JPH02304683A - Image processor - Google Patents

Abstract

PURPOSE:To attain proper plotting by approximately correcting the calculated angle of a circular arc. CONSTITUTION:When an angle on the circumference of a linear pattern is calculated, dot data on a circumference necessary for plotting in an image memory 8 are calculated from the angle and the bit information of a linear pattern obtained from a linear pattern storing part 4. The position of dot data setting up a bit to '1' is calculated in the image memory 8. The outline of a circle based upon the linear pattern is plotted in the image memory 8 based upon the data. The bit data developed to bits in the image memory 8 are trans ferred to a printer 20 through a printer interface 9 and the linear diagram of the circle is printed out by the printer.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an image processing device, and for example, to an image processing device that draws the outline of a diagram based on a line pattern.

[Prior Art J] Conventionally, in this type of device, for example, 1. When drawing the outline of a circle (diagram) on an image memory based on a line pattern, the drawing of the -circumference may end in the middle of drawing the line pattern. As an example, FIG. 5A shows a chain double-dashed circle. In this circle, the arc force with angle θ! The area corresponds to one line pattern, and the arc having an angle Δθ is a part of the line pattern. in this way,
Conventionally, the outline of a circle may be composed of a line pattern and a part of the line pattern.

Furthermore, conventionally, when drawing a line diagram on an image memory based on a line pattern, the lines were thickened (then only the line pattern was enlarged in the vertical direction according to the thickness of the line. 10
The figure shows an example of this, and is a two-dot chain line when the line width is 20 dots and the horizontal expansion rate is "1".

[Problem to be solved by the invention] However, in the above conventional example, first, in the former case,
Based on the length of one line pattern and the radius of the circle (correction was not performed), so there were the following drawbacks.

That is, if the contour line for drawing a circle is thick (the line pattern ends in the middle of drawing one line pattern), the discontinuity of the line pattern becomes noticeable and it is difficult to obtain an appropriate drawing result.

Furthermore, in the latter case, the line pattern was only enlarged in the vertical direction, resulting in the following drawbacks.

That is, even if the line is made thicker, the line is not expanded in the horizontal direction, so that an appropriate drawing result corresponding to the line thickness cannot be obtained. In such a case, it is not possible to obtain a good printing result corresponding to the drawing result.

The present invention has been made in view of the above-mentioned drawbacks, and its purpose is to increase the size of the circle and the length of the radius of the circle.
An object of the present invention is to provide an image processing device that correctly corrects the angle of an arc per line pattern according to the angle of the arc per line pattern.

Another object of the present invention is to provide an image processing device that can draw appropriate line diagrams even when the lines are thick.

[Means for Solving the Problems] In order to solve the above-mentioned problems and achieve the objects, an image processing device according to the present invention creates a line pattern in which at least one group of black dots and a group of white dots coexist. an input means for inputting line pattern information including correction information for the line pattern; and calculating an arc angle for each line pattern based on the line pattern. and a correction means for approximately correcting the angle of the circular arc calculated by the calculation means.

Further, in an image processing apparatus that includes a process of drawing a line diagram using a line pattern in which at least one or more black dot groups and white dot groups are mixed, line pattern information including scaling information of the line pattern is input. an input means for inputting a line pattern, a scaling means for scaling the number of dots in a group of black dots and a group of white dots constituting the line pattern based on the line pattern information inputted by the input means; and drawing means for drawing a line pattern by multiplying the number of black dots and the number of white dots.

[Operation] According to this configuration, the human power means inputs line pattern information including line pattern correction information, and the calculation means calculates the angle of the circular arc for each line pattern based on the line pattern. The angle of the circular arc calculated by the calculating means is approximated and corrected.

Further, the input means inputs line pattern information including scaling information of the line pattern, and the scaling means inputs each of the black dot group and the white dot group constituting the line pattern based on the line pattern information inputted by the input means. The number of dots is scaled, and the drawing means draws a line pattern based on the number of black dots and the number of white dots scaled by the scale.

[Embodiments] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

<First example> First, a first example will be described.

In this first embodiment, an image processing apparatus that draws a diagram on a memory based on line pattern information sent from a host computer and outputs it to an external device will be described as an example.

