JP2884862B2 - Data processing device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a data processing apparatus for applying image processing such as smoothing processing to character data and graphic data and outputting the processed data to a printer engine or the like.

[0002]

2. Description of the Related Art FIG. 5 is a block diagram of a conventional data processing device 80. The data processing device 80 includes a CPU (central processing unit) 81, a main memory 82, a bit image font generator 83, a non-bit image font expansion processor 84, a character drawing processor 85, a graphic drawing controller 86, and a DMAC (direct memory Access controller) 87, drawing buffer memory 88,
And an image processor 89.

[0003] Character data and graphic data are sequentially transferred from a host machine (not shown).
Is stored in The character data includes a non-bit image font such as a bit image font and an outline font, and the character data is transferred as a code indicating them. The graphic data is transferred as raster data.

When the character data is a bit image font, a bit image font generator 83 generates a bit pattern, and the character drawing processor 85 writes the bit image data into a buffer memory 88.

If the character data is a non-bit image font, a bit pattern is generated by a non-bit image font developing processor 84, and the bit image data is written to a buffer memory 88 by a character drawing processor 85.

In the case of graphic data, bit image data is written into a buffer memory 88 by a graphic drawing controller 86. When the rendering process for one page of data is completed, the CPU 81 activates the DMAC 87 and the image processor 89. DMAC started
87 starts to transfer the contents of the buffer memory 88 to the image processor 89.

The image processor 89 performs various image processing such as smoothing processing, edge enhancement processing, contour extraction processing, enlargement or reduction processing on the transferred data as necessary, and outputs the data as video data to the printer. Output to engine etc.

[0008]

However, in the above-described conventional data processing apparatus 80, since all the data developed in the buffer memory 88 are image-processed by a single image processor 89, characters and graphics are not processed. , Image processing is performed uniformly without distinguishing As a result, image processing was not performed as expected, and the image was rather unclear in some cases.

That is, for example, an image M shown in FIG.
G1 is obtained by superimposing a letter CH of the alphabet "I" and an arcuate oblique figure GR, each of which is represented by a bit image (dot).

An image MG2 shown in FIG. 2B shows a desirable state as video data output from the data processing device 80. For the image processor 89, the image MG1 becomes the image MG2. It is expected to perform image processing.

However, actually, since image processing is performed on the image MG1 without distinguishing between the character CH and the graphic GR, these affect each other, and FIG.
As shown in the figure, a portion where the character CH and the graphic GR are extremely close to each other may be continuous, and may be far from the expected image MG2. Also, the same problem occurs in the case of characters.
there were.

[0012] The present invention has been made in view of the above-mentioned problems, superimposed
And its object is to provide a data processing apparatus capable of performing image processing without being affected by each other in between data.

[0013]

Means for Solving the Problems The apparatus according to the invention of claim 1, in order to solve the problems described above, draws the bit image data developed on the basis of a plurality of sentences <br/> character data entered In a data processing device that writes to a memory for writing and applies image processing to the bit image data read from the drawing memory and outputs it as video data, the drawing memory stores bit image data of a plurality of input character data in the drawing memory. Two buffer memories for individually writing are provided, and at least two image processing means are provided for performing image processing on the bit image data written in each of the buffer memories, respectively. And synthesizing means for synthesizing the video data output from the video camera.

[0014]

[Action] input multiple character data are, after being expanded into bit image data, stored its Resolution Re in different buffer memories, the data read from each buffer memory, by different image processing means Individual image processing is added.

The data to which the image processing has been individually applied are synthesized by synthesizing means such as an OR circuit and output as one video data.

[0016]

FIG. 1 is a block diagram showing a data processing apparatus 1 according to the present invention. In the data processing apparatus 1, the description of the matters described in the section of the related art and the matters known from the related art will be omitted or simplified.

The data processing device 1 includes a CPU 11, a main memory 12, a bit image font generator 13, a non-bit image font expansion processor 14, a character drawing processor 15, a graphic drawing controller 16, and a DMAC.
17, drawing first to third buffer memories 18 to 20,
It comprises first to third image processors 21 to 23, a synthesizing unit 24 and the like.

The main memory 12 stores at least one page of character data or graphic data transferred from the host machine HS. The bit image font generator 13 generates a bit pattern when the character data is a bit image font. When the character data is a non-bit image font, the non-bit image font developing processor 14 generates the bit pattern.

Based on the bit pattern generated by the bit image font generator 13 or the non-bit image font developing processor 14, the character drawing processor 15 stores the non-bit image in the first buffer memory 18 in the case of a bit image font. In the case of fonts, data is written to the respective predetermined positions in the second buffer memory 19.

