JP2002330282A - Image forming device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an image forming device for forming a natural image adapted to image data acquired from the outside by converting the resolution of the image data acquired from the outside into apparently four or eight times as high as that of the image data. SOLUTION: The natural image obtained by apparently converting the resolution of an image can be formed by generating image data on interpolation lines on the basis of two mutually adjacent lines in order to add a plurality of interpolation lines between mutually adjacent lines of image data acquired from the outside. The closer is an interpolation line to the image data acquired from the outside, the larger dots on the interpolation line are formed, and a smooth image can thereby be formed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an LED (Light Emitting Diode) for displaying an image
e) facsimile machine, copier,
The present invention relates to an image forming apparatus such as a printer.

[0002]

2. Description of the Related Art An image is formed in a moving direction of a recording paper (sub-scanning direction) and a direction perpendicular to the moving direction (main scanning direction).
It is recorded by forming a plurality of dots (pixels). LED printers are LEs with multiple LEDs aligned.
The D array is used as an optical writing light source, and the LED array is arranged near the side surface of the photosensitive drum and parallel to the rotation axis of the photosensitive drum, and by driving each LED in parallel, the photosensitive drum is conveyed by rotation. One line can be printed in the main scanning direction with one light emission on the recorded recording paper.

[0003]

When an image is formed by an LED array, since the LEDs are driven in parallel as described above (that is, the light emission time of each LED is the same), the same in the main scanning direction. Each dot on the line is formed in the same size. Further, since the number of LEDs cannot be changed, the resolution in the main scanning direction cannot be converted.

The sub-scanning direction is described in Japanese Patent Laid-Open No. 9-233.
As proposed in Japanese Patent Publication No. 36/36, etc., by adding one interpolation line between adjacent lines, a resolution of 2
Can be converted to double. In this proposal, as shown in FIG. 9, the image data on the interpolation line includes both the n-th dot on the N-th line and the n + 1-th dot (or the (n-1) -th dot) on the N + 1-th line. If it is black data,
Between the n-th dot on the N-th line and the n-th dot on the (N + 1) -th line, and the (n + 1) -th dot (or the (n-1) -th dot) on the N-th line, and (n + 1) on the (N + 1) -th line A dot to be added between the dot (or the (n-1) th dot) is generated so as to correspond to the black data. Also, by making the light emission time of the LED corresponding to the image data on the interpolation line generated by the above method shorter than the light emission time of the LED corresponding to the image data acquired from the outside, the dots on the interpolation line are Is formed smaller than the dots corresponding to the image data obtained from the above, and a smooth image can be obtained.

However, in the above-mentioned method, a straight line intersecting at a large angle with respect to the main scanning direction cannot be sufficiently smoothed. On the other hand, in recent years, the resolution of printers has been increased, and especially when the image data is facsimile received image data or the like, the conversion of the resolution of 4 times or 8 times is required. However, there has been no image forming apparatus capable of responding to resolution conversion of 4 times and 8 times.

The present invention has been made in view of the above circumstances, and a plurality of interpolation lines are added between adjacent lines of image data obtained from the outside, so that a large angle with respect to the main scanning direction can be obtained. Intersecting straight lines can be expressed smoothly, the resolution can be converted to 4 times or 8 times, and the dots on the interpolated lines are formed larger by the dot size changing section as the interpolated lines are closer to the lines of image data obtained from the outside. Accordingly, it is an object to provide an image forming apparatus capable of forming a smooth image. Another object of the present invention is to generate image data corresponding to dots on an interpolation line based on image data of two adjacent lines,
It is an object of the present invention to provide an image forming apparatus that converts an apparent resolution of an image to form a natural image. Still another object of the present invention is to form an image with an LED array, change the emission time of the LED corresponding to the image data of a plurality of interpolation lines between adjacent lines for each line, and obtain image data obtained from outside. It is an object of the present invention to provide an image forming apparatus that forms a larger dot by increasing the light emission time of the corresponding LED as the interpolation line is closer to the line, and forms a smooth image.

