KR900007681B1 - Dot interpolation control system - Google Patents

Abstract

The dot interpolation control system includes a pair of registers for designating initial addresses of interpolated dots along the main scanning direction. Another pair of registers designates a dot picth along the main scanning direction, and still another pair of registers designats a dot pitch along the subscanning direction. Data pairs of x and y components, which selectively include trigonometric function data representing a designated rotation or inclination angle, are set in the correspponding registers. Dot interpolation of a character pattern is performed by main scanning and subscanning in accordance with the contents of the respective registers, thereby obtaining a rotated or inclined character on the basis of the designated angle.

Description

Dot interpolation control method

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

Figure 2 is a block diagram showing the configuration of the main portion in one embodiment of the present invention.

3 to 11 are views for explaining the operation of the above embodiment, respectively, and FIGS. 3A to 3F respectively show dot information (dots) of four points of one lattice surrounding a new dot generated by dot interpolation processing. Pattern) and the relationship between the level classification of the interpolation value set in the interpolation table ROM and the table type.

4 is a diagram for explaining an operation of changing the selection of the table type.

5 (a) to (d) are diagrams showing conversion examples of patterns, respectively.

6 (a) and 6 (b) show the main and sub-scanning directions when displaying CRTs and the main and sub-scanning directions when printing outs.

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

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

9 is a diagram showing a setting example of pitches and row pitches of characters for various modified characters.

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

11 is a view for explaining division means of a zone.

* 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: Parallel-to-serial 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

13: disembarkation / radiation control part

24: trigonometric 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 selection 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 apparatus used for a document producing apparatus for handling character font information of a dot matrix structure, a character output apparatus, and the like.

In a device that handles a character font having a prescribed dot matrix configuration, such as a character writing device, when the character font having a prescribed dot matrix configuration has a function capable of expanding and contracting at a certain magnification, conventionally, FIG. As shown in a) to (b), a so-called simple enlargement and reduction method of simply increasing or deleting dots in the original pattern pattern (SD &) has been adopted.

Such conventional expansion / contraction means can be realized relatively simply and inexpensively. However, for example, a character form intended to be inherently expressed by the pattern shape to be output, such as a stepped portion in the inclined line portion becomes prominent. There was an absurdity that was deviated from, resulting in unnatural character expression that was difficult to recognize.

In addition, in the conventional dot interpolation means as described above, when the original character pattern or the character pattern having an arbitrary magnification / reduction ratio is slanted or rotated at an arbitrary angle, it is easily obtained. In addition, even if the deformation range was largely restricted, distortion was generated in the converted character pattern, the conversion precision was greatly lowered, and high fidelity pattern conversion was not possible.

In addition, as for the deformed characters such as the rotation character or the oblique character, the character width or the height of the dot interpolated character or one of them is changed in various ways by the designated magnification / release ratio or angle, and in particular, the magnification and the expansion. In the case of tilting, for example, the converted dot image for one character does not enter one row of image storage space (e.g., an image line buffer), and a portion of the character is so-called as a normal character output means. There is an irregularity in the handling of the character image, such as a part is formed and the characters are overlapped in multiple lines, and the output is separated. Also, if the image of any slice width is repeatedly printed, for example, printing, the functional irrationality cannot be met. Viscosity occurred.

The present invention has been made in view of the above-described circumstances. Even when the original font is deformed by an arbitrary magnification, angle, etc. by dot interpolation processing, even if the character pattern developed on the image memory exceeds the prescribed row width, It is an object of the present invention to provide a dot interpolation apparatus capable of dot development by treating the character pattern as one itself and at the same time continuously dot developing any partial image at any number of times.

The present invention relates to an interpolation apparatus for dot interpolating a character pattern having a predetermined dot matrix configuration in at least the main, scanning direction, or sub-scanning direction, wherein the dot interpolation address and the x component in the main and scanning directions represented by the x component and the y component. Means for generating dot interpolation based on the dot interpolation address in the sub-scanning direction expressed by the y component, and zone specifying means for dividing the generated dot interpolation information with a slice width in a predetermined dot unit, and The original character font is dot-contained by providing a structure which transmits and controls image data of the area | region designated by the area | region designation means, and expands, rotates, or inclines the deformed character by dividing the image into predetermined | prescribed division of the dot width unit, and a dot of the original font When the pattern is deformed at an arbitrary magnification or angle by interpolation, the character pattern developed on the image memory Even if the prescribed width is exceeded, the character pattern can be treated as a single dot, and dot development can be performed, and the random partial image can be dot-developed continuously at any number of times.

