KR900004950B1 - Character interpolation control method - Google Patents

Abstract

An interpolated dot pattern output control system comprises means (31-49) for generating x and y interpolation addresses of a dot to be interpolated along the main scanning and subscanning directions, a means (58) for generating interpolated dots in accordance with dot interpolation addresses, a shift register (60) having a bit length corresponding to the write width of the image memory in which the dot interpolated character pattern is expanded, and an offset generating means (29) for generating an offset value within the bit range corresponding to the write width of the image memory before the interpolated dots along the main scanning direction are stored in the shift register and for writing the dots in the shift register.

Description

Character interpolation control method

1A to 1C are diagrams for explaining conventional dot interpolation processing means, respectively.

2 is a block diagram showing the structure of main parts in one embodiment of the present invention;

3 to 11 are for explaining the operation of the above embodiment, respectively,

3A to 3F show the relationship between the dot information (dot pattern) of one grid and four points surrounding each new dot generated by the dot interpolation process, the level classification of the interpolation value set in the interpolation table ROM, and the table form. Figure.

4 is a diagram for explaining a selection switching operation in the form of a table.

5A to 5D show examples of pattern conversion, respectively.

6A and 6B are diagrams showing the main and sub scanning directions when the CRT display is displayed and the main and sub scanning directions when printing out.

7 is a diagram showing a relationship between various setting data.

8 is a diagram showing a relationship between a character pattern-converted by dot interpolation processing and a rectangle circumscribed to the character.

FIG. 9 is a diagram showing an example of setting character pitches and line pitches for various modified characters. FIG.

FIG. 10 is a diagram showing an example of development of an underline for various deformed characters. FIG.

11 is a view for explaining zoning means.

* Explanation of symbols for main parts of the drawings

10: CPU 11: Main Memory (MM)

12: CPU bus 13: Display control circuit (CRT-C)

14 Frame memory (FM) 15 Serial-to-parallel conversion circuit (P-S)

16: CRT display unit 17: print control unit

18: line buffer 19: serial dot printer

21,22,25,26,27,28,31,32,33,34,35,36,42,44,46,48,50,54,56: register

23: underline / radiation control unit 24: triangular function table

29: offset data generation unit

37,38,39,40: Addition circuit (ADD-A, ADD-B, ADD-C, ADD-D)

41, 43, 45, 47: data selector 49: selection control circuit (SC)

51: Kanji pattern memory (KPM) 52: 1 character buffer

53: bit select circuit 55: discrimination control circuit

57: dot discrimination circuit 58: interpolation table ROM

59: comparator 60: shift register

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dot interpolation control method for use in a document producing apparatus, a character output apparatus, and the like which handle character font information of a dot matrix structure.

In a device that handles a character font having a prescribed dot matrix configuration, such as a document generating apparatus, when the character font having a prescribed dot matrix configuration is provided with a function capable of enlarging / reducing at a specific magnification, conventionally, FIGS. original character pattern dot SD as shown in (c). In the so-called simple enlargement reduction method, which simply increases or deletes dots, has been taken.

Such conventional enlargement or reduction means can be realized relatively simply and inexpensively. However, for example, the pattern of the output pattern is identified to be out of the original form of the character to be expressed, such as a stepped portion in the diagonal line becomes prominent. There was a flaw in the unnatural character expression that was difficult to do.

In addition, in the conventional dot interpolation means as described above, it is not easy to obtain this when a deformed character obtained by inclining or rotating the original pattern or the character pattern having an arbitrary magnification / reduction ratio at an arbitrary angle, and Even if the deformation range is greatly restricted, there is a defect in the converted character pattern, and the accuracy of the conversion is greatly reduced, so that a pattern conversion with high fidelity cannot be performed.

In addition, for the deformed characters such as the rotational characters and the oblique characters, the occupied text width in the main / scanning direction is changed in various ways by the angle or the magnification applied to the deformed characters. It was difficult to keep the pitch and hang pitch appropriately at all times.

The present invention has been studied in consideration of the above circumstances, and the dot interpolation of a character pattern having a predetermined dot matrix structure represented by X and Y coordinates at least in the main, scanning direction, or main / scanning direction is given to the dot interpolation. In the pattern conversion mechanism for obtaining a pattern of transformed letters that are rotated or inclined, it is possible to arrange and control each character at appropriate intervals with respect to the modified letter after dot interpolation having an arbitrary inclination angle specified by a relatively simple configuration. It is an object to provide a control method.