[0007]

According to a first aspect of the present invention, there is provided an image forming apparatus for converting a resolution by adding an interpolation line between adjacent lines of acquired image data. In addition, the image data generating unit includes an image data generating unit that generates image data corresponding to dots on the interpolation line, and a dot size changing unit that changes the dot size for each line. In the case of the first invention, the resolution of the image is converted to four times or eight times by adding a plurality of interpolation lines between adjacent lines of the image data acquired from the outside, and the dot size changing unit performs When the dots on the interpolation line are formed larger as the interpolation line is closer to the line of the image data acquired from the outside, it is possible to realize an image forming apparatus that forms a smooth image.

The image forming apparatus according to a second aspect of the present invention is the image forming apparatus according to the first aspect, wherein the image data generating section determines the image data corresponding to the dot on the interpolation line based on the image data of two adjacent lines. Is generated. In the case of the second invention, the apparent resolution of the image is converted by generating image data corresponding to dots on the interpolation line based on the image data of two adjacent lines, and An image forming apparatus that forms a suitable natural image can be realized.

The image forming apparatus according to a third aspect of the present invention is the image forming apparatus according to the first or second aspect, wherein the acquired image data and the image data generated by the image data generating section are provided to the LED array in line units. An image is formed by the LED array, and the dot size changing unit is configured to change the emission time of the LED corresponding to the image data of the plurality of interpolation lines between adjacent lines of the obtained image data line by line. It is characterized by the following. According to the third aspect, since an image is formed by the LED array, when the light emission time of the LED is long, the dot corresponding to the LED is formed large, and when the light emission time of the LED is short, the dot corresponding to the LED is formed. It is formed small. Therefore, the light emission time of the LED corresponding to the image data of the plurality of interpolation lines between adjacent lines of the image data obtained from the outside changes for each line, and the interpolation line closer to the line of the image data obtained from the outside, When the dots are formed to be large by extending the emission time of the corresponding LED, an image forming apparatus that forms a smooth image can be realized.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the drawings showing the embodiments. FIG. 1 is a block diagram showing a main configuration of a facsimile apparatus according to the present invention. This facsimile apparatus includes a main control unit 1, a reading unit 2, a display unit 3, an operation unit 4, a ROM 5, a RAM 6, an image memory 7, a modem 8, an NCU (Network Control Unit) 9, a dot size changing unit 12, a light emission control unit. 14, image data generation unit 16
Are connected to each other via a bus 10.

The main control unit 1 comprises a CPU.
According to the computer program stored in OM5,
The above hardware components of the facsimile apparatus are controlled via a bus 10. The reading unit 2 is, for example, CC
This is a scanner using D (Charge Coupled Device), reads an original, and outputs dot image data. The display unit 3 is a display device such as a liquid crystal display device or a CRT display, and displays the operation status of the facsimile apparatus, and displays image data of a document read or image data received for transmission. The operation unit 4 includes a character key, a numeric keypad, a speed dial key, a one-touch dial key, an input key for inputting how many times the resolution of an image is to be converted, and various function keys necessary for operating the facsimile machine. Have. When the input key is used to input how many times the resolution is to be converted, a resolution signal CH indicating the input magnification is given to the dot size changing unit 12. By using the touch panel type display unit 3, some or all of the various keys of the operation unit 4 can be substituted.

The ROM 5 stores various programs necessary for the operation of the facsimile machine in advance. RAM6 is S
It is composed of a RAM or a flash memory and temporarily stores data generated when the program is executed.
The image memory 7 is composed of a DRAM or the like, and stores image data to be transmitted or received image data. The modem 8 is directly connected to the NCU 9, and the NCU 9 opens and closes the public telephone network, and connects the modem 8 to the public telephone network as necessary.