FIG. 1 is a block diagram showing the configuration of a first embodiment according to the present invention. In the figure, reference numeral 1 indicates an image processing apparatus of the first embodiment. This image processing device 1 is connected to a printer 20 as an external device.

Reference numeral 2 denotes a CPU that controls the operation of the entire apparatus l according to various programs in the ROMB. The present invention is characterized by a control method when the CPU 2 draws a diagram of a circle, so the description will focus on the process of drawing a circle. 3 indicates a ROM that stores a control program, an error processing program, a program for operating the CPLI 2 according to the flowchart shown in FIG. 4, and the like. This R.O.
In Ma, 4 indicates a line pattern storage section in which bit information for forming various line patterns is stored, which will be described later, and 5 indicates a common divisor table containing the common divisors of 360°, which will be described later. 6 indicates a RAM used as a work area for the various programs mentioned above and a temporary save area during error processing.

Reference numeral 7 indicates an input unit for inputting line pattern information (radius of a circle, type of line, etc.) from a host computer (not shown), and the line pattern information input by this input unit 7 is stored in the RAMe. . Reference numeral 8 indicates an image memory for developing line drawing information, that is, image data into bit patterns. Reference numeral 9 indicates a printer interface that receives image data developed on the image memory 8 and transfers it to the printer 20, and IO indicates a path line that transmits address signals, data, and control signals within the apparatus 1.

Here, line pattern information will be explained.

FIG. 2 is a diagram showing an example of the line pattern of the first embodiment. The line pattern in the figure is a two-dot chain bit pattern with a length of 32 bits, and "O" in the figure indicates a white bit state with no bit set, and "l" indicates a black bit state with a bit set. are shown respectively. In this way, the line pattern (bit information with a length of 32 bits) is stored in the line pattern storage section 4.
is stored in

Also, when drawing the outline of a circle based on the above line pattern, it is necessary to calculate how many arcs on the circumference the circle corresponds to when forming the outline of the circle with that line pattern. (
The circumference is 360 degrees).

Therefore, the angle of the arc per line pattern (hereinafter referred to as "
The calculation formula for calculating θ'' is shown below. In the above calculation formula, r360J is the angle of the 360 degree circumference, "π" is the pi ratio, "radius of the circle" is the radius of the circle to be drawn (in dots), and "number of bits of the r-line pattern" is the line Each shows a value corresponding to the number of bits of the pattern, 32 (according to FIG. 2).

Next, the common divisor table 5 of "360" in the ROMB mentioned above will be explained.

FIG. 3 is a diagram illustrating the contents of the common divisor table 5 of the first embodiment. As shown in FIG. 3, the common divisor table 5 is a table in which pointer numbers (n=1 to 24) are serially attached to all 24 common divisors, and the value of each common divisor is indicated by Vn. It will be done.

For example, when the pointer of the common divisor table 5 points to number 12, V+*=18, and the angle of the arc of the line pattern at that time is 18 degrees.

Next, the operation of the first embodiment will be explained.

FIG. 4 is a flowchart illustrating the process from drawing the outline of a circle using the line pattern according to the first embodiment to printing the line diagram of the circle.

First, when line pattern information is sent from a host computer (not shown), a line pattern is selected based on the type of line pattern included in the line pattern information and data indicating a diagram of a circle (radius of a circle, etc.). The long line pattern is R
The data is stored in AM6 (step S1). At this time, data such as the radius of the circle, etc. are also stored in RAMe (not shown).

Then, from RAM6, the total number of bits (length) of the line pattern
is read out and substituted into the equation for determining the arc angle for each line pattern described above, and calculation is performed (step S2).

In this way, when the angle θ (unit: degree) on the circumference per line pattern is calculated based on the above calculation formula, the first number (n= 1)
A pointer is set to (step S3). Then, the content pointed by the pointer, that is, the value ■, is compared with the already determined angle θ (step S4). the result,
If the angle θ is larger than the value Vl, the pointer is advanced by one (step S5), and the value v2 and the angle θ are compared again in step S4. in this way,
Value■. If the angle θ is larger than
It is possible to advance to the number V24, but the value at that time is V24.
When the angle θ is larger than the value V24, a message is sent to the host computer as an error (not shown).