According to the present invention, a pattern is obtained by interpolating a character pattern having a predetermined dot matrix configuration represented by X and Y coordinates at any given angle in at least the main, scanning direction, or sub-scanning direction, and interpolating the dot pattern to obtain rotation and deformed character patterns. The converter tool is configured to calculate a rectangular area circumscribed on the X and Y lines with respect to the character frame of the character patterned at the designated angle, and to control the character spacing in units of the rectangular area. The character spacing can always be suited for deformed characters, and a character interpolation control method of a character output device having a high degree of character arrangement function for rotating characters and oblique body characters can be realized.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

2 is a circuit block diagram showing an embodiment of the present invention. In the figure, reference numeral 10 denotes a CPU which controls the entire system, reference numeral 11 denotes a main memory (MM), and reference numeral 12 denotes a CPU bus. Reference numeral 13 denotes a display control circuit (CRT = C), reference numeral 14 denotes a frame memory FM, reference numeral 15 denotes a serial / parallel conversion circuit, reference numeral 16 denotes a CRT display, and reference numeral Reference numeral 17 denotes a printing control unit, reference numeral 18 denotes a line buffer, and reference numeral 19 denotes a serial dot printer. Reference numeral 21 denotes a register indicating a size (V size) corresponding to the width in the main / scan direction after the change in the pattern change (scan / scan interval x times), and the reference numeral 22 denotes the same note. This register indicates the size (H size) corresponding to the width in the scanning direction. Reference numeral 23 denotes an underline / radiation control unit which has a length in accordance with the contents of the register 21 and generates an underline and a ray dot pattern and writes it to the line buffer 18. Reference numeral 24 is a trigonometric function table for storing angular information (triangle function data) corresponding to a designated angle at the time of oblique rotation of a character or the like. Reference numeral 25 is an area designation register for dividing the area of the character pattern after the conversion process exceeding the reference character height in units of the reference character height at the time of pattern change. Reference numerals 26 and 27 denote registers for storing dot notation widths (dx, dy) according to the magnification and reduction ratio of characters, and reference numeral 28 is optional in the range of 0 to 7 dots for pattern converted characters. Offset register for giving an offset, reference numeral 29 is an offset data generator for generating offset data ("0" representing non-display) with the number of dots in accordance with the offset value of the offset register 28. .

Reference numerals 31 to 49 each constitute a component for generating a dot interpolation address, and reference numeral 31 denotes a register for storing dot writing width DX1 in the sub-scanning direction including an x component. Reference numeral 32 denotes a register for storing dot indentation width DX2 in the main and scanning directions including the x component, and reference numeral 33 denotes an initial value in the sub-scanning direction including the x component (initial address: X1). init), the reference numeral 34 denotes a register for storing the dot-indentation width DY1 in the sub-scanning direction containing the y component, and the reference numeral 35 denotes a register in the main / scanning direction containing the y component. A register for storing dot indentation width DY2 and reference numeral 36 are registers for storing an initial value (initial address: Y1 init) in the sub-scanning direction including the y component. The dot interpolation addresses stored in the above registers 31 to 36 are each composed of data of the integer part and data of the fractional part.

Reference numeral 37 is an addition circuit ADD-A for adding the contents of the register 31 and the contents of the register 42 indicating the dot positions in the sub-scanning direction including the x component, and the reference number ( 38 is an addition circuit ADD-B for adding the contents of the register 32 and the contents of the register 44 indicating the dot positions in the main and scanning directions including the x component, and reference numeral 39 denotes the above. An addition circuit (ADD-C) for adding the contents of the register 34 and the contents of the register 46 indicating the dot positions in the sub-scanning direction including the y component, and reference numeral 40 denotes the register 35. An addition circuit (ADD-D) that adds the contents of the register 48 that indicates the dot position in the main / scanning direction including the contents of y and the y component.

Reference numeral 41 selects the contents of the register 33 at the start of the dot interpolation process for one character, and then selects the output of the addition circuit 37 each time one main scan / scanning is executed. The selector and reference numeral 42 are registers for storing new dot addresses at the time of dot interpolation represented by an integer part and a fractional part including the x component selected by the data selector 41, and the reference numeral 43 to start scanning and scanning. Selects the contents of the register 42, and then selects the output of the addition circuit 38 for each one-dot interpolation process, and reference numeral 44 denotes the x component selected by the data selector 43. This register is used to store the new dot address for dot interpolation. Reference numeral 45 selects the contents of the register 36 at the start of the dot interpolation process for one character, and then selects the output of the addition circuit 39 each time one main scan / scanning is executed. The selector and reference numeral 46 are registers for storing the new dot address at the time of dot interpolation represented by the integer part and the decimal part including the y component selected by the data selector 45, and the reference number 47 to start scanning and scanning. Selects the contents of the register 46 and selects the output of the addition circuit 40 each time the interpolation process is performed for one dot, reference numeral 48 is selected by the data selector 47. This register stores the new dot address for dot interpolation containing the y component. Reference numeral 49 denotes a selection control circuit SC for controlling the respective data selectors 41, 43, 45, 47.

Reference numeral 50 is a register for storing a comparison value for performing comparison with an interpolation value described later, that is, a threshold value th.

Reference numeral 51 denotes a Chinese character pattern memory KPM in which character pattern data including predetermined Chinese characters including character characters is stored in dot matrix units (16 x 16 dots). Reference numeral 52 is a one-character buffer constructed by a high speed RAM that stores a dot pattern for one character read from the Chinese character pattern memory 51. Here, the dot pattern for one character is stored in the state filled with the bit pattern of the dot " 0 ". Reference numeral 53 selectively outputs dot information of four grids of one grid surrounding new dots according to the values of the respective integer portions of the registers 44 and 48 of the character pattern data stored in the one-character buffer 52. Bit selection circuit. Reference numeral 54 is a register that stores four bits of information output from the bit select circuit 53.

Reference numerals 55 to 57 recognize a pattern of dot information output from the bit select circuit 53, and a dot pattern recognition unit (DSP) for selectively switching and controlling the interpolation value of a new dot surrounded by four dots. Reference numeral 55 recognizes the dot pattern state of four points in the bit contents of the register 54, and at the time of the specific dot pattern state described later, It is a discrimination control circuit that controls the bit selection circuit 53 to sequentially select dot information. Reference numeral 56 is a register that stores 4-bit information read by the control of the discrimination control circuit 55. Reference numeral 57 denotes a dot for outputting a 1-bit interpolation value switching selection signal according to the dot pattern state between the two grid dot information read out under the control of the discrimination control circuit 55 and the dot information of the register 54. Discrimination circuit.

Reference numeral 58 denotes the value of the fractional part stored in the register 44 (the main / scan direction offset value including the 5-bit x component) and the dot information and the dot discrimination circuit 57 of the four points stored in the register 54. The interpolation table ROM outputs the interpolation value Qxy of a new dot in an area surrounded by the four points of dot information by using the 1-bit interpolation value switching selection signal output from the input information. Here, a mask ROM of 256K bits (32K x 8 bits) is used to output an 8-bit (0-255 level) interpolation value according to a 15-bit read address.

Reference numeral 59 denotes a comparator which compares the interpolation value output from interpolation table ROM 58 with a threshold value stored in register 50, and a dot (brightness point) when the interpolation value exceeds the comparison value, that is, the threshold value. Outputs a signal of "1" level indicating. Reference numeral 60 sequentially stores the dot information output from the comparator 59, and outputs it to the CPU bus 12 for every write bit unit (here, 8 bit units) of the memory in which the character pattern is developed. to be.

3 to 11 are diagrams for explaining the operation of the above embodiment, respectively.

3A to 3F show dot information (dot pattern) of one grid and four points surrounding each new dot generated by interpolation processing, the level classification of the interpolation value set in the interpolation table ROM 58, the table form and It is a figure which shows the relationship of. Here, the interpolation value is expressed by the luminance (contrast level) of 0 to 255 steps, and a part of the divided area is shown by the contour line.

4 is a view for explaining a table-type selection switching example when only one dot of one dot pattern of four grids is on ("1") or off ("0"), and the dot pattern recognition unit (DSP) For example, when only one point of four surrounding dots D0, D1, D2, and D3 is off, that is, "0" (D0 denoted by a white circle in the drawing), and a specific dot (Da) of the surrounding grid is shown. Recognizes the on / off state of Db) and selects the co-owner type table T1 as shown in FIG. 3d when Da, Db = " 1 ", and at least one of Da, Db is " 0 " On the rear side, a table T0 having an inclined shape as shown in Fig. 3f is selected. In this way, the interpolation value of the new dot located in the dot region of four points is determined again by the dot state around the dots when the four dots form the above-described specific pattern.