The image data generator 16 is provided with two adjacent lines LA1, L2 of the image data read from the image memory 7.
A first line memory 18 and a second line memory 19 in which image data of A2 are stored, respectively;
And a third line memory 20 for storing the image data calculated by the OR circuit 17. The image data stored in each line memory is supplied to the light emission control unit 14 as needed. The dot size changing unit 12 is configured to control the LE corresponding to the image data read from the image memory 7 and the image data generated by the image data generating unit 16.
A strobe signal S defining the light emission time of D is generated, and the strobe signal S is given to the light emission control unit. The light emission control unit 14 causes the LED corresponding to the given image data to emit light for a time specified by the strobe signal S, and causes the image forming unit 15 to record an image on a recording sheet.

FIG. 2 is a block diagram showing the main configuration of the dot size changing unit 12. As shown in FIG. The dot size changing unit 12
Strobe signals SA, SB, SC, SD for defining the emission time of the LED corresponding to the image data on each line LA and each of the interpolation lines LB, LC, LD of the image data obtained from the outside and stored in the image memory 7. And strobe signal generators 21A, 21B, 21C, and 21D for generating the same. When the operation unit 4 inputs the number of resolutions to be converted, the switching unit 13 is provided with a resolution signal CH indicating the input magnification.

The strobe signal generators 21A, 21
B, 21C and 21D are strobe width setting registers 22A, 22B, 22C and 22D and a counter 23, respectively.
A, 23B, 23C, and 23D. The strobe width setting registers 22A, 22B, 22C, and 22D include:
A value that defines the light emission time of the LED corresponding to the size of the dot on the line LA and the interpolation lines LB, LC, and LD is stored. Counters 23A, 23B, 23C, 23
D includes a clock signal C from the clock signal generation circuit 24.
LK, and the main control unit 1 outputs the horizontal synchronizing signal H
SYNC is provided. Horizontal synchronization signal HSYNC
Is a rectangular pulse indicating the start of each line, and is a signal for synchronizing the dot size changing unit 12 and the light emission control unit 14 in the sub-scanning direction.

The strobe signal generator 21A having the above-described configuration
(Or 21B, 21C, 21D), the counter 23
A (or 23B, 23C, 23D) sets the strobe width setting register 22A (or 22B, 22C, 22D) using the horizontal synchronization signal HSYNC as a reference for counting.
To the value stored in the strobe signal SA (or SB, S).
C, SD). The horizontal synchronizing signal HSYNC is also supplied to the switching unit 13, and the switching unit 13 uses the horizontal synchronizing signal HSYNC as a reference and
The strobe signals SA, SB, SC, and SD generated by A, 21B, 21C, and 21D are switched as necessary and output to the light emission control unit 14.

Next, the operation of the dot size changing section 12 when an instruction to convert the resolution to 8 times is input by the operation section 4 will be described. FIG. 3 shows a dot size changing unit 12 when an instruction to convert the resolution to 8 times is input by the operation unit 4.
It is a time chart. In FIG. 3, the values of 4, 3, 2, and 1 are stored in the strobe width setting registers 22A, 22B, 22C, and 22D, respectively. When converting the resolution to eight times, between the adjacent lines LA1 and LA2,
7 interpolation lines LC1, LB1, LC2, L
D, LC3, LB2 and LC4 are added. In order to add an interpolation line in this way, the switching unit 13 having acquired the resolution signal CH8 changes the strobe signal generation units 21A, 21B,
21C and 21D, the strobe signals SA,
By switching between SB, SC and SD, strobe signals SA, SC, SB, SC, SD, SC, SB, S
Are given to the light emission control section 14.

When an instruction to convert the resolution to double is input by the operation unit 4, the adjacent lines LA1, LA
In order to add one interpolation line LD between the two, the switching unit 13 having acquired the resolution signal CH2 converts the strobe signals SA, SD,.
When an instruction for double conversion is input, the adjacent line LA
1 and LA2, three interpolation lines LB1,
To add LD and LB2, the switching unit 13 that has acquired the resolution signal CH4 outputs the strobe signals SA, SB, SD,
.. Are given to the light emission control unit 14.

