JP3314279B2 - Copying method and apparatus - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a copying method and apparatus for easily enlarging or reducing a recorded image.

[0002]

2. Description of the Related Art Conventionally, a copying apparatus 50 as shown in FIG. 4 is known. The copying apparatus 50 shown in FIG.
A line-type reading sensor 52 using, for example, a line image sensor for reading the document 51, and a reading-side driving unit 53 for relatively moving the document 51 with respect to the line-type reading sensor 52 are provided. For example, a line type recording head 55 using a line thermal head for performing recording on a recording medium, and a recording side driving unit 56 for relatively moving the recording paper 54 with respect to the line type recording head 55 are provided. Reference numeral 57 denotes an image processing unit; and 58, an image memory.

Therefore, at the time of reading, the original 51 moves at a constant speed by the operation of the reading side driving unit 53, the original 51 is read by the line type reading sensor 52, and the read image data is stored in the image memory 58. It is memorized. On the other hand, at the time of recording, the recording paper 54 moves at a constant speed by the operation of the recording side driving unit 56, and the image data read from the image memory 58 is supplied to the line type recording head 55, so that the recording paper 54 is recorded on the recording paper 54. Is performed. When the recorded image is enlarged or reduced, the image processing unit 5
7, data processing is performed on the image data, and recording is performed using the processed image data.

[0004]

Incidentally, in the above-described conventional copying apparatus 50, since the pixel densities of the line-type reading sensor 52 and the line-type recording head 55 in the main scanning direction are fixed, the reading is basically performed. Further, one pixel has a constant copy magnification recorded as one recording pixel. Therefore, when the image is relatively enlarged or reduced with respect to the fixed copy magnification, it is necessary to perform data processing on the image data, and the image processing unit 57 for data processing is required. Become more complex,
In addition, there is a problem that the cost is increased and the quality of the scaled image is deteriorated due to the data processing.

The present invention has solved the above-mentioned problems in the prior art, and greatly simplified the configuration of the data processing system, reduced the cost, and greatly improved the quality of the enlarged / reduced recorded image. It is an object of the present invention to provide a copying method and apparatus which can be improved.

[0006]

In the copying method according to the present invention, the original 3 is read by the line-type reading sensor 2 and the read image is read by relatively moving the line-type reading sensor 2 and the original 3 during reading. The data S 'is stored in the image memory 4 and at the time of recording,
, The image data S in the direction orthogonal to the main scanning direction of the line-type reading sensor 2 is sequentially read out, and the line-type recording head 5 and the recording paper 6 are relatively moved. At the time of recording, at the time of enlarged recording, the relative movement speed between the line-type reading sensor 2 and the document 3 is reduced, and the line-type recording head 5 and the recording paper 6 are moved.
Are increased, the image data "11", "12",... For one line of the line type recording head 5 are increased.
Is repeated every n lines, and the pitch between the lines is reduced by 1 /
On the other hand, at the time of reduced recording, the relative movement speed between the line-type reading sensor 2 and the document 3 is increased, and the relative movement speed between the line-type recording head 5 and the recording paper 6 is reduced. .

On the other hand, the copying apparatus 1 according to the present invention
Line-type reading sensor 2 for reading an image, and a reading-side drive unit Vr for relatively moving the line-type reading sensor 2 and the document 3
And an image memory 4 for storing image data S 'read by the line-type reading sensor 2, and a reading function for sequentially reading out image data S from the image memory 4 in the direction orthogonal to the main scanning direction of the line-type reading sensor. In a copying apparatus including a control unit 7, a line-type recording head 5 for performing recording on the recording paper 6, and a recording-side driving unit Vp for relatively moving the line-type recording head 5 and the recording paper 6, a line-type reading sensor 2 is provided. , The relative moving speed of the line-type recording head 5 and the recording paper 6 are increased, and the image data “11”, “12” for one line of the line-type recording head 5 are also reduced. Is repeated every n lines, and recording is performed by setting the pitch between lines to 1 / n. On the other hand, the relative movement speed between the line-type reading sensor 2 and the original 3 is increased. Comb, and characterized by being configured to perform reduction recording by as small as the line type recording head 5 relative moving speed of the recording sheet 6.

