JP3225658B2 - Image information 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 an image information processing apparatus, and more particularly to an image information processing apparatus capable of enlarging low linear density image information at an arbitrary magnification in a main scanning direction and a sub scanning direction and recording and outputting the information at a high linear density. The present invention relates to an image information processing apparatus capable of being used.

[0002]

2. Description of the Related Art At present, a G3 standard facsimile apparatus generally used is 8 pixels / mm × 3.85 lines / mm (standard) and 8 pixels / mm × 7.7.
Two resolutions of line / mm (high resolution) are used.

On the other hand, recent facsimile apparatuses have appeared with higher resolution and higher line density.
For example, in a G3 facsimile apparatus, 16 pixels / mm ×
There are 15.4 lines / mm, and the G4 facsimile machine has 200 dpi, 240 dpi, and 300 dpi.
And 400 dpi.

Conventionally, such a facsimile apparatus having a plurality of resolutions is provided with a higher-resolution recording device. When recording image information having a resolution lower than the resolution, the image information is enlarged and recorded. Like that. This is because if low-resolution image information is directly recorded by a high-resolution recording device without being enlarged, the image is reduced and recorded.

For example, 8 pixels / mm × 3.85 lines /
When image information sent at a resolution of mm (standard) is recorded by a recording device of 400 dpi, the main scanning direction is reduced to about 1/2 and the sub-scanning direction is reduced to about 1/4. Therefore, 8 pixels / mm × 3.85 lines / mm
When recording image information sent at a resolution of 400 dpi using a 400 dpi recording device, the received image information should be enlarged about twice in the main scanning direction and about four times in the sub-scanning direction. Is required.

[0006] As prior art disclosing that a low-resolution image information is enlarged and recorded by a high-resolution recording device,
For example, JP-A-62-25565, JP-A-62-6
No. 0358 and the like.

[0007]

Problems to be Solved by the Invention 8 pixels / mm × 3.8
Original information sent at a resolution of 5 lines / mm or 8 pixels / mm × 7.7 lines / mm is converted to, for example, 40
When recording with a 0 dpi recording device, when recording a B4 document on A4 paper, or when inch-millimeter conversion occurs, both the main scanning direction and the sub-scanning direction include a small number instead of an integral multiple. It is necessary to enlarge or reduce at a magnification.

However, although the prior art discloses that the received image information is enlarged twice in the sub-scanning direction, processing for enlarging or reducing the image information at any integer multiple or a magnification including a decimal number is disclosed. No consideration was given to

It is an object of the present invention to provide an image information processing apparatus capable of enlarging low linear density image information at an arbitrary magnification in the main scanning direction and the sub-scanning direction in view of the above-mentioned prior art. Another object is image information processing capable of enlarging low linear density image information in a main scanning direction and a sub-scanning direction at an arbitrary magnification, recording and outputting at a high linear density, and reproducing a high quality image. It is to provide a device.

[0010]

In order to achieve the above object, the present invention provides an enlargement ratio setting means for setting an enlargement ratio in the main and sub scanning directions, and is provided in each of the main and sub scanning directions. Adding means for adding the decimal part of the addition result and the enlargement ratio,
Enlargement processing means for inputting an integer part of the addition result and performing enlargement processing according to the integer part, and counting one pixel output signal.
Main scan direction enlarged block
And the sub-scanning direction expansion block that counts the line head signal.
Block block position counter and integer of each addition result
Comparing means for comparing the count value of each of the counters
And each of the counters is provided by a coincidence signal of the comparing means.
And clear the previous count value of each counter.
Add memory area to store the enlarged data
The feature is that it is made less .

[0011]

According to the present invention, according to the integer part of the addition result,
Since enlargement processing in the main and sub-scanning directions is selected, enlargement processing of an arbitrary size can be executed.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the drawings. FIG. 4 is a block diagram showing a hardware configuration of a facsimile apparatus incorporating the image information processing apparatus of the present invention. In the following embodiments, the image information processing apparatus is applied to a facsimile apparatus, but the present invention is not limited to this.

In FIG. 4, reference numeral 11 denotes a panel for instructing the facsimile machine to operate, 12 denotes a CPU for controlling the overall operation of the facsimile machine, 13 denotes a ROM containing a program executed by the CPU 12, and 14 denotes a program used by the program. This is a RAM serving as a work area. Reference numeral 15 denotes an image reading device that reads a transmission original and outputs binary image data, 16 denotes a compressor that converts the binary image data output from the image reading device 15 into code data, and 17 denotes a partner facsimile device. This is a communication control device for transmitting and receiving code data.

