JPS58178663A - Picture reproducing method and dot matrix table memory - Google Patents

Abstract

PURPOSE:To prevent generation of a void part in a boundary of a picture and a character, by constituting so that a shape representing dot pattern contains not only a figure dot showing a shape but also a background dot for constituting a part of a picture. CONSTITUTION:When reproducing a picture having a character, etc. fitted in a part of the picture, a picture data and a figure data are read from an original picture and an original of a character, etc., respectively. That is to say, as for an original picture 1, its density is measured at every picture element, and its density level data 10 is recorded in input files 11-13 of every three colors. On the other hand, as for a character original 2, a binary-coded density level data 16 is obtained by executing the color separation photometry by size of a cell of a dot matrix to be used, it is converted to a dot pattern number 17 prepared in advance, and is stored in an input file 18. The picture and the figure data stored in the files 11-13 and 18 are synthesized and stored in data files 19-21. A synthesized data is read out successively, and becomes a control signal for ink jet.

Description

[Detailed Description of the Invention] The present invention is directed to a method for re-agglomerating (recording or displaying) a piece of paper in which characters and figures are embedded in a part of the screen, and more particularly, a piece of paper with characters and figures embedded in a part of the screen. The current method has been improved so that no white areas are formed between the two, and the dot matrix table memory used in Kgl to implement this method.

In order to express iikigI with continuous halftones like a photograph, a high number of gradations per picture element is required. However, the commonly used iikIgI recording silver ml! The reality of display devices is that the number of gradations for pictures is small. Inkjet printing, which records one image by layering droplets on recording paper, uses a drop-on-demand inkjet head that allows you to change the size of the ink by partially changing the applied voltage. Even when using this method, it is possible to change the ink dot size between the minimum size of 150 .mu.m and the maximum size of 500 .mu.m by only about 16 steps and 81 degrees. In this way, floor 11&
When the lt ability is low, a dot matrix formed by arranging multiple cells vertically and horizontally, each containing one dot for each color, is defined as 〒Il&element, and the number, size, and number of dots existing in this dot matrix are calculated. A dot matrix method is used that expresses multiple levels of gradation by changing the dots and their positions. This dot pattern is
Since 1 representation is 1rlLI, the position of the dot and 1ik
It's not exactly the same shape as mine.

The above-mentioned dot matrix method places more emphasis on the level V* appearance than the resolution, but characters and figures (hereinafter simply referred to as characters) are given as multicolor character data separated by a certain color, and their outlines are For clarity, emphasis is placed on resolution.

Therefore, in order to represent a nine-image with a character inserted in a part in the th direction, the -image part can be represented by an nXm dot matrix, and the character part can be represented by one dot. However, using two picture elements differently in this way makes the device extremely complicated and is not practical.

As a general way to express characters, it is known to use a 1IilI dot pattern in which each cell of a dot matrix has a dot of the same size, but this method produces a staircase corresponding to the size of the dot matrix. Therefore, smooth contours cannot be expressed. This problem arises from the fact that characters are reproduced using the % dot pattern of the 9th dot pattern that expresses 1iii. In addition to the dot pattern, this problem can be solved by preparing a dot pattern that matches a part of the shape of the character. And when reading the image,
When creating picture book data consisting of a bit group indicating the density level of the picture element and a bit group indicating the discrimination between 11111g1 and the characters, and when reading the characters embedded in the image,
It is determined which shape display dot pattern the shape of the picture element corresponds to, and picture element data is formed which includes a bit group indicating the number of the corresponding pattern and a bit group identifying 11411m and a character. At the P+ time of the image, the dot matrix table memory that stores the dot pattern is referred to based on the pixel data, and 1lIk is added to the image part.
It is expressed using a dot pattern for IlII cost, and the character part is expressed using a dot pattern for shape expression.

When the two types of dot patterns mentioned above are used, the image portion is faithfully expressed in the shading of the original image, and the text portion is faithfully expressed in the original form. However, in the case of letters, the positions of dots are determined to match the shape, so there are cells in which no dots are placed in the picture elements of letters that are in contact with one letter, and these cells have no dots placed on them. The color appears and becomes [the white part]. If the background is white, no reading will occur, but if characters are embedded in a part of a color image, the white areas will stand out, leading to a deterioration in the quality of the characters.

