JPH06143730A - Image magnifying device - Google Patents

Abstract

PURPOSE:To provide an image magnifying device capable of obtaining an image properly magnified so as to become similar to the image of an indicated area. CONSTITUTION:It is discriminated whether the aspect ratio A/B of thermal paper is equal to or more than the aspect ratio C/D of a indicated area (S1). When this discrimination is YES, the ratio B/D of the longitudinal side D of the area and the longitudinal size B of the thermal paper is set to a magnification ratio ZOOM (S2). By ZOOM X C, the lateral size E of a printed image is determined and the lateral size B of the thermal paper P is set to the longitudinal size F of the above-mentioned image as it is ($31. It is discriminated whether A/B=C/D is formed (S4) and, in the case of A/Bnot equal to C/D, A-B is set as a blank lateral size G and a blank longitudinal size H is set to the longitudinal size B of the thermal paper P. The blank of the lateral size G and the blank of the longitudinal size H are distributed left and light (S8) and the image consisting of the longitudinal size F and the lateral size E is outputted to the center of the thermal paper P for the purpose of printing.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image enlarging device for enlarging an image in a designated area.

[0002]

2. Description of the Related Art As a conventional image enlarging device, one that executes the process shown in FIG. 5 is known. That is, this image enlarging device enlarges and prints a desired area of an original image displayed on a viewfinder or the like on a sheet of a predetermined size. By setting the masking M in each of the narrow range and the narrow range, the vertically long area b is designated. Then, the image of the designated area b is enlarged according to the vertical and horizontal sizes of the paper P, and a printed image b ′ in which the image of the area b is enlarged to the maximum on the paper P can be obtained. When narrowing the top and bottom of the original image a, the masking M is set in each of the upper and lower wide areas and the left and right narrow areas, so that the horizontally long area c
Is specified. Then, similarly, the image of the designated area c is enlarged according to the vertical and horizontal sizes of the paper P, and the image of the area c can be obtained as a print image c ′ of the paper P that is maximized.

[0003]

However, in the above-mentioned conventional image enlarging device, the image of the designated area is arranged in the vertical and horizontal directions at a magnification corresponding to the vertical and horizontal sizes of the paper to be printed. By enlarging, the enlarged print images b'and c'are obtained. Therefore, as in the relationship between the image in area b and the print image b ′,
From the aspect ratio b ₁ / b _{2 of} area b, the aspect ratio P ₁ / P _{2 of} paper P
Is large, a print image b'extended in the horizontal direction is formed, and as shown in the relationship between the image in the area c and the print image c ', the aspect ratio c ₁ / c ₂ of the area c is larger than the paper P. When the aspect ratio P ₁ / P ₂ is small, a print image c ′ extending in the vertical direction is formed. In other words, if the aspect ratio of the specified area and the aspect ratio of the paper to be printed are different, the print image will stretch in the horizontal or vertical direction accordingly, and the image of the specified area will be similar. It was not possible to obtain a properly magnified image such that

The present invention has been made in view of the above conventional problems, and an image enlarging device capable of obtaining an appropriately enlarged image that is similar to the image of a designated area. It is intended to provide.

[0005]

In order to solve the above-mentioned problems, in the present invention, an area designating means for designating an area of a displayed image, and an image of the area designated by the area designating means are arranged vertically and horizontally. And an image enlarging means for enlarging the image to a same size ratio. Further, in another configuration of the present invention, an area designating unit for designating an area of a displayed image and an image of the area designated by the area designating unit are set to have an aspect ratio and a predetermined size. And an image enlarging means for enlarging.

