JPS6096959A - Free expansion device - Google Patents

Abstract

PURPOSE:To easily expand picture data to an optional size by converting the picture data to the series-parallel by synchronizing to a master clock obtained by a mask circuit. CONSTITUTION:A mask circuit 22 masking a specified part of a video clock 21, and a data conversion circuit 25 converting a picture data 24 to the series-parallel by synchronizing to a master clock 23 masked by the circuit 22 are installed at the free expansion device. The picture data 24 are supplied from a picture data supply source 26 to a data conversion circuit 25 successively and an expanded data 27 is obtained. The magnification of the data 27 can be expanded to the optional size according to the mask contents of the mask circuit 22.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an arbitrary enlarging device capable of enlarging a digital image at an arbitrary magnification.

[Prior art]

The analog image signal read by a photoelectric conversion device such as an image sensor can be converted into a digital image signal by performing binarization processing. Such digitized image signals are suitable for image processing such as image composition and movement.

However, as image processing advances, there is a growing need to enlarge images to a desired size in relation to the frame of a display screen or printing surface. In response to this demand, an arbitrary enlarging device has been proposed which enlarges an image signal read by mask scanning in the main scanning direction.

FIG. 1 shows an outline of this device.

In this arbitrary enlargement device, F I F O (1'1rst
(InFirst Out) Image data is stored in the memory 11. These image data are transferred to a D type flip-flop 13 in synchronization with the first tarokk signal 12.
4 bits each are latched. The four latch outputs A to 1) of the r) type flip-flop 13 are manually input to the corresponding input terminals Δ to I of the first to fourth 4-bit selectors 14-1 to 14-4. There is. These 4
The bit selectors 14-1 to 14-4 each select one of the input terminals in response to the manually inputted selection signal 15, and output the signal supplied to that terminal from the output terminal OUT. It looks like this. The image data of a total of 4 bits outputted in this manner becomes the parallel input of the shift register 16. The second clock signal 17 is transmitted from the shift register 16 to the enlarged serial image data 1.
This is a signal for outputting 8.

With this device, image data can be enlarged by an integral number from 1 times (equal size) to 4 times. This will be explained in order.

(1) Circuit operation when multiplied by 1: First, 4-bit image data is latched into the D-type flip-flop 13. Then, the selection signal 15 selects input terminal A for the first 4-bit selector 14-1, input terminal B for the second 4-bit selector 14-2, and -C for the third 4-bit selector 14-3. selects the input terminal C, and selects the input terminal C for the fourth 4-bit selector 14-4. As a result, both parallel data identical to the image data latched in the D-type flip-flop 13 are input to the shift register 16 .

Therefore, by performing parallel-to-serial conversion using the second tally signal 17, the desired image data 18 can be output. After outputting both 4-bit data 18, the next 4-bit image data is latched into the D-type flip 70 block 13 by the first clock signal 12. The same applies below.

(2) Circuit operation when the number is doubled: In this case, after latching the 4-bit image data to the D type flip 70 knob 13, the first
The second 4-bit selector 14-1, 14-2 selects input terminals 1 and 8, and the third and fourth 4-bit selectors 14-3, 14-4 select input terminal B. When the second clock signal 17 is generated for 4 bits in this state, the first two latch outputs Δ and B of the D type flip-flop 13 are doubled and the 4-bit/7-bit image data 18 It will be output as . After this, selection signal 1
5 to select the first and second 4-bit selector 1
For 4-1.14-2, input terminal C, and the third and fourth 4 bits, 7) Selector 14-3.14-4
For this, choose manual terminal. Then, the second clock signal 17 is generated again for 4 bits, and the remaining two latch outputs C and D of the D type flip-flop 13 are
Expand twice.

After the above two operations are completed, the next 4-bit image data is latched by the D type flip 70 knob 13 in the same manner as described above.

(3) Circuit operation at 3x magnification; Also in this case, the 4-bit image data before enlargement is first latched into the D-type flip-flop 13.

Then, in the first step, the selection signal 15 selects the
The 4-bit selectors 14-1 to 14-3 select the input terminal, and the fourth 4-bit selector 14-4 selects the input terminal I3. In this state, the second tallock signal 17 is generated, and both data 1 after being expanded by 4 bits are
Get 8. Next, as a second step, the selection signal 15 is switched, and the first and second 4-bit selectors 14-1.1
12 selects the input terminal B, and the third and fourth 4-bit selectors 14-3 and 14-4 select the input terminal C. In this state, the second tarlock signal 17 is generated, and the next 4 bits of image data 18 are obtained. Finally, in the third step, the first 4-bit selector 14-1 selects the input terminal C, and the remaining 4-bit selectors 14-2 to 14-4 select the input terminal C using the selection signal. In this state, a second cross-D check signal 17 is generated to obtain image data 18 for the last 4 bits.

After the above operations are completed, the next 4-bit image data is latched into the D type flip 70 knob 13.

