JPH0581420A - Data input/output system - Google Patents

Abstract

PURPOSE:To eliminate the need for a work buffer for processing by performing prescribed rotation processing or mirror image processing of image data simultaneously with the input/output operation of data. CONSTITUTION:When a CPU 12 turns on a transfer starting register after setting transverse and longitudinal sizes, the input address, the output address, etc., to a transfer condition set register 5, a transfer control part 6 reads in values set in the transfer condition set register 5 and instructs differential start to an address control part 7, an address arithmetic part 8, and a data inversion processing part 11. The address arithmetic part 8 performs the arithmetic operation by an arithmetic rule information table 9. The address control part 7 generates the input address based on the calculation result. Data is successively inputted from addresses W.H-1, W.H-2, W.H-3... in order. The data inversion processing part 11 finds it by the arithmetic rule information table 9 that the data inversion processing is required, and the data read from the input address generated by the address control part 7 is inverted every time to be outputted.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a data input / output system, and more particularly to improvement of a data input / output system capable of rotating and mirroring image data.

[0002]

2. Description of the Related Art Conventionally, in a data processing device such as an OCR or DTP, when performing rotation processing / mirror image processing of image data, as shown in FIG. 11, image data read from a scanner is stored in an image memory. , CPU
Or control the rotation processing etc. by the drawing processor,
For example, a printer prints / outputs.

[0003]

However, in the conventional rotation / mirror image processing, a work buffer for processing is required, the load of the CPU is increased, and the processing is slow.
There is a problem that the next operation cannot be performed until the processing for the page is completed.

Specific examples of the above processing are shown in FIGS. As shown in FIG. 12, when the image data scanned from the document is displayed on the display, the intended processing may not be performed unless the document is correctly set in the top, bottom, left, and right. That is, in this case, the display is displayed in an inverted state. As shown in FIG. 13, when the scanned original is a double-sided original, the back side is 180 ° even if the front side is correctly scanned.
It may be reversed. That is, in this case, the back surface is displayed in an inverted state. As shown in FIG. 14, at the time of printing, it is necessary to change the development direction according to the paper direction set in the printer. In this case, it is necessary to rotate the characters to be printed or the data itself, and at the same time, to rotate the expansion coordinates, which requires complicated processing. As shown in FIG. 15, when performing double-sided printing, it may be necessary to rotate 180 ° during backside printing depending on the paper direction. That is, in this case, the front surface is displayed in an upright state, but the back surface is displayed in an inverted state. As described above, when scanning / printing, the entire page is often rotated.

However, conventionally, rotation processing takes a long time,
For the reason that one page of work memory is required for rotation and the like, it has been dealt with by means such as resetting the scanned document. Also, at the time of printing, the paper orientation must be known at the time of expansion, and "If the paper is changed during expansion, an error message will be output and the paper suitable for the expanded data will be requested." Processing was required. Therefore, an object of the present invention is to eliminate the need for a work buffer for processing in order to solve the above-mentioned problems.
An object of the present invention is to provide a data input / output method in which the load of the PU is not increased, the processing is fast, and the next operation can be performed before the processing for one page is completed.

[0006]

According to a first aspect of the present invention, in a data processing device having an image memory for storing data to be input / output with an image input / output device such as a scanner or a printer, an address for inputting / outputting data is set. Address translation device that translates
(LSB) and High (MSB) are provided with a data reversing device that mutually inverts each other, and at the same time as the data input / output operation, the image data is at least 180 ° rotated, 0 ° mirror image processed, or 180 ° mirror image processed. I was able to do. According to a second aspect of the present invention, a bit data conversion unit for extracting data to be accessed in bit units and a data register for storing the converted bit data for one byte are provided.
At least 90 ° rotation process, 180 ° rotation process, 90 °
Either mirror image processing or 270 ° mirror image processing can be performed. According to a third aspect of the invention, in the second aspect of the invention, the data register is composed of a shift register for 2 bytes, and the rotation mirror image processing of the image data which is not the byte boundary can be performed.

[0007]

According to the data input / output method of the present invention, regarding the image data at the same time as the data input / output operation, the address conversion device converts the address of the input / output data, and the data inverting device changes the data arrangement to Low ← →. Mutual conversion between High. Thereby, 180 ° rotation processing or the like is performed.
Further, in the data input / output method according to claim 2, regarding the image data at the same time as the data input / output operation, the bit data conversion unit extracts the data to be accessed in bit units and stores the extracted data for one byte in the data register. store. This stored 1 byte is transmitted,
The next data is taken out bit by bit and stored for 1 byte and transmitted. In the data input / output method according to claim 3, by securing a data register for two bytes, processing is performed on data obtained by shifting a blank portion generated when the width size of image data is set to byte boundary. I do.