5A to 5D show various pattern conversion examples, in which Sm represents the main and scanning directions, Ss represents the sub and scanning directions, respectively, and FIG. Plane), drawing (b) shows an inclined body, drawing (c) shows a bottom-order inclined body, and drawing (d) shows a rotating body, respectively.

6A to 6B are diagrams for explaining the relationship between the output object of the dot interpolation process, that is, the image output object and the main / scanning direction Sm and the sub-scanning direction Ss at the time of dot interpolation. . The figure (a) shows the direction of main, scanning and sub scanning at the time of dot interpolation at the time of CRT display, and the figure (b) shows the main, scanning and sub scanning at the time of dot interpolation at the time of printing out. Each direction is shown. Thus, in the dot interpolation process at the time of CRT display output and the dot interpolation process at the time of printout, the main, scanning direction, and sub-scanning direction are reversed.

7 is a diagram showing a correspondence relationship between various types of setting data.

FIG. 8 is a diagram showing a relationship between a character pattern-transformed by dot interpolation processing and a rectangle (including a square) circumscribed to the character.

9 is a diagram showing an example of setting of the character pitch CP and the row pitch LP for various modified characters.

FIG. 10 is a diagram showing an example of development of underlines for various deformed characters.

11 is a diagram for explaining the zoning operation.

The operation of one embodiment of the present invention will now be described. At the time of dot interpolation, the CPU 10 performs initial setting of various registers in accordance with dot interpolation specification information input from the outside. That is, the CPU 10 sets the comparison value for comparison with the interpolation value generated in the interpolation table ROM 58, that is, the threshold value th in the register 50, and then sets the reference value according to the designated magnification. Calculate the dot indentation width (dx, dy: the inverse of magnification / reduction ratio) and set it in the registers 26 and 27, and when it is a rotation or inclined body, the trigonometric function data according to the designated angle ( sin, cos, tan) is set in the trigonometric function table 24. Dot interpolation is then performed according to the setting data (sin, cos, tan) of these registers 26, 27 and trigonometric function table 24. Initial values (initial value addresses: X1 init, Y1 init) and dot notation widths DX1, DY1, DX2, and DY2 for generating an address are calculated, and these data are set in the registers 31 to 36 and expanded at the same time. Calculate each data of V size and H size according to the variation of character height and character width caused by pattern conversion such as rotation. Set the registers 21, 22, and further calculating the number of zone when this zone is set to cause nine minutes of this data to the register 25. Also, when the dot interpolated character is shifted within the range of 1 to 7 dots (for example, when printing out the interpolated ruby ruby character (small letter) and half-width character), 1 The number of dots in the main / scanning direction of the pattern-converted character is not a multiple of the write width (8 dots) of the image memory to be outputted, and the byte on the image memory side is changed. When it is necessary to match the boundary (write width), the offset value is set in the offset register 28 within the range of 1 to 7 dots.

After finishing the initial setting of each register as described above, the CPU 10 starts the process of generating the dot interpolation address as follows.

First, the whole operation will be described taking as an example the case where dot interpolation is performed with a stagnation (or a long body or a flat body) as shown in FIG. 5A as an output object (for example, simple enlargement / reduction). In this dot interpolation, "0" is set in the register 31, dot notation width "dx" in the register 32, initial value "sx" in the main / scanning direction sm in the register 33, and in the register 34. The dot engraving width "dy", "0" in the register 35, and the initial value "sy" in the sub-scanning direction Ss are set in the register 36, respectively.

The dot notation widths dx and dy set in the registers 32 and 34 are given as inverse values of the enlargement / reduction ratio. In the register 33, Ix having [Ix = (dx-1) / 2] is given as an initial value Sx, and the register 36 has Iy having [Iy = (dy-1) / 2]. It is given by the initial value Sy. Here, when dx or dy is less than or equal to "1" (that is, when enlarged), Ix or Iy becomes negative to display an address outside the original character pattern storage area of the one-character buffer 52, and dx or dy is " 1 'or more (i.e., at the time of reduction), Ix or Iy is positive to display the address in the original character pattern storage area of the one-character buffer 52. In addition, the register 50 is compared with the interpolation value output from the interpolation table ROM 58, and an arbitrary level (0-255 level) for determining which level or more of the new dot is a meaningful dot. The comparison value, i.e. threshold th, is set.

