JPH0237391A - Image interpolating system - Google Patents

Abstract

PURPOSE:To form an image having a good quality by interpolating font data and rules lines between fonts by interpolating position information conforming to a font pitch designation and a line density designation. CONSTITUTION:In the case of transferring font data to a bit map display 9 through a bit map display control circuit 3, interpolating position information in the X direction and the Y direction which has been stored in memories 4, 6 is given to a bit copy control circuit 8. Subsequently, by a control of this bit copy control circuit 8, data extending from a part where a bit of the interpolating position has been set to a part where the next bit has been set is displayed. That is, data in which the bit of the interpolating position information has been set is copied. As for this interpolating position information, an appropriate binary sequence is selected by a pitch designation and a line density designation. In such a way, an image having a good quality can be displayed on the bit map display.

Description

[Detailed Description of the Invention] [Summary] Regarding an image interpolation method that connects spaces between fonts with line segments, image interpolation that forms high-quality images using control information that corresponds to changes in line density and font pinch. In an image processing system that inputs from an input device and outputs it to an output device via two image processing devices, font data, which is a set of bits corresponding to each bit of a bitmap display, is font data storage means for storing font data; font data selection means for selecting font data from the font data storage means according to a font designation signal; and control information 2 for determining whether to copy bits in the X direction of the displayed font. an X-direction interpolation position information storage means for storing control information on whether or not to copy Y-direction bits of the displayed font; and a Y-direction interpolation position information storage means for receiving a font pitch designation signal;
X-direction interpolation position series selection means for selecting control information corresponding to a specified font pitch from the X-direction interpolation position information storage means; Y-direction interpolation position information series selection means for selecting control information corresponding to specified line density; and a bitmap for controlling display of font data read from the font data storage means on a bitmap display device. A display control means, and a bit copy control means for controlling whether or not the bits of the font data are bit-copied in the X direction or the Y direction according to the information of each bit of the control information of the X direction or Y direction interpolation position information. The font data and between ruled lines between fonts are interpolated based on interpolation position information according to font pitch specification and line density specification.

[Industrial application field]

The present invention relates to an image processing system that outputs a binary image input from an input device to an output device via a processing device, and more particularly to an image interpolation method that connects blank spaces between fonts with line segments.

Recently, networking for image processing has become popular, such as inputting manually generated binary images (hereinafter simply referred to as images) from input devices such as scanners and facsimiles into a host computer, and outputting the images from output devices such as displays, printers, and facsimiles. It's progressing. In addition, each device tends to maintain various pixel densities in order to obtain clearer images, and each device has become capable of highly functional processing such as reducing and enlarging characters and other fonts. Ta0
In an image system that processes images, there is a one-to-one ratio between a bit in a bitmap memory and a pixel in a bitmap display.
In response to this, image processing is performed by changing the information on the bitmap memory. In such a system, when characters are developed using a font that is a collection of dot patterns, the size of the font or the spacing between fonts can be changed by specifying line density or pitch. At this time, in enlargement processing, etc., when a blank space is created between fonts, the number of dots is increased and the blank spaces are connected with line segments to interpolate between ruled lines.

[Conventional technology]

Conventionally, this type of image interpolation method between ruled lines includes one method of end dot copying, which repeatedly copies the first dot of the font, a vector method between ruled lines, which draws a vector between ruled lines, and
There are pattern recognition methods that recognize a dot pattern and fill in an interpolation pattern that matches the dot pattern.

FIG. 7 is an explanatory diagram of a conventional end dot copy method.

The figure on the left shows a case where the font width and character pitch are equal, and the figure on the right shows a case where the character pitch is thicker than the font width.In the case on the left, font A and Font B is in contact with font B, but on the right side, there is a blank space between font A and font B.

FIG. 7(a) shows the case of the solid line. In the case of a solid line as shown in FIG. 5A, the end of the solid line of font A is a black dot, and the space between font A and font B is filled with this black dot, so that the solid line becomes a solid line. However, in the case of the dotted line shown in FIG. 6B, the data on the rightmost ruled line of font A is a white dot, and this white dot connects the ruled lines. As shown in the figure on the right, as the character pitch becomes longer, the spaces between the fonts are filled with white dots.

Furthermore, in the case of FIG. 2C, since the terminal dot of phono L-A is a black dot, the spaces between the fonts are filled with black dots. Furthermore, in the same figure (d), there is a diagonal line, and the intersection of the ruled line of font A and the figure of the diagonal line is a black dot, and due to the change in character pitch, the ruled lines are connected by black dots. .

FIG. 8 is an explanatory diagram showing the expansion of font data itself when the character pitch is made larger than the font width.

In FIG. 5A, the font data shows dotted lines running in the horizontal direction, and even if the number of black dots in each dotted line is increased, the graphics will not be disturbed in response to the enlargement of the character pitch. However, in the case of FIG. 6B, since the font data has black dots running in the vertical direction, the vertical data line becomes thicker by the magnification factor of increasing the character pitch number.