[0006]

In the above construction, when the area of the image displayed by the area designating means is designated, the image enlarging means magnifies the image of the designated area. At this time, the image enlarging means enlarges the image of the designated area to the same aspect ratio, so that the enlarged image and the image of the area are similar to each other and do not extend in a specific direction. Further, according to another configuration of the present invention, the image enlarging means enlarges the image of the designated area so as to fit in the aspect ratio and the predetermined size. It is possible to obtain an enlarged image that can be printed on A4 size paper or the like.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. That is, FIG. 1 is a block diagram showing the overall structure of the image pickup apparatus to which this embodiment is applied. This image pickup device is for directly transferring a subject to thermal paper, and elements are vertically arranged behind the lens 1 so that a line CCD 2 for reading an image one line at a time in a vertical direction can be horizontally moved. It is arranged. The line CCD 2 is capable of horizontally reciprocating the image plane of the lens 1, detects the exposure amount of the image plane on the forward path, and reads the image of the entire image plane line by line on the return path. Output an image signal. The image signal for each line sequentially output from the line CCD 2 in accordance with the movement on the return path is supplied to the preamplifier 5
The gain is adjusted to a constant value by the AGC amplifier 6, and the contour enhancement is corrected. The image signal output from the AGC amplifier 6 is processed by the shading correction circuit 11 to correct the brightness of the central portion and the peripheral portion of the image, and then subjected to gradation control and binarization by the binarization circuit 12 and binarization. The binarized binary image data is input to the pixel enlargement control and pixel memory 13.

On the other hand, the controller 10 controls the AGC amplifier 6 according to the AGC response control signal and controls the gradation control and binarization circuit 12 according to the dither data gradation control signal. Further, the controller 10 controls the pixel enlargement control and the pixel memory 13 by the transfer control signal and the zoom control signal, and controls the thermal head controller 14 and the motor control and drive circuit 15 by each timing control signal. The motor control and drive circuit 15 includes a CCD moving motor 16 for driving the line CCD 2 in the horizontal direction, a lens moving motor 17 for driving the lens 1 in the optical axis direction for focusing, and feeding of the A4 size thermal paper P. The feed motor 18 for rotating and driving a roller (not shown) is controlled. The motor control and drive circuit 15 outputs a drive pulse for transmitting electric charge to the line CCD 2 to the line CCD 2.

Further, the thermal head controller 14 is
Print data is generated based on the timing control signal output from the controller 10 and the pixel enlargement control and serial pixel data output from the pixel memory 13,
Transfer to the thermal head drive unit 19. Then, the thermal head drive unit 19 operates according to the transferred print data, so that finally the thermal paper P is an image for one screen when the line CCD 2 moves in the horizontal direction, The image based on the enlargement control and the pixel data enlarged in the pixel memory 13 is thermally transferred.

The key input section 3 is provided with an area designating key as well as a start key and other function keys which are operated when printing is started. Then, by operating the area designation key while looking through a viewfinder (not shown) on which the image of the image plane of the lens 1 is displayed, a signal for designating an area to be enlarged in the image of the image plane is input to the controller 10. . The designated area is transferred from the controller 10 to the pixel enlargement control and pixel memory 13, and the pixel enlargement control and pixel memory 13 is performed.
Expands only the binary pixel data in the designated area, temporarily stores it, and then transfers it to the thermal head controller 14 as serial pixel data.

Next, the operation of this embodiment having the above configuration will be specifically described. That is, when a subject such as a blackboard is imaged, the subject to be imaged is checked by looking through the viewfinder, and the area designation key is operated as necessary to designate the area to be enlarged in the subject image. Next, when you operate the start button, line C
The CD 2 is activated, and as described above, the image data of one vertical line of the image plane of the lens 1 is sequentially output on the return path. This one
The image data for the line is subjected to pixel enlargement control and pixel memory 13 via preamplifier 5, AGC amplifier 6, shading correction circuit 11, gradation control and binarization circuit 12.
Entered in.

Then, pixel enlargement control and pixel memory 1
3 operates according to the flowchart shown in FIG. 2 based on the transfer control signal and the zoom control signal output from the controller 10. Here, the variables A to H used in this flowchart are the values shown in FIG. 3 and below.

A: Horizontal size of thermal paper P on which an image is printed B: Vertical size of the same thermal paper P C: Horizontal size of the area designated by the operation of the area designation key D: Vertical size of the same area E: Thermal Horizontal size of the enlarged image printed on paper F: Vertical size of the enlarged image G: Horizontal size of the blank set on the side of the enlarged image to be printed H: Vertical size of the blank That is, in the flowchart of FIG. First, it is determined whether the aspect ratio A / B of the thermal paper P is equal to or greater than the aspect ratio C / D of the designated area (S1). If this determination is YES and the aspect ratio A / B of the thermal paper P is equal to or greater than the area aspect ratio C / D, the ratio B / of the area vertical size D and the thermal paper P vertical size B / Let D be the expansion ratio ZOOM (S2). That is, when the aspect ratio A / B of the thermal paper P is equal to or greater than the aspect ratio C / D of the area, the enlargement ratio is determined by the vertical size of both.