One object of the present invention is to solve the above-mentioned drawbacks, and to provide an image reproduction method and a dot matrix table memory that can eliminate the 6-blank part that occurs at the boundary between a letter and a character. .

The gist of the present invention is that the shape-representing dot pattern includes not only figure dots representing the shape but also background dots constituting a part of the k-width.

Dot's own ability to express between floors is "O" (no dot)~r
If you have a range of NJ, the figure date
It is desirable that the number of sea breams can be changed between the dots and the background dots in the range of "0" to "N". The figure dot is
If the background dot is other than "θ", it is possible to express an outline character. In addition, when the background dot is rOJ and the figure dot is other than "0", if the background is white or a color containing an intermediate color.
Used to express myself.

If the density levels of figure dots and background dots could be viewed freely, a huge number of tables would be required. If the density or color of the background dots is close to my own, there will be no distortion, so please check the # of the background dots frequently.
It can be set to 8 levels: ``low concentration'' and ``medium concentration''. In this way, a dot matrix table is created (N11
) can be used.

The a11 degree level of the background dots is set according to the density level of 1iiiul extracted to fit the characters, and this can be determined when the image data and character data are combined. In addition, if you intentionally change the color of the background to the text because the combination of text and image colors is not pleasing in terms of color, you should adjust the density level of the background dots according to this new color. Yes.

Examples of the present invention will be described in detail below.

In FIG. 1, the symbol l indicates a color phoenix, and the symbol 2F
Indicates an i-character manuscript. This color original image l is scanned by a digital color scanner, and image data indicating the density level of the picture elements is read. On the other hand, figure data indicating the shape of the picture element is read in the character original horizontal 2. These ghost data and figure data are synthesized using a digital computer, and this synthesized data is input into an inkjet color printing device to create a reproduction, for example, by inserting red letters into the blue sky part of the color original 1. Draw -8. Image data and figure data are basically picture element data, but as mentioned above, they have different characteristics, so they will be used differently depending on the need.

Figure 2 shows the process of reading picture elements, and shows the rolling wheels 7 included in part 4 of color original 1 shown in Figure 1 and part 5 of character manuscript 2. Picture X8 is shown enlarged. Note that the orthogonal solid line and the point - are virtual lines indicating the area of the picture element. For color original-1, color separation photometry is performed for each II & Cu, and its am is measured. in fact,
The color original 1 is scanned using scanning light having a spot diameter of 16 squares, and the reflected light is photoelectrically converted and then coupled at a predetermined period. After this sampling, A-D conversion is performed to obtain 1III image data 10 indicating density levels from "01" to "68". The eight color densities of picture element 7 are, for example, yellow (Y)=88. Magenta (M) = IO.

Assume cyan (C)=25. This 1iIII data 10 is stored at predetermined addresses (Xn, Yn) of input files 11-18 provided for each of the eight colors.

On the other hand, the character original 2Fi is subjected to color separation photometry in nine sizes depending on the dot matrix cells used.

For example, when using an 8x8 dot matrix,
The concentration is measured in nine sizes divided by dotted lines. Therefore, when the scanning light beam used for scanning the color gland-1 is 15μ, the scanning light beam of 5μ is used for the text document 2. Note that, if scanning light of lbμ is used, the characters of copy-8 become a book whose height and width are reduced to 1/8 of 1 page.

When the characters are black, data 15 indicating the attitude level of each cell is obtained, which is converted into 2 fil using an excessive threshold level and transformed into data 16. in fact,
Specify the density of text original 2, convert it to 2@, and then store it in the input file. Then, data 16 is obtained by editing into a group of small matrices so as to correspond to picture element 8. Data 16Fi is a small matrix that exists in picture element 8 and corresponds to the shape of a part of the character b. For example, there are approximately 10 dot patterns that match part of the character shape, taking Mincho kanji as an example.
Of these, about 64 dot patterns have a high frequency of occurrence, and by combining these dot patterns, about 99 kanji can be expressed. In addition,
For shapes that do not match this dot pattern, a dot pattern similar to this is used.

Therefore, a dot pattern with a high frequency of appearance is prepared in advance, and a dot pattern 1 that matches the dot pattern 1 is selected and replaced with No. 11 to obtain character data 17. this is,
This can be realized by storing a high dot pattern of output 81sllIL, using nine table memories, and addressing with data 16.