Further, 18 is a storage memory for storing the code data output from the compressor 16 and the code data received from the other party's facsimile machine, and 19 is the storage memory 1
A decompressor for reading out the code data from 8 and decompressing it into binary image data; 20 is an image information processing apparatus of the present invention for performing expansion interpolation processing on the binary image data output from the decompressor 19;
Reference numeral 21 denotes 2 which has been subjected to enlargement interpolation processing by the image information processing apparatus 20.
This is an image recording device that records value image data. Reference numeral 23 denotes a bus connecting the above components.

Next, the image information processing apparatus 20 will be described in detail with reference to FIG. FIG. 1 shows a block diagram of an embodiment of the image information processing apparatus 20. Note that the same reference numerals as those in FIG. 4 indicate the same or equivalent.

In FIG. 1, reference numeral 1 denotes a multiplexer (MU).
X), and selects one of the three data of the image data 19a, the white (“0”) data 8 and the previous line data 2a input from the decompressor 19, and outputs the selected data to the line buffer 2. This line buffer 2 has (2n +
1) It is a line buffer (n is a positive integer). In the present embodiment, an example of a 7 line buffer (n = 3) is shown.
The line buffer 2 stores a line to be corrected and image data of three lines before and after the line to be corrected.

Reference numeral 3 denotes a (2n + 1) .times. (2n + 1) register matrix for storing pixels around the pixel of interest on the line to be corrected. In the present embodiment, a register matrix of n = 3, that is, a 7 × 7 register matrix is shown, and 49 pixels around the target pixel are stored. Reference numeral 4 denotes an enlargement processing block for performing an enlargement process of k × l (k is an enlargement ratio in the main scanning direction, and l is an enlargement ratio in the sub-scanning direction).
In this embodiment, an enlargement processing block of k = 1 = 6 is shown. The enlargement processing block 4 can perform enlargement processing from 1 × 1 to 6 × 6.

Reference numeral 5 denotes a register for setting a magnification in the main scanning direction, and reference numeral 6 denotes a register for setting a magnification in the sub-scanning direction. Reference numeral 7 denotes a selection signal for selecting image data, that is, image data 19a, white data 8 and previous line data 2a, input to the multiplexer 1 in accordance with 7a1, the enlargement ratio in the main scanning direction and the sub-scanning direction. And select signals 7b1 and 7c1 for selecting one of the enlargement factors in the enlargement processing block 4.

Here, the preceding line data 2a is 7-bit data obtained by extracting 1-bit data for each line from the data of 7 lines stored in the line buffer 2. Reference numeral 8 denotes the white ("0") data.

Next, a specific example of the configuration of the main part of the control circuit 7 will be described with reference to FIGS. FIG. 2 shows a control unit in the sub-scanning direction, and FIG. 3 shows a control unit in the main scanning direction. Note that the same reference numerals as those in FIG. 1 in FIGS.

In FIG. 2, reference numeral 31 denotes a sub-scanning direction enlargement ratio work register which is cleared by a page head signal 36 indicating the head of the page, 32 denotes an adder, 33 denotes a position counter in the sub-scanning direction enlarged block, and 34 denotes a comparison. It is a vessel.

The adder 32 adds the enlargement value preset in the sub-scanning direction enlargement ratio register 6 and the value stored in the sub-scanning direction enlargement ratio work register 31, and the integer part of the addition result is in the sub-scanning direction. It is sent to the enlargement processing block 4 (see FIG. 1) as an enlargement block selection signal 7b1. The decimal part of the addition result is stored in the sub-scanning direction enlargement ratio work register 31.

For example, the sub-scanning direction enlargement ratio register 6
, The sub-scanning direction enlargement ratio work register 31 is first cleared to 0
Therefore, the adder 32 outputs 1.7 in the first addition, and the integer part 1 is a sub-scanning direction enlarged block selection signal 7b.
1 is sent to the enlargement processing block 4. On the other hand, the decimal part 0.7 is the sub-scanning direction enlargement ratio work register 3
1 is stored.

Next, since the result of the second addition is 2.4, the integer part 2 is the expanded block selection signal 7b in the sub-scanning direction.
1 is sent to the enlargement processing block 4, and the decimal part 0.4 is stored in the sub-scanning direction enlargement ratio work register 31. Hereinafter, the same operation is performed, and the value of the integer part output from the adder 32 is sequentially 2,1, 2,2,1,.
2, ...

Since the enlargement processing block 4 selects an enlargement block in the sub-scanning direction according to the data of the integer part, the image data is subjected to an enlargement processing of about 1.7 times on average.

Next, the configuration of the control unit in the main scanning direction will be described with reference to FIG. In the figure, 41 is a main scan direction enlargement ratio work register, 42 is an adder, 43 is a position counter in the main scan direction enlarged block, and 44 is a comparator.