[Problem to be solved by the invention]

In this way, in the conventional end dot copy method, the space between ruled lines is filled in such a way that if the end dot of the font data is 1, it becomes all black, and if it is 0, it becomes all white. A problem arose in that the quality was degraded. In addition, in the conventional line-to-line vector method, font data comes in character codes, so it is necessary to have firmware for each code in advance, which not only increases the amount of data but also causes problems such as the user not being able to change patterns. be. Furthermore, the conventional dot pattern recognition method requires a lot of time for firmware processing, resulting in an impractically complex process.

An object of the present invention is to form high-quality images using control information corresponding to changes in line density and font pitch.

[Means to solve the problem]

FIG. 1 is a block diagram of the present invention.

The present invention provides an image processing system that outputs a binary image input from an input device to an output device via a processing device.
The font data storage means 1 stores font data which is a set of bits corresponding to each bit of the bitmap display, and the font data selection means 2 selects the font data storage means 1 according to a font designation signal.
The X-direction interpolation position information storage means 4 stores control information on whether to copy the X-direction bits of each font displayed on the bitmap display, and the Y-direction interpolation position information. The storage means 6 stores control information on whether to copy bits in the Y direction of the displayed font, and the X direction interpolation position series selection means 5 receives the font pitch designation signal and selects the X direction interpolation position information. The Y-direction interpolation position information series selection means 7, which selects control information corresponding to the designated font pitch from the storage means 4, receives the line density designation signal;
The bit map display control means 3, which selects control information corresponding to the specified line density designation from the Y-direction interpolation position information interpolation storage means 6, converts the font data read from the photo data storage means 1 into bits. Bit copy control means 8, which executes control to display on a map display device, copies bits of the font data in the X direction or Y direction according to each bit of the control information of the X direction or Y direction interpolation position information. This invention controls whether or not to copy, and is configured to interpolate between font data and ruled lines between adjacent fonts using interpolation position information according to font pitch specification and line density specification.

[For production]

In the present invention, bits of interpolation position information are added to the outside of the normal two-dimensional body face surrounding each font, and each bit in the X direction and Y direction of each font is determined by the presence or absence of a binary series bit of this control information. Controls whether or not to copy bits for , and performs interpolation processing appropriately.

〔Example〕

Next, embodiments of the present invention will be described with reference to the drawings.

FIG. 2 is a data structure diagram of extended font data with interpolation position information according to the present invention. In the present invention, each font is surrounded by two
Bits of interpolation position information are added to the outside of the dimensional body face 10 to form extended font data. here,
The interpolated position information data stored in the column direction will be referred to as Y-direction interpolated position information 11, and the data stored in the row direction will be referred to as X-direction interpolated position information 12.13. The Y-direction interpolated position information 11 and the X-direction interpolated position information 12, 13 consist of a plurality of columns or a plurality of rows depending on the interpolation method, and each binary series differs depending on the given font, line density, and pitch.

For example, for a 2400 PI and 9 point font, two types of line densities, 6LPI and 8LPI, and three types of character pitches, 5 CP I, 20/3 CP I, and 8 CP I, can be specified. Here, the symbol DPI stands for dots/inch, LPI stands for lines/inch, and CPI stands for characters/inch.

Since the Y-direction interpolation position information 11 is a binary series that differs depending on the row density, there is Y-direction interpolation position information corresponding to 6LPI and Y-direction interpolation position information corresponding to 8LPI. Furthermore, since the X-direction interpolated position information 12.13 differs depending on the number of characters per inch, there are three types: one for 5CPI, one for 20/3 CPI, and one for BCPI.

For example, the Y-direction interpolated position information 11 in FIG. 3 is a binary series corresponding to 6LPI, and the X-direction interpolated position information 12.1
3 is for 20/a CP I, and the second X-direction interpolated position information 13 is a binary series for 5 CPI.

When converting the line density of a 240DPI, 9 point font in the body face to 6LPI, first, only the inside of the body face 10 is taken out from the memory containing the font data, and expanded onto the actual bitmap memory. At this time, according to the present invention, data in the vertical direction is developed in such a way that only lines where bits are set are copied while referring to the Y-direction interpolation position information 11 for 6LPI. Similarly, in the horizontal direction, for example, when expanding for 5 CPI, that is, 5 characters per inch, the second X-direction interpolation position information 13 is used to determine the column where the bit is It is expanded in such a way that only the bits are copied.