&! Assuming that the figure data with a volume of 8 is "85", the obtained figure data 17 is stored at the address (Rm, 8m) of the input file 18.

Next, the ghost data in the input files 11-18 and the figure data in the input file 18 are read out, combined into images, and stored in nine data files 19-21 for each eight colors. This image-set synthesis replaces image data with figure data when the figure data is not "0" (no character) at a pre-designated pixel address (Xp, Yp) ta point.

FIG. 8 is a book showing the structure of tree data in 1.

Picture element data consists of 8 bits, and 256 tables can be referenced. Among these, the upper two bits are used to distinguish between characters and images, and to determine the all level of background dots placed in cells that are white areas.
Each of the remaining 6 bits selects one of the 64 tables. These upper two bits are assigned a binary code of "00" for IllIIgI, and for characters, the att of the image to be replaced when the character is created with the image.
Depending on the level, one of [OIJ, [IOJ, and ['llJ] is selected and attached. If the number of floors is up to l' OJ ~ 168, then if the a degree of 1iii* to be replaced and the bell is D, then
It can be found as follows.

O≦D<Dl → “ol” DI≦D<D2 → “1o” D2≦D≦68 → “ll” Here DI, D
2 are preset nine concentration levels.

FIG. 4 shows the structure of a dot matrix table referenced by ** data. The iji image data table is created individually for each color, taking into consideration the characteristics of the ink and the need to prevent color turbidity9 when mixing colors and to reduce the overlap of Fi color inks in the low to medium density range. determined. on the other hand,
The figure data table is commonly used regardless of color. If there is a 16th floor with dot Nl & level "0" to "16", in this dot matrix table, figure dot IlI [level "
15'' is used, and the white dots are placed in the area and represent part of the image, and the obscurity level is rOJ, ``4''.
", FIO" are used. In the above inequality, D1=1? , D2-42 are used. If the II tone of the background dots is 8 steps, 27 types of colors can be expressed by the combination K.

Since the figure dots express the color of the characters, 16 types are prepared with levels ranging from rOJ to [16]. When the color of this character is specified, the combination of the eight color figure dots and the @ degree bell is determined. Therefore, it is preferable to configure the figure data table in RAM, read the desired table from the floppy disk, and write it to the LAN. On the other hand, since the image data table does not need to be changed, it can be configured in a ROM.

FIG. 5 shows the relationship between the contents of the dot matrix table and the dot matrix. In the inkjet color printing device or dye thermal transfer drawing device of this embodiment, one side of the dot matrix 22 is 500 mm, and the recording The moving direction of the paper is the main scanning direction, which corresponds to inkjet printing.

Figure 6 (8) to (Cal) show the figure data table in detail, (AJ is a white background with no background dots, and ?, tB) is a figure with low density background dots. , (CI is of high concentration. This (B)
.

In fcl, the background dot #[level is indicated by X, Y,
The circles indicate figure dots. The dot matrix table in FIG. 4 is Xm4. It is assumed that Y=lO, and is represented by a circle with nine figure dots t-r l 5 J.

[Figure 7 shows 100 million reproductions. The picture element data stored in the data files 19 to 21 are sequentially drawn out. Generally, lineback memory is used,
It is read out for each scanning line and temporarily stored here. If the picture book data at address (Xn, Yn) is 28, the binary code of the upper 2 bits of this picture element data 28 is "OO", so the koji pickles in the dot matrix table memories 24 to 26 provided for each color are A data table is selected, one of the 64 tables is specified by the lower 6 bits, and dot matrix data 27 to 29 indicating the dot # and degree level are output. If D-A conversion is performed and, for example, eight inkjet heads provided for each color are driven, ink dots of nine sizes corresponding to the dot mem level will be recorded on the recording paper, resulting in a dot pattern of 80 to 82.
is obtained. When the toned patterns 80 to 82 of each color are recorded so as to overlap, a mixed color dot pattern 88 is formed, and the picture element 7 in FIG. 2 is reproduced.

Assuming that the pixel data at address (Xm, ym) is 85,
Since the upper two bits are a code indicating a character, the figure data table is selected from among the dot matrix table memories 24-26. If you want to use red as the text color, use the figure dot s.
The IJ rack table is selected, and this table has been written in the dot matrix table memories 24 to 26 in advance, so the Dot matrix data '86 to 88 are output by referring to the entire table of 7L. Dot patterns /89 to 41 are recorded by these dot matrix data 86 to 88, and when these are overlapped, a mixed color dot pattern 42 is obtained, as shown in FIG. Picture element 8 is reproduced.