[0008]

Embodiments of the data input / output system of the present invention will be described in detail below with reference to FIGS. First Embodiment FIG. 1 shows a block diagram of the first embodiment. IMAGIO1
Although it is a digital PPC, it can be used as a scanner or printer device by an I / F card. FIFO2
Performs data input / output to / from IMAGIO1. SIO3
Controls IMAGIO1. Image memory 4
Is a memory for developing image data to be printed or developing scanned data, and has a capacity of at least one page or more.

The transfer condition setting register 5 is a register for setting the next transfer condition. That is, the transfer type (90
Rotation, rotation 180 °, etc.), width size / height size / start address of transfered image data, transfer destination address, transfer start / stop designation. The transfer control unit 6 controls an address control unit 7, an address calculation unit 8, and a data inversion processing unit 11 described below. The address control unit 7 performs the following processing based on the address calculated by the address calculation unit 8. That is, when the data transfer is from memory to device, the address of the input destination is generated. Conversely, if the data transfer is from device to memory, an output destination address is generated. The address calculator 8 calculates an input / output destination address. The calculation is based on the calculation rule information registered in the calculation rule information table 9 described below.
This is done by incrementing / decrementing the counter variable of the calculation formula.

As shown in FIG. 2, the calculation rule information table 9 is a table in which information and data control methods for calculating input / output destination addresses are registered. The arithmetic counter 10 is a register for inputting a count value required for the address arithmetic unit 8 to perform arithmetic operations. The data inversion processing unit 11 exists between the data bus and the device, and performs Low-High inversion of data only when inversion is required by the information of the operation rule information table 9.

Next, the operation of the first embodiment thus constructed will be described. FIG. 3 shows a state at the time of 180 ° rotation. In this case, a graphic of horizontal = W bytes and vertical = H dots is to be printed out to IMAGIO1. First, the CPU 12 sets the horizontal / vertical size, the input address, the output address, etc. in the transfer condition setting register 5, and then turns on the transfer start register. Then, the transfer control unit 6 reads the value set in the transfer condition setting register 5, and instructs the address control unit 7, the address operation unit 8, and the data inversion processing unit 11 to start the operation. The address calculation unit 8 calculates from the calculation rule information table 9 according to the rule shown in FIG. The address control unit 7 generates an input address based on the calculation result of the address calculation unit 8.
As shown in Fig. 3, input from the address of WH-1,
Sequentially WH-2, WH-3 and so on.

The data inversion processing unit 11 learns from the operation rule information table 9 that it is necessary to perform the Low ← → High inversion processing of the data, and the data read from the input address generated by the address control unit 7 is inverted every time. To do. The inverted data is output to the FIFO2. The above is a series of processing. Where IMAGIO
In the case of scan input from 1, the address becomes an output address instead of the input address, the address controller 7 generates an output address, the data inversion controller 11 inverts the data, and then the address controller 7 generates the address. Data will be output to the address. Further, in the case of a 0 ° mirror image, the calculation of the address calculation unit 8 is performed according to the flowchart shown in FIG.

Second Embodiment FIG. 6 shows a block diagram of this embodiment. In the present embodiment, the data inversion processing unit 11 shown in FIG.
The data calculation unit 14 and the data register 15 are replaced, and other parts are the same as those in FIG. The data control unit 13 controls by inputting data or outputting data based on the address generated by the address control unit 7. The data calculation unit 14 is a calculation unit for processing data between the data control unit 13 → data register 15 or the data register 15 → data control unit 13. The data register 15 is a register for temporarily storing the data to be transmitted or received so that the data calculation unit 14 can process the data.

Next, the operation of the second embodiment thus constructed will be described. FIG. 7 shows the state at 90 ° rotation. FIG. 8 shows the address calculation processing in the case of this embodiment.
As shown in Fig. 7, in the case of 90 ° rotation, the address is set to W
It is necessary to take out only bit 7 of the data when changing to (H-1) +0, W (H-2), .... The data operation unit 14 takes out only bit 7 of the read data and sets it in the data register 15. And
Data is finally transmitted from the data register 15 when one byte of the data register is accumulated. When the transmission for one line is completed, the data operation unit 14 then takes out only bit 6 and performs the same process as described above. In this way, 90 ° rotation is realized by reading the data bit by bit. On the contrary, in the case of reception (scan), the data operation unit 14 takes out the data set in the data register 15 for each bit, and W (H−1) + 0, W
(H-2), ... The data control unit 13 writes the data to the image memory 4 bit by bit by OR processing.

