JPS6057108B2 - Mark sheet reading method by facsimile - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION J The present invention relates to a mark sheet reading method using a facsimile transmitter as a mark sheet reading device.

When paper is input into a facsimile transmitter, the paper is generally slanted relative to the scanning direction of the facsimile transmitter.

This phenomenon does not cause any major inconvenience in normal facsimile applications since it simply tilts the receiving screen of the facsimile receiver, but the situation is different when the facsimile transmitter is used as an input device for a computer. This is because if the paper is not tilted, the area that can be scanned with a single scanning line may not be covered if the paper is tilted, unless it is scanned with multiple scanning lines. be. To solve this problem, a conventional method has been known in which all facsimile signals obtained by scanning paper with a facsimile transmitter are stored in a computer, the tilt angle of the paper is determined, and tilt correction processing is performed. The drawback was that it required a large storage capacity.

In addition, when a facsimile transmitter is used as a mark sheet reading device, a special mark for detecting the angle of inclination is printed on the mark sheet in advance, and the inclination angle of the mark sheet is determined by detecting the special mark with a calculator. There is also a method of performing mark processing corresponding to the above-mentioned inclination angle, but since there is no reference mark representing the reference point in the main scanning direction, it is difficult to accurately grasp the position of each mark, and in mark processing, the mark field If a finite number of black dots are detected on one scanning line that passes through the mark sheet, it will be determined that there is an entry mark in the mark field, but this has the disadvantage of misreading small dust on the mark sheet as an entry mark. was. In order to eliminate the drawbacks of the conventional example, the present invention arranges a reference mark, a scanning position designation mark, an inclination angle detection mark, and a mark field on a mark sheet, and first selects a mark sheet from among the facsimile signals scanned from the previous mark sheet. The present invention provides a mark sheet reading method using a facsimile in which an inclination angle is detected, and then a plurality of scanning lines to be scanned in a mark field are selected according to the inclination angle to perform mark processing.

Hereinafter, embodiments will be described in detail with reference to the drawings. Figure 1 shows
1 shows an example of a mark sheet used in the present invention.
is a mark sheet, 2 is a reference mark, 3 to 8 are scanning position designation marks, 9 to 16 are tilt angle detection marks, 17 to 32
is in the mark column.

However, the reference mark 2, scanning position designation marks 3 to 8, and tilt angle detection marks 9 to 16 are printed in colors that can be detected by the facsimile transmitter, and mark fields 17 to 32 are printed in colors that cannot be detected by the facsimile transmitter. shall be.
It is also assumed that the dimensions and arrangement of each mark are as follows. That is, the reference mark 2 is a line segment with a width of 1wrL,
Scanning position designation marks 3 to 8 have a width of 1T1r! N. ．． Vertical length 0.57707! , the inclination angle detection marks 9 to 16 have a width of 1Tn. ．． Vertical 3Wfm1 mark fields 17-36 are width 2
The vertical length is 7Trr1n. Also, the center and inclination angle detection marks 9 to 9 on the line connecting the scanning position designation marks 3 and 4
16 is on the same line perpendicular to the reference mark 2, and the center on the line connecting the scanning position designation marks 5 and 6 and the vertical center of the marks Wll7 to 24 are on the same line perpendicular to the reference mark 2.
It is assumed that the centers on the line connecting the scanning position designation marks 7 and 8 and the vertical centers of the mark fields 25 to 32 lie on the same straight line perpendicular to the reference mark 2. Further, the scanning position designation marks 5 and 7 are on a straight line passing through the scanning position designation mark 3 and parallel to the reference mark 2, and the scanning position designation marks 6 and 8 are on a straight line that passes through the scanning position designation mark 3 and is parallel to the reference mark 2.
The mark fields 17 to 32 pass through the inclination angle detection marks 9 to 16 and are on a straight line parallel to the reference mark 2, and are on a plurality of straight lines parallel to the reference mark 2. Further, the intervals between the reference mark 2, the scanning position designation marks 3 and 4, and the tilt angle detection marks 9 to 16 are in the order of 5, and the intervals between the tilt angle detection marks 9 to 16 and the mark fields 17 to 24 are 1.
It is assumed that the distance is 0WrIrL or more. Also, marks can be entered in the mark fields 17 to 32, as shown in mark fields 19 and 20, at any position in the field in the horizontal direction, and completely in the field in the vertical direction with a width of 1Tn! A line segment with a thickness of n or more shall be entered. Next, an inclination angle and a method for detecting the inclination angle when the mark sheet 1 is input into a facsimile transmitter will be explained with reference to FIG.