Further, if it is determined in step S4 that the value V is equal to the angle θ, the angle θ becomes a common divisor of 360, and even if the outline of the circle is formed with the line pattern of the angle θ, the line pattern may be missing. image memory 8 without causing odd angles.
Since a circle diagram can be drawn above, the process proceeds to the next step S9 with θ=v1. This determination is valid not only when θ''V t, but also when the value ■ changes according to the pointer number n.

Further, in step S4, the value ■. If it is determined that is larger than the angle θ, a comparison is performed between the value obtained by subtracting the value V n-1 pointed by one previous pointer from the angle θ and the value obtained by subtracting the angle θ from the value pointed by the pointer vn. (Step S6). This comparison is a process of checking which of the two common divisors the angle θ of the calculation result is closer to, and the closer common divisor becomes the value of the angle θ. As a result of the comparison process in step S6, if the difference between the angle θ and the lower value V n −+ of the pointer is greater than and equal to the difference between the angle θ and the higher value vn of the pointer, the angle θ is the higher value of the pointer. value V
Approximate correction is made to n (step S7).

Furthermore, if the difference between the angle θ and the higher value vn of the pointer is greater than the difference between the angle θ and the lower value V n −r of the pointer, the lower value V 11− of the pointer 1 is approximated as the angle θ (step S8). Note that in order for this process to proceed to the process of step S6, the pointer of the common divisor table 5 is n≧2.

Once the angle θ is determined as described above, the point data on the circumference (0 degree to 360 degrees) is calculated (step S9
). In this process, the number of bits of a line pattern represented by 32 bits is thinned out or expanded based on the angle for drawing one line pattern. Then, the position of the point data that sets the bit to "1" (black) on the image memory 7 is calculated (step 5IO), and the outline of a circle is drawn (developed) using a line pattern on the image memory 7 based on the data. ) is performed (step 5ll).

Furthermore, the bit data on the image memory 7 that has been expanded into bits is transferred to the printer 20 via the printer interface 9.
and a circle diagram is printed by the printer 20 (step 512).

An example of the outline of a circle printed by the above algorithm will be described below.

FIG. 5B is a diagram showing an example of the result of printing a circle according to the first embodiment. The printing result shown in FIG. 5B shows the outline of a circle with a radius of 22 dots and a line width of 3 dots. If the calculation is performed using the above formula under the condition of a radius of 22 dots, the angle θ per line pattern will be 83 degrees. Actually, the calculation result includes values below the decimal point, but the angle θ is, for example, rounded off or truncated.

Or the value will be rounded up. The angle θ (83 degrees) is “
Since it is not a common divisor of 360°, if drawing is performed based on this value, drawing will end when one of the line patterns breaks off, as in the outline of the circle in Figure 5A explained in the conventional example. It turns out. Therefore, the circle drawing method described in the flowchart of FIG. 4 is required. First, if the angle θ of the calculation result is 83 degrees, the pointer of the common divisor table 5 is advanced to number 21 (n=21). Value at that time■2. is "90", and when the pointer is at the previous number 20 (n=20), the value v2° is "72". Therefore, the value of the angle θ between each pointer and the calculation result is “83
As a result, the difference between the angle θ and the value V□ is “7”, and the difference between the angle θ and the value V2° is “11”. Therefore, the angle θ is the pointer 21 Since the number V21 is closer, the angle θ, that is, the angle θ of one line pattern, is corrected to 90 degrees.In this way, the outline of the circle is equal to four line patterns, and one line pattern is also without interruption,
As shown in FIG. 5B, a circular outline that does not include the missing line pattern is drawn. Of course, the outline line forming the circle may be a chain line or the like.

As explained above, according to the first embodiment, the line pattern 1
Approximately correcting the striking angle prevents the line pattern from being drawn with interruptions, so it is possible to obtain an appropriate drawing result depending on the size of the circle.

Now, in the first embodiment described above, the output light is the printer device, but it is also possible to use the display device as the output light.

Furthermore, in the first embodiment described above, the bit pattern information of the line pattern is retrieved from the ROMU of this device and drawing is performed based on it, but the bit pattern information of the line pattern is It is also possible to input pattern information, store it in RAM, and perform drawing based on the bit pattern information.