In the dot putters 89 to 42, the background dots 48 are shown as triangles for convenience, and the figure dots 44 are shown as circles to remind a part of the shape of the letters in the area $8. This background dot 48 is adjacent to *
The color tone of the * picture element is similar and has become a friend. If there is no background dot 48, the background of the recording paper will appear in that cell and the base will become a part, so the present invention using the background dot 48 improves the quality of characters.

Although the above embodiments are intended to demonstrate reproduction of multicolor images such as inkjet drawings and thermal dye transfer drawings, the present invention can also be used for monochromatic reproduction.
The same is true for CRT graphic displays and the like.

[Brief explanation of the drawing]

Figure 1 is an explanatory diagram showing the composition of a color original image and text manuscript, Figure 2 is an explanatory diagram showing the picture element reading process, Figure 8 is an explanatory diagram showing the structure of picture element data, and Figure 4 is a dot matrix diagram. An explanatory diagram showing the structure of the table, Fig. 5 is an explanatory diagram showing the relationship between the answer of the table and the dot matrix, Fig. 6 is an explanatory diagram showing the figure data table in detail, and Fig. 7 is an explanatory diagram showing the picture element reproduction process. FIG. l...Color original 1Ik12...Text original 8...Reproduction i1!11 7.8...Picture elements 19-21...
・Data files 24 to 26・--Dot matrix table memory 2
7-29.86-88...Contest dot matrix data 80-82.89-41...Dot pattern 88.4
2...e Mixed color dot pattern 48...Background dot 44...Figure dot agent Patent attorney Figure 1■ 24 25 26 40 41 42 56 57 58

Claims (1)

[Scope of Claims] (1) In a method for reproducing an image in which a character exposure figure is embedded in a part of an 11111 surface using a dot matrix consisting of nXm cells as a picture element, the shape of the character/figure is The figure dots that make up the part, and the
lklF) Current method characterized in that a dot pattern mixed with background dots constituting a part of gl is used to represent picture elements of letters and figures that are in contact with gl. (2) When the am level at which no dot exists is set to "0" and the main level of the dot is set to rNJ, the density levels of the figure dots and background dots are set to "0" to "0".
Image F) Current method according to claim 1, characterized in that the image is set to an arbitrary value within the range of rNJ. (3) The density level of the figure dot is "0"
~ "N", the density level of the background dot is "0" for each density level. [Low #fj, r medium concentration] combination Sef'j 88111
(i6mN development method according to claim 1, characterized in that a D dot pattern 7 is prepared, and a predetermined dot pattern is selected according to the density level of the picture in which characters are replaced.) ) The dot pattern is formed in advance in a multi-layered pattern so as to match a part of the shape of the characters/figures.
1g of the patent claim characterized in that IIl is provided.
The method for developing an image according to any one of Items 1 to 8. (51) The dot butter/ is prepared for each of the 8# colors, and is characterized in that it reproduces color characters with intermediate colors - A method for lumping apricots according to any one of No. 1 IJ to No. 4 of the Patent Requested Scope (6J Dot matrix data indicating the am level of the dot placed in each cell of the dot matrix is stored, and in the dot matrix table memory, the pixel data is referred to as a memory address, the level -
1iki's data table for forming the dot pattern on the iron ingot. It is divided into a figure data table that forms a dot pattern that represents part of the shape of characters, solid objects, etc.
Furthermore, the figure data table is divided into multiple small tables, and these small tables contain information on the I/L level of figure dots that form part of characters and figures, and the level of background dots that do not form part of characters and figures. 1IIItA dot matrix table memory characterized in that dot matrix data of different levels are stored respectively. (7) Patent ii'il characterized in that the dot matrix table memory is provided for each of the three primary colors.
! Dot mark described in item 6 of the range of the button) IJ sock table memory. (8) The image data table is composed of a ROM,
Claim #! wherein the figure cheetah table is constituted by a RAM! Dot mark listed in either 6 or 7) IJ sock table memory. (9) The dot matrix table memory according to any one of the ranges 6 to 8]J1 of the I%tlfiw search, wherein each of the tables is selected using the upper few bits of the picture element data.