FIG. 3 is an explanatory diagram showing the processing process of the present invention. In other words, the font data when the font width and the number of character pitches are equal and the font height is equal to the line density is taken and output ((a) in the same figure), and the X-direction interpolation position stored outside the body face IO is The process of developing using the information 12.13 and the Y-direction interpolated position information 11 ((b) in the same figure,
(C)) is shown. The result is shown in the same figure (C), and a good quality image is obtained. For example, if the line density is 6LPI, read each bit of the Y-direction interpolation position information 11 in Figure 3(a), and use that bit to control whether or not to copy inside each body face including the font. . For example, according to the Y-direction interpolation position information 11 in FIG. 3(a), for copy operations, there are no copies, no copies, no copies, copies, copies, no copies, copies, etc.
・Copy or not copy. Furthermore, if 5CPI is followed in the row direction, the presence or absence of copying is determined according to the X-direction interpolation position information 13 on the lower side of FIG.
Don't copy, copy, copy, don't copy...don't copy, copy.

By repeating this copying operation, a font corresponding to the specified line density of 6LPI and character pitch of 5CPI is applied to each body face, and the result is as shown in Figure 3 (C), and this enlarged figure results in a high quality image.

Next, FIG. 4 is a functional block diagram of the image interpolation method of the present invention. In step 14 of FIG. 4(a), one character code is read, and in step 15 it is determined whether or not it is a character code that requires interpolation processing. If not, a bit mover (BMV) is used. to expand the dot corresponding to this character code on the bitmap display. In step 15, if the character code is to be interpolated, step 16 first performs interpolation processing in the X direction, then moves to step 17, performs interpolation processing in the Y direction, and displays the bitmap display Expand to.

Here, the interpolation process in the X direction in step 16 is shown in Fig. 4 Φ)
In step 19 of this X-direction interpolation processing flow according to the operation shown in FIG.

For example, if the character pitch is 5 CPI, the second X-direction interpolation position information 13 shown in FIG. 3(a) is sent to the buffer. Sets the start address and destination address on the bitmap display for the specified character code, and fixes the length in the Y direction. Note that here, since the interpolation process by the focus mover (BMV) is performed by rectangular movement in bit units, the information set in the bit mover is based on the start address (X
.

Y) and length (ΔX, ΔY) and the start address (X, Y) and length (ΔX, ΔY) of destination D.
ΔY).

FIG. 4(C) is an explanatory diagram of rectangular movement by the bit mover used in the present invention. In the figure, 28 is a binary series of X-direction interpolated position information, and it is assumed that the black areas are 1 and the white areas are 0. Reference numeral 21 denotes an area for font data developed on the bitmap display. 30 and 31 are partial areas of the font data 29, which are rectangular areas that are copied to areas 32 and 33, respectively, according to the interpolation process of the present invention. Each rectangular area 30 and 3
1 is determined as a rectangle in the first place by giving the addresses of the upper left corner point and the lower right corner point. Now, let the address of the left corner point before copying be the source address S, and the address of the left corner of the rectangle 32 after copying be the destination address D. When performing interpolation processing according to the present invention, when the source address S is changed to the destination address D, the rectangle changes in the row direction depending on the X-direction interpolation position information. For example, if the X-direction interpolation position information is as shown in 28, rectangle 30 is copied as is to 32. However, the rectangle 31 is copied so that the horizontal length is equal to the length from the roe to the next roe in the row interpolation position information 28.

Therefore, the common area 34 is displayed double between the rectangles 32 and 33. That is, the image information of the last column of rectangle 32 and the first column of rectangle 33 are the same. This is the copy operation of the present invention. In the case of rectangular movement using a bit mover, the start address of S and the start address of destination address D are required to change the rectangle's start address S to destination address D. In the present invention, the length and width of the rectangle before copying are different from the length and width of the rectangle after copying. Therefore, in the present invention, the start address and length for the source S and the start address and length for the destination address D are set in the bit mover.

Therefore, in the present invention, the address is counted up in steps 21 and 22, and at the same time, each bit of the X-direction interpolation position information is read one by one.

Then, it is read in step 21 whether the bit is 1 or 0, and this is repeated until the next 1 appears. If the location of the next bit W is confirmed in step 22, then in step 23, the X-direction length ΔX up to where that bit is set is set in the buffer as the address count number. Then, in step 24, the bit mover (BMV) is started, and at the same time, the related part of the character pattern stored in the memory is moved to the work memory. , set the destination address to the address next to the current address, set the start address to the current address, and
Start the MV. The process moves to step 27, and if the process is not completed, the process moves to step 21, and an operation begins to search for the next 1 information bit in the same row. Such repetition is repeated until the line in the font ends, that is, until the reading operation of one X-direction interpolation information is finished, and after that, the same process is performed for the next line. In this case, moving to the next row is the Y-direction interpolation process. When moving from row to row, Y-direction interpolated position information is used instead of X-direction interpolated position information. That is, in the Y-direction interpolation process as well, the Y-direction interpolation position information is sent to the buffer, the start address and destination address of the bit mover (BMV) are set, and the next focus 1 of the Y-direction interpolation position information is detected. After detection, the length in the Y direction up to the point where the bit is set is set in the buffer as the address counter number, and the bit mover is activated. At the same time, the relevant part of the character pattern is moved from the storage memory to the work memory. Furthermore, the address next to the current address is set as the destination address, and the start address is set to the current address and copied.