The CPU 10 reads the dot pattern data for one character to be interpolated from the Chinese character pattern memory 51 and writes the character pattern data into the one-character buffer 52. At this time, the one-character buffer 52 stores the dot pattern data for one character to be interpolated as described above in a state surrounded by dots of "0" meaningless.

After taking out the data to the registers 31 to 36 and the interpolation target character pattern to the one-character buffer 52, the data to be the initial address stored in the registers 33 and 36 under the control of the selection control circuit 49 ( Sx and Sy are selected by the data selectors 41 and 45 and stored in the corresponding registers 42 and 46, respectively. In addition, when starting scanning and scanning, the data Sx and Sy stored in the registers 42 and 46 are selected by the data selectors 43 and 47 and stored in the corresponding registers 44 and 48, respectively. .

The data Sx and Sy stored in these registers 44 and 48 are given the value of the integer part to the bit selection circuit 53, and the value of the fractional part is given to the interpolation table ROM 58.

The bit select circuit 53 selects the dot information of one grid and four points from the one-character buffer 52 according to the input value of the integer part, and supplies it to the interpolation table ROM 58. At this time, in magnification (dx, dy <1), since the bit selection circuit 53 is given a negative value indicating an address other than the original character pattern storage area of the one-character buffer 52, the original character pattern storage area Dot selection is started from dot information of one grid and four points including other dots. At the time of reduction (dx, dy> 1), since the bit selection circuit 53 is given a positive value indicating an address in the original character pattern storage area of the one-character buffer 52, the original character pattern storage area Dot selection is started from dot information of four points in one grid.

The interpolation table ROM 58 stores each offset (10 bits) from the registers 44 and 48, dot information of four points of periphery from the bit selection circuit 53, and the dot pattern recognition unit DSP. The 1-bit interpolation value switching selection signal is used as input information, and an 8-bit interpolation value Qxy corresponding to the content is output. At this time, when the dot pattern of one grid and four points output from the bit selection circuit 53 is recognized by the dot pattern recognition unit DSP and is a specific dot pattern as shown in FIG. Recognizes the on / off state and outputs a 1-bit interpolation value switching selection signal corresponding to the dot state. That is, for example, as shown in FIG. 4, when only one point of the four surrounding dots D0, D1, D2, and D3 is off, that is, "0" (D0 indicated by white circles in the drawing), Recognizes the on / off state of the specific dots Da and Db of the lattice, and if Da, Db = " 1 ", selects the co-owner type table T1 as shown in FIG. 3d, and at least Da, Db If either is "0", the interpolation switching selection signal is output so as to select the inclined table T0 as shown in FIG. 3F. In addition, when only one point among four surrounding dots D0, D1, D2, and D3 is on, that is, "1" (D0 shown as a circle drawn with a white circle in the drawing), a specific dot of the surrounding grid is again. Recognizing the on / off state of (Da, Db), and Da, Db = " 0 " selects a co-owner type table T1 as shown in FIG. 3a, and at least one of Da, Db is " 1 ", an interpolation value switch selection signal for selecting the inclined table T0 as shown in FIG. 3E is output. In this way, the interpolation value of the new dot located in the dot area of four points is determined by the dot state around it again when the four dots form a specific pattern as described above. The interpolation value of 8 bits (0 to 255 level) output from the interpolation table ROM 58 is input to the comparator 59, meaning that the interpolation value compared to the threshold stored in the register 36 exceeds the threshold. A signal of level "1" indicating that the dot is present is output, and a signal of level "0" indicating that the dot is meaningless if the interpolation value does not exceed the threshold.

