JP3131999B2 - Report transmission / reception method - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to an image data receiving device.

[Prior Art] In general, a facsimile apparatus is configured to faithfully read the contents written on a transmission original and transmit the same. Even when various colors are used in the original, only a part of the color (light blue) is used. ), The contents of all originals are faithfully read and transmitted to the destination.

By the way, as a method of using a facsimile machine in a bank, a form is read by a facsimile machine, transmitted to another facsimile machine, and printed. A form in the same format as the form is set. When the form image data is received, this image data is printed on the form as it is.

At this time, on the transmitting side, the form may be sent up, down, left, or right, or may be sent at an angle due to factors such as mishandling. In this case, the following two methods are conventionally known as a correction method for correcting the positional deviation of the form reception image data.

In other words, there are known a correction method of moving the form reception image data horizontally and horizontally, and a correction method of calculating the inclination of the form reception image data and rotating the image data by one dot by this inclination angle for correction.

[Problems to be Solved by the Invention] However, in the former correction method based on parallel movement,
As shown in Fig. 5, when the form is sent while tilted,
When the received form image data is horizontally moved and corrected so that the correction mark position b in the received form image matches the predetermined original mark position a, as shown in FIG. There was a drawback that the ends were missing.

In the latter correction method using rotation, high-quality forms can be reproduced by effectively correcting the inclination of the form. However, since the image data is corrected by rotating one dot at a time, complicated calculations are repeated and repeated. And the correction process takes time.

It is considered that the cause is that the method is fixed to either the method by translation or the method by rotation.

An object of the present invention is to make it possible to correct a position shift of image data based on a correction formula selected from a plurality of correction formulas in accordance with the degree of inclination of received image data.

[Means for Solving the Problems] A means of the present invention is an image receiving apparatus for receiving image data including a correction mark for correcting a position shift, wherein the position of the correction mark is determined based on the received image data. Mark detecting means for detecting the inclination of the image data based on the mark position detected by the mark detecting means, and a plurality of marks corresponding to the magnitude of the inclination detected by the inclination detecting means. A correction formula selection unit for selecting an optimum correction formula from among the correction formulas, and an image data correction unit for correcting a displacement of the image data based on the correction formula selected by the correction formula selection unit. It is characterized by.

[Explanation of Functional Block Diagram] FIG. 1 is a functional block diagram of the present invention. In the figure, 1 is a transmission form, 2 is a mark detecting means, 3 is an inclination detecting means, 4 is a correction formula selecting means, and 5 is an image data correcting means.

Embodiment An embodiment will be described below with reference to FIGS. 2 to 4.

FIG. 2 is a system configuration diagram showing an overall configuration of a form transmitting / receiving system using facsimile transmission.

On a form 12 to be transmitted from a facsimile machine (transmitting facsimile apparatus) 11 on the transmitting side, correction marks 12a and 12b for correcting positional deviation of the form are formed in advance. The correction marks 12a and 12b are square black marks, and are formed by printing at positions opposing the upper right end and the upper left end of the form.

The transmission FAX device 11 obtains the form image data by performing photoelectric conversion when an arbitrary form 12 is inserted into the original insertion slot, compresses the image data with the compressor 11a, and transmits the image data to the exchange network 13. It has a normal configuration.

The receiving-side facsimile machine (reception fax machine) 14
When the form image data transmitted through the switching network 13 is received, the image data is expanded to the original image data by the expander 14a and sent to the control device 15.

The control device 15 detects the mark position corresponding to the correction mark from the received form image data when printing out the reception image data from the reception FAX device 14 from the printing device 16, and also detects the detected mark. The controller corrects the positional deviation of the form image data based on the position and the predetermined original mark position.
1 as the core, image buffer 15-2, mark detector
15-3, tilt detector 15-4, ROM 15-5, correction formula calculation unit 15-6, correction formula calculation unit 15-7, correction formula calculation unit 15-
8, an output buffer 15-9.

The control unit 15-1 writes the form image data transferred from the receiving fax machine 14 into the image buffer 15-2. The mark detector 15-3 searches the image buffer 15-2 and reads the correction mark 12 from the form image data.
The mark positions indicating a and 12b are detected and given to the inclination detector 15-4. The inclination detector 15-4 detects the inclination of the form image data on the basis of the detected mark position, and supplies the detection result to the control unit 15-1.

