JPS6167367A - Picture controller - Google Patents

Abstract

PURPOSE:To rotate a picture by rewriting a rotated picture element while rows and columns of data are replaced into the picture memory after the picture data for one page's share is read to a register file once to use one picture memory. CONSTITUTION:The picture data (b) for one page's share stored in the picture memory 1 is read once to a N-row X M-column constitution register file 3 by using an address signal (a) outputted from an address generating circuit 2. Then the picture data (c) rotated while rows and columns are replaced is rewritten on the picture memory 1. Thus, the picture data is rotated without providing separately a picture memory for one page's share.

Description

DETAILED DESCRIPTION OF THE INVENTION (Part II relates to a print image control method for a Torato Matrix printer device 2L?, and in particular relates to a print control device that can rotate and print an image for 7 1-page pages or a portion thereof. .

Prior art The conventional print stroke R1A position is as shown in FIG. 4(A).
One page of image data is stored in an image memory l that can store one page of pixel data in N rows and M columns, and Xj! The image data stored in the portrait memory l is read line by line and printed. And I+! ! When printing the pixel data stored in the image memory l by rotating it by 90'', the same figure (B
), mXm=N (in the figure, m=4.N=
1G), and has a total of NXN pixels.
An image memory 1' for one bay per minute is prepared, and the internal element data read out in units of N bits from the image memory 1 is edited and stored in each area of the portrait memory 1'. Arrange as follows. Each pixel data 'l-1-
a, +. +4 is the pixel data a1.1~ in FIG. 4(A)
The image memory 1' in FIG. 4(B) is assigned an address for each area, and the pixel data of one area (4X4=16 hints) can be occupied at the same time. It can be loaded or read at any time. In this way, by dividing into small areas, it is possible to reduce the number of reads when reading by interchanging rows and columns. For example, in order to read al, 1 to &+61 in the first column, first, In one read, the first area (1
), read out a11 to a14 and select a, 1 to a
Now store 1 (4 hits) in a register not shown and 8
Then, among the data read from the second area (2), a
Store rl~a t , + in the above register, read it four times in the same way, and read the data a+-1~a11 of the first column.
(16 bits) can be stored in the above register. Then, if the 18 bits of pixel data stored in the above register are arranged in the row direction and printed, 8 bits can be stored in the counterclockwise direction.
One line of the image rotated by 0" can be printed. Second
The following rows can be printed in the same way by reading out four times (if not divided into small areas, it is necessary to read out the necessary pixel data one bit at a time from the data read out from the 16th row by reading out 16 times). ).

The conventional device described above has the disadvantage that it is uneconomical because it requires two image memories of 1 p/min in order to rotate the image. In addition, since m readings (four times in the above example) are required to print N pixels, there is a drawback that it cannot be used in a high-speed printer Rδ.

Objective 1-1 of the present invention is to solve the above-mentioned conventional drawbacks and to
By providing a register file with an N matrix configuration, the rows and columns of NXN pixel data read from one image memory are interchanged, and the data is stored again in the image memory, thereby making it possible to use one image memory. The object of the present invention is to provide an image system W#2J which can rotate a printed image and print at high speed.

Configuration of the Invention The unpublished II+ image control device has a one-page image memory that can write or read data in units of N bits.

NXN bit notes! It has a built-in element and is transferred from the image memory in units of N bits per row! Ije data in one column N
a register file that can be read bit by bit, and after reading one page of image data stored in the image memory into the register file for each area of N rows by N columns, The method is characterized in that the pixel data is rotated by exchanging columns and rewriting the pixel data into the image memory.

Embodiments of the Invention Next, the present invention will be described in detail with reference to one drawing.

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

That is, the image memory 1, the address generation circuit 2 for generating the 1 write/read address signal a of the image memory 1, and a matrix configuration of N rows and XN columns, and a write address signal d output from the address generation circuit 4. It is composed of a register file 3 capable of writing N bits of pixel data in a designated row and reading N bits of pixel data from a designated column by a read address signal e outputted by an address generation circuit 4.

The image memory l is a normal image memory with a capacity φ that stores the print image data of one page of sentences, and stores the image data of the print pixels in scanning order in the main scanning direction of printing in units of 1 address I6 bits. . In other words, when the length in the main scanning direction (l life sentence) is +8XL hit, the print ri
Image data of 16 rows x 16 columns starting from address K of the image is address K.

K+LJ÷2L', +3L, K+1
It is stored in 5L.

The address generation circuit 2 is an address generation circuit that can sequentially output 7 trace signals added or subtracted by L, and specifies the read or write address of the image memory 1 by the address signal a.