The main scan direction enlargement ratio work register 41
Is cleared by a line head signal 35 indicating the head of one line. In the main scanning direction enlargement ratio register 5, an enlargement ratio in the main scanning direction is set in advance. The operation of the adder 42 is the same as the operation of the adder 32, and a description thereof will be omitted.

Next, the operation of the position counter 33 in the sub-scanning direction enlarged block block, the position counter 43 in the main scanning direction enlarged block block, and the comparators 34 and 44 shown in FIGS. 2 and 3 will be described with reference to the data example of FIG. I will explain. In FIG. 5, reference numeral 50 denotes an example of data temporarily stored in the register matrix 3, and reference numeral 51 denotes a memory area for temporarily storing enlarged data.

A line head signal 35 is inputted to the position counter 33 in the sub-scanning enlarged block, and a one-pixel output signal 45 is inputted to the position counter 43 in the enlarged block in the main scanning direction. The line head signal 35 and the one-pixel output signal 45 are supplied to the expander 19 shown in FIG.
Are different from the line synchronization signal and the bit synchronization signal used when outputting the image data 19a to the image information processing apparatus 20 from the.

Now, assuming that the integer part 7c1 in the main scanning direction is "3" and the integer part 7b1 in the sub-scanning direction is "2", the target pixel d4 of the data 51 in FIG. The magnification is doubled in the sub-scanning direction.
The addresses of the memory area 51 for storing the enlarged image information are the position 7b2 in the enlarged block in the sub-scanning direction and the position 7c2 in the enlarged block in the main scanning direction in FIGS.

Referring to FIG. 3, since the integer part 7c1 is "3", 3 is input to the A terminal of the comparator 44. When the one-pixel output signal 45 is input, the position counter 43 in the main scanning direction enlarged block counts up, and the count output is output as the position 7c2 in the main scanning direction enlarged block. In this specific example, when the count output becomes 3, the comparator 44 outputs the coincidence signal 7a2, so that 1, 2, and 3 are sequentially output as the position 7c2 in the main scanning direction enlarged block, and the output is: As shown in FIG. 5, it is an address in the main scanning direction of the memory area 51 for storing the enlarged data of the image.

Similarly, 1 and 2 are output as the position 7b2 in the sub-scanning direction enlarged block in FIG.
As shown in the figure, the address in the sub-scanning direction of the memory area 51 for storing the enlarged data of the image.

Next, the overall operation of this embodiment will be described with reference to FIGS. First, before the enlargement process is started, the multiplexer 1 of FIG. 1 selects the white data 8, and the white data is stored in the entire 7-line buffer 2. That is, the 7-line buffer 2 is cleared.

When performing the enlargement process, the CPU 12 sets the enlargement ratio in the main scan direction enlargement ratio register 5 and the sub-scanning direction enlargement ratio register 6, and outputs a start signal 23a to the image information processing device 20. Then, the multiplexer 1 sequentially reads the input image data 19a into the 7-line buffer 2 according to the input image data selection signal 7a1.

The input image data 19 is stored in the 7-line buffer 2.
When a is stored for four lines, the enlargement process is started.
FIG. 6A shows a state in which image data for seven lines including three lines of white data is stored in the seven-line buffer 2.

Immediately after the start, the sub-scanning direction enlargement ratio work register 31 is cleared by a page head signal, and the main scanning direction expansion ratio work register 41 is cleared by a line head signal 35.

Next, an operation start signal (trigger signal) 7a2 is input to the adder 42 of FIG. Thus, the adder 42 adds the enlargement ratio set in the main scan direction enlargement ratio register 5 and the value of the main scan direction enlargement ratio work register 41, and uses the integer part 7c1 as the main scan direction enlargement block selection signal. It is sent to the enlargement processing block 4. The operation start signal (trigger signal) 7a1 is also input to the adder 32 in FIG. Thus, the adder 32 adds the enlargement ratio set in the sub-scanning direction enlargement ratio register 6 and the value of the sub-scanning direction enlargement ratio work register 31, and uses the integer part 7b1 as the sub-scanning direction enlargement block selection signal. It is sent to the enlargement processing block 4.

The enlargement processing block 4 receives the enlargement block selection signals 7b1 and 7c1 in the main and sub-scanning directions and selects an enlargement processing block. For example, if the main and sub-scanning enlarged block selection signals are 3 and 2, respectively, the enlarged processing block 4 selects a 3 × 2 enlarged processing block.

Next, when one-pixel output signals 45 as shown in FIG. 7 are successively input to the position counter 43 in the main scanning direction enlarged block in FIG. 3, the position 7c2 in the main scanning direction enlarged block is inputted. Increases by 1, 2 and 3, and when it reaches 3, the comparator outputs the coincidence signal 7a2.

