JPS6395777A - Electronic printer - Google Patents

Abstract

PURPOSE:To obtain a picture magnified into K times laterally and logitudinally by obtaining thin and long partial picture having a recording paper width in vertical or horizontal direction being 1/K division of the paper in one pattern in response to the magnification K and outputting the thin and long pictures by K pictures sequentially and jointing them. CONSTITUTION:In response to the magnification K commanded to a control section 5, the read frequency of the frame memory 6 is set to 1/K, and a control circuit 7 reading K sets of partial pictures each formed by dividing number of horizontal or vertical picture element number of one pattern in response to the magnification K into 1/K respectively consecutively along the vertical or horizontal direction (direction without division), and an interpolation circuit 9 interpolating K sets of partial pictures to be the same picture elements in the horizontal or vertical direction as to each picture element of the picture information read from the frame memory 6, are provided. Thus, in the same model or size of a roll recording paper electronic printer, the picture is processed into a recording picture with an optional size.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a still image electronic printer, which is capable of obtaining enlarged images.

<Prior Art and Problems> A still image electronic printer prints images taken by an electronic camera on recording paper, and is a device that attaches a video floppy that has already been photographed and prints the contents on recording paper. Among these, for example, roll recording paper electronic printers are
Recording paper that is continuously wound in a roll is stored.For example, a roll of recording paper with a width of 80mm is stored based on the size of the service size (about 8゜m x 115m). When obtaining images, they are cut one by one (115-position each).

Therefore, this type of electronic printer is used as a round service size electronic printer.

However, when it is not possible to obtain large enlarged recorded images, such as enlarged photographs, using an electronic printer, it is necessary to change the size and model of the electronic printer itself, or to change the width of the roll recording paper.

In view of the above-mentioned problems, the present invention aims to provide a still image electronic printer that has the function of processing a recording image frame of any size among roll recording paper electronic printers of the same 81 types and sizes. shall be.

The present invention, which achieves two objects, stores image information for one screen in a frame memory at a writing frequency, and reads out the image information from this frame memory at a reading frequency. In a roll recording paper electronic printer having a circuit for reading out the frame memory, the readout frequency of the frame memory is set to 1/1 in accordance with the enlargement magnification commanded by the control unit.
, and the number of horizontal or vertical pixels in one screen is divided into 1 / 2 according to this enlargement magnification, and the resulting partial images are continuous along the vertical or horizontal direction on the side that is not divided. and an interpolation circuit for interpolating each pixel of image information read from the frame memory so that K identical pixels are obtained in the horizontal or vertical direction.

Depending on the magnification, one screen can be divided horizontally or vertically into elongated image frames with the width of the recording paper (directly or horizontally). The images are output in order, so if you stitch them together, you will get an image that has been enlarged vertically and horizontally.

EMBODIMENTS> The present invention will now be described in detail with reference to FIGS. 1 to 6. FIG. 1 shows a signal processing circuit of an electronic printer. When a video floppy, for example, is inserted into an electronic printer and the power and memory storage buttons are turned on, a predetermined track of this Videlov I'ZB will be played and the video 1 will be displayed.
No. 1 will be processed as No. 41.

In this state, the input terminal of the signal processing circuit has the first
As shown in the figure, the color difference signal, B-Y.

R, -Y, and luminance and synchronization chair number Y+3 are output.

In the circuit shown in Figure 1, 1 is the luminance and synchronization signal Y+
Synchronization separation circuits for extracting synchronization signals from S, 2a, 2b,
2c is an A/D converter that converts image information consisting of color difference signals B-Y, RY and synchronously separated luminance signal Y into digital signals; 3 is an A/D converter based on the synchronous signal S from the synchronous separation circuit 1; A/D converter 2m.

2b and 2c) is a needs lock circuit '#1 (PLL). In this case, the timing frequency f by PLL3 is determined by the number of pixels in one screen. For example, if the total number of pixels (640 x 512) is set to 640 horizontal pixels and 512 vertical pixels, this number of pixels is determined by the number of pixels in one screen. When a video floppy rotates once II (
A frequency of approximately 12 MHz is required to perform A/D conversion within 1/60 seconds) and to record the data into a frame memory, which will be described later.

4 is a write control circuit. This circuit 4 is PLL3
The timing frequency f is received, and the frame memory is accessed at that timing, and storage of image information in the frame memory is started by, for example, a print start command from the control unit 5.

6 is a frame memory. This memory 6 is accessed at a timing frequency f by the PLL 3 by the write control circuit 4 which receives a write command from the control unit 5, and stores digital signals which are image information of A/D conversion 4172m, 2b, 2e. do. in this case,
As for the frame memory 6, No. 41 B-Y, R-
For example, one that can store 640×512 pixels for each of Y and Y is required. When writing,
When applied to the horizontal address (H address) and vertical address (Y address) in the frame memory 6 for one screen as shown in FIG.
(line direction) (639, 0), (0, 1) to horizontal direction (H line direction) (639, 1)..., (0, 5
11) in the horizontal direction (H line direction) (639, 51
1) Writing will be performed along the H line direction.