Furthermore, in the first embodiment described above, the explanation was given using a line pattern with a length of 32 bits as an example, but it can be similarly applied to cases where other line patterns having a length less than the length of the circumference are used. It is. In the first embodiment described above, the angle per line pattern is an integer, but the present invention is not limited to this, and it is also possible to improve the accuracy of drawing by determining the angle down to the decimal point. . In that case, the third
It is sufficient to extend the common divisor table 5 shown in the figure to the range of decimal points.

Further, in the first embodiment, it is not stated whether printing is performed in a single color or in multiple colors, but it may be printed in either color without departing from the spirit of the present invention. In the case of multiple colors, the number of image memories may be increased according to the types of colors.

<Second example> Next, a second example will be described.

Since the second embodiment has the same configuration as the first embodiment described above, a description of the configuration will be omitted and only the different points will be explained.

First, in the line pattern shown in FIG. 2 described in the first embodiment, in this second embodiment, the 0th bit is taken as the first bit of the line pattern, and as will be described later, when counting bit positions, the 31st bit starts from the 0th bit. When it is counted up to the 0th bit, it returns to the position of the 0th bit.

Further, in the second embodiment, the horizontal magnification ratio (enlargement ratio) of the line pattern can be set by instructions from the host computer. This instruction information is included in the line pattern information.

FIG. 6 is a diagram illustrating a method of enlarging a line pattern in the horizontal direction according to the second embodiment. To explain an example of magnification with reference to Fig. 6, the line pattern in the figure represented by 2 bits will have the first and second bits each 5 times larger when the horizontal magnification rate is 5°. It will be converted into a line pattern enlarged to .

Furthermore, a method of specifying a line pattern will be explained.

FIG. 7 is a diagram illustrating a method of specifying a line pattern in the second embodiment. The line pattern is specified by specifying the starting point A and ending point B of a straight line when drawing a straight line in the two-dimensional X13' coordinate system, as shown in FIG.

Therefore, the operation of the second embodiment will be explained in more detail.

FIGS. 8A and 8B are flowcharts illustrating a method for drawing and printing a line diagram using a line pattern according to the second embodiment. For the sake of explanation, an example will be given. The line width is set to 20 dots.

First, when line pattern information is sent from the host computer (step 520), starting point A and ending point 8 are
The distance AB between them is calculated (step S21), and when the type of line pattern is determined from the line pattern information (step 522), the line pattern storage unit 4 stores the bit information of the line pattern of the determined type. A pointer is set to the first bit (step 523).

At this time, the bit position of the pointer is m (0≦m≦31)
Since the state of the bit at that bit position is indicated by P, the bit position of the pointer is set to m=0 in step S23.

Next, the variables C1 and Cm at the beginning positions where the black dot and white dot point data are expanded, respectively, and the counter β, which indicates the number of bits from the starting point where the point data are expanded, are set to "0" (initialized). Step 524), furthermore, a horizontal expansion rate (also referred to as a proportionality constant) a of the line pattern is set based on the input line pattern information (step 525), and this expansion rate α is sent from the host computer. It may be included in the line pattern information, or the line width of the line pattern may be included in the line pattern information and received from the host computer, and the enlargement rate may be determined based on the line width.

Then, the bit state P1 of the bit position pointed to by the pointer is determined (step 826). First, the bit state P of the first bit. is "1", so the value of the counter β and the bit position m of the pointer are each incremented by one (
Step 527), the next bit state, P, is examined (
step 828). As a result, the bit state P1 is also “l”
From then on, step S27. The process of step 328 is repeated, and the bit state up to the 16th bit (m=15) is determined to be "1", and the next 17th bit (m=1
6), the bit state is determined to be "0". Here, m indicating the bit position of the pointer is the last bit of the line pattern (
When the bit advances by one from m=31), it points to the first bit of the pattern (m=o), and the counter β is directly added so that m=32. Here, the 16 bits from bit states P0 to Pts of the line pattern described above indicate the first black bit group. Similarly, the range in which the same white bit or black bit state continues until the bit state changes is defined as a white bit group or a black bit group.

In step S28, if the bit state P1g at the bit position pointed to by the pointer is determined to be "0", the count β
The value (β=16) is the starting position C2 of the white dot point data.
(step 529), and the value of the start position C2 (
C*=16) is multiplied by the expansion rate α (α=5) of the line pattern to obtain the new value of C2 (C,=80) (Step 5
30). In this way, the leading position C2 of the white dot point data developed on the image memory 8 is the 80th bit from the starting point.