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 the size (V size) corresponding to the width in the sub-scanning direction (interval / scan interval x number of times) after conversion in pattern conversion, and reference numeral 22 denotes the same note. This register indicates the size (H size) corresponding to the width of 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 (triangular function data) according to the designated angle in the case of the oblique rotation of characters. Reference numeral 25 denotes a zone designation register for dividing zones in units of the reference character height from the character pattern after the conversion process exceeding the reference character height in pattern conversion. Reference numerals 26 and 27 denote registers for storing the dot notation widths (dx, dy) according to the enlargement / reduction ratio of the characters, and reference numeral 28 selectively in the range of 0 to 7 dots for pattern converted characters. The offset register for giving an offset, reference numeral 29, is an offset data generation unit that generates 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 x components. , Reference numeral 32 denotes a register for storing dot engraving width DX2 in the scanning and scanning direction including x components, and reference numeral 33 denotes an initial value of the scanning and scanning direction including x components (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 for 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 denotes an addition circuit ADD-A for adding the contents of the register 31 and the contents of the register 42 indicating the dot position in the sub-scanning direction including the x component, and the reference number ( 38 is an addition circuit ADD-B which adds the contents of the register 32 and the contents of the register 44 indicating the dot position in the scanning and scanning direction including the x component, and reference numeral 39 denotes the above. An addition circuit (ADD-C) for adding the contents of the register 46 indicating the dot position in the sub-scanning direction including the contents of the register 34 and the y component, and reference numeral 40 denotes the register 35. An addition circuit (ADD-D) that adds the contents of the register 48 indicating the dot position in the main and scanning directions including the contents of 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 a main scan / scan is executed. Denotes a new dot address for dot interpolation represented by an integer part and a fractional part including an x component selected by the data selector 41, and reference numeral 43 denotes the register at the start of scanning and scanning. A data selector for selecting the contents of (42), and then selecting the output of the addition circuit 38 for each dot interpolation process, and reference numeral 44 denotes a dot interpolation including the x component selected by the data selector 43; This register stores the new dot address of the hour.

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 a main scan or scan is executed. Denotes an integer portion containing the y component selected by the data selector 45, and a register for storing a new dot address in dot interpolation represented by a decimal number. A data selector which selects the contents of the register 46, and then selects the output of the addition circuit 40 each time the interpolation process is performed for one dot, and the reference numeral 48 denotes the y component selected by the data selector 47. Is a register for storing a new dot address during dot interpolation.

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 of a predetermined dot matrix unit (16 x 16 dots) containing Chinese characters is stored. 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 dot patterns output from the bit select circuit 53, and dot pattern recognition units (DSP) for selectively switching and controlling the interpolation values of new dots surrounded by four dots. Reference numeral 55 recognizes a dot pattern state of four points in the bit contents of the register 54, and at the time of the dot pattern state of the characteristic described later, It is a discrimination control circuit that controls the dot 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. An interpolation table ROM that outputs an 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 for comparing the interpolation value output from the interpolation table ROM 58 with the threshold stored in the register 50, and an dot (bright point) when the interpolation value exceeds the comparison value, that is, the threshold value. Outputs a signal of level " 1 " Reference numeral 60 sequentially stores the dot information output from the comparator 59, and outputs it to the CPU bus 12 for each 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. 3 (a) to 3 (f) 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, It is a figure which shows the relationship with a table form.

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.

FIG. 4 is a diagram for explaining a table-type selection switching example when only one dot of the dot patterns of one grid and four points is turned on ("1") or off ("0"). 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 a co-owned table (T1) as shown in FIG. 3d when Da, Db = " 1 " If one is "0", the inclined table T0 as shown in FIG. 3 (f) is selected. In this way, the interpolation value of the new dot positioned in the dot region of four points is determined by the dot state around the dots when the four dots form the above-described specific pattern.

5 (a) to 5 (d) show various pattern conversion examples, in which Sm represents the main / scanning direction, Ss represents the sub-scanning direction, and FIG. Or (b) is a slant body, (c) is a bottom trimmer, and (d) is a rotating body.

6 (a) and 6 (b) illustrate the relationship between the output object of the dot interpolation process, that is, the image output object and the main / scan direction Sm and the sub-scan direction Ss at the time of dot interpolation. It is a figure.

(A) shows the directions of main, scanning and sub scanning at the time of dot interpolation at the time of CRT display, and (b) shows the main, scanning and sub scanning at the time of dot interpolation at the time of printing out. Each direction is shown. In this way, in the dot interpolation process at the time of CRT display output and the dot interpolation process at the time of printout, the main and scanning directions and the sub-scanning directions are inverted.

7 is a diagram showing a correspondence relationship between various setting data. FIG. 8 is a diagram showing a relationship between a character pattern-converted by dot interpolation processing and a rectangle (including a square) that circumscribes the character.

FIG. 9 is a diagram showing a practical example of the character pitch CP and the hang pitch LP for various modified characters. FIG. 10 is a diagram showing an example of development of underline for each type of deformed character.

11 is a diagram for explaining the zoning operation. The operation of one embodiment of the present invention will now be described. In dot interpolation, the CPU 10 performs initial setting of various registers in accordance with dot interpolation designation information input from the outside. That is, the CPU 10 sets a comparison value for comparing the interpolation values generated in the interpolation table ROM 58, that is, a threshold value th in the register 50, and then becomes a reference point according to the designated magnification / reduction ratio. Calculate the engraving width (dx, dy: inverse of magnification / reduced magnification) and set it in the registers 26 and 27, and when it is rotated or inclined again, the trigonometric function data (sin, cos, tan) is set in the trigonometric function table 24.

Then, initial values (initial value addresses: X1 init, Yl init) and dots for generating the dot interpolation address according to the setting data (sin, cos, tan) of these registers 26, 27 and the trigonometric function table 24. Calculate the engraving widths DX1, DY1, DX2, and DY2, set their data in the registers 31 to 36, and at the same time change the character height and character width caused by pattern conversion such as enlargement rotation. The data of the V size and the H size is calculated and set in the registers 21 and 22, and when the zone is divided, the number of zones is calculated and the data is set in the register 25. Also, when the dot interpolated character is shifted within the range of 1 to 7 dots at its output (for example, when printing out the interpolated ruby ruby character (small letter) and half-width character, etc.), 1 The number of dots in the image memory side of the image memory that is not a multiple of the write width (8 dots) of the image memory to be outputted. When it is necessary to match the boundary (write width) or the like, an offset value is set in the offset register 28 within a 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, for example, in the case where dot interpolation is performed with a stagnation (or stagnation, plane) as shown in FIG. 5A as an output target (e.g., simple enlargement / reduction). .

In this dot interpolation, the register 31 has a dot writing width "dx" in the "32" register 32, the note 33 in the initial scanning direction Sm and the dot in the register 34. The 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, dy) set in the registers 32 and 34 are given as inverse values of the magnification / reduction ratio. In the register 33, Ix having [Ix = (dx-1) / 2] is given as an initial value Sx, and the register 36 has 1y having [Iy = (dy-1) / 2]. It is given by the initial value Sy. Here, when dx or dy is equal to or smaller than "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. 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.

Then, 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 extraction of the data of 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. At the start of the main / scanning, the data Sx and Sy stored in the registers 42 and 46 are selected by the data selectors 43 and 47 to correspond to 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 select circuit 53, and the value of the fractional part is given to the interpolation table ROM 58. The bit selection circuit 53 selects 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 enlargement (dx, dy <1), since the bit selection circuit 53 is given a negative value indicating an address outside the original character pattern storage area of the one-character buffer 52, the original character pattern is stored. Dot selection is started from dot information of four grids of one grid including dots outside the area.

In 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 in total) from the registers 44 and 48, dot information of four points of surroundings 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 four points output from the bit select circuit 23 is recognized by the dot pattern recognition unit DSP and is a specific dot pattern as shown in FIG. Recognizes the on / off state of 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 a white circle in the drawing), Recognize the on-off states of the specific dots Da and Db of the lattice, and if Da, Db = " 1 ", select the co-owner type table T1 as shown in FIG. If at least one of Db is " 0 ", an interpolation value switching selection signal is output so as to select the inclined table T0 as shown in Fig. 3F. In addition, when only one point of four surrounding dots (D0, D1, D2, D3) is on, that is, "1" (D0 shown as a circle drawn in 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 the co-owner type table T1 as shown in FIG. If either side is "1", an interpolation value switching 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 again by the dot state around when the dot of four points forms a specific pattern as described above. When the 8-bit (0-255 level) interpolation value output from the interpolation table ROM 58 is input to the comparator 59 and the interpolation value stored in the register 36, that is, the interpolation value compared with the threshold value, exceeds the threshold value, A signal of level "1" indicating that the dot is meaningful 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 MOR 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 content of (35) is 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-indentation widths in the main / scanning direction, the dot-indentation 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 content (dot address) of the register 44 is the dot indentation width (dx) according to the enlargement / reduction ratio specified for each dot interpolation process. 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, each time one scan / injection is completed, the contents of the register 42 and the contents of the register 31 are added by the addition circuit 37, 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 Suntec control circuit 49 and stored in the registers 42 and 46, respectively. .

At this time, among the registers 31 and 34 indicating the sub-scan direction in the scanning direction, the dot 34 according to 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 because it is dot interpolation of a long body and a flat body. Therefore, the content (dot address) of the register 46 is the dot indentation width according to the designated magnification / reduced magnification ratio each time one main / injection 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, the interpolation value for the new dot address is output from the interpolation table MOR 58 in turn, and the interpolation value is compared by the comparator 59 with the threshold value th of the register 50 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, when the dot interpolation-processed 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 the printout, it is further set to 1 to 1 in the offset register 28. When offset values within the range of 7 degrees are set (for example, when the dot interpolated ruby letter is moved below i (i = 1, 2, ... 7) dots at the time of printout), or is pattern-converted. The number of dots in the main / scanning direction of the character does not need to be a multiple of the write width (8 dots) of the image memory to be the output direction, and must be combined with the byte boundary (write width) on the image memory side. In the case where (i) is set, the offset data generating unit 29 generates offset data (i " 0 ") in accordance with the offset value i of the offset register 28, and this data is mainly used. Prior to the start of injection, the shift register 60 Is set, 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 target is output target, each of the registers 31 to 36 is used. In the trigonometric function table 24 according to the designated rotational angle, data is set in which predetermined trigonometric function data is included as one element.

That is, if the designated rotation angle is [θo], 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].

Register 31 contains DX1 = dx.sin θo

Register 32 contains DX2 = dx.cos θo

Register 34 contains DY1 = dy.cos θo

In register 35, DY2 = dy.sin θo

Are set respectively.

In addition, in the register 33 (X1 init) and the register 36 (Y1 init), when (1) 0 ° ≤θ≤90 °

X1 init = 1 / 2a-1 / 2 (a + 1-dx) cos 2θo

Y1 init = -1 / 2 (1-dy) -1/2 (a + 1-dx) dy / dx sin 2θo

(2) When 90 ° ≤θo≤180 °

X1 init = a + 1/2 (1-dx) -1/2 (b + 1-dy) dx / dy sin 2θo

Y1 init = 1 / 2b + 1/2 (b + 1-dy) cos 2θ

(3) When 180 ° ≤θo≤270 °

X1 init = 1 / 2a + 1/2 (a + 1-dx) cos 2θo

Y1 init = b + 1/2 (1-dy) +1/2 (a + 1-dx) dy + dx sin 2θ

(4) When 270 ° ≤θo≤360 °

X1 init = 1/2 (1-dx) +1/2 (b + 1-dy) dx / dy sin 2θo

Y1 init = 1 / 2b-1 / 2 (b + 1-dy) cos 2θ

Set each of them.

As described above, each set value (DX1, DX2, DY1l, DY2, X1 init, Y1 init), such as dot indentation width and initial address, including trigonometric function data according to the rotation angle θo is calculated, and corresponding registers are respectively calculated. After setting in (31) to (36), by performing the dot interpolation address generation processing for the main / scanning direction and the sub-scanning direction as described above, a rotating character pattern dot according to the designated angle [theta] o is obtained.

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

That is, if the designated inclination angle is [a + 1] and the number of y-direction dots of the original font is [b + 1] as [θo] original port, 0 ° ≤θo≤90 In the range of °,

Register 31 contains DX1 = dx.tan θo.