The operation of the facsimile apparatus having the above configuration will be described below. 4 to 7 are flowcharts showing the operation of the facsimile apparatus which is an embodiment of the image forming apparatus according to the present invention, and FIG. 8 is an explanatory diagram for explaining the operation of the image forming apparatus according to the present invention. (Process for Converting Resolution to Twice) The facsimile apparatus according to the present invention provides the following when forming the acquired image data (S1).
When an instruction to double the resolution is input from the operation unit 4, the main control unit 1 sends a resolution signal CH2 indicating that the resolution is to be doubled to the switching unit 13 provided in the dot size changing unit 12. (S2), image data for one line in the main scanning direction is read from the image memory 7 and stored in the first line memory 18 of the image data generation unit 16 (S2).
11). Next, the main controller 1 gives the image data of the first line memory 18 to the light emission controller 14. At this time, the switching unit 1
3 supplies a strobe signal SA to the light emission control unit 14 (S12), and the light emission control unit 14 causes each LED corresponding to the given image data to emit light for a time specified by the strobe signal SA, thereby forming an image. Line LA by part 15
The dot on 1 is recorded on recording paper.

Next, the main controller 1 determines whether or not all the processing of the image data in the image memory 7 has been completed (S1).
3) If not completed, the next one line of image data is read from the image memory 7 and the second line memory 19 is read out.
(S14). The image data generating unit 16 obtains the logical sum of the dots adjacent to each other in the sub-scanning direction from the image data stored in the first line memory 18 and the second line memory 19 by using the logical sum circuit 17 to add the image data. The image data on the power interpolation line LD is generated and stored in the third line memory 20 (S15). Next, the main control unit 1
Transmits the image data of the third line memory 20 to the light emission control unit 1
Give to 4. At this time, the switching unit 13 outputs the strobe signal S
D is given to the light emission control unit 14 (S16), and the light emission control unit 14 causes each LED corresponding to the given image data to emit light for the time specified by the strobe signal SD, and the image forming unit 15 causes the interpolation line. The dots on the LD are recorded on recording paper.

The main control unit 1 then sends the second line memory 19
Is stored in the first line memory 18 (S1).
7) The image data of the first line memory 18 is given to the light emission control unit 14. At this time, the switching unit 13 supplies the strobe signal SA to the light emission control unit 14 (S12), and the light emission control unit 14 emits light for each LED corresponding to the given image data for the time specified by the strobe signal SA. Then, the dots on the line LA2 are recorded on the recording paper by the image forming unit 15. Next, the main controller 1 determines whether the processing of the image data in the image memory 7 has been completed (S1).
3) The above operation is repeated until the processing of all lines of the image data is completed.

Thus, for example, one interpolation line LD is added between adjacent lines LA1 and LA2 of the image as shown in FIG. 8A, and the dots on the interpolation line LD are changed to the dots on the line LA. By making it smaller, FIG.
As shown in (b), a smooth image with the resolution in the sub-scanning direction doubled is obtained.

(Process for Converting Resolution to Four Times) The facsimile apparatus according to the present invention uses the acquired image data (S1).
When an instruction to convert the resolution to four times is input from the operation unit 4 at the time of forming the image, the main control unit 1 sends the resolution indicating that the resolution is to be quadrupled to the switching unit 13 provided in the dot size changing unit 12. A signal CH4 is given (S2), and one line of image data in the main scanning direction is read from the image memory 7 and stored in the first line memory 18 of the image data generator 16 (S21). Next, the main controller 1 gives the image data of the first line memory 18 to the light emission controller 14. At this time, the switching unit 13 outputs the strobe signal SA to the light emission control unit 1
4 (S22), the light emission control unit 14 causes each LED corresponding to the given image data to emit light for the time defined by the strobe signal SA, and records dots on the line LA1 by the image forming unit 15. Record on paper.

