JPH04176262A - Horizontal correction system for facsimile equipment - Google Patents

Abstract

PURPOSE:To obtain an effective recording image by setting up a reference horizontal line on an original, finding out a difference angle between a horizontal scanning direction and a reference horizontal line at the time of reading out the original in the horizontal scanning direction and executing correction for allowing the horizontal scanning direction to coincide with the reference scanning direction based upon the difference angle. CONSTITUTION:The output of a scanner 1 for executing photoelectric scanning in the horizontal direction rectangular to the feeding direction of a transmitting original is applied to a correcting circuit 2 and the output of the circuit 2 is sent to an angle determining circuit 3 for controlling the scanning direction of the scanner 1. In accordance with the scanning start corresponding to the insertion of the original, 'reading of reference horizontal line' 21 is executed by the scanner 1, 'angle calculation of scanner' 22 is executed by the circuit 22 based upon the output of the scanner 1, a difference angle between the reference horizontal line of the original and the scanning direction of the scanner 1 is found out based upon the calculation 22 and the difference angle result is sent to an angle determining circuit 3, which executes 'angle determination of scanner' 23 to allow the reference horizontal line of the original to coincide with the scanning direction of the scanner 1.

Description

Detailed Description of the Invention 11=C [Industrial Application Field] The present invention provides a facsimile machine that performs horizontal scanning in a direction perpendicular to the feeding direction of a document, in which the horizontal scanning direction and the horizontal direction of the document are The present invention relates to a method for correcting mismatch.

[Conventional technology]

A facsimile machine photoelectrically performs horizontal scanning in a direction perpendicular to the document feeding direction, thereby obtaining image data of an image signal.

[Problem to be solved by the invention]

However, in the past, if the original was inserted incorrectly, the horizontal direction perpendicular to the original feeding direction and the horizontal scanning direction of the facsimile machine did not match, and the recording dots appeared on the receiving side's image in the case of a horizontal line, etc. Since it is not linear but has a jagged step-like shape, the recorded image has the disadvantage of becoming unsightly.

[Means to solve the problem]

The present invention is constructed by the following means.

=2- That is, in the first method, a reference horizontal line is provided on the original, and when reading the original in horizontal scanning, the difference angle between the horizontal scanning direction and the reference horizontal line is determined, and this difference angle is used to determine the horizontal scanning direction from the reference horizontal line. Correction will be made to make them match.

In addition, in the second method, a reference horizontal line is provided on the document,
When reading a document in horizontal scanning, the difference angle between the horizontal scanning direction and a reference horizontal line is determined, and the image data of the read output is corrected based on this difference angle so that the reference horizontal line and the horizontal direction of the image data match.

[For production]

Therefore, in the first method, even if the insertion direction of the original is irregular and the horizontal direction of the original does not match the horizontal scanning direction of the facsimile machine, the horizontal scanning direction will automatically match the horizontal direction of the original due to correction. matches.

Furthermore, in the second method, the horizontal direction of the image data is automatically corrected in the same case, so that results equivalent to those of the first method can be obtained.

〔Example〕

Hereinafter, the present invention will be explained in detail with reference to figures showing examples.

FIG. 1 is a block diagram of the main part, and the output of the scanner 1, which performs photoelectric scanning in the horizontal direction perpendicular to the feeding direction of the transmitted document, is given to the correction circuit 2, and the output of this is as follows. The signal is sent to an angle determining circuit 3 that controls the scanning direction of the scanner 1.

Note that a reference horizontal line perpendicular to the feeding direction of the original is written in advance at the beginning of the original in the insertion direction on the original to be inserted into the facsimile machine.

FIG. 2 shows the operating status of the scanner 1. In accordance with the start of scanning corresponding to the insertion of a document, the scanner 1 performs "reading of the reference horizontal line" 21, and based on the output of this, the correction circuit 2 "Scanner angle calculation" 2
2, and this aligns the document's reference horizontal line with scanner 1.
Find the difference angle from the scanning direction of let

FIG. 3 is a block diagram of the main parts corresponding to the second method, in which a data conversion circuit 4 is provided in place of the angle determining circuit 3 in FIG. 4 is also given.

FIG. 4 is a flowchart 1- showing the operating status of FIG. In circuit 2, "conversion minute angle calculation"
32, thereby determining the difference angle between the reference horizontal line of the document and the scanning direction, and also calculating the rotation angle for correcting the image data from the scanner 1.

Then, the result of step 32 is given to the data converter 4,
This causes "read data conversion" 33 to be performed.

Therefore, the image data from the scanner 1 has its horizontal direction coincident with the reference horizontal line of the document in step 33, and
The difference angle due to the incorrect insertion angle of the original is corrected.

〔Effect of the invention〕

As is clear from the above description, according to the present invention, the difference angle between the reference horizontal line of the document and the horizontal scanning direction is determined, and correction is performed based on this to make the horizontal reference line and the scanning direction coincide. Even if the original is inserted in an irregular direction, there will be no mismatch between the horizontal direction of the original and the horizontal scanning direction, resulting in a good recorded image on the receiving side, and a remarkable effect can be obtained in facsimile machines for various uses.

[BRIEF DESCRIPTION OF THE DRAWINGS] The figures show an embodiment of the present invention, FIG. 1 is a block diagram corresponding to the first method, FIG. 2 is a flow chart 1 showing the operation status of FIG. 1, and FIG. is a block diagram corresponding to the second method,
FIG. 4 is a flowchart 1 showing the operation status of FIG. 3. ■...Scanner, 2...Correction circuit, 3...
Angle determination circuit, 4...Data conversion circuit.

Claims (2)

[Claims] (1) In a facsimile machine that performs horizontal scanning in a direction perpendicular to the feeding direction of a document, a reference horizontal line is provided on the document, and when reading the document in the horizontal scan, a difference angle between the horizontal scanning direction and the reference horizontal line is determined; A horizontal correction method for a facsimile machine, characterized in that the horizontal scanning direction is corrected to match a reference horizontal line based on this difference angle. (2) In a facsimile machine that performs horizontal scanning in a direction perpendicular to the feeding direction of a document, a reference horizontal line is provided on the document, and a difference angle between the horizontal scanning direction and the reference horizontal line is determined when reading the document in the horizontal scanning; A horizontal correction method for a facsimile machine, characterized in that the image data of the read output is corrected based on the difference angle, and the reference horizontal line and the horizontal direction of the image data are made to coincide with each other.