The address generation circuit 4 is an address signal generation circuit capable of addition and subtraction of ±1, and generates a write address signal d and a read address signal e for the register file 3.

Register file 3 has 16 lines x 1 as shown in Figure 2.
Memory elements having a matrix configuration of 6 columns, 1 to R1 (, +
4, and each storage element is composed of a tri-state output flip-flop. In addition, the memory of the rotating row, DoF, stores the respective input pixel data r1 to r+g all at once according to the interpolation signal supplied from the write line of the l tree, and also stores the pixels stored in the memory elements of the same column. Data is,
The read pixel data S, +5 . ．． For example, (°°l″ of write address signal d)
When the write line P1 goes high (corresponding to the above), the write pixel data r1 to r+g are stored in the storage elements (flip-flops) R14 to R118, respectively. Furthermore, when the read signal line q1 becomes high level (corresponding to “t” of the read address signal e), the memory element R
The stored data of 11 to R14,1 is read pixel data S,
-S, , is output.

Next, the operation of this embodiment will be explained. Now, at the address of image memory l, +L, +2L, +3L, etc.
....

Assume that the pixel data of 18 rows and 18 columns stored in K, 15L is rotated counterclockwise by 30''. First.

The address signal a output from the address generation circuit 2 reads out the pixel data stored at the address in the image memory l, and stores it in the first iT of the register file 3. If it is 1゛°, the write cotton P1 becomes high level and the read data b (R+-R+,) from the image memory 1 is written to the first line of the register file 3. Image memory 1 +
Read the pixel data at address 1, write it to the second line of register file 3, and similarly write the pixel data at address K+15L to JK◆, 2+2L, ◆IL, etc. of 1 image memory l. are sequentially stored in each row of the register file 3.

Next, the read address signal e is set to 16, the data in the 1lf1 column of the register file 3 is read out, and the pixel data at the address of the image memory l is updated with this read data C (s+ "!+s). This is as follows.

By setting the address signal a@, pixel data aM&~al&+4 as shown in FIG. , the 15th register file 3
The pixel data read from the column causes the image memory l to be
Update L address. In the same way, sequentially +2L, +
3L, ......, ◆15L a, the pixel data of the 14th to 1st columns of the register file 3; I'
In this way, one image memory l is filled with +
L, ni◆2shani+3L,..., ni◆15L
As shown in FIG. 3, the image data rotated by 90'' by swapping the rows and columns of the initial pixel data is stored in the # area.The above rewriting involves 16 read operations and 1
It is executed quickly by six aging operations. and,
If the pixel data stored in the image memory l is read out and printed in the usual way, a print image rotated by 90 degrees can be printed at high speed.

This embodiment can be applied to a high-speed printer, and since it is not necessary to use one page of image memory in addition to the image memory 1, it is advantageous in that it can be constructed at low cost.

Note that the register file 3 can also be configured with a latch circuit, a random access memory, a multiplexer, etc., and can also be formed into a small LSI using a small circuit ML8. Furthermore, when used in a printer device that has a microprocessor,
-Reading of image memory l by P microprogram 2
It is also possible to realize the function of the register file 3 by performing the operation TLt3 and updating the image data.

Effects of the Invention As described above, in the present invention, the image data stored in the image memory is once read out to a register file having a structure of N rows and XN columns, and the pixel data written in the register file is rotated by 90 degrees to create an image. Since the configuration is such that the image data in the image memory can be updated by the data, it is desirable to rotate the image data economically without separately providing an image memory for one page, and the image data in the image memory can be updated. This has the effect of allowing high-speed printing based on image data.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an embodiment of the present invention, FIG. 2 is a circuit diagram showing an example of a register file in the above embodiment, and FIG. 3 is a block diagram showing an example of a register file in the above embodiment. Figures 4(A) and 4(CB) showing pixel data are diagrams showing a conventional image memory and another image memory, respectively. In the figure, 1: image memory, 2: address generation circuit,
3 register file, 4 register address generation circuit, a: address signal, b 2 read data from image memory, c read data from 2 register file, d input address signal, e: read address signal, R11 to R2, :
Memory element, P+ to P+g, two old signal lines, Ql -q
+s: Read signal line, rl ~ rl! Write pixel data, 51-S16: Read pixel data.

Claims (1)

[Claims] It has a built-in image memory for one page that can be written or read in units of N bits, and a memory element of N×N bits, and reads image data transferred from the image memory in units of N bits per row in units of N bits per column. The image data for one page stored in the image memory is once read into the register file for each area of N rows by N columns, and then the rows and columns are swapped and rotated. An image control device characterized in that pixel data is rewritten into the image memory.