On the other hand, after an interpolation value of one dot is output from the interpolation table ROM 58, the contents of the register 44 and the contents of the register 32 are added by the addition circuit 38, and at the same time, the contents of the register 48 and the register. The contents of (35) are added by the addition circuit 40, and the data of each addition result is selected by the corresponding data selectors 43 and 47 under the control of the selection control circuit 49, and the registers 44 and 48 ) At this time, among the registers 32 and 35 showing the dot engraving widths in the main and scanning directions, the dot writing width dx corresponding to the designated magnification / reduction ratio is set in the register 32, and the register 35 has a stagnation ( Or "0" is set as described above since the dot interpolation of the long body and the flat body, the contents (dot address) of the register 44 is the dot notation width (dx) in accordance with the enlargement and reduction ratio specified for each interpolation process of 1 dot. The contents of the register 48 are not updated as a result, but the data at the initial setting is maintained as it is. In addition, the contents of the register 42 and the contents of the register 31 are added by the addition circuit 37 at the end of one main scan / injection, and the contents of the register 46 and the contents of the register 34 are added. Is added by the addition circuit 39, and the data of each addition result is selected by the corresponding data selectors 41 and 45 under the control of the selection control circuit 49 and stored in the registers 42 and 46, respectively. . At this time, among the registers 31 and 34 indicating the dot-indentation widths in the sub-scanning direction, the dot-indentation width dy in accordance with the designated magnification / reduction ratio is set in the register 34, and the register 31 has a stagnation ( Or "0" is set as described above since the dot interpolation of the long body and the flat body, and the content (dot address) of the register 46 is the dot indentation width (depending on the designated magnification / reduction ratio each time one scanning or scanning is executed). dy), but the contents of the register 42 are not updated as a result and the data at the initial setting is retained.

In this way, interpolation values for the new dot addresses are sequentially output from the interpolation table ROM 58, and the interpolation values are compared with the threshold value th of the register 50 by the comparator 59 to generate new dot information.

The new dot information after interpolation processing output from the comparator 59 is stored in the shift register 60 in turn and sent to the CPU bus 12 in units of 1 byte.

At this time, in the case where the dot interpolated character pattern data sent to the CPU bus 12 is written to the line buffer 18 of the printing control unit 17, for example, for printouts, 1 is written to the offset register 28. The offset value within the range of 7 to 7 dots is set (for example, when the dot interpolated ruby ruby character is moved below i (i = 1, 2, ..., 7) dots at the time of printout), or pattern conversion The number of dots in the scan direction in the direction of the scanned character does not need to be a multiple of the write width (8 dots) of the image memory to be output, and must be combined with the byte boundary (write width) on the image memory side. In the case where the value i is set, the offset data generation unit 29 generates offset data (i " 0 ") in accordance with the offset value i of the offset register 28. Prior to initiation of injection or injection (60) ), And subsequently dot interpolated data, i.e., converted character pattern dots, is written.

The above operation was performed when stagnant (or long or flat) output targets were used. For example, when the dot interpolation address is generated when the rotating body is output target, each of the registers 31 to 36 is used. With respect to the predetermined rotation angle, data is set in which predetermined trigonometric function data in the trigonometric function table 24 are included as one element. That is, if the designated rotation angle is [θ °] and the number of dots in the x direction of the original font is [a + 1],

In the register 31, DX1 = -dxsinθ °

In the register 32, DX2 = dxcosθ °

In the register 34, DY1 = dycosθ °

In the register 35, DY2 = dysin?

θ°

90°일 때 X1 init=1/2a-1/2(a+1-dx)cos2θ°In addition, the registers 33 and X1 init and the registers 36 and Y1 init are (1) 0 °.

θ °

X1 init = 1 / 2a-1 / 2 (a + 1-dx) cos2θ ° at 90 °

Y1 init = -1 / 2 (1-dy) -1/2 (a + 1-dx) dy / dx sin2θ °

θ°

180°일때(2) 90 °

θ °

180 °

X1 init = a + 1/2 (1-dx) -1/2 (b + 1-by) dx / dy sin2θ °

Y1 init = 1 / 2b + 1/2 (b + 1-dy) cos2θ °

θ°

270°일때(3) 180 °

θ °

At 270 °

X1 init = 1 / 2a + 1/2 (a + 1-dx) cos2θ °

Y1 init = b + 1/2 (1-dy) +1/2 (a + 1-dx) dy) / dx sin2θ °

(4) When 270 ° <θ ° <360 °

X1 init = 1/2 (1-dx) +1/2 (b + 1-dy) dx / dy sin2θ °

Y1 init = 1 / 2b-1 / 2 (b + 1-dy) cos2θ ° are set respectively.