And then repeat this.

In the present invention, when font data is transferred to a bitmap display via a bitmap display control circuit, interpolation position information in the X direction and Y direction stored in the memory is provided to the bit copy control circuit. Under the control of this bit copy control circuit, the data from the position where the bit of the interpolation position information is set to the position where the next bit is set is displayed. That is, in the present invention, data in which the interpolation position information bit is set is copied. Since an appropriate binary series is selected for this interpolation position information based on pitch designation and line density designation, the resulting font image is of extremely high quality.

FIG. 5 is a block diagram of a system including the functional parts of the present invention shown in FIG. In the figure, 34 is a host computer, 35 is a controller, 36, 37, and 38 are a system control section, a mesoyer conversion section, and a mechanical controller included in the controller, 39 is a file for storing character code data, and 40 is a bit map. An output device such as a display or printer on which data is displayed. The present invention belongs to the mezzoyer conversion section 37 of the controller 35.

FIG. 6 is a functional block diagram of the Mezoyer transform unit 37 including the functional units of the present invention. In the figure, 41 is an interface with the system control unit 36; a communication controller;
42 is a system bus, 43 is a control storage,
44 is a bit mover, 45 is an image bus, 46 is a character pattern storage memory, and 47 is a bitmap memory for expansion.

Inside the character pattern storage memory 46, there is a font data storage means 1 shown in FIG. 1, interpolation position information storage means 4 and 6 in the X and Y directions, a decoder 2 for selecting font data, and interpolation positions in the X and Y directions. A decoder 5.7 for selecting an information sequence is included. Character pattern storage memory 46
The font data or interpolation position information read from the image bus 45 is loaded onto the image bus 45, the font data is transformed according to the bit copy control of the present invention, and the resulting font data is written into the expansion bit memory 47. The operation of the present invention is performed via the control storage 43 and the focus mover 43, and their functional operations are controlled via the system control unit 36, communication controller 41, and system bus 42.

〔Effect of the invention〕

By adding position information to be interpolated to font data, the present invention can display fonts that correspond to various line density specifications or Pisochi specifications, and as a result, extremely high-quality images can be displayed on a bitmap display. It becomes possible to do so. Moreover, since display conversion of font data is executed by simultaneously reading interpolation position information when reading font data from memory, the processing becomes extremely fast.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of the present invention. FIG. 2 is a data structure diagram of extended font data with interpolated position information of the present invention. FIG. 3 (a), (b), and (C) are diagrams of the present invention. An explanatory diagram showing the processing process. FIGS. 4(a), (b), and (C) are functional block diagrams of the image interpolation method of the present invention. FIG. 5 is a functional part of the present invention shown in FIG. FIG. 6 is a functional block diagram of the mezzoyer converter 37 including the functional unit of the present invention. FIGS. Figures a) and (b) are explanatory diagrams of a conventional method showing the expansion of font data itself when the character pitch is made larger than the font width. ■... Font data storage means, 2... Font data selection means, 3... Bit map display control means, X direction interpolation position information storage means, Y direction interpolation position information series selection means, Y direction interpolation position information storage means, Y-direction interpolation position information series selection means, bit copy control means, and bitmap display.

Claims (1)

[Claims] In an image processing system that outputs a binary image input from an input device to an output device via a processing device, font data that is a set of bits corresponding to each bit of a bitmap display (9) is provided. font data storage means (1) for storing; font data selection means (2) for selecting font data from the font data storage means (1) according to a font designation signal; and copying bits in the X direction of the displayed font. X-direction interpolation position information storage means (4) for storing control information on whether to copy the Y-direction bits of the displayed font; and Y-direction interpolation position information storage means (6) for storing control information on whether to copy the Y-direction bits of the displayed font. and X-direction interpolation position series selection means () which receives the font pitch designation signal and selects control information corresponding to the designated font pitch from the X-direction interpolation position information storage means (4).
5); Y-direction interpolation position information series selection means (7) for receiving the row density designation signal and selecting control information corresponding to the specified row density designation from the Y-direction interpolation position information storage means (6); bitmap display control means (3) for executing control for displaying font data read from the font data storage means (1) on a bitmap display device (9); and the interpolation position in the X or Y direction. and a bit copy control means (8) for controlling whether or not the bits of the font data are bit-copied in the X direction or the Y direction according to the information of each bit of information control information, and according to the font pitch designation and the line density designation. An image interpolation method characterized by interpolating between font data and ruled lines between fonts using interpolation position information.