Third Embodiment In the above description, the horizontal width size of the image data is all byte boundary.
However, the width of the image is actually 1 byte =
The value is not necessarily divisible by 8 bits. In this way, when the bite boundary is not present, as shown in FIG. 9, there is a possibility that an extra blank may be formed just by rotating as it is. Therefore, the data register 1 shown in FIG.
Reserve 5 for 2 bytes. In the rotation example shown in FIG. 9, WH
The 2-byte data of -1, WH-2 is read, and the data calculation unit 14 shifts the blank portion generated when the horizontal width size of the image data is set to the byte boundary. By performing the "inversion processing" or "bit extraction processing" described in the first and second embodiments on the 1 byte thus obtained, the inversion / mirror image processing is correctly performed.

Modifications In the first to third embodiments, the image data transfer between the memory and the device has been described. However, as shown in FIG. 10, by transferring the data input / output to / from the device side to the data bus side, the transfer between the memory and the memory can be performed. That is, as shown in FIG. 10, font expansion from the font ROM 16 to the image memory 4, input / output to / from another host interface 17, or data transfer using the DMAC 18 is possible.

[0017]

As described above, according to the first aspect of the present invention, since the data rotation / mirror image processing can be performed simultaneously with the input / output operation to / from the printer / scanner, the rotation processing is performed once before the output or Compared with the case where rotation processing is performed after input, the performance is further improved, the waiting time between rotation processing is eliminated, and work memory is not required. Further, when the print image is developed, conventionally, it is necessary for the CPU to perform the processing such as the rotation of the print font and the conversion of the print position in consideration of the rotation, but such a troublesome processing is not necessary. Furthermore, since the processing can be continued without worrying about the orientation of the original or the paper during scanning / printing, the user interface is improved. Further, 180 ° rotation / 0 ° mirror image / 180 ° mirror image processing can be performed. According to the invention of claim 2, in addition to the effect of the invention of claim 1, 90 ° rotation, 270 ° rotation, 90 ° mirror image, 27
0 ° mirror image processing can be performed. According to the third aspect of the present invention, even if the horizontal size of the image data is not the byte boundary, the rotation and the mirror image processing can be correctly performed.

[Brief description of drawings]

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

FIG. 2 is a diagram showing the contents of a calculation rule information table of the block diagram.

FIG. 3 is a diagram showing an operating state of the first embodiment.

FIG. 4 is a flowchart of the first embodiment.

FIG. 5 is another flowchart of the first embodiment.

FIG. 6 is a block diagram of a second embodiment of the present invention.

FIG. 7 is a diagram showing an operating state of the second embodiment.

FIG. 8 is a flowchart of a second embodiment.

FIG. 9 is a diagram showing another operation state of the second embodiment.

FIG. 10 is a block diagram of a modified example.

FIG. 11 is a diagram showing a conventional inconvenience.

FIG. 12 is a diagram showing a conventional inconvenience.

FIG. 13 is a diagram showing a conventional inconvenience.

FIG. 14 is a diagram showing a conventional inconvenience.

FIG. 15 is a diagram showing a conventional inconvenience.

[Explanation of symbols]

 1 IMAGIO 4 image memory 7 address control unit 8 address operation unit 9 operation rule information table 11 data inversion processing unit 13 data control unit 14 data operation unit 15 data register

Claims (3)

[Claims] 1. A data processing device having an image memory for storing data to be input / output to / from an image input / output device such as a scanner or a printer, an address conversion device for converting an address when data is input / output, and a row of data are set to Low. (LSB) and Hig
A data reversing device for mutually reversing with h (MSB) is provided, and at the same time as the data input / output operation, the image data can be subjected to at least 180 ° rotation processing, 0 ° mirror image processing, or 180 ° mirror image processing. A data input / output method characterized in that 2. A bit data conversion unit for extracting data to be accessed in bit units, and 1 for the converted bit data.
Equipped with a data register that stores bytes, at least 90 ° rotation processing, 180 ° rotation processing, 90 °
2. The data input / output system according to claim 1, wherein either the mirror image processing or the 270 ° mirror image processing can be performed. 3. The data input / output system according to claim 2, wherein the data register is composed of a shift register for 2 bytes, and the rotation mirror image processing of the image data which is not byte boundary is performed.