This signal 7a2 becomes not only a trigger signal of the adder 42 but also a clear signal of the position counter 43 in the main scanning direction enlarged block. Therefore, when the coincidence signal 7a2 is output, the adder 42 performs an addition operation, and the position counter 43 in the main scanning direction enlarged block is cleared.

The coincidence signal 7a2 is also inputted to the 7-line buffer 2 and the register matrix 3. Then, the 7-line buffer 2 shifts 1 bit for 7 lines in parallel. By this shift, 7-bit data 2a is moved to the head of the 7-line buffer 2 through the multiplexer 1. The situation at this time is shown in FIG.
Shown in

At the same time as the above operation, new 7-bit data is taken into the register matrix 3, and the old 7-bit data is erased. This situation is shown in FIG.
(b). As a result, the target pixel is changed from d4 to d5.

When the above operation is repeated and the processing for one line is completed, the second line head signal 71 shown in FIG. To enter. When the second line head signal 71 is input to the sub-scanning direction enlarged block intra-block position counter 33, the comparator 34 outputs the coincidence signal 7a1. The signal 7a1 enters the adder 32 as a trigger signal, enters the counter 33 as a clear signal, and also enters the multiplexer 1 (see FIG. 1) as a selection signal.

When the selection signal 7a1 is input to the multiplexer 1, the multiplexer 1 selects the input image data 19a for a certain period. Thereby, the input image data 1
9a is taken into the 7-line buffer 2 for one line. At this time, the oldest image data for one line in the seven-line buffer 2 is deleted. This state is shown in FIG.
Is shown in

When the enlargement processing block 4 is selected by the integer parts 7b1 and 7c1 in FIGS. 2 and 3, the enlargement processing block 4 stores the data in the register matrix 3.
The enlargement process is performed on the target pixel among the 7-bit pixels. The pixel data enlarged by this execution is the position 7c2 in the main and sub-scanning enlarged blocks.
It is stored at the address determined by 7b2.

As is apparent from the above description, according to the present embodiment, the image information can be enlarged to an integral multiple in the main and sub-scanning directions, and the enlargement factor including decimals can be easily enlarged. be able to. Therefore, when the present invention is applied to a facsimile apparatus, image information received at a low linear density can be reproduced by a high-resolution recording apparatus, and a high-quality image can be reproduced.

[0047]

As is clear from the above description, according to the present invention, there is an effect that image information can be enlarged to an arbitrary magnification.

[Brief description of the drawings]

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

FIG. 2 is a block diagram of a portion that performs processing in a sub-scanning direction in the control circuit of FIG. 1;

FIG. 3 is a block diagram of a portion that performs processing in a main scanning direction in the control circuit of FIG. 1;

FIG. 4 is a block diagram showing a hardware configuration of a facsimile apparatus to which the present invention is applied.

FIG. 5 is an explanatory diagram for explaining the technical meaning of the positions 7c2 and 7b2 in the main and sub-scanning direction enlarged blocks.

FIG. 6 is an explanatory diagram for explaining the operation of FIG. 1;

FIG. 7 is a timing chart of signals of main parts of FIG. 1;

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Multiplexer, 2 ... 7 line buffer, 3 ... Register matrix, 4 ... Enlargement processing block, 5 ... Main scanning direction enlargement ratio register, 6 ... Main scanning direction enlargement ratio register,
7 ... Control circuit.

──────────────────────────────────────────────────続 き Continuation of front page (72) Inventor Takenori Ohara 3-7-1, Funai, Iwatsuki-shi, Saitama Fuji Xerox Co., Ltd. (56) References JP-A-59-39158 (JP, A) JP-A-4 JP-A-204999 (JP, A) JP-A-5-183735 (JP, A) JP-A-5-183732 (JP, A) JP-A-63-139163 (JP, A) JP-A-4-62681 (JP, A) JP-A-3-58284 (JP, A) JP-A-63-29140 (JP, A) JP-A-63-26069 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) H04N 1/38-1/393 G06T 1/00-1/40 G06T 3/00-5/50 G06T 9/00-9/40

Claims (1)

(57) [Claims] An enlargement ratio setting unit for setting an enlargement ratio in the main and sub-scanning directions; and an addition unit provided in each of the main and sub-scanning directions for adding a decimal part of an addition result and the enlargement ratio. as input integer part of the addition result, and enlargement processing means for performing enlargement processing in accordance with the number parts 該整, fast-scan enlargement block for counting the pixel output signal
In-block position counter and sub-scanning direction enlarged block that counts line head signals
In-block position counter, integer of each addition result, and count value of each counter
And comparing means for clearing each of the counters with a coincidence signal of the comparing means.
At the same time, the count value of each counter is
The address of the memory area that stores the data
Image information processing apparatus characterized by the Uni.