[0008]

According to the copying method and the copying apparatus 1 of the present invention, when reading, the line-type reading sensor 2 and the original 3 move relative to each other by the operation of the reading-side driving unit Vr. The reading of the original 3 is performed by the scanning in the direction and the relative movement in the sub-scanning direction. On the other hand, the read image data S ′ is stored in the image memory 4.
Is stored. At this time, the address position of the image data S stored in the image memory 4 corresponds to, for example, a pixel position in the document 3.

On the other hand, at the time of recording, image data S in the direction orthogonal to the main scanning direction of the line-type reading sensor are sequentially read from the image memory 4 and the read image data S is sent to the line-type recording head 5. Supplied. Further, the recording paper 6 and the line type recording head 5 are connected to the recording side driving unit V
Since the relative movement is performed by the operation of p, the recording on the recording paper 6 is performed by the scanning in the main scanning direction by the line type recording head 5 and the relative movement in the sub-scanning direction.

In this case, the relative movement speed of the line-type reading sensor 2 and the original 3 can be changed by the reading-side driving unit Vr, and the relative movement of the line-type recording head 5 and the recording paper 6 by the recording-side driving unit Vp. Since the speed is variable, for example, when reducing the recorded image, the relative movement speed of the line-type reading sensor 2 and the original 3 by the reading-side driving unit Vr is increased by the speed command of the control unit 7 and the recording is performed. What is necessary is just to reduce the relative moving speed of the line type recording head 5 and the recording paper 6 by the side drive unit Vp. On the other hand, when enlarging the recorded image, the relative movement speed between the line-type reading sensor 2 and the document 3 is reduced by the speed command of the control unit 7 and the relative movement speed between the line-type recording head 5 and the recording paper 6 is increased. do it. Note that if the magnification of enlargement is increased, a gap is generated between pixels in the recorded image.
The image data “1” for one line of the line type recording head 5
.. Are repeatedly recorded n lines at a time, or each pixel data "11", "21"... In the read image data S 'is multiplied by n and stored in the image memory 4. Recording is performed with the pitch between lines set to 1 / n. Thereby, the generation of the gap is prevented. In this case, recording with the pitch between lines set to 1 / n means
This means that the pitch is 1 / n of the pitch between the lines when the relative movement speed between the line type recording head 5 and the recording paper 6 is increased.

[0011]

Next, preferred embodiments according to the present invention will be described in detail with reference to the drawings.

First, the basic configuration of a copying apparatus 1 according to the present invention will be described with reference to FIG.

A copying apparatus 1 shown in FIG. 1 has a line-type reading sensor 2 using a line image sensor for reading the document 3 on the reading side, and a document for moving the document 3 relatively to the line-type reading sensor 2. A reading-side drive unit Vr including a feed roller mechanism 11 and a drive motor mechanism 12 is provided. In this case, the line-type reading sensor 2 is arranged along the horizontal direction of the document 3, and the document 3 is relatively moved by the document feed roller mechanism 11 in the direction orthogonal to the line-type reading sensor 2. Note that the reading-side driving unit Vr can change the speed at which the document 3 is moved.

On the recording side, a line type recording head 5 using a line thermal head for recording on recording paper 6 is provided.
And a recording paper feed roller mechanism 13 and a drive motor mechanism 1 for moving the recording paper 6 relatively to the line type recording head 5.
4 is provided. In this case, the line type recording head 5 is arranged along the longitudinal direction of the recording paper 6, and the recording paper 6 is relatively moved by the document feed roller mechanism 13 in a direction perpendicular to the line type recording head 5.
The recording-side drive unit Vp can change the speed at which the recording paper 6 is relatively moved.

On the other hand, an image memory 4 using a RAM and a control unit 7 for various controls are provided so that the image data S 'obtained from the line-type reading sensor 2 can be written in the image memory 4. Is configured to be recordable on recording paper 6 by a line type recording head 5. In this case, the control unit 7 has a write control function for the image memory 4, that is, the line type read sensor 2
Has a write control function of sequentially writing the image data S 'read by the
, That is, a read control function for sequentially reading image data S from the image memory 4 in the direction orthogonal to the main scanning direction of the line-type reading sensor 2. Further, the control unit 7 has a writing control function of multiplying each pixel data “11”, “21”,. Furthermore, the control unit 7 has a motor control function of giving a speed command to the drive motor mechanism 12 or 14 to operate, stop operation, or change the speed, respectively.

Next, the operation of the copying apparatus 1 including the copying method according to the present invention will be described.