After this enlargement process, the value of C2 (C,=80) and the distance AB
(AB=160) (step S31)
, As a result, the value of C2 (C,=80) becomes the value of distance AB (A
B=160), so CI.

The position of point data for developing a straight line drawing on the image memory 7 is calculated based on each item of C2 (step 53).
2). At this time, the value of C1 is "0", that is, the starting point of point data development and the starting point of point data of black dots, and the value of C1 is "80", that is, the start point of point data development of white dots. It becomes a point. In this way, based on the calculation result in step S32, the point data of the black dot is actually set at a predetermined position on the image memory 7 as the starting point (the "0" bit).
The value of the counter β and the bit position of the pointer are each incremented by one (step 534). At this point, the value of the counter β is “16”, and the bit position of the pointer is incremented by one (step 534). The bit position m is “16”. The processing in step S34 is as follows:
This process is repeated until the bit state P becomes "1" (step 535). After that, the bit state P is “l”
Then (m=β=20), the value of counter β (β=20
) is set to the first position C1 for developing the black dot (step 836), and furthermore, the CI(7) value (C,=
20) is multiplied by the magnification factor α(5), and the result is (100)−
is set as the new CI value (step 537).
.

Then, the value of cl (C,=20
) and the value of distance AB (AB=160) are compared (step 838). At this point, since the value of CI is smaller than the value of distance AB, the process returns to step S27 and the above-mentioned process is repeated (steps S27 to 53).
0). Then, the starting position C2 for developing the point data of the white dot is obtained, and the value of 02 at that time becomes "11O", and in step S31, it is determined that the point data has not been developed completely to the end point B. , the process is in step S
The process proceeds to step 32, where the point data of the black dot is developed on the image memory 7 as described above.

Processing is performed in the same manner from the “110th” bit onwards, and “i”
Point data with white dots up to the 29th bit, “130”
The point data from the 139th bit to the 139th bit is black dot, and the data from the 140th bit to 159° is black.
The data up to the second bit are developed on the image memory 7 as white dot point data.

Then, when the developed position of the point data is the °°160°° bit-th bit, that is, when the starting position C1 of the black dot point data, it is determined that C,=AB (=160) in step S38, and the image memory 7 The point data developed above is transferred to the printer 20 through the printer interface 9,
A straight line is printed by the printer 20 (step S4
1). At this time, the value of the counter β becomes "32" and the value of the bit position m of the pointer becomes "0".

Further, the processing from step S34 to step S38 is processing for finding the starting position C1 for developing the black dot point data, and when this processing determines that the value of the bit state P0 is "0" in step S26, the processing starts from step S34. Further, if it is determined in step S31 that the value of C2 is greater than or equal to the value of distance AB, the position of the point data of the black dot on the image memory 7 is calculated based on the values of C, AB (step 539). ), point data is actually expanded based on the calculation result of step S39 (step 540). Then, the expanded point data on the image memory 7 is transferred into the printer through the printer interface 9, and straight line printing is performed by the printer 20 (step 541).

By using the algorithm described above, it is possible to draw a straight line (a straight line diagram is taken as an example in the second embodiment) by enlarging it in the horizontal direction without changing the basic shape.

Here, the printing results of the process based on the above-described flowchart will be explained.

FIG. 9 is a diagram illustrating the printing results of the second embodiment.

The upper part of Fig. 9 shows the drawing results when the basic line width is 1 dot and the magnification rate is 1, and the lower part shows the drawing results when the line width is 20 dots and the magnification rate is 5, processed using the flowchart described above. The drawing results are shown.

According to the drawing results of the second embodiment shown in FIG. 9, when the line pattern is the same but the line widths are different, such as an enlargement rate of 1 and an enlargement rate of 5, the enlargement rate can be changed according to the line width. Visually good drawing results can be obtained. On the contrary,
In the conventional example shown in FIG. 1O, there is no meaning as a line pattern that is supposed to represent a chain double-dashed line (in this case, it is easy to be confused with a pattern, for example).