However, it is assumed that the facsimile transmitter main-scans the mark sheet 1 from left to right and sub-scans it from top to bottom. When the mark sheet 1 is inclined upward to the right with respect to the main scanning direction of the facsimile transmitter, the scanning line 33 passing through the scanning position designation mark 3 is downward to the right with respect to the mark sheet 1. When the tilt angle is small, this scanning line 33
does not intersect with the inclination angle detection marks 9 to 16 at all, but as the inclination angle increases, the scanning line 33 intersects with the inclination angle detection mark 16, and as the inclination angle further increases,
It can be easily understood from FIG. 2 that the scanning line 33 also intersects the inclination angle detection mark 15. Note that when the mark sheet 1 is tilted upward to the right, the scanning line 34 passing through the scanning/scanning position designation mark 4 does not intersect with the tilt angle detection marks 9 to 16 at all. Therefore, the scanning line 34 passing through the scanning position designation mark 4 is aligned with the inclination angle detection marks 9 to
16, it is determined that the mark sheet 1 is tilted upward to the right.
The inclination angle of the mark sheet 1 upward to the right can be determined depending on which of the marks intersects the mark sheet 1. The above relationship is the same even when the mark sheet 1 is tilted downward to the right, and the scanning line passing through the scanning position designation mark 3 is inclination angle detection mark 9 to
16, it is determined that the mark sheet 1 is tilted downward to the right, and the mark sheet 1 is determined depending on which of the tilt angle detection marks 9 to 16 the scanning line passing through the scanning position designation mark 4 intersects with. The downward slope angle to the right can be determined.

Here, the inclination direction and inclination angle of the mark sheet 1 are classified into the following four states.

(1) The scanning line passing through the scanning position designation mark 3 does not intersect with the tilt angle detection mark 10, and the scanning line passing through the scanning position designation mark 4 does not intersect with the tilt angle detection marks 9 to 16 at all.

(11) The scanning line passing through the scanning position designation mark 3 intersects with the tilt angle detection mark 10, and the scanning line passing through the scanning position designation mark 4 does not intersect with the tilt angle detection marks 9 to 16 at all.

(111) The scanning line passing through the scanning position designation mark 3 does not intersect any of the tilt angle detection marks 9 to 16, and the scanning line passing through the scanning position designation mark 4 crosses at least one of the tilt angle detection marks 12 to 16. intersect with one.

(1v) The scanning line passing through the scanning position designation mark 3 does not intersect any of the tilt angle detection marks 9 to 16, and the scanning line passing through the scanning position designation mark 4 does not intersect with the tilt angle detection mark 1.
Intersect with 1.

Next, an example of a mark processing method (a method for determining the presence or absence of an entry mark in the mark fields 17 to 24) according to the above four conditions will be described with reference to FIG.

First, in the case of state (1), the scanning line 35 passing through the scanning position designation mark 5 detects a mark within the mark fields 17 to 24, and 1T! of the scanning line 35! Un lower scanning line 36
If the mark IPAl7~24 is detected,
It is determined that entry marks are present in mark fields 17-24. Therefore, in this example, it is determined that entry marks exist in mark fields 19 and 20, and the other mark fields 17 to 1 are
No. 8, 21 to 24 are determined to have no entry marks. Next, in the case of state (Ii), the scanning line 37 passing through the scanning position designation mark 5 detects a mark in the mark fields 17 to 18, and the scanning line 37 below the scanning line 37 detects a mark.
If the mark is detected in the mark fields 17 to 18, it is determined that there is an entry mark in the mark fields 17 to 18,
Scanning line 37 detects marks in mark fields 19 to 24, and 1Tfr of scanning line 37! If the scanning line 39 above n detects marks in the mark fields 19-24, it is determined that there are entry marks in these mark fields 19-24.