First, at the time of reading, the original 3 moves at a set constant speed by the operation of the reading side driving unit Vr, and the original 3 is read by the line type reading sensor 2. That is, the line-type reading sensor 2 scans in the main scanning direction and relatively moves in the sub-scanning direction.
Are sequentially read by the line-type reading sensor 2, and the read image data S ′ are sequentially stored in the image memory 4. In this case, the image data S stored in the image memory 4
As shown in FIG. 2, the address positions are stored in correspondence with the pixel positions in the document 3, and for example, "11", "2"
1 "," 31 "..." N1 "," 12 "," 22 "," 3 "
2 "..." N2 "," 13 "," 23 "..." N3 "..." N
N ′ ”.

On the other hand, at the time of recording, image data S in the direction orthogonal to the main scanning direction of the line type reading sensor 2 is sequentially read from the image memory 4. That is, as shown in FIG. 2, “11”, “12”, “13”... “1N ′”, “2”
1 "," 22 "," 23 "..." 2N '"," 31 ",
"32", "33"... "3N '"... "NN'" in that order, and the read image data S is supplied to the line type recording head 5 side. In addition, the recording paper 6 moves at a preset constant speed by the operation of the recording side driving unit Vp, and the recording is performed on the recording paper 6 by the line type recording head 5. In this case, the line type recording head 5 performs scanning in the main scanning direction and relatively moves in the sub scanning direction, so that recording is sequentially performed on the recording paper 6.

On the other hand, at the time of enlargement recording or reduction recording, a speed command is given from the control unit 7 to the reading side driving unit Vr, and the rotation speed of the driving motor 12, that is, the relative speed of the line type reading sensor 2 and the original 3 is The moving speed is set. Further, a speed command is given from the control unit 7 to the recording side drive unit Vp, and the rotation speed of the drive motor 14, that is, the relative movement speed between the line type recording head 5 and the recording paper 6 is set.

Therefore, for example, if the relative moving speed of the document 3 by the reading side driving unit Vr is set to be large and the relative moving speed of the recording paper 6 by the recording side driving unit Vp is set to be small, the recorded image can be reduced. On the other hand, if the relative moving speed of the document 3 is set low and the relative moving speed of the recording paper 6 is set high, the recorded image can be enlarged. That is, in FIG. 2, Rx is the pixel pitch at the time of reading in the main scanning direction by the line-type reading sensor 2, Ry is the pixel pitch at the time of reading in the sub-scanning direction by the line-type reading sensor 2, and Px is the sub-scanning by the line-type recording head 5. Assuming that the recording pixel pitch in the X direction and Py is the recording pixel pitch in the main scanning direction by the line type recording head 5, the magnification in the X direction (lateral direction) is Px
Since / Rx and the Y-direction (vertical) magnification are Py / Ry, for example, in order to reduce the magnification by 90%, Px = Rx · 0.9 and Ry = Py / 0.9. Just set it.

In the case of magnification (magnification or reduction only in one of the vertical and horizontal directions), the relative speed of only one of the reading-side driving unit Vr and the recording-side driving unit Vp may be changed.

If the image data S 'is left as it is at the time of enlarged recording, a gap is generated between pixels in the recorded image. Therefore, image data for one line of the line type recording head 5 is repeatedly recorded every n lines. Along with
Either record with the pitch between lines set to 1 / n, or
Each pixel data “1” in the read image data S ′
As shown in FIG. 3, "1", "21",... Are stored repeatedly n times, and the pitch between lines is recorded at 1 / n. For example, in order to enlarge at a magnification of 110%, the pitch between lines at the time of printing may be printed by 1.1 times.
If it is equal to x, a gap of about 10% occurs between the lines. Therefore, in this case, n =
2, the same image data is recorded every two lines, and the recording pitch is set to Px = 1.1 / 2 · Rx
= 0.55 · Rx prevents the generation of the gap. The pitch in the sub-scanning direction at the time of reading may be Ry = Py / 1.1.

The embodiment has been described in detail above.
The present invention is not limited to such an embodiment.
For example, at the time of reading, the relative movement between the line-type reading sensor and the original is made variable and the speed of the relative movement is made variable. In this case, the same effect can be obtained even if the reading time (reading cycle) of one line in the line-type reading sensor is made variable. Get. Therefore, "variable speed at which the line-type reading sensor and the original are relatively moved" is synonymous with "variable one-line reading time (reading cycle) in the line-type reading sensor". During recording, the line type recording head and the recording paper are relatively moved,
The relative movement speed is made variable. In this case, the same effect can be obtained by changing the recording time (recording cycle) of one line in the line type recording head. Therefore,
"Variable speed at which the line-type recording head and the recording paper are relatively moved" has the same meaning as "variable one-line recording time (recording cycle) in the line-type recording head". Note that a control system for the reading time or the recording time of one line is indicated by a dotted line in FIG.