In FIG. 1, 7 further represents a read control circuit. This control circuit 7 controls the frame memory 6 at a timing frequency f8 for reading the frame memory in response to a read command from the control section 5 based on the clock from the crystal oscillation value w8, or in response to an enlargement mode command from the control m5. Timing frequency f1 according to the enlargement magnification. It outputs l/K to the frame memory 6 and also specifies the read address in the enlarged mode (the mode with the enlarged magnification) in addition to specifying the read address in the normal mode (the mode with the enlargement magnification of 1). be. The normal mode readout of the frame memory 6 by the readout control circuit 7 is performed based on the readout command from the control unit 5 at the timing frequency f at the (HV) address of the frame memory 6 corresponding to the screen shown in FIG. Direction (V line direction) (0,0) to (0,511)
, (1,0) to (1,511), ..., (639,
0) to (639, 511).

In this case, there is no problem in reading out the frame memory 6 in the same way as writing in the horizontal direction.

Next, reading from the frame memory 6 in the 4x (m horizontal and 4x) enlargement mode will be explained. In response to an enlargement mode command from the control section 5, the timing frequency of the readout control port #7 is set to f7/4, and image information is read out at a speed four times slower than in the normal mode.

However, interpolation circuit 9, matrix times, @10, D/A times MP! 11a, 1lb, 11a
, the output is performed at the same frequency as normal.

On the other hand, for each original screen stored in the frame memory 6, address designation is performed so that the number of pixels in the (1) line direction is divided into 1/4. In other words, the number of pixels in the line direction is 51.
If you divide 2 into 4, it will be divided into 128 pixels each.

When reading out the frame memory 6, first, 128 rs are read out in the line direction in the same manner 4 times for each V line of the H address, and then read out in the H line direction, and then divided into 4 times in the line direction. , that is, the first time is the top 128 pixels on the screen, the second time is the bottom 128 pixels, etc.
・It is read out in four parts. In other words, (0,0
) ~ (0,127) (1,0) ~ (1,127)...
The first address specification is performed by saying (639,0) to (639,127) four times each, and then (0
,128) ~ (0,255) Ri・(639
, 128) to (639, 255) four times each, and then address (0, 256) to (0, 256) for the second time.
,383)...(639,256)~(639,38
3) Specify the address for the third time, 4 times each, and (0,3'84) to (0,511)... (
The fourth address specification is performed by saying 639, 384) to (639, 511) four times each.

In the read control circuit 7, the above-mentioned timing frequency fR
The above-mentioned address specification is performed at /4, but even if such reading is performed, it is insufficient to enlarge the screen in the V line direction. For this purpose, pixel interpolation is performed by an interpolation circuit 9. This interpolation circuit 9 performs four-pixel interpolation in the (1) line direction for each pixel of the read image information. In this way, the V line readout of the same H address is repeated four times, and 4L! in the V line direction for each pixel! By performing iI pixel-by-pixel interpolation, for example, one pixel corresponding to the (0,0) address shown in FIG.
This corresponds to 166 pixels corresponding to (0,0) in the figure.

If such readout and interpolation are performed for all pixels, 640 Ii! 7i elements are 640×4 =, 256
The number of pixels is 0111, and the readout 1 control circuit 7 described above
Divided into 4 by specifying the RO address and t'', ■ The pixels on the 128 side in the line direction become 128 x 42512@ @ dark numbers in the H line direction ((back) and V line direction (ul) respectively. It will be enlarged 4 times.If this interpolated image f is output at a timing frequency f corresponding to the print rate of the printer's normal mode, both sides will be printed 4 times larger in length and width. will be printed on roll recording paper, so V line direction 1 of the original screen
2560 pixels in the H line direction are printed for each 512 painters by interpolating 128 pixels of /4 by 4 times, and this printing is repeated 4 times for adjacent images to obtain a whole image that is 4 times the original screen in the vertical and horizontal directions. Figure 3 shows the first print screen corresponding to Figure 2, which shows the pixels obtained by dividing the original screen into four in the V-line direction and then adding the 128 square pixels of the divided screen in correspondence with the addresses. Yes, and Figure 4 shows the last of the same species (
This is the pudding l-screen of the 4th and last picture.

Returning to FIG. 1, 10 is B-Y, R, - after passing through interpolation circuit 9.
A digital signal consisting of Y and Y is converted into a primary color digital signal R.
, G, B, C, M, Y matrix circuit 11a
,llb.

lie is a D/A converter that converts the digital signal from the matrix circuit 1o into an analog signal No. 43; 12 is a synchronization signal generation circuit that generates the same synchronization signal as the read timing frequency f which is the print rate; and the interpolation circuit 9;
Matrix circuit 10, D/A change a W 11 a -1
This is a clock generation circuit for each of the 1b plies.

Figure 5 (al) (BL is the eye chart for the device shown in Figure 1). Block A). Then, when the print start button of the control section 5 is pressed (block B), the digital signals B-Y, R-Y, Y, which are image information, are stored in the frame memory 6 at a timing frequency of approximately 12 MH2. The signals B-Y, R-Y, and Y are stored for each pixel at the address specified by the write controller !84 (block C).If applied to the screen shown in the second review, for example, Address (o, o) ~ (639, 0),
(0,01~(639,1),...,(0,511)
~(639, 5111) is specified in 9 as described above.

Next, after writing to the frame memory 6, block D
It is determined whether the mode is normal mode (enlargement magnification 1) or not.
In normal mode, 1 written to frame memory 6
Information on the entire screen is read out at a sampling frequency f6 that matches the print rate of the printer (block E).

In this case, the reading control circuit 7 specifies the filter paper width in the vertical direction (short side) of the screen.
(0,01~(0,511)
(1,0)~(1,511)...(639,0)~(
639, 511).

Thereafter, the read image information is processed by the matrix circuit 10 without being interpolated, and the primary color signals R, G, B or C2M are processed.
, Y (block F). Then, it is D/A converted in block G and printed (block H). By repeating the processing from block E to block H, it is determined whether or not the vertical 1v lines, for example, addresses from (0, O) to (0,511) have been output (block I
), after outputting the IV line, add 1 to the H address (block J), and feed the roll recording paper by the IV line (block K).

In this way, when the output of the − fraction is completed (block L)
, feed out the specified amount of paper from the printer and cut the paper (
Block M), the printing operation is finished.

On the other hand, when the enlargement mode is specified, the process moves from block D shown in FIG. 5(a) to FIG. 5(b), a mode in which the enlargement magnification is, for example, 4x is specified, and the enlargement magnification is set to 4. be done. Based on this enlargement factor, the read sampling frequency is set to f0/4 (block N). As a result, the pixel readout time for the pre->operation becomes 1/4 times that of the normal mode, and the same pixel is read out four times in the V-line direction of the -H line. The read pixels are converted by a matrix circuit at timing frequency fFI (block O), D/A converted (block P), and printed (block Q). After repeating steps from block N to block Q and outputting 1v line (block R), the printer feeds the recording paper by 1v line (block S), and in K times mode, N =
Sew the operation up to block S until N = 4, that is, when the paper has been fed to 4 addresses vertically (block T), add 1 to address H (block U), and repeat the same operation ( repeat

In this way, printing is completed to 1/4 of the original full screen (block V), and when the horizontally long 1/4 ijj surface is printed, the paper is fed by a predetermined amount and cut (block W).

To read the second print, the V address corresponding to the first H line of the second print is given as an offset address in order to read from the adjacent part of the first print (
Block X). In this embodiment, there are 512 V addresses, which are divided into four, so that 512/4=128, and an offset address is given for every 128 addresses. In addition, setting the magnification: Although the offset address may not always be an integer value,
Only the integer part needs to be adopted. In this way, by repeating the above operation until the l■ address reaches the last line (block Y), the operation ends at the last line output.In this case, the four A set of long enlarged images can be obtained.

FIG. 6 shows the case where a print of this divided enlarged view is output. Providing a margin on the recording paper along the longitudinal direction is convenient for joining adjacent images to the recording paper.

<Effects of the Invention> As explained above, according to the present invention, recorded images of any size can be blended using roll recording electronic printers of the same model and size.

[Brief explanation of the drawing]

Figures 1 to 6 show one embodiment of the present invention, Figure 1 is a block diagram of the device, Figure 2 is a conceptual diagram showing the original full screen and addresses, and Figures 3 and 4 are enlarged prints. 5 (b) is a flowchart, and FIG. 6 is a perspective view showing the case of outputting an enlarged print. In the drawing, 2a, 2b, 2c are A/D converters; 11 a, 11 b, 11 c are D/A conversion 2g1
4 is a write control circuit, 5 is a control section, 6 is a frame memory, 7 is a read control circuit, 9 is an interpolation circuit, and AY are blocks.

Claims (1)

[Claims] In an electronic printer that has a circuit that stores image information for one screen in a frame memory at a writing frequency and reads out the image information from this frame memory at a reading frequency, the The side where the readout frequency of the frame memory is set to 1/K, and the number of horizontal or vertical pixels in one screen is divided by 1/K depending on the enlargement magnification, resulting in two partial images that are not divided. and an interpolation circuit that interpolates each pixel of image information read from the frame memory so that K pixels are the same in the horizontal or vertical direction. An electronic printer featuring