JP3099353B2 - Facsimile machine - Google Patents

Description

Description: BACKGROUND OF THE INVENTION The present invention relates to an image reduction method, and in particular, is determined according to the size of image data to be recorded and the size of prepared recording paper. The present invention relates to an image reduction method for reducing an image at a reduction ratio.

(Prior Art) When recording image information received by a facsimile apparatus on recording paper cut to a fixed size, the size of the original of the received image information is different from the size of the recording paper prepared in the receiver. Sometimes.

When the recording paper is larger than the document, the image information may be printed without being reduced, but when the recording paper is smaller than the document, the received image information needs to be reduced and printed.

Conventionally, the reduction ratio of a received document has been determined as follows.

First, an allowable dimension of the document that can be reduced in the sub-scanning direction is determined in advance. The allowable size of the document is a size obtained by adding a fixed size x to the size (that is, length) S in the sub-scanning direction of the recording paper. That is, the original up to the allowable size (S + x) is reduced and printed on one sheet of recording paper. The reduction ratio C = S / (S + x) in this case is the maximum reduction ratio.

Reduction ratio when original length D is in the range of S to (S + x)
The document is printed in reduced size by S / D, and is printed without reduction when the length of the document is at the S end. If the length of the document is equal to or larger than the allowable dimension (S + x), if the document is reduced and stored on one sheet of paper, it becomes too small to be easily viewed. Was printed separately.

(Problems to be Solved by the Invention) The above-mentioned prior art has the following problems.

In the printing by the above-described reduction method, even if the size of the recording paper is different, the size of the original is reduced based on whether the length D of the original is larger than the length S of the recording paper by a certain threshold value x or more. Or not. Therefore, the maximum reduction rate differs depending on the size of the recording paper.

That is, the ratio of the threshold value x is higher in a small recording sheet than in the case of a large recording sheet, and the maximum reduction rate is larger than in the case of printing on a large recording sheet.

As a result, a document requiring a high resolution, such as a precise drawing, is too small to be easily viewed. In the case of such a document, it is more desirable to print a large amount at a small reduction ratio even if the document is divided into a plurality of sheets, rather than printing on a single recording sheet after being extremely reduced at a large reduction ratio.

SUMMARY OF THE INVENTION It is an object of the present invention to provide an image reduction method which solves the above-mentioned problems and prevents a document from being reduced extremely small beyond a preset reduction ratio.

(Means and Actions for Solving the Problems) In order to solve the above problems and achieve the object, the present invention provides a storage unit for storing a reference reduction ratio of a received document in advance, a recording paper length and Determining means for determining a maximum length of a document that can be reduced and recorded at one of the recording sheets prepared based on the reference reduction ratio at the reference reduction ratio;
Comparing means for comparing the maximum length determined by the determining means with the length of the received document; and a reduction rate (10 or less) smaller than the reference reduction rate when the received document is longer than the maximum length.
(Including 0%), the received document is reduced and divided into two or more sheets of recording paper for printing. On the other hand, if the received document is within the same length as the recording paper or within the maximum length, recording is performed. Reduction rate according to the length of paper and received original (= length of recording paper /
The first feature is that a printing means for reducing the size of the received document by the length of the received document and printing it is provided.

Further, the present invention has a second feature in that the type of print processing by the printing means is determined for a document reduced according to the width of the recording paper.

In the present invention having the above configuration, even if the document is longer than the allowable dimension calculated according to the preset reference reduction ratio, the document is not reduced at a reduction ratio higher than the reference reduction ratio.

Therefore, even when the dimensions of the recording paper are variously different,
Since the maximum reduction ratio for reducing the original can be fixed,
A document for which a high resolution is desired is not extremely reduced.

In other words, when extremely small recording paper is set in the receiver for the original, the received image information is reduced according to a reduction ratio within a limit capable of maintaining high resolution, or two or more sheets are recorded without reduction. It is divided and recorded on paper.

Hereinafter, the present invention will be described in detail with reference to the drawings. Second
FIG. 1 is a block diagram showing a hardware configuration of a facsimile apparatus showing one embodiment of the present invention.

In FIG. 1, image information taken in from a line via a modem 2 is temporarily converted into image data by a decoding unit 3 in order to count the number of lines. Then, the image data is compressed and coded again by the coding unit 4 to save memory, and then stored in the image memory 5.