As described above, each set value (DX1, DX2, DY1, DY2, X1 init, Y1 init), such as dot indentation width and initial address, including trigonometric function data according to the rotation angle (θ °), is calculated, respectively. After setting in the registers 31 to 36, a dot interpolation address generation process for the main, scanning direction and sub-scanning direction as described above is executed in sequence, thereby obtaining a rotating character pattern dot according to the designated angle (θ °). Lose.

In addition, during the generation process of the dot interpolation address when the oblique character is used as the output target, the predetermined trigonometric function in the trigonometric function table 24 in accordance with the specified inclination angle is assigned to a specific register in the registers 31 to 36. Data including data as one element is set.

That is, if the designated inclination angle is "θ °", the number of dots in the x direction of the original font is [a + 1] and the number of dots in the y direction of the original font is [b + 1], 0 ° <θ. In the range of ° <90 °, the register 31 has DX1 = dxtanθ °

In register 32, DX2 = dx

Register 34 contains DY1 = dy.

Register 35 has DY2 = 0

Are set respectively, and in the register 33, X1 init = 1/2 (1-dx)-(b + 1-dy) dx / dy tanθ °, and in the register 36, Y1 init = -1 / 2 ( 1-dy) are set respectively.

As described above, the respective set values (DX1, DX2, DY1, DY2, X1 init, Y1 init), such as dot indentation width and initial address, including trigonometric function data according to the inclination angle θ °, are respectively calculated. Italic character pattern inclined according to the designated angle (θ °) by sequentially performing dot interpolation address generation processing for the main, scanning direction and sub-scanning direction as described above after setting in the registers 31 to 36; You can get a dot.

As described above, according to each set value (DX1, DX2, DY1, DY2, X1 init, Y1 init) such as dot indentation width and initial address including trigonometric function data according to the designated angle θ °, A dot interpolation address generation process for the main, scanning direction and sub-scanning direction is executed in order to obtain new dot information based on the generated dot interpolation address. The new dot information is sequentially stored in the shift register 60 as described above, and becomes an output object via the CPU bus 12 in units of bytes (8 bits). For example, it is written to the line buffer 18 of the print control unit 17.

At this time, since the line buffer 18 is usually composed of a bit width (for example, 8 × 3 = 24 dots vertically) corresponding to the dot structure of the printed character height, the modified characters such as the above-mentioned rotational characters and italic characters. Is not accommodated in the size of 24 dots except for the reduction pattern. Therefore, in such a case, the characters converted by the CPU 10 to which the newly generated character pattern is divided into a plurality of zones at the time of initial setting of the register into a plurality of zones, and the angle, enlargement / reduction ratio, etc. of the character are converted. The data of the register 25 is decreased (-1) each time the pattern is written in the unit of the zone by calculating the number of zones for the zone and setting the data indicating the number of zones in the zone designation register 25. Until the contents become "0", the pattern data of each zone is treated as the same character pattern.

In other words, for the area designated by the area designation register 25, continuous dot factor designation is executed without interposing an area (line space) between the patterns. An example of the zone division at this time is shown in FIG.

The means for calculating the number of zones includes a rectangle (square) in the x and y directions that circumscribes the characters converted (deformed) at a designated rotation angle, tilt angle, enlargement, and reduction ratio, as shown in FIGS. 7 and 8. ), And the number of dots (x, y dots) of the two sides of the squares which are in contact with each other, and is set in the registers 21 and 22 as data of V size and H size at the initial register setting. Therefore, it can be easily recognized. That is, for a character converted at an angle, the writing (handling) of the character is performed based on a horizontal and vertical rectangular area that circumscribes the character, for example, dot interpolation in the case of a print outer. At the time of processing, the area number can be easily obtained by dividing the H size data stored in the register 22 by the bit width &quot; 24 &quot; of the line buffer 18, and at the time of dot interpolation processing at display output. By dividing the V Size data stored in (21) by the bit width &quot; 24 &quot; in one display line, the number of zones can be easily obtained.

Further, by arbitrarily giving arbitrary zoning data to the zoning register 25, image data of the designated same zone can be continuously and repeatedly image developed. As a result, the character pattern deformed by the dot interpolation process can be printed or displayed as a modified character pattern which is partially or entirely redundant.