In the second embodiment described above, if line pattern information including the line width of the line pattern is received from the host computer, the enlargement ratio corresponding to the line width can be stored as a table in the ROM of this device. Alternatively, if the line pattern information including the enlargement rate of the line pattern is received from the host computer, the line width corresponding to the enlargement rate may be stored in the ROM of the apparatus as a table. Various modifications can be made without departing from the spirit of the invention.

As described above, according to the second embodiment, it is possible to obtain an appropriate drawing result according to the thickness of the line pattern without impairing the function as a line pattern. Also, if you have a basic line pattern, you can obtain a line pattern of the desired size by adjusting the horizontal magnification according to the thickness of the line. This prevents the increase in memory required for this purpose, and the cost is also low.

Of course, in this second embodiment, as a line pattern,
It goes without saying that dashed lines, dashed-dotted lines, etc. are also included.

In the second embodiment described above, the printer device is used as the output light, but it is also possible to use the display device as the output light.

Further, in the second embodiment described above, the bit pattern information of the line pattern is retrieved from the ROMU of this device and drawing is performed based on it, but the bit pattern information of the line pattern is It is also possible to input pattern information, store it in RAM, and perform drawing based on the bit pattern information.

Furthermore, in the second embodiment described above, a double-dashed chain line pattern with a length of 32 bits was used as an example, but the present invention is not limited to this (and may be modified without departing from the spirit of the present invention). For example, it is possible to target a line pattern that is stored as a line pattern and has an arbitrary length and an arbitrary pattern shape.Therefore, the present invention also includes a case where a reduction ratio is used instead of an enlargement ratio. It will be.

Furthermore, in the second embodiment described above, straight line drawing on a plane in the X+5' coordinate system was taken as an example, but the present invention is not limited to this, and relates to general line drawing techniques in two-dimensional space. Similar methods can be applied.

[Effects of the Invention] As explained above, according to the present invention, first, by correcting the angle per line pattern, the line pattern is not drawn with interruptions, so Appropriate drawing results can be obtained.

Further, since the line pattern can be expanded in the horizontal direction according to the thickness of the lines, it is possible to obtain an appropriate drawing result of the line diagram according to the thickness of the lines.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the configuration of the first embodiment according to the present invention, FIG. 2 is a diagram showing an example of the line pattern of the first embodiment, and FIG. 3 is a diagram showing the common divisor table 5 of the first embodiment. Figure 4 is a flowchart explaining the process from drawing the outline of a circle using the line pattern according to the first embodiment to printing the circle shape. The figure which shows an example of a printing result. FIG. 5B is a diagram showing an example of the printing result of a circle according to the first embodiment, FIG. 6 is a diagram illustrating a method for enlarging the line pattern in the horizontal direction according to the second embodiment, and FIG. 7 is a diagram showing the second embodiment. Figures 8A and 8B are flowcharts explaining the method of drawing and printing a line diagram using the line pattern of the second embodiment. Figure 9 is the printing result of the second embodiment. FIG. 10 is a diagram illustrating a printing result of a conventional example. In the figure, l...image processing device, 2...CPU, 3...
・ROM, 4... Line pattern storage section, 5... Common divisor tape, 6... RAM, 7... Input section, 8...
・Image memory, 9...Printer interface,'
10...pass line, 20...printer. Figure 3.
11

Claims (5)

[Claims] (1) In an image processing device that includes a process of drawing a circle using a line pattern in which at least one black dot group and a white dot group are mixed, line pattern information including correction information for the line pattern is input. It is characterized by comprising an input means, a calculation means for calculating an arc angle for each line pattern based on the line pattern, and a correction means for approximating and correcting the arc angle calculated by the calculation means. image processing device. (2) The image processing apparatus according to claim 1, wherein the correction means performs approximate correction to a common divisor of 360. (3) The image processing apparatus according to claim 1, wherein the line pattern information includes information for selecting a line pattern stored in advance. (4) In an image processing device that includes a process of drawing a line diagram using a line pattern in which at least one black dot group and a white dot group are mixed, line pattern information including scaling information of the line pattern is used. an input means for inputting information; a scaling means for scaling the number of dots in each of a black dot group and a white dot group forming the line pattern based on the line pattern information input by the input means; An image processing apparatus comprising: a drawing means for drawing a line pattern using a scaled number of black dots and a number of white dots. (5) The image processing apparatus according to claim 4, wherein the line pattern information includes information for selecting a line pattern stored in advance.