The image information in the image memory 5 is sequentially read out and printed by the recording unit 6 in accordance with a command from the system control unit 1. Since the image information in the image memory 5 is a compressed code, it is temporarily converted into image data by the decoding unit 3 at the time of printing. Note that the image data is reduced by the reduction unit 7 as necessary. The reduction ratio set in the reduction unit 7 is determined based on a criterion described later.

The system control unit 1 is configured by a microcomputer, and a program for operating the microcomputer and management data are stored in a management memory 8 including a ROM and a RAM.

 Hereinafter, the operation of the present embodiment will be described.

First, with reference to FIG.
A procedure for calculating an allowable dimension of a document that can be recorded on a sheet of recording paper will be described.

In FIG. 3, in step S1, the length S of the recording paper prepared in the receiver is read.

In step S2, the maximum reduction rate C is read. The maximum reduction rate C is an arbitrary value based on the permissible limit of resolution degradation and is a value that is set in the RAM in advance.

In step S3, the allowable dimension Dmax of the document is calculated by the following equation based on the length S of the recording sheet and the maximum reduction ratio C.

Allowable dimension Dmax = length of recording paper S / maximum reduction rate C (1) In step S4, the allowable dimension is converted into the number A of image information reading lines. A = D × L (L is the number of lines per 1 mm) In step S5, the determined number of lines A is stored in the RAM as a threshold value.

Next, the recording operation of the received data will be described with reference to FIG.

In step S10, a threshold value, that is, the line number A is read.

In step S11, the count value B of the line counter is cleared.

In step S12, the image data is sent to the
Line transfer.

In step S13, the count value B of the line counter is incremented.

In step S14, it is determined whether or not the count value B has exceeded the threshold value A.

If the count value exceeds the threshold value A, it is determined that printing cannot be performed on one sheet of recording paper by the reduction at the predetermined reduction ratio, and the process proceeds to step S15.

In step S15, a reduction ratio of 100% is set in the reduction unit 7.

On the other hand, until the count value B exceeds the threshold value A, it is determined that printing can be performed on one sheet of recording paper even if the image is reduced below the maximum reduction ratio, and the process proceeds to step S16.

In step S16, it is determined whether or not all the image data for one page has been transferred to the encoding unit 4.
If the image data for the page has not been transferred, the process proceeds to step S12.

If it is determined that all the image data for one page has been transferred, the process proceeds to step S17.

In step S17, it is determined whether or not the count value B is larger than a numerical value E (E = S × L) corresponding to the length of the recording paper.

If the count value B is larger than the numerical value E corresponding to the length of the recording paper, the process proceeds to step S18, where the reduction ratio E / L is calculated and set in the reduction unit 7.

The count value B is a numerical value E corresponding to the length of the recording paper.
If it is smaller, the printing can be performed on one sheet of recording paper without reducing the size.
Set to.

In step S19, the image data is reduced according to the reduction ratio, and in step S20, recording is performed based on the reduced image data.

Next, the main functions of the present embodiment for performing the above operation will be described. FIG. 1 is a block diagram showing the main functions of the present embodiment.

In the figure, a maximum reduction ratio that does not degrade the resolution is set in the maximum reduction ratio storage unit 9 in advance. In the storage paper size storage unit 10, the length of the recording paper set in the receiver is set.

The allowable document size calculation unit 11 calculates the allowable size (length) of a document that can be reduced at the maximum reduction ratio and printed on one sheet of recording paper based on the maximum reduction ratio and the recording paper size.

The line counter 12 counts the number of lines of image data of one page of document image information. The reduction necessity determination section 13 determines whether or not to perform reduction based on the number of lines and the allowable size of the document.

The reduction ratio calculation unit 14 calculates the reduction ratio based on the determination result of the reduction necessity determination unit 13. That is, when reduction is necessary, the reduction ratio is calculated based on the counted number of lines, that is, the length of the document and the allowable size of the document.

 The calculated reduction ratio is set in the reduction unit 7.

On the other hand, if no reduction is required, the fixed reduction rate storage unit
A reduction ratio preset in 15 is set in the reduction unit 7. The reduction ratio in this case is a reduction ratio smaller than the maximum reduction ratio including 100%.

Next, a reduction method in consideration of a case where the width of the original is larger than the width of the recording paper will be described.