Further, any sensor or head having the same function can be used as the line-type reading sensor or the line-type recording head. Furthermore, the line type reading sensor or the line type recording head may be one having a length of 1 / M of the entire width and reciprocated M times to read or record the entire surface. The “recording paper” in the present invention is a concept including not only paper but also all recordable sheet recording media such as a resin recording film. In addition, it is possible to arbitrarily change the detailed configuration, method, and the like without departing from the gist of the present invention.

[0025]

As described above, the copying method according to the present invention provides:
At the time of enlarged recording, the relative movement speed between the line-type reading sensor and the document is reduced, and the relative movement speed between the line-type recording head and the recording paper is increased. The recording is repeated and the pitch between lines is reduced to 1 / n. On the other hand, during reduced recording, the relative movement speed between the line-type reading sensor and the document is increased, and the relative movement speed between the line-type recording head and the recording paper is decreased. Therefore, the configuration of the data processing system can be greatly simplified, the cost can be reduced, and the quality of the enlarged and reduced recorded image can be significantly improved.

Further, the copying apparatus according to the present invention reduces the relative movement speed between the line-type reading sensor and the original, increases the relative movement speed between the line-type recording head and the recording paper, and reduces the relative movement speed of the line-type recording head. The image data for the lines is repeated n lines at a time, and the pitch between the lines is reduced by 1 /
Enlarged recording is performed by recording at n, while reduced recording is performed by increasing the relative movement speed between the line-type reading sensor and the original and decreasing the relative movement speed between the line-type recording head and the recording paper. With such a configuration, there is an effect that the copying method can be performed reliably and easily.

[Brief description of the drawings]

FIG. 1 is a diagram showing the principle configuration of a copying apparatus according to the present invention;

FIG. 2 is an operation explanatory view for explaining a copying method according to the present invention;

FIG. 3 is another operation explanatory diagram for explaining the copying method;

FIG. 4 is a diagram showing the principle configuration of a copying apparatus according to the related art;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Copier 2 Line type reading sensor 3 Original 4 Image memory 5 Line type recording head 6 Recording paper 7 Control part S Image data S 'Image data Vr Reading side driving part Vp Recording side driving part

Continuation of the front page (56) References JP-A-61-57176 (JP, A) JP-A-2-289369 (JP, A) JP-A-62-247673 (JP, A) Jpn. , U) (58) Fields surveyed (Int. Cl. ⁷ , DB name) H04N 1/04-1/207 H04N 1/393

Claims (2)

(57) [Claims] 1. A reading device according to claim 1, further comprising: reading the document by a line-type reading sensor and storing the read image data in an image memory; In a copying method of sequentially reading image data in a direction orthogonal to the main scanning direction of the type reading sensor and moving the recording paper relative to the line type recording head, recording is performed on the recording paper by the line type recording head. Sometimes, the relative movement speed between the line-type reading sensor and the document is reduced, and the relative movement speed between the line-type recording head and the recording paper is increased, and image data for one line of the line-type recording head is Recording is repeated every n lines, and the pitch between lines is set to 1 / n. And a relative moving speed between the line-type reading sensor and the document is increased, and a relative moving speed between the line-type recording head and the recording paper is reduced. 2. A line-type reading sensor for reading a document, a reading-side drive unit for relatively moving the line-type reading sensor and the document, an image memory for storing image data read by the line-type reading sensor, and an image memory A control unit having a reading function for sequentially reading image data in a direction orthogonal to the main scanning direction of the line-type reading sensor, a line-type recording head for recording on recording paper, and a line-type recording head and recording paper relative to each other. In a copying apparatus including a recording-side driving unit for moving, the relative movement speed between the line-type reading sensor and the document is reduced, and the relative movement speed between the line-type recording head and the recording paper is increased. By repeating image data of one line of a line type recording head by n lines and recording with a pitch between lines of 1 / n A configuration in which enlarged recording is performed, and reduced recording is performed by increasing the relative movement speed between the line-type reading sensor and the document and decreasing the relative movement speed between the line-type recording head and the recording paper. A copying apparatus characterized by the following.