator 310, and as a result, the counter 311 is instructed to count down or count down. The counter 311 is an up-down type counter, and a predetermined preset value PR3 is applied thereto, and the counter 311 counts down or counts up around this preset value.

When a line segment is detected as described above, the count signal of the counter 311 is outputted to the set flip-flop 304, and a signal TXGT indicating that the scanning of that row is completed is applied, and a signal from the AND dart 3o5 is applied. It is given by Flip 70 horn 304 is reset at the end of scanning that row.

Therefore, the counter 311 performs a countdown when the sheet 10 advances at an angle in the upper right corner as shown in FIG.
If it is the other way around, count up.

As a result, the direction of inclination of the sheet of paper and the value at that time are detected, and these data are stored in the register 312.

The above operation is repeated until the signal TYGT is issued, that is, until the scanning of the regions DXoT and DYoT is completed.

From the above data, the circuit 313 can calculate the inclination angle θ or the inclination amount ΔX (FIG. 3) since the line segment length t and the like are known in advance.

After the amount of inclination is detected, the information on the paper sheet is scanned and recorded in 1. It is stored in the d section 40.

In response to this information input, a correction circuit 50 performs rotation correction based on the amount of inclination obtained by the circuit 30.

As a result, even if the paper 'f110 is scanned in a tilted state, scanning information in the normal direction can always be obtained.

The present invention can take various extrapolated variations of what has been described above. For example, the number of reference symbols 12 on the sheet 10 is not limited to one, and can be provided not only at the head but also at the rear, or in a direction perpendicular to FIG. 2. However, it is not limited to the circuit 1'F) hX illustrated in FIGS. 1 and 4.

Further, the present invention can be used in various devices that input information and output that information.

Effects of the Invention According to the present invention, as described above, even if the sheet is set at an angle, the amount of inclination is automatically detected and the coordinates for information input are automatically corrected, reducing the burden on the user. It is possible to always provide high-quality information without causing problems.

[Brief explanation of the drawing]

FIG. 1 is a configuration diagram showing an information input device as an embodiment of the present invention, FIG. M2 is a diagram showing an embodiment of the paper sheet of the present invention used in the device shown in FIG. 1, and FIG. FIG. 4 is a circuit diagram of the tilt detection section of the apparatus shown in FIG. 1, and FIG. 5 is a signal characteristic diagram of the apparatus shown in FIG. 1. (Explanation of symbols) 1... Information input device, 10... Paper sheet, 12... Reference symbol, 20... Input section, 30... Tilt detection section, 4
0... Storage section, 50... Correction section, 60... Plate glass, 61... Light source, 62... Lens. Figure 1 Figure 2 Figure 3

Claims (1)

[Claims] 1. In an information input device that optically scans information on a paper sheet and stores the input information, a reference symbol of a predetermined size is provided at a predetermined position on the paper sheet, and the reference symbol is optically scanned. The paper sheet is characterized by comprising a tilt detecting means for scanning the paper sheet and detecting the tilt of the sheet with respect to the scanning direction, and correcting the tilt of the stored information based on the tilt detection signal of the tilt detecting means. An information input device.