In FIG. 5, first, in step S50, the main scanning direction dimension, that is, the width data DB of the document sent from the transmitting station is read.

 In step S51, the width SB of the recording paper is read.

In step S52, the width data DB of the document is compared with the width SB of the recording paper.

If the width SB of the recording paper is larger, the processing shown in the flowchart of FIG. 4 is performed.

On the other hand, when the width DB of the document is larger, the process proceeds to step S53, and the reduction is performed by applying the reduction ratio SB / DB (C ′) to the length and width of the image information.

In step S54, C / C 'is set as the maximum reduction rate C in step S2.

In step S55, it is determined whether or not C is 100% or more.
If it is 100% or more, C is set to 100% in step 56.

After reducing the image information, the processing shown in the flowchart of FIG. 4 is performed.

That is, if the width of the received document is larger than the width of the recording paper, first, the image information is reduced so that the width of the document becomes the same as the width of the recording paper, and the reduced image information is targeted. Further, it is determined whether or not the size in the sub-scanning direction is larger than the allowable dimension, and whether or not reduction is necessary is examined.

As described above, according to the present embodiment, the maximum reduction rate is determined in advance, and 1 is set so that the maximum reduction rate is maintained.
The permissible size of a document that can be printed on a single sheet of recording paper is determined for each size of recording paper.

(Effects of the Invention) As is clear from the above description, according to the present invention, even if the size of the recording paper changes, the maximum reduction ratio is always constant, so that a precise document requiring high resolution can be used. It is possible to eliminate the problem that the recording paper is extremely reduced and recorded by the recording paper.

[Brief description of the drawings]

FIG. 1 is a functional block diagram showing an embodiment of the present invention, FIG. 2 is a block diagram showing a hardware configuration of a main part of a facsimile machine, FIG. 3 is a flowchart for determining an allowable dimension of a document, and FIG. Flow chart of the process, FIG.
6 is a flowchart illustrating the operation of the embodiment. DESCRIPTION OF SYMBOLS 1 ... System control part, 2 ... Modem, 3 ... Decoding part, 4 ... Encoding part, 5 ... Image memory, 6 ... Recording part, 7 ... Reduction part, 9 ... Maximum reduction rate Storage unit 10, recording paper size storage unit 11, original allowable dimension calculation unit 12, line counter 13, reduction necessity determination unit 14, reduction ratio calculation unit 15, fixed reduction ratio Memory

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) H04N 1/38-1/393 G06T 3/40

Claims (2)

(57) [Claims] A detecting means for detecting a length of a prepared recording sheet; a storing means for storing a reference reduction ratio of a received document in advance; Determining means for determining a maximum length of a document that can be reduced and recorded on one of the prepared recording sheets at the reference reduction rate based on the reference reduction rate; Comparing means for comparing the length and the length of the received document; and when the received document is longer than the maximum length, reducing the received document by two at a reduction rate (including 100%) smaller than the reference reduction rate. On the other hand, when the received original is within the range of the same length as the recording paper or within the maximum length, the reduction ratio according to the length of the recording paper and the received original (= Reduce the received document by (recording paper length / received document length) A facsimile apparatus comprising: a printing means for performing printing. 2. A detecting means for detecting a length and a width of a prepared recording sheet; a storing means for storing a reference reduction ratio of a received document in advance; and a width of the recording sheet detected by the detecting means. When the width of the received document is larger, a reduction unit that reduces the received document at a reduction ratio (= width of the recording paper / width of the document) corresponding to the width of the recording paper and the width of the received document; Determining means for determining, based on the length of the recording paper and the reference reduction ratio, a maximum length of a document which can be reduced and recorded on one of the prepared recording sheets at the reference reduction ratio; Comparing means for comparing the maximum length determined by the means and the length of the received document reduced by the reducing means; and when the received document reduced by the reducing means is longer than the maximum length, smaller than the reference reduction rate. The reduction at the reduction ratio (including 100%) The received document is further reduced and divided into two or more sheets of recording paper for printing. On the other hand, when the received document is within the same length as the recording paper or within the maximum length, the recording paper and the receiving paper are received. Reduction rate according to original length (=
A facsimile apparatus, further comprising printing means for further reducing and printing the received document reduced by (length of recording paper / length of received document).