(4) Circuit operation when the number is 4 times; In this case, the selection signal 15 selects each 4-bit selector 14.
-1 to 14-4, the same input terminals r.
Together, it becomes L. By controlling each 4-bit selector fil to 14-4 using the same horn method, 5 bits of image data can be selected.
Expansion to double volume is also +iJ capability.

However, although this proposed arbitrary enlarging device is capable of enlarging image data, it has the disadvantage that it is limited to integral multiples. Also, the selection signal 15 and the second
Another problem is that the control of the clock signal 17 becomes complicated.

[Purpose of the invention]

The present invention has been made in view of the above-mentioned circumstances, and an object of the present invention is to provide an arbitrary enlargement device that can perform arbitrary enlargement even at a magnification other than an integral number.

[Structure of the invention]

In the present invention, as shown in principle in FIG.
The arbitrary enlarging device is provided with data converting means 25 for converting the image data 24 from parallel to serial in synchronization with the image data 24. Then, the image data 24 is sequentially supplied from the image data supply source 26 to the data converting means 25, and enlarged data 27 is generated. The magnification of the enlarged data 27 can be changed by -C depending on the mask contents of the masking means 22.

〔Example〕

The present invention will be described in detail with reference to Examples below.

FIG. 3 shows the optional enlarging device of this embodiment. A FROM (programmable read only memory) 31, a first shift register 32, and a two-manual AND gate 33 of this device constitute a mask circuit that masks the video clock 21. The mask clock 23 output from the two-manual AND gate 3:3 is manually input to the second shift register 34. The parallel input terminals of this shift register 34 include l' l F
Both data 36 are supplied from the O memory 35 in I6 bits each.

Now, the FROM 31 is configured to output a clock pattern: 38 using the magnification designation signal 37 as -r trace information. The 41st item) represents the relationship between this tarok pattern and the magnification aperture/16 ([1 is any integer)] as the content of l'ROM:l1.

In this figure, the signal 60'' represents the portion where the video deck opening 21 is masked, and the signal ``l'' represents the portion where the video deck opening 21 is masked.

First, the case of 32/16 times enlargement (2 times enlargement) will be explained based on FIG. In this case, as shown in the bottom tank of FIG. 4, the clock pattern 38A (FIG. 5 a) in which the signals "0" and "i" appear alternately is
31 and set in the first shift register 32. This set content is read out by a predetermined video clock 21 (FIG. 5b) and ANDed with this video clock 21 itself. As a result, the two-man powered AND gate 33 outputs a mask clock 23Δ as shown in FIG. 5C.

On the other hand, the F [1" O memory 35 outputs 6-bit image data 36A (FIG. 5 d) to be enlarged. This image data 3 [iA is the signal "L 10101
The image data 36Δ is set in the second shift register 34, and the mask clock 23
Output by A. Zunawara mask clock 23A
Since the period is expanded to twice that of the video clock 21, twice the expanded data 27Δ (FIG. 5e) can be obtained from the output side of the second shift register 34.

Next, a case of 23/16 times enlargement will be described as another example based on FIG. 6. In this case, as shown in the almost central column of FIG. 4, the clock butter 738 B < FIG.
31 and set in the first shift register 32. This set content is video clock 21
(FIG. 6B), and the mask crotter 23B (FIG. 6C) is output from the two-manual AND gate 33.

Both data 3 FiB output from F+Fo memory 35
(Fig. 6 d) is expanded by increasing the mask clock 23 rJ i, and the enlarged data 27B (Fig. 6 e) is
It will be done.

〔Effect of the invention〕

As described above, according to the present invention, it is possible to enlarge the video tally of -C as image data to a factor other than an integer multiple, and furthermore, the apparatus is simplified and the reliability is improved.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of a conventionally proposed arbitrary enlarging device, FIG. 2 is a principle diagram of an arbitrary enlarging device of the present invention, FIG. 3 is a block diagram of an arbitrary enlarging device according to an embodiment of the present invention, and FIG. 4 is an explanatory diagram showing the contents of the FROM in the device of this embodiment, FIG. 5 is various waveform diagrams showing the operation when performing 2x magnification with this device, and FIG. 6 is a 23/16x magnification with the same device. FIG. 6 is various waveform diagrams showing operations when enlarging. 21...Video clock, 22...Mask means, 23...Mask black ivy, 24...
...image data, 25...data conversion, 27.
...Expanded data, 31...PIZOM, 32...W'1 shift register, 33...
・Two-person gate, 34...Second shift register, 36...
・Image data. Applicant: Fuji Nanakuchix Co., Ltd. Agent: Umeo Yamauchi, Patent Attorney

Claims (1)

[Claims] The apparatus includes a masking means for masking a specific portion of a video clock having a predetermined frequency according to the enlargement rate of the image data, and a data conversion means for converting both data from parallel to serial in synchronization with the mask crotter obtained by the masking means. An optional enlarging device characterized in that the converting means obtains enlarged image data.