JPS602983A - Image processor - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Technical Field) The present invention relates to an image processing apparatus that represents characters and figures using a dot matrix, and more particularly to an image processing apparatus configured to perform horizontal and vertical conversion of the characters and figures.

(Prior Art) Conventionally, it has been common to display the results of processing on a computer as characters or figures on an RT, printer, or the like. Taking characters as an example, these devices usually display one alphanumeric character by dividing it into approximately 7 x 9 pixels. Further, when displaying a pattern, the size is generally about 24×24.

In the case of a CRT, since the raster is scanned horizontally, a 5-character generator (CC) configured to read out a horizontal row of dots 1fJi in one access is used. There is. However, since it is common for printers to construct a head by arranging wires vertically, it is convenient to use a character generator that is configured to read out a row of vertically arranged dots in one access. .

By the way, when there is a large amount of information such as letters, it is cost-effective to store the character generator in the host (computer) rather than converting it into a ROM and incorporating it into a CRT or printer. When a CRT and a printer are used together, the following contradictions arise.

In other words, in a computer storage device, if dot information of m rows and n columns is stored row by row, it is convenient for a CRT, but it is inconvenient for a printer. is convenient, but it is inconvenient for CRT. For this reason, in the past, conversion was performed using software at the expense of one or the other.

(Objective) In view of the above-mentioned points, it is an object of the present invention to provide an image processing device that eliminates the speed reduction when vertical/horizontal conversion is performed by software.

Another object of the present invention is to provide an image processing device that can efficiently rotate not only text but also graphic information by ±90°.

In order to achieve such an object, the present invention includes a shift register connected to each signal of a data bus, and means for reading dot data in parallel in a predetermined order after loading the dot data into the shift register. Configure to perform horizontal and vertical conversion of data.

(Example) Hereinafter, the present invention will be described in detail with reference to the drawings.

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

In the figure, the data bus consists of 8 bits, no.
These are indicated by the signal names D7 to D7. Serial in/parallel out type shift registers 1 to 8 are connected to these signals DO to D7. The length of each shift register does not necessarily have to be equal to the width of the data bus, and can be determined depending on the application. However, it is convenient to match the width of the data bus because the output data can be returned to the data bus again.

In the figure, when 8-bit dot data is placed on the data bus and a shift pulse (sp) is applied, the contents of each shift register are shifted to the right by 1 bit, and the data on the data bus is placed on the left end. is input. By repeating this operation a number of times equal to the length of the shift register, all bits of valid data are loaded into each register.

Next, part of the address bus (AO to A2) is sent to the decoder 8.
When inputting and applying a read pulse (RP), one of shift registers 1 to 8 is selected and parallel output data is obtained on data bus BO.

Normally, clockwise or counterclockwise information is obtained by reading the registers sequentially from top to bottom or from bottom to top, but it is also possible to read every other register as in the case of an interlaced CRT. be.

(Effects) As described above, according to the present invention, the operation of vertical/horizontal conversion of frequently occurring dot information can be performed inexpensively and efficiently, so that a versatile image processing device can be easily obtained.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing one embodiment of the present invention. 1 to 8...Shift register, 8...Decoder, DO to D7...Data bus number, AO to A2...Part of address bus signal, s'p...
・Shift pulse, RP...read pulse. Patent applicant Key “Non Co., Ltd.

Claims (1)

[Claims] After loading a plurality of shift registers connected to each signal of a data bus and don't data into the shift register, one of the shift registers is selected and the data loaded into the shift register is read out in parallel. 1. An image processing apparatus, comprising means for vertically and horizontally converting the dot data.