Therefore, in this example, it is determined that entry marks exist in mark fields 19 and 20, and other mark fields 17 to 18,
It is determined that no entry mark exists in 21 to 24. Next, in the case of state (Iiii), the scanning line 40 passing through the scanning position designation mark 5 detects a mark in the mark fields 17 to 24, and the scanning line 40 1wn above the scanning line 40 detects a mark in the mark fields 17 to 24.
When the mark is detected in the mark fields 17-24, it is determined that entry marks exist in these mark fields 17-24.

Therefore, in this embodiment, it is determined that there are entry marks in the mark fields 19 and 20, and the other mark fields 17 to 1 are
No. 8, 21 to 24 are determined to have no entry marks. Next, in the case of state (Iv), the scanning line 42 passing through the scanning position designation mark 5 detects a mark in the mark fields 17 to 19, and the scanning line 43 above 1r1r1n of the scanning line 42 detects a mark in the mark field. If marks are detected in marks 17 to 19, it is determined that there are marks to be written in these mark fields 17 to 19, and the scanning line 42 is detected in mark fields 20 to 24.
If a mark is detected in the mark fields 20 to 24 and a scanning line 44 one position below the scanning line 42 detects a mark in the mark fields 20 to 24, it is determined that entry marks exist in these mark fields 20 to 24. do.

Therefore, in this example, it is determined that there are entry marks in mark fields 19 and 20, and other mark fields 17 to J8,
It is determined that no entry mark exists in 2l to 24. FIG. 4 shows an embodiment of a mark reading device that reads marks from a facsimile signal obtained by inputting the mark sheet 1 illustrated in FIG. 1 into a facsimile transmitter, and 45 is a facsimile signal input terminal; Reference numeral 46 refers to a synchronization signal separation device that separates a synchronization signal from the facsimile signal and outputs an image signal; 47 refers to a reference mark detection device that detects a signal corresponding to reference mark 2 from the image signal and determines a reference point; and 48 refers to The presence or absence of a signal at a predetermined position counting from the reference point is detected, and the image signal for one scanning line is divided into 10
49 is a temporary storage device that stores the preprocessed signal; 50 is a control device that writes and reads the preprocessed signal into the temporary storage device 49; This processing device detects the inclination angle of the mark sheet 1 from the preprocessed signal, and detects the presence or absence of marks written in the mark fields 17 to 34 by processing corresponding to the inclination angle.

Next, the operation of this embodiment will be explained.

However, in this explanation, it is assumed that the facsimile signal obtained by inputting the mark sheet 1 illustrated in FIG. When sub-scanning is performed from top to bottom, the scanning density is 4 lines per order in the main scanning direction and the sub-scanning direction, and when scanning the part written in a color that can be detected by the facsimile transmitter on mark sheet 1. The facsimile signal will be referred to as the black signal. First, when the facsimile signal of the first scanning line is input to the input terminal 45, the synchronization signal separating device 46 separates the synchronization signal from the facsimile signal and outputs an image signal. Next, the reference mark detection device examines the image signal sequentially from the end and detects a point (corresponding to reference mark 2) where three or more bits of black signal are continuous. Here, this point is tentatively named the reference point. Note that if the reference point is not detected, the process described below is stopped and the process moves to the next scanning line. Next, the pre-processing device 48 counts from the reference point [20r1-5].
~ [20n+5] Count the number of black signals present in the image signal within bits (n = 1, 2, 10), and if there are 3 or more bits of black signal, the signal is now at logic level 1, If the black signal is 2 bits or less, a signal of logic level 0 is made to correspond to it.] An O-bit preprocessing signal (information on the presence or absence of a mark at a predetermined position on one scanning line) is created. Next, the control device 50 writes the preprocessed signal into the temporary storage device 49.
With the above operations, the processing for the first scanning line is completed, and by repeating the same processing as described above for the second and subsequent scanning lines, the data is compressed to 10 bits per scanning line in the temporary storage device 49. The preprocessed signals for one mark sheet 1 are stored. Next, the control device 50 sequentially reads out the preprocessed signals from the temporary storage device 49 starting from the first scanning line and outputs them to the processing device 51 .

