JPH09130574A - Digital camera - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide the digital camera in which a layout condition and an aspect ratio condition are easily satisfied in the case of setting a trimming rectangular frame. SOLUTION: The digital camera is provided with a multiple array image sensor 13 extended in the main scanning direction and the multiple array image sensor 13 is moved along the subscanning direction to obtain a preliminary scanning image spread in the main scanning direction and the subscanning direction and to display the image onto a monitor 194b. A host computer 195 displays a trimming rectangular frame satisfying an aspect ratio received in advance from an input device 194a onto the preliminary scanning image. The trimming rectangular frame satisfying the aspect ratio is moved, magnified, reduced freely by the operation of the operator.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a digital camera, and more specifically, to a linear image sensor extending in the main scanning direction by moving the linear image sensor in the sub scanning direction with respect to an image of a subject. The present invention relates to a digital camera that obtains digital image data of a subject (a three-dimensional object, a planar reflector, a transmissive film, etc.) on a two-dimensional plane extending in the scanning direction and the sub-scanning direction.

[0002]

2. Description of the Related Art Generally, in a conventional digital camera, a trimming rectangular frame is determined on a prescan image obtained after performing a relatively low resolution scanning process called prescan at the time of photographing. Then, a desired output image is obtained by performing a main scan in the trimming rectangular frame with high resolution. This is because if the scanning process is performