KR900004892B1 - Dot inter polation 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 pitch along the main scanning direction, and still another pair of registers designates 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 corresponding registers. Dot interpolation of a character pattern is performed by main scanning and subscanning in accordance with the contents of the respective registers.

Description

Dot interpolator

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

2 is a block diagram showing the configuration of main parts of an embodiment of the present invention.

FIG. 3 is a diagram for explaining the operation of the above embodiment, and FIGS. 3A to 3 (f) show dot information (dot pattern) of one grid and four points each surrounding a new dot generated by dot interpolation processing. Showing the relationship between the interpolation level set in the interpolation table ROM and the table type.

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

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

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

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

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

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

FIG. 10 is a view showing an example of development of an underline for various modified characters. FIG.

11 is a view for explaining the means for distinguishing a zone.

* Explanation of symbols for main parts of the drawings

10: CUP 11: Main memory (MM)

12 CP'U 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

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

The present invention relates to a dot interpolation apparatus used for a document creation 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 structure, such as a document creating device, when the character font having a prescribed dot matrix structure is provided to be enlarged and reduced at a certain magnification, it is conventionally described with reference to FIGS. As shown in the figure, the so-called simple enlargement and reduction method of simply increasing or deleting dots in the original pattern pattern SD ... is employed.

Such conventional enlargement / reduction means can be realized relatively simply and inexpensively. For example, the pattern of the output pattern is deformed from the original character to be expressed, for example, the connecting portion of the formation on the stairs in the diagonal line is prominent. There was a flaw in the unnatural character expression that was difficult to recognize.

In addition, in the conventional dot interpolation means as described above, it is not easy to obtain the original character pattern or the deformed character in which the character pattern having an arbitrary magnification and magnification is inclined or rotated at an arbitrary angle, In addition, even if the deformation range is largely restricted, deformation occurs in the converted character pattern, and the accuracy of the conversion is greatly reduced, resulting in a defect in which pattern conversion with high fidelity cannot be performed.

The present invention has been studied in consideration of the above-described situation and can be enlarged and reduced while maintaining a high character quality at any magnification with a relatively simple configuration, and at the same time faithfully without any distortion with any inclination. It is an object of the present invention to provide a dot interpolation device that can rotate and incline, and that each type of pattern conversion such as enlargement / reduction, rotation, and inclination of characters can be made at high speed by a high-precision dot interpolation process. .

The present invention provides a dot interpolation apparatus for dot interpolating a character pattern having a predetermined dot matrix configuration in at least the main scanning direction or the sub scanning direction, wherein the dot indentation width of a pair of register main scanning directions for specifying the initial address of the interpolation dot is specified. A pair of registers, a pair of registers for specifying dot engraving widths in the sub-scanning direction, each of the x and y components each of which selectively contains specific trigonometric function data according to the rotation angle or tilt angle specified in each register The data is set in pairs and dot interpolation such as rotation character, oblique character, etc. according to the designated angle is performed by the main and sub-scans according to the contents of each register. With arbitrary magnification and scaling factor, you can zoom in and out without compromising high character quality. At the same time, any character can be rotated and inclined faithfully without any distortion with any inclination, and each type of pattern conversion, such as enlargement, reduction, rotation, and inclination, can be executed at high speed by high-precision dot interpolation. have.

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), search number 15 denotes a serial / parallel conversion circuit, reference numeral 16 denotes a CRT display, and reference numerals. 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 sub-scan direction (interval and scan interval x number of times) after conversion during 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 is 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) according to a specified angle in the case of oblique rotation of characters, etc. Reference numeral 25 exceeds the reference character height in pattern conversion. A character pattern after one conversion process is an area designation register for classifying areas by the reference character height. Reference numerals 26 and 27 are registers for storing dot notation widths (dx, dy) according to the enlargement 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 constitute components for generating dot interpolation addresses, respectively, and reference numeral 31 denotes a register for storing dot writing width DX1 in the sub-scanning direction including x components. And reference numeral 32 denotes a register for storing dot indentation width DX2 in the scanning and scanning direction including the x component, and reference numeral 33 denotes the initial value of the scanning and scanning direction incorporating the x component (initial address: X1). init). Reference numeral 34 denotes a register for storing dot-indentation width DY1 in the sub-scanning direction containing the y component, and reference numeral 35 denotes a dot-indentation width DY2 in the sub-scanning direction including the y component. The register to be stored and reference numeral 36 are registers for storing the 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. Is a register for storing the new dot address at the time of dot interpolation represented by the integer part and the fractional part including the x component selected by the data selector 41, and the reference number 43 is the start of the scanning and scanning. A data selector which selects the contents of the register 42, and then selects the output of the addition circuit 38 for every one-dot interpolation process; the creation number 44 includes the x component selected by the data selector 43; This register stores 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 a subsequent scan / scan is performed. And reference numeral 46 denotes a register for storing a new dot address at the time of dot interpolation represented by an integer part and a decimal part including the y component selected by the data selector 45, and reference numeral 47 denotes when starting and scanning. A data selector which 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 thereafter, and the reference numeral 48 denotes the y component selected by the data selector 47. Is a register that stores 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 that surrounds a new dot 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 a 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 by 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 the area surrounded by the four points of dot information by using the 1-bit interpolation value switching selection signal output from the input information as input information. Here, a mask ROM of 256K bits (32Kx8 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 value stored in the register 50. When the interpolation value exceeds the comparison value, that is, the threshold value, Outputs a signal of "1" level to be displayed. 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.

3A to 3F show the dot information (dot pattern) of one grid and four points surrounding each new dot generated by the interpolation process, 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"). 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), a specific dot Da of the lattice of the caution is noted. 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 speed 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 a new dot located in the dot region of four points is determined by the dot state around the high point again 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 (a) shows a stagnation (or a long or flat body). ), (B) shows an inclined body, (c) shows a bottom-order inclined body, and (d) shows a rotating body, respectively.

6A and 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 / scan direction and the sub / scan direction are inverted.

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 underline for each type of deformed character.

11 is a view for explaining the zone setting 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 enlargement / reduction ratio. Calculate the dot indentation width (dx, dy: inverse of magnification / reduced magnification) and set it in the registers 26 and 27, and in case of rotation or inclination, the trigonometric function data (sin , cos, tan) are set in the triangular coin table 24.

Then, the initial values (initial value addresses: X1 init, Y1 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. Indentation widths DX1, DY1, DX2, and DY2 are calculated, and their data are set in the registers 31 to 36, and at the same time, the character height and character width caused by the pattern conversion such as enlargement rotation and the like are changed. The data of the V size and the H size are calculated and set in the registers 21 and 22, and when the zones are divided, the number of zones is calculated and this data is set in the register 25. Also, when the dot interpolated character is moved within the range of 1 to 7 dots at the time of its output (for example, when printing out the interpolated ruby ruby character (small letter) and half-width character, etc. 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 output, and the byte boundary on the image memory side is not increased. When it is necessary to match the (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 the same identity (or long body, flat body) as shown in FIG. 5A (for example, simple drawing / reduction). In this dot interpolation, the register 31 has a dot writing width "dx" in the register 32, the initial value "sx" in the main and scanning directions sm in the register 33, and a dot in the register 34. FIG. 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 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 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. 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.

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 meaningless " 0 " dots.

Data to be the initial addresses stored in the registers 33 and 36 under the control of the selection control circuit 49 after the data to the registers 31 to 36 and the interpolation target character pattern to the single character buffer 52 are finished. (Sx, Sy) are selected by the data selectors 41, 45 and stored in the corresponding registers 42.46, respectively. At the start of 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 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 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. In the reducer (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 and four points output from the bit select circuit 53 is recognized by the dot pattern recognition unit DSP and is a specific dot pattern as shown in FIG. Recognizes an on / off state and outputs a 1-bit interpolation value switching selection signal corresponding to the dot state. In other words. For example, as shown in FIG. 4, when only one of four surrounding dots D0, D1, D2, and D3 is off, that is, "0" (D0 in the figure), the lattice around the grid Recognizes the on / off state of the specific dots Da and Db, and if Da, Db = " 1 ", selects the co-owner type table T1 as shown in FIG. 3d, and at least one of Da and Ub. If " 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, Ub), and Da, Ub = " 0 " selects the co-owner type table T1 as shown in FIG. 3a, and at least either of Da and Uh 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 region of four points is again determined by the dot state around the dots 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 5B, which means 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 the 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 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 engraving width in the main scanning direction, the dot writing width dx corresponding to the designated enlargement and reduction ratio is set in the register 32, and the register 35 is stagnant (or Since dot interpolation is set as above, the content (dot address) of the register 44 has a dot indentation width (dx) in accordance with the enlargement and reduction ratio specified for each dot interpolation process. Although updated sequentially, the contents of the register 48 are not updated as a result, and the data at the initial setting is retained. 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. The contents of the register 46 and the contents of the register 34 are also added. Is added by the addition circuit 38, 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 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 the dot interpolation of a long body and a flat body, the content (dot address) of the register 46 is the dot indentation width (depending on the magnification / reduction ratio specified each time a main scan or a scan 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 manner, 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 58 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 into the line buffer 18 of the printing control unit 17 for printout, for example, 1 is written to the offset register 28. When an offset value within the range of 7 to 7 dots is set (e.g., when the dot interpolated ruby ruby character is moved below i (i = 1, 2 ... 7) dot at the time of printout), or a pattern The number of dots in the scanned / scanned direction of the converted characters 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 offset value i is set or the like, the offset data generation unit 28 generates offset data (i " 0 " s) in accordance with the offset value i of the offset register 28. Note: Shift Regis Prior to Initiation of Injection After the data is set in the data recorder 60, the data interpolated subsequently, that is, the converted character pattern is written.

The above operation was a case where a stagnant (or long body or a plain) object was used as an output target. For example, when the dot interpolation address is generated when a rotating body is used as an 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 [θ0], 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], the register 31 ), DY1 = dy.cos θ0 is set in the register DX1 = -dx.sin θ0 in the register 32, and DY2 = dy.sin θ0 in the register 35 in the DY1 = dy.cos θ0 register.

In the registers 33 and X1 init and 36 and Y1 init, (1) X1 init = 1/2 a-1 / 2 (a + 1-dx) when 0 ° ≤θ ° ≤90 ° cos 2θ0 Y1 init = -1 / 2 (1-dy) -1/2 (a + 1-dx) dy / dx sin 2θ0

(2) When 90 ° ≤θ0≤180 ° X1 init = a + 1/2 (1-dx) -1/2 (b + 1-dy) dx / dy sin 2θ0 Y1 init = 1 / 2b + 1 / 2 (h + 1-dy) corm 20θ0

(3) When 180 ° ≤θ0≤270 ° X1 init = 1 / 2a + 1/2 (a + 1-dx) cos 2θ0 Y1 init = b + 1/2 (1-dy) +1/2 (a + 1-dx) dy / dx sin 2θ 0

(4) When 270 ° ≤θ0≤360 ° X1 init = 1/2 (1-dx) +1/2 (b + 1-dy) dx / dy sin 2θ0 Y1 init = 1/2 bl / 2 (b + 1dy) sets cos 2θ0 respectively.

As described above, each set value (DX1, DX2, DY1, DY2, X1, init, Y1 init), such as dot indentation width and initial address, which includes trigonometric function data, is corresponding to the rotation angle θ0. After setting in the registers 31 to 36, a dot interpolation address generation process for the main / scan direction and the sub-scan direction as described above is executed in order to obtain a rotation character pattern dot according to the designated value? 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 corresponding to the specific register example designation inclination angle in the registers 31 to 36 is specified. Data including data as one element is set.

That is, if the designated inclination angle is &quot; θ0 &quot;, 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 [h + 1], θ ° <θ0 < In the range of 90 °, the register 31 has DX1 = dx. In the tan θ0 register 32, DY2 = dx2 is set in the DYI = dy register 35 in the DX2 = dx register 34, respectively. In the register 33, X1 init1 / 2 (1-dx)-(h + 1-dy) dx / dy tan θ0 and Y36 init = -1 / 2 (1-dy) are set in the register 36, respectively. do.

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 inclination angle θ0, is calculated, respectively. After setting to (31) to (36), italic-pattern pattern dots inclined according to the designated angle (θ0) are obtained by sequentially performing dot interpolation address generation processing for the main / scanning direction and the sub-scanning direction as described above. Can be.

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 θ0, 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. This 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 (e.g., vertical 8x3 = 24 dots) 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 character converted by the CPU 10 to which the newly generated character pattern is divided into tentacle zones at the time of initial setting of the register is designated based on the angle, magnification, reduction factor, etc. of the character. The data of the register 25 is decreased (-1) each time a pattern is written in units of zones 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 spacing) between the patterns. An example of the zone division at this time is shown in FIG.

As shown in Figs. 7 and 8, 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, inclination angle, enlargement, reduction ratio, and the like. 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 setting of the register described above. It can be easily recognized by releasing it. That is, for a character converted at an angle, the writing (handling) of the character is performed based on an area of a rectangle on a horizontal vertical line circumscribed to 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 "24" of the line buffer 18, and at the time of dot interpolation processing at display output. By dividing the V size data stored in the register 21 by the bit width "24" of 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.

In addition. The data of V size and H size described above is also referred to when setting the character pitch and when processing the underline / radiation. That is, the molecules such as tilt and rotation obtained by dot interpolation having an arbitrary tilt angle in the scanning direction as described above have the height (character height) and the 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 outputted in the normal row and column directions (x and y directions), the character pitch or the underline / radiation cannot be determined as the existing fixed parameter designation section.

Therefore, the above-mentioned circumscribed rectangles are 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 one-dot dot image is to be output, for example, each time it is developed (written) in the line buffer 18 in the print control unit 17. It is determined whether or not the contents V size of the CPU 10 register 21 are 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 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.

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), but simply determines the pitch based on the value of the register 21 (or register 22) at that time in order to simplify the processing. You may take control means.

Next, the operation | movement at the time of outputting underline / radiation based on said circumscribed rectangle is demonstrated. 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 disembarkation / radiation control unit 23 installed in the printing control unit 17 draws a lot of discharging or discharging lots on the line buffer 18 according to the instruction of disembarkation / radiation included in the printing control information input through the CPU bus 12. However, it is not possible to respond to the deformed characters such as rotation and italic type as described above with the line expansion by the normal character width. Therefore, if the contents (V size) of the register 21 are always inputted, and there is a notice of underline / radiation, a dot pattern of underline / radiation is generated with the line length corresponding to the contents of the update data of the register 21 at that time, and the line buffer The pattern is developed in correspondence with the character on (18). FIG. 10 shows an example of development of underlines for various modified characters at this time.

As described above, according to the present invention, in a dot 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, a pair of registers specifying initial addresses of the interpolation dots. , A pair of registers specifying the dot-indentation widths in the main and scanning directions, and a pair of registers specifying the dot-indentation widths in the sub-scanning directions, and a specific three according to the rotation angle or tilt angle specified in each of these registers. Set the data of x component and y component which contains each function data selectively in pairs, and the dot, such as rotation, oblique character, etc. By setting the interpolation, a relatively simple configuration makes any character have an arbitrary scaling factor and high character quality. It is possible to zoom in and out without damaging the letter, and to rotate and slant any letter without distortion with any inclination. The dot interpolation can be executed at high speed by precision.

Claims (1)

In a dot 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, the initial value and the dot indentation width in the main / scanning direction based on the information of the x, y component and the angular component. First calculating means for calculating a value, first storage means 33 for storing an initial value of the scanning / scanning direction calculated by the first calculating means, and a note calculated by the first calculating means. Second storage means (32,35) for storing dot engraving widths in the scanning direction, third storage means (44,48) for storing dot position information in the main / scanning direction, and the first After the information stored in the storage means is initially set in the third storage means, the dot positions in the main and scanning directions are calculated and stored in the third storage means based on the contents of the second and third storage means. The second calculation means 38, 40, and the information of the x, y components and the angular components. Third calculating means for calculating the initial value and dot indentation width in the sub-scanning direction, the fourth storage means 36 for storing the initial value in the sub-scanning direction calculated by the third calculating means, Fifth storage means (31,34) for storing dot indentation widths in the sub-scanning direction calculated by the third calculating means, and sixth storage means for storing dot position information in the sub-scanning direction. (42,46) and information stored in the fourth storage means are initially set in the sixth storage means, and then dot positions in the sub-scanning direction are calculated based on the contents of the fifth and sixth storage means. And fourth computing means (37, 39) for storing in the sixth memory means, and converting the pattern of the inclined characters or rotating characters according to the respective dot position information stored in the third and sixth memory means. A dot interpolation apparatus characterized by executing a process.

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