Next, by multiplying the enlargement ratio ZOOM by the lateral size C of the area, the lateral size E of the enlarged image is obtained.
And the horizontal size B of the thermal paper P is directly set as the vertical size F of the enlarged image (S3).
Subsequently, it is determined whether or not A / B = C / D, that is, whether or not the aspect ratio A / B of the thermal paper P and the aspect ratio C / D of the area are equal (S4).

If the determination is YES and the aspect ratios of both are the same, the horizontal size E and vertical size F of the enlarged image set in S2 can be obtained without providing blanks on both sides of the enlarged image. Vertical size A and horizontal size B of thermal paper P
Should match. Therefore, in this case, both the horizontal size G and the vertical size H of the blank are set to 0 to eliminate the need for the blank (S5), and an image composed of the vertical size F and the horizontal size E can be printed in the center of the thermal paper P. The data is output (S6). Based on this pixel data, the thermal head unit 14 generates print data, and the thermal head drive unit 19 operates according to this print data, so that the designated area in the entire area of the thermal paper P is the horizontal size E and the vertical size F. The image enlarged with is printed.

On the other hand, if the determination in S4 is NO and A / B ≠
In the case of C / D, the vertical size F of the enlarged image set by the processing in S3 is equal to the vertical size B of the thermal paper P, but the horizontal size E of this enlarged image is the thermal paper P.
This is the case when the horizontal size is smaller than A. Therefore, in this case, the difference A-E between the horizontal size A of the thermal paper and the horizontal size E of the image to be printed is set as the horizontal size G of the blank, and the vertical size H of the blank is the vertical size of the thermal paper P. B (S7), and the blank of horizontal size G and vertical size H is sorted to the left and right of the printed image (S7).
8). Then, the above-described S6 is executed to output pixel data capable of printing an image having a vertical size F and a horizontal size E on the center of the thermal paper P.

That is, S1 to S4 → S7 → S8 →
The processing procedure of S6 will be described using numerical examples of A to H shown in FIG. 3. Since A / B = 8/4 and C / D = 4/3, the determination in S1 is YES, and S2 is And ZOOM =
4/3 is set. In S3, the lateral size E of the enlarged image is set to E = 4/3 × 4≅5.33, and the vertical size F = 4 of the enlarged image is set to F = B = 4. In the determination of S4, A / B = 8/3
And C / D = 4/3, the two are not equal and the process proceeds from S4 to S7. In S7, G = AE = 8-
With 5.33 = 2.67, the blank horizontal size G = 2.
67 is set, and a blank vertical size H = 4 is set with H = B = 4.

Further, in S8, the blanks are divided into left and right, so the horizontal size of one blank is G / 2.
= 2.67 / 2≈1.36. And finally S6
Pixel data capable of printing an enlarged image composed of a vertical size F and a horizontal size E on the center of the thermal paper P is output, and the vertical size F is displayed on the thermal paper P as shown in FIG.
= 4, and a horizontal size E≈5.33, and an image having a vertical size H = 4 formed on both sides of the enlarged image and a blank consisting of a horizontal size G / 2≈1.36 are transferred by heat. To be done.

Here, the ratio of the vertical size F = 4 of the enlarged image to the vertical size D = 3 of the area, and the horizontal size E≈5.33 of the enlarged image and the horizontal size C = 4 of the area are both 1. 33, so the enlarged image is enlarged with the same aspect ratio. Therefore, the magnified image does not extend in a specific direction with respect to the image of the area, and the appropriately magnified image that is similar to the image of the area can be printed.

The image data required to obtain the enlarged image is generated as shown in FIG. That is, the pixel enlargement control and pixel memory 13 outputs the binary image data corresponding to one line input from the gradation control and binarization circuit 12 to each line No. .. are sequentially stored for each pixel, and pixel data forming one line is assigned to each pixel by 1 bit. 1,
Store as 2, 3, ...