This processing device 51 determines the inclination angle and direction of the mark sheet 1 according to the explanation in FIG.
) to (Iv). Further, the processing device 51 performs mark processing according to the explanation in FIG. 3 depending on the above-mentioned state. Through the above operations, the processing device 5
1 determines that an entry mark exists in mark fields 19 and 20 of mark fields 17 to 32 of mark sheet 1. In this explanation, the mark sheet is as shown in Figure 1, but the size, shape, and number of each mark and mark field on the mark sheet are arbitrary, and even the relative positional relationship satisfies the conditions shown in Figure 1. All you have to do is stay there.

Furthermore, in the explanations in FIGS. 2 and 3, the inclination angle and inclination direction of the mark sheet are classified into four states, and the corresponding mark processing is performed, but the number of states is arbitrary. Furthermore, the third
In the explanation in the figure, the presence or absence of a mark to be entered in the mark field is determined by matching two scanning lines 1 m apart, but marks are marked by matching more than two scanning lines or by majority logic. It may also be determined whether there is an entry mark in the column. Further, the mark reading device shown in FIG. 4 also shows only one configuration example. As explained above, in the present invention, since the reference mark is written on the mark sheet in advance,
This has the advantage that the position of each mark on the mark sheet can be accurately grasped, and in the mark reading device, the facsimile signal of only the scanning line where the reference mark exists is used as information on the presence or absence of the mark (in the present invention, 10-bit information). )
This has the advantage of reducing the amount of memory in the mark reading device compared to a method that temporarily stores facsimile signals as they are. Because it uses
It has the advantage of not reading small dust on the mark sheet as a mark, and also has the advantage of detecting the inclination angle of the mark sheet and processing the corresponding marks, so the range of inclination angles in which marks can be processed is wide. According to the present invention, an ordinary facsimile transmitter can be used as a mark sheet input device.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing an example of a mark sheet according to the present invention;
FIG. 2 is an explanatory diagram showing a method for determining the inclination direction and inclination angle of a mark sheet according to the present invention, FIG. 3 is an explanatory diagram showing an example of a mark processing method according to the present invention, and FIG.
1 is a diagram showing an example of the configuration of a mark reading device according to the present invention. 1... Mark sheet, 2... Reference mark, 3-8... Scanning position designation mark, 9-16
...Inclination angle detection mark, 17-32...
...Mark field, 33-34...Scanning line, 35-
44...Scanning line, 45...Input terminal, 4
6... Synchronization signal separation device, 47... Reference mark detection device, 48... Preprocessing device, 49...
... Temporary storage device, 50 ... Control device, 51
・・・・・・Processing device.

Claims (1)

[Claims] 1. A reference mark whose length is formed by a long line segment in the sub-scanning direction of the facsimile transmitter, and a pair of scanning positions having a point on the orthogonal line segment of the reference mark as the center of point symmetry. a mark sheet on which a designated mark, an inclination angle detection mark having a center on the orthogonal line segment and having a plurality of line segments parallel to the reference mark arranged at equal intervals is printed in a color that can be detected by a facsimile transmitter; The reference mark is first detected from a facsimile signal obtained by scanning a mark sheet with a facsimile transmitter, and then the scanning position designation mark and the tilt angle detection mark existing at a predetermined position are detected based on the position where the reference mark is detected. A facsimile machine comprising means for determining the tilt angle and direction of the mark sheet based on the positional relationship in which a scanning line scanned over the scanning position designation mark intersects with the tilt angle detection mark. mark sheet reading method. 2. Print a pair of scanning position designation marks on the mark sheet in a color that can be detected by a facsimile transmitter, with the center of point symmetry at a point on a line segment orthogonal to the reference mark, and print them on the orthogonal line segment. A plurality of mark fields having a center and existing on an extension line of the inclination angle detection mark are printed in a color that cannot be detected by a facsimile transmitter, and the mark sheet is scanned by the facsimile transmitter to select the facsimile signal. If a scanning position designation mark is detected and then a scanning line passing through the scanning position designation mark detects a finite number of black dots in the mark field, there is a possibility that an entry mark exists in the mark field. Then, it is determined whether or not the entry mark exists in the mark field based on a coincidence of the possibility of the entry mark existing in the scanning line passing through the scanning position designation mark and a plurality of adjacent scanning lines, or based on majority logic. A mark sheet reading method using a facsimile machine, which is characterized by the ability to identify.