In this case, the control unit 15-1 compares the magnitude of the inclination (inclination angle γ) detected by the inclination detector 15-4 with the limit values R ₁ and R ₂ stored in the ROM 15-5, One of three types of correction formulas is selected according to the comparison result. That is, 0 ≦ | γ | <R ₁ ... Correction formula R ₁ ≦ | γ | <R ₂ ... Correction formula R ₂ <| γ |... Correction formula where R ₁ and R ₂ are 0 <R ₁ < the R ₂ tilt angle gamma and -90 ° <gamma <90 DEG.

Further, the correction formula, and the corresponding correction formula calculation unit 15
-6 to 15-8, and when the control unit 15-1 selects one of the correction formulas according to the inclination of the form image data, the image buffer 15-2 is selected based on the selected correction formula. The form image data is written into the output buffer 15-9 after its positional deviation is corrected. In addition,
The form image data in the output buffer 15-9 is printed out from the printing device 16. In the drawing, reference numeral 17 denotes a printed form.

 Next, the operation of this embodiment will be described.

First, when the form 12 is read by the sending fax machine 11,
The various entries are transmitted as form image data together with the correction marks 12a and 12b. In this case, it is assumed that the form image data is transmitted at an inclination and shifted vertically and horizontally.

Then, the transmitted form image data is stored in the exchange network 13.
The received form image data is stored in the image buffer 15-2 in the control device 15.

Then, in the control device 15, the mark detector 15-3
Searches the image buffer 15-2 to detect mark positions corresponding to the correction marks 12a and 12b from the form image data. In this case, the left mark position _{M 1 (mx 1, my 1} )
And detecting the right mark position _{M 2 (mx 2, my 2} ). If either the left mark position or the right mark position cannot be detected, the subsequent image correction is not performed, and the image data of the received form is stored in the output buffer 15-9 as it is.

Then, the tilt detector 15-4 detects the tilt angle γ from the _two mark positions M ₁ and M ₂ obtained by the mark detector 15-3 based on the following equation. Incidentally, the inclination angle γ which is the rotation angle around the left mark position M _1.

However mx ₁ <mx ₂ In this case, the control unit 15-1 compares the limit value R _1, R ₂ in the tilt angle γ ROM15-5, | γ | ≦ R 1 if correction formula,
If R ₁ <| γ | ≦ R ₂ , a correction formula is selected, and if | γ |> R ₂ , a correction formula is selected, and the positional deviation of the form image data in the image buffer 15-2 is corrected based on the selected correction formula. And supplies it to the output buffer 15-9.

FIG. 3 is a flowchart showing the operation in this case, and FIG. 4 is a diagram for explaining various parameters used during the correction calculation.

Note that in FIG. 4, S ₁ is the original left mark position is predetermined _{(SX 1, SY 1),} S 2 represents the right mark positions (SX _2, SY _2), image data of the received document Mark position M ₁ (mx ₁ , my ₁ ) and right mark position detected from
_Two correction vectors V ₁ and V ₂ obtained from the difference from M ₂ (mx ₂ , my ₂ ) are as follows.

V ₁ = (SX ₁ −mx ₁ , SY ₁ −my ₁ ) V ₂ = (SX ₂ −mx ₂ , SY ₂ −my ₂ ) The inclination angle γ is the left mark position M ₁ (mx ₁ , my ₁ ) , Right mark position M ₂ (mx ₂ , my ₂ ), and the rotation angle about the left mark position M ₁ .

First, in the flowchart of FIG.
1 obtains a correction vector V (step S1). In this case, a correction vector V ₁ = (SX ₁ −m
x ₁ , SY ₁ −my ₁ ). Then, the inclination angle γ and the limit value R ₁
Is compared with (step S2).

Now, | gamma | ≦ if R ₁ correction equation calculation unit 15-6 is selected, the form Softimage data correction vector V (V = V ₁₎ of the image buffer 15-2 staggered output buffer 15
The block is transferred to -9 (step S3). In other words, assuming that the old coordinates of the image data of the reception form are (x, y) and the corresponding coordinates after correction are (nx, ny), the correction expression calculation unit 15-6 calculates nx = x + SX ₁ −mx ₁ ny = y + SY performing the calculation of ₁ -my _1.