Then, as in this example, the vertical direction is 1.4
In the case of magnifying at a magnification of 2 times and 2 times in the horizontal direction, each pixel No. Pixel data corresponding to
4, 4, ... Are made to overlap or to be made continuous without overlapping so that the number of bits of pixel data for one line is increased to 1.4 times the number of bits of the original image (a). Next, the data for one line increased to 1.4 times the number of bits is assigned to each line No. For each 1, 1, 2, 2,
It is possible to print the enlarged image (b) enlarged by 1.4 times in the vertical direction and 2 times in the horizontal direction by overlappingly printing like 3, 3, ....

Similarly, when enlarging with another vertical and horizontal magnification, the number of bits of the pixel data for one line of the original image (a) is increased by duplication according to the vertical magnification, and the data for one line is also increased. Is increased by overlapping according to the horizontal magnification, it is possible to print the enlarged image (b) with an arbitrary vertical and horizontal magnification. When a blank is provided in the vertical direction, the corresponding line number. Of all the corresponding line Nos. Are set to "0" indicating white and a blank is provided in the horizontal direction. By setting the bits up to the corresponding bit of “0” to indicate white, blanks are formed on the left and right sides or the upper and lower sides of the printed image.

On the other hand, S1 in the flow chart of FIG.
When the determination is NO and the aspect ratio A / B of the thermal paper P is less than the aspect ratio C / D of the area, the ratio A / of the lateral size C of the area and the lateral size A of the thermal paper P is C
Is set as the enlargement ratio ZOOM (S9). That is, when the aspect ratio of the thermal paper P is less than the aspect ratio of the area, the enlargement ratio is determined by the lateral size of both.

Next, by multiplying the enlargement ratio ZOOM by the vertical size D of the area, the vertical size F of the image to be printed is determined, and the vertical size A of the thermal paper P is used as it is as the horizontal size E of the image. Set (S1
0). Subsequently, the blank vertical size H is determined based on the difference between the vertical size B of the thermal paper P and the vertical size D of the area, and the horizontal size A of the thermal paper is set as the blank horizontal size G (S11). Further, the blank having the vertical size H and the horizontal size G is sorted to the left and right of the image to be printed (S12). Then, the above-described S6 is executed to output pixel data capable of printing an image having a vertical size F and a horizontal size E on the center of the thermal paper P. As a result, the thermal paper has blanks at the top and bottom,
It is possible to print an image magnified with the same aspect ratio as the image of the area.

[0025]

As described above, according to the present invention, the image of the designated area is enlarged at the same aspect ratio, so that the image of the designated area is not stretched in a specific direction. It is possible to obtain an appropriately enlarged image that is similar to the image. Also, because the image in the specified area is enlarged to fit the aspect ratio and the specified size, when printing on paper of the specified size, the enlarged image of the aspect ratio without any problem in relation to the paper surface. Can be printed.

[Brief description of drawings]

FIG. 1 is a block diagram of an image pickup apparatus to which an embodiment of the present invention is applied.

FIG. 2 is a flowchart showing an image enlarging operation in the image pickup apparatus.

FIG. 3 is a diagram showing variables A to H used in the flowchart of FIG.

FIG. 4 is a diagram showing a processing content of enlargement processing in the imaging apparatus.

FIG. 5 is an explanatory diagram showing enlargement processing in a conventional image enlargement apparatus.

[Explanation of symbols]

 2-line CCD 10 controller 13 pixel enlargement control and pixel memory 14 thermal head controller

Continuation of the front page (51) Int.Cl. ⁵ Identification code Office reference number FI Technical display location H04N 1/393 4226-5C 5/228 Z 5/262 7337-5C

Claims (2)

[Claims] 1. An area designating unit for designating an area of a displayed image, and an image enlarging unit for enlarging an image of the area designated by the area designating unit in a horizontal and vertical ratio. Image magnifier. 2. An area designating unit for designating an area of the displayed image, and an image enlarging unit for enlarging the image of the area designated by the area designating unit so that the image has an aspect ratio and a predetermined size. An image enlarging device having.