The V size and H size data described above are also referred to when setting the character pitch and when processing the underline / radiation. That is, the characters such as the inclination and rotation obtained by dot interpolation having an arbitrary inclination angle in the scanning direction as described above have the height (character height) and width (character width) of the entire character being inclined angle or in addition to that. It varies depending on the reduction factor. Therefore, when the above-described modified characters are outputted in the usual line, column direction (x, y direction), the character pitch, underline / line, etc. cannot be determined by the existing fixed parameter designation means.

Therefore, the above-mentioned circumscribed rectangle is also treated as the body face of the character in the processing of the character pitch, underline / radiation, and the like. These processing means will be described below.

First, the processing operation of the character pitch will be described. When the dot interpolation process for one character is executed as described above and a newly generated dot image for one character is to be outputted, for example, each time it is developed (written) in the line buffer 18 in the print control unit 17. The CPU 10 determines whether or not the contents V size of the register 21 have been updated. If the contents of the register 21 are not updated, the print control unit 17 serves as control data for displaying the character pitch of the data (V size) stored in the register 21, plus the value of the value 1/2. The pitch of the characters to be supplied to and expanded on the line buffer 18 is controlled. When the contents of the register 21 are updated, 1/4 of the sum of the data before the update and the updated data is stored in the specific register area at the time of the update and stored in the specific register area. Is added to the updated data stored in the register 21 again and supplied to the print control unit 17 as control data indicating character pitch, and the pitch of the characters developed on the line buffer 18 is controlled.

Thus, for a character converted at an angle, the writing (handling) of the character is performed based on the horizontal and vertical rectangular area that circumscribes the character, so that the width of the rectangle (in the case of printout) The pitch between adjacent characters is determined along V size and H size for display output. The pitch control as described above is also performed for the row pitch. FIG. 9 shows an example of setting the character pitch CP and the row pitch LP for various modified characters at this time.

In addition, the above pitch control always determines the pitch while considering the area occupied by adjacent characters (circumscribed rectangle). However, in order to simplify the processing, the pitch control is based on the value of the register 21 (or register 22) at that time. You may take control means for determining.

Next, the operation at the time of outputting the underline / radiation on the basis of the circumscribed rectangle described above will be described. In this case, the data V size stored in the register 21 is referred to in the case of printout, and the data H size stored in the register 22 is referred to in the case of display output. Here, the processing operation of the underline / radiation will be described taking the case of the printout as an example. The underline / radiation control unit 23 installed in the print control unit 17 draws a line of underline or radiation on the line buffer 18 according to the underline / radiation instruction included in the print control information input through the CPU bus 12. However, for the deformed characters such as rotation and italic type as described above, it is not possible to respond to the line expansion by the normal character width.

Therefore, if the contents (V size) of the register 21 are always inputted, and there is an indication of the underline / radiation, the underline / radiation dot pattern is generated with the line length in accordance with the contents of the update data of the register 21 at that time, and the line The pattern is developed on the buffer 18 in correspondence with the character.

FIG. 10 shows an example of development of underlines for various modified characters at this time.

As described above, the character pattern having a predetermined dot matrix configuration represented by X and Y coordinates is interpolated by giving a predetermined angle at least in the main, scanning direction, or sub-scanning direction, and is rotated or inclined. A pattern converter for obtaining a pattern, comprising: calculating a rectangular area circumscribed on an XY line with respect to a character frame of a pattern converted with the specified angle, and controlling character spacing in units of the rectangular area; The character spacing can be always appropriate for each deformed character, and a character interpolation control method of a character output device having a high degree of character arrangement function for rotating characters, oblique body characters, and the like can be realized.

Claims (2)

Pattern conversion to dot-interpolate a character pattern having a predetermined dot matrix configuration represented by X and Y coordinates at least in a main, scanning direction, or sub-scanning direction by dot interpolation to obtain a rotated or inclined deformed character pattern. A method for controlling character interpolation of a mechanism, the method comprising: calculating a rectangular area circumscribed on an XY line with respect to a character frame of a pattern-converted character having the designated angle, and controlling character spacing in units of the rectangular area; Character interpolation control method comprising a. The method of claim 1, wherein the character spacing control step comprises the steps of: storing distance information in the main / scanning direction of the rectangular area by the first storage means 22, and by using the second storage means 21; Storing distance information in the sub-scanning direction, controlling the character pitch (CP) based on the contents of the first storage means (22), and the contents of the second storage means (21). Character interpolation control method comprising the step of controlling the row pitch (LP) on the basis.

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