The reason why the correction equation is selected inclination angle γ is very small, since is negligible it, correcting expressions original left mark position it with respect to the left marks the position M ₁
It is a correction method by which to translate as conform to the S _1.

On the other hand, the absolute value of the inclination angle gamma in step S2 advances to step S4 is larger than the limit value _{R 1, | γ | ≦ R} 2 whether examined.

If R ₁ <| γ | ≦ R ₂ , the process proceeds to step S 5, and the correction vector V = (SX ₂ −mx ₂ , SY ₂
−my ₂ ). Then, the process proceeds to step S6, in which the values of the correction vectors V ₁ and V _{2 at} the left and right mark positions are averaged (V = V ₁ +
V _2/2), the form image data in the image buffer 15-2 shifting correction vector V block transferred to the output buffer 15-9 (step S3). That is, the inclination angle γ is R ₁ <
| Gamma | as long as it is within the range of ≦ R _2, the correction formula computing unit 15-7 is selected, the correction equation calculation unit 15-7 Is calculated.

On the other hand, the inclination angle of R ₂ <| γ | if, the process proceeds to step S7, after the output buffer 15-9 cleared NULL (NULL) will be described later in form image data in the image buffer 15-2 by one dot The coordinates are converted according to the correction formula, and dot data is plotted on the output buffer 15-9 at the corresponding position (step S8). Here, the correction formula is nx = (x−mx ₁ ) · cos (γ) + (y−my ₁ ) · sin (γ) + SX ₁ ny ₂ = (x−mx ₁ ) · sin (γ) + (y -my ₁₎ of · cos (γ) + SY ₁ performs calculation. This means that after rotating the left mark position M ₁ (mx ₁ , my ₁ ) by the angle γ, the left mark position M ₁ (mx ₁ , m ₁ )
y ₁ ) is translated to the original left mark position S ₁ (SX ₁ , SY ₁ ).

In setting the limit values R ₁ and R ₂ , the following is taken into consideration. In other words, in the case of an A4 vertical form, if it is inclined by 5 ° or more, the right or left below the form is missing in the correction formula. Also, 10
If the angle is more than ゜, the same problem occurs in the correction formula. On the other hand, it is extremely rare for forms to be sent at an inclination of 10 mm or more, and does not reach 10% of the total processing volume. For this reason, R ₁
It is preferable to set about 5% and R ₂ {10}. However, appropriate values are set depending on whether processing speed is given priority (limit angle = large) or accuracy is given priority (limit angle = small).

In the above embodiment, the corrected form image data is printed out, but may be sent to the OCR device.

Further, in the above embodiment, a square correction mark is formed in the upper right and upper left portions of the form, but the shape and number of the correction marks are not limited to this.For example, one horizontal line is used as the correction mark, The inclination may be obtained from both end positions of this straight line.

[Effect of the Invention] According to the present invention, it is possible to correct the positional deviation of image data based on a correction formula selected from a plurality of correction formulas according to the magnitude of the inclination of the received image data. As a result, high-quality image data can be efficiently obtained without spending time on the correction processing.

[Brief description of the drawings]

FIG. 1 is a functional block diagram of the present invention, FIGS. 2 to 4 show an embodiment, FIG. 2 is a system configuration diagram of a form transmission / reception system, FIG. FIG. 4 is a diagram for explaining various parameters for correction, and FIGS. 5 and 6 are diagrams for explaining a conventional example. 11: Fax device for transmission, 12a, 12b: Mark for correction, 14
... Reception fax machine, 15 Control device, 15-1 Control unit, 15-2 Image buffer, 15-3 Mark detector, 15-4 Tilt detector, 15-5 ...... ROM, 15-6
…… Correction formula calculation unit, 15-7 …… Correction formula calculation unit, 15-
8 ... Correction formula calculation unit, 15-9 ... Output buffer.

Claims (1)

(57) [Claims] 1. An image receiving apparatus for receiving image data including a correction mark for correcting a positional shift, comprising: mark detection means for detecting a position of a correction mark from the received image data; Inclination detecting means for detecting the inclination of the image data based on the mark position detected by the detecting means, and selecting an optimum correction expression from a plurality of correction expressions according to the magnitude of the inclination detected by the inclination detecting means An image data receiving apparatus comprising: a correction formula selecting unit that performs correction; and an image data correcting unit that corrects a position shift of the image data based on the correction formula selected by the correction formula selecting unit.