Register 12 has DX12 = 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 tan θo, and in the register 36, Y1 init = -1 / 2 ( 1-dy) are set respectively. As described above, each set value (DX1, DX2, DY1, DY2, X1 init, Y1 init) including dot indentation width and initial address including trigonometric function data according to the inclination angle θo is calculated, and corresponding registers are calculated. After setting in (31) to (36), italic character pattern dots inclined according to the designated angle (θo) are executed by sequentially performing dot interpolation address generation processing for the main / scan direction and the sub-scan direction as described above. You can get it.

As described above, according to the 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 designated angle θo, The dot interpolation address generation processing for the scanning direction and the 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 configuration of the printed character height, the above-described deformation of the rotating body character and italic character is performed. Characters are not accepted in the size of 24 dots except for the reduction pattern.

Therefore, in such a case, the character 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, magnification, reduction ratio, etc. of the character are converted. By calculating the number of zones for and setting the data indicating the number of zones in the zone designation register 25, each time the pattern is written in units of zones, the contents of the register 25 are reduced (-). 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 rectangles in the x and y directions (squares) that circumscribe the characters transformed (modified) at a designated rotation angle / tilt angle / enlarge / reduced magnification ratio as shown in FIGS. 7 and 8. ) And the number of dots (x, y dots) of the two sides of the squares in contact with each other, and set them in the registers 21 and 22 as data of V size and H size at the initial register setting. 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, a dot in the case of a print outer. In the interpolation process, the area size can be easily obtained by dividing the H size data stored in the register 22 by the bit width 24 of the line buffer 18, and in the dot interpolation process in display output. The number of zones can be easily obtained by dividing the data of the V size stored in (21) by the bit width &quot; 24 &quot;

In addition, 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. Thereby, 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 / line. That is, the characters such as tilt, rotation, etc., obtained by dot interpolation having an arbitrary tilt 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 thereto. It varies depending on the reduction factor. Therefore, when the above-described modified characters are output in the image in the normal line, unidirectional (x, y direction), the character pitch or the underline / radiation 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 performed as described above and a newly generated dot image for one character is to be output, for example, 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 a control data for displaying the character pitch of the data (V size) stored in the register 21, plus the half value thereof. 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 at the time of the update. 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.

In this way, 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 (V for print outers). The pitch between adjacent characters is determined along size, 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), but simply adjusts the pitch based on the value of the register 21 (or register 22) at that time to simplify the processing. 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 the printout, and the data H size stored in the register 22 is referred to in the case of the display output. Here, the processing operation of the underline / radiation will be described taking the case of the print outer as an example. The underline / radiation control unit 23 provided 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 the rotation and italics, the line expansion by the normal character width cannot be taken.

Therefore, if the contents (V size) of the register 21 are always inputted and the direction of underline / radiation is indicated, a dot pattern of underline / radiation 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, according to the present invention, a dot interpolation apparatus for dot interpolating a character pattern having a dot matrix configuration in at least the main, scanning direction, or sub-scanning direction, the main / scanning direction represented by the x component and the y component. Means for generating dot interpolation based on the dot interpolation address and the sub-scan interpolation dot interpolation address represented by the y component, and for dividing the generated dot interpolation information with a slice width in a predetermined dot unit A zone designation means and a means for transmitting and controlling image data of the zone designated by the zone designation means, and the enlarged, rotated or inclined deformed characters are divided into zones of a predetermined dot width so that the image is expanded. When the character font is transformed with an arbitrary magnification or angle by dot interpolation, Even if more than the specified character patterns to be deployed haengpok, it is possible to treat the character pattern as one of its own at the same time being able to deploy a continuous dot image of any portion of any number of dots to be deployed.

Claims (1)

A dot interpolation apparatus for dot interpolating a character pattern having a predetermined dot matrix configuration in at least the main, scanning or sub-scanning direction, wherein the dot interpolation address in the main and scanning directions represented by the x and y components is generated. dot interpolation address generating means 31-49 for generating a sub-scan interpolation address represented by the x component and the y component, and the dot interpolation addresses generated by the dot interpolation address generating means. Dot interpolation generating means 58 for generating dot interpolation of coordinate points, area designation means 25 for dividing the dot interpolation information generated by the dot interpolation generating means with a slice width of a predetermined dot unit, and Means (10) for transmitting and controlling image data of the zone designated by the zone designation means, and the enlarged, rotated, or inclined shaped 볜 -shaped character is formed in a predetermined degree; Divided into zones above only the width dot interpolation device characterized in that the expansion image.

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