The graphic drawing controller 16 develops graphic data into a bit image and writes the data into the third buffer memory 20. That is, according to the type of data stored in the main memory 12, the first to third buffer memories 18 to 20 are used to write respective bit images.
Is provided.

First to third image processors 21 to 23
Are for individually performing image processing on the bit image data BD1 to BD3 read from the first to third buffer memories 18 to 20, respectively. The contents of the image processing include smoothing processing, edge enhancement processing, contour extraction processing, enlargement or reduction processing, and the like, and are designated by the CPU 11 according to the type or state of each image.

The synthesizing section 24 includes video data VD1 to VD1 output from the first to third image processors 21 to 23.
Are ORed, and these are synthesized, and the video data V
Output as D0.

The CPU 11 controls the entire data processing device 1. In the data processing device 1, the CPU 1
1 and various elements are connected by various buses and control lines, but the block diagram in FIG. 1 does not always match the connection state.

Next, the processing operation of the data processing device 1 will be described. When one page of data is transferred from the host machine HS to the main memory 12, the data is developed into a bit image and the first to third buffer memories 18 are stored.
-20. As a result, of the data for one page, the bit image font is stored in the first buffer memory 18, the non-bit image font is stored in the buffer memory 19, the graphic data is stored in the buffer memory 20, and
Each is expanded and written.

When the rendering of one page of data is completed, the CPU 11 activates the DMAC 17 and the first to third image processors 21 to 23. D started
The MAC 17 stores the first to third buffer memories 1
The data BD1 to BD3 read from the data Nos. 8 to 20 are first to third data BD1 to BD3.
The data is transferred to the image processors 21 to 23.

First to third image processors 21 to 23
Corresponds to the CPU 11 for the transferred data BD1 to BD3.
Image processing of the content specified by
The data is output to the synthesizing unit 24 as video data VD1 to VD1 to VD3.

The synthesizing section 24 receives the input video data V
D1 to D3 are synthesized and output as video data VD0 to a print engine or the like. FIG. 3 is a diagram showing images MG3 to MG5 that have been subjected to image processing in the data processing device 1. FIG. 3A shows an image MG3 (video data VD1) obtained by processing the character CH of the image MG1 by the first image processor 21, and FIG. 3B shows a figure G of the image MG1.
8 shows an image MG4 (video data VD3) obtained by processing R by the third image processor 23. FIG.
(C) shows an image MG5 (video data VD0) in which the image MG3 and the image MG4 are combined by the combining unit 24.

As can be understood from these figures, the character C
By separately applying image processing to H and the graphic GR, image processing suitable for the properties of each data (image) can be performed, and mutual influence between these different types of data can be obtained. Image processing can be performed without receiving. As a result, the image MG5 becomes close to the expected image MG2, and the image quality of the video data VD0 output from the data processing device 1 can be improved.

In the above-described embodiment, three first to third buffer memories 18 to 20 and first to third image processors 21 to 23 are provided for three types of data. 2 for other data
One or four or more buffer memories and an image processor may be provided. For example, two buffer memories and an image processor may be provided for two types of character data and graphic data.

In the above-described embodiment, the first to third buffer memories 18 to 20 can divide a memory area of one memory element or use individual memory elements. In addition, the configuration of the data processing device 1 and the connections between the units can be variously changed in addition to the above.

[0031]

According to the present invention, it is possible to provide a data processing apparatus capable of performing image processing between data independent of each other without being affected by the superposition of the mutual data .

[Brief description of the drawings]

FIG. 1 is a block diagram showing a data processing device according to the present invention.

FIG. 2 is a diagram illustrating an example of an image before image processing and an expected image after image processing.

FIG. 3 is a diagram illustrating an example of an image that has been subjected to image processing in the data processing device.

FIG. 4 is a diagram showing an example of an image to which image processing has been added in the related art.

FIG. 5 is a block diagram showing a conventional data processing device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Data processing device 18 1st buffer memory (buffer memory) 19 2nd buffer memory (buffer memory) 20 3rd buffer memory (buffer memory) 21 1st image processing processor (image processing means) 22 2nd image processing processor (image Processing means) 23 third image processor (image processing means) 24 synthesizing unit (synthesizing means)

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) G06T 1/00-1/60 B41J 2/485-2/52 H04N 1/387

Claims (1)

(57) [Claims] 1. A write bit image data developed on the basis of a plurality of character data entered in the graphic memory, data to be output as video data in addition to image processing in the bit image data read from the graphic memory In the processing device, the drawing memory is provided with two buffer memories for individually writing bit image data of a plurality of input character data , and for the bit image data written in each of the buffer memories, A data processing apparatus, comprising: at least two image processing means for respectively performing image processing; and synthesizing means for synthesizing video data output from each of the image processing means.