Next, the main controller 1 determines whether or not all the processing of the image data in the image memory 7 has been completed (S2).
3) If not completed, the next one line of image data is read from the image memory 7 and the second line memory 19 is read out.
(S24). The image data generation unit 16 obtains the logical sum of each adjacent dot from the image data stored in the first line memory 18 and the second line memory 19 by using the logical sum circuit 17, thereby obtaining the interpolation line LD to be added. The image data on the third line memory 20 is generated.
(S25). Next, the main controller 1 gives the image data of the first line memory 18 to the light emission controller 14.
At this time, the switching unit 13 supplies the strobe signal SB to the light emission control unit 14 (S26), and the light emission control unit 14 emits light for each LED corresponding to the given image data for the time specified by the strobe signal SB. And the image forming unit 15
To record the dots on the interpolation line LB1 on the recording paper.

The main control unit 1 then sends the third line memory 20
Is given to the light emission control unit 14. At this time, the switching unit 13 supplies the strobe signal SD to the light emission control unit 14 (S27), and the light emission control unit 14 emits light for each LED corresponding to the given image data for the time specified by the strobe signal SD. Then, the dots on the interpolation line LD are recorded on the recording paper by the image forming unit 15. Next, the main control unit 1 gives the image data of the second line memory 19 to the light emission control unit 14. At this time, the switching unit 13 supplies the strobe signal SB to the light emission control unit 14 (S28), and the light emission control unit 14 sets the strobe signal SB for a time defined by the strobe signal SB.
Each LED corresponding to the given image data is caused to emit light,
The image forming unit 15 records dots on the interpolation line LB2 on recording paper.

The main control unit 1 then sends the second line memory 19
Is stored in the first line memory 18 (S2
9) The image data of the first line memory 18 is given to the light emission control unit 14. At this time, the switching unit 13 supplies the strobe signal SA to the light emission control unit 14 (S22), and the light emission control unit 14 emits light for each LED corresponding to the given image data for the time specified by the strobe signal SA. Then, the dots on the line LA2 are recorded on the recording paper by the image forming unit 15. Next, the main controller 1 determines whether or not the processing of the image data in the image memory 7 has been completed (S2).
3) The above operation is repeated until the processing of all lines of the image data is completed.

Thus, for example, three interpolation lines LB1, LD and LB2 are added between adjacent lines LA1 and LA2 of the image as shown in FIG.
1, LA2, the dots on the interpolation line are formed larger, specifically, the interpolation lines LD, LB1, L
By forming large dots in the order of B2 and lines LA1 and LA2, a smooth image whose resolution in the sub-scanning direction is quadrupled can be obtained as shown in FIG. 8C.

(Process of Converting Resolution to 8 Times) In the facsimile apparatus according to the present invention, the acquired image data (S1)
When an instruction to convert the resolution to 8 times is input from the operation unit 4 at the time of forming the image, the main control unit 1 sends the resolution indicating that the resolution is to be converted to 8 times to the switching unit 13 provided in the dot size changing unit 12. A signal CH8 is given (S2), and one line of image data in the main scanning direction is read from the image memory 7 and stored in the first line memory 18 of the image data generator 16 (S31). Next, the main controller 1 gives the image data of the first line memory 18 to the light emission controller 14. At this time, the switching unit 13 outputs the strobe signal SA to the light emission control unit 1
4 (S32), the light emission control unit 14 causes each LED corresponding to the given image data to emit light for the time specified by the strobe signal SA, and records dots on the line LA1 by the image forming unit 15. Record on paper.

Next, the main controller 1 determines whether or not all the processing of the image data in the image memory 7 has been completed (S3).
3) If not completed, the next one line of image data is read from the image memory 7 and the second line memory 19 is read out.
(S34). The image data generation unit 16 obtains the logical sum of each adjacent dot from the image data stored in the first line memory 18 and the second line memory 19 by using the logical sum circuit 17, thereby obtaining the interpolation line LD to be added. The image data on the third line memory 20 is generated.
(S35).

The main control unit 1 then sends the first line memory 18
Is given to the light emission control unit 14. At this time, the switching unit 13 supplies the strobe signal SC to the light emission control unit 14 (S36), and the light emission control unit 14 causes each LED corresponding to the given image data to emit light for the time specified by the strobe signal SC. Then, the dots on the interpolation line LC1 are recorded on the recording paper by the image forming unit 15. Next, the main controller 1 gives the image data of the first line memory 18 to the light emission controller 14. At this time, the switching unit 13 supplies the strobe signal SB to the light emission control unit 14 (S37), and the light emission control unit 14 sets the strobe signal SB for a time defined by the strobe signal SB.
Each LED corresponding to the given image data is caused to emit light,
The image forming unit 15 records dots on the interpolation line LB1 on recording paper. Further, the main controller 1 gives the image data of the first line memory 18 to the light emission controller 14. At this time, the switching unit 13 supplies the strobe signal SC to the light emission control unit 14 (S38), and the light emission control unit 14 emits light for each LED corresponding to the given image data for the time specified by the strobe signal SC. Then, the dots on the interpolation line LC2 are recorded on the recording paper by the image forming unit 15.

The main control unit 1 then sends the third line memory 20
Is given to the light emission control unit 14. At this time, the switching unit 13 supplies the strobe signal SD to the light emission control unit 14 (S39), and the light emission control unit 14 emits light for each LED corresponding to the given image data for the time specified by the strobe signal SD. Then, the dots on the interpolation line LD are recorded on the recording paper by the image forming unit 15. Next, the main control unit 1 gives the image data of the second line memory 19 to the light emission control unit 14. At this time, the switching unit 13 supplies the strobe signal SC to the light emission control unit 14 (S40), and the light emission control unit 14 sets the strobe signal SC for the time specified by the strobe signal SC.
Each LED corresponding to the given image data is caused to emit light,
The image forming unit 15 records dots on the interpolation line LC3 on recording paper.

Further, the main control unit 1 controls the second line memory 1
9 is provided to the light emission control unit 14. At this time, the switching unit 13 supplies the strobe signal SB to the light emission control unit 14 (S41), and the light emission control unit 14 emits light for each LED corresponding to the given image data for the time defined by the strobe signal SB. Then, the dots on the interpolation line LB2 are recorded on the recording paper by the image forming unit 15. Next, the main control unit 1 gives the image data of the second line memory 19 to the light emission control unit 14. At this time, the switching unit 13 supplies the strobe signal SC to the light emission control unit 14 (S42), and the light emission control unit 14 emits light for each LED corresponding to the given image data for the time specified by the strobe signal SC. Then, the dots on the interpolation line LC4 are recorded on the recording paper by the image forming unit 15.

The main control unit 1 then sends the second line memory 19
Is stored in the first line memory 18 (S4).
3) The image data of the first line memory 18 is given to the light emission control unit 14. At this time, the switching unit 13 supplies the strobe signal SA to the light emission control unit 14 (S32), and the light emission control unit 14 emits light for each LED corresponding to the given image data for the time specified by the strobe signal SA. Then, the dots on the line LA2 are recorded on the recording paper by the image forming unit 15. Next, the main controller 1 determines whether or not the processing of the image data in the image memory 7 has been completed (S3).
3) The above operation is repeated until the processing of all lines of the image data is completed.

Thus, for example, seven interpolated lines LC1, LB1, LC2, LD, LC3, LB2 between adjacent lines LA1, LA2 of the image as shown in FIG.
LC4 is added, and the interpolation line LD, the interpolation line LC2,
LC3, interpolation lines LB1, LB2, lines LA1, L
By forming large dots in the order of A2, FIG.
As shown in (d), a smooth image whose resolution in the sub-scanning direction has been converted to 8 times can be obtained.

In the above-described embodiment, it is assumed that the strobe width setting register previously stores the value indicating the light emission time of the LED corresponding to the size of the dot on each line. May be changed according to the conditions. The image data generated by the image data generation unit is used only for dots on the interpolation line LD. However, any method that can obtain a natural image applied to image data obtained from the outside can be used in the above method. Not exclusively.

[0036]

According to the first aspect of the present invention, the resolution of an image is converted to four times or eight times by adding a plurality of interpolation lines between adjacent lines of image data obtained from the outside, and the dots are converted. When the size changing unit forms a dot on the interpolation line larger as the interpolation line is closer to the line of the image data acquired from the outside, it is possible to realize an image forming apparatus that forms a smooth image. In particular, a straight line intersecting at a large angle with respect to the main scanning direction can be formed more smoothly.

In the case of the second invention, the apparent resolution of the image is converted by generating image data corresponding to the dots on the interpolation line based on the image data of two adjacent lines, and obtained from outside. An image forming apparatus that forms a natural image suitable for image data can be realized.

According to the third aspect, an image is formed by the LED array.
The dot corresponding to the ED is formed large, and when the light emission time of the LED is short, the dot corresponding to the LED is formed small. Therefore, the light emission time of the LED corresponding to the image data of the plurality of interpolation lines between adjacent lines of the image data obtained from the outside changes for each line, and the interpolation line closer to the line of the image data obtained from the outside, When the dots are formed to be large by extending the emission time of the corresponding LED, an image forming apparatus that forms a smooth image can be realized.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a main configuration of a facsimile apparatus according to the present invention.

FIG. 2 is a block diagram illustrating a main configuration of a dot size changing unit.

FIG. 3 is a time chart in the dot size changing unit when an instruction to convert the resolution to 8 times is input from the operation unit.

FIG. 4 is a flowchart showing an operation of the facsimile apparatus which is an embodiment of the image forming apparatus according to the present invention.

FIG. 5 is a flowchart showing an operation of the facsimile apparatus which is an embodiment of the image forming apparatus according to the present invention.

FIG. 6 is a flowchart showing an operation of the facsimile apparatus which is an embodiment of the image forming apparatus according to the present invention.

FIG. 7 is a flowchart showing an operation of the facsimile apparatus which is an embodiment of the image forming apparatus according to the present invention.

FIG. 8 is an explanatory diagram for explaining the operation of the image forming apparatus according to the present invention.

FIG. 9 is an explanatory diagram for explaining an operation of the image forming apparatus.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Main control part 10 Bus 12 Dot size change part 13 Switching part 14 Light emission control part 15 Image formation part 16 Image data generation part 21A, 21B, 21C, 21D Strobe signal generation part

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) H04N 1/23 103 F term (Reference) 2C162 AE28 AE47 AF13 AF57 AF71 FA04 FA17 5C051 AA02 CA08 DA03 DB02 DB18 DB29 DE07 DE30 FA01 5C074 AA02 BB04 DD04 DD05 DD07 DD11 DD14 FF01 HH02 5C076 AA21 AA32 BA02 BB03 BB14 BB42

Claims (3)

[Claims] 1. An image forming apparatus for converting resolution by adding an interpolation line between adjacent lines of acquired image data, wherein an image corresponding to a dot on the interpolation line is added to add a plurality of interpolation lines. An image forming apparatus comprising: an image data generating unit that generates data; and a dot size changing unit that changes a dot size for each line. 2. The image data generating unit according to claim 1, wherein the image data generating unit is configured to generate image data corresponding to a dot on an interpolation line based on image data of two adjacent lines. Image forming apparatus. 3. An LED for each of the acquired image data and the image data generated by the image data generation unit.
The dot size changing unit changes the light emission time of the LED corresponding to the image data of the plurality of interpolation lines between adjacent lines of the acquired image data for each line. The image forming apparatus according to claim 1, wherein the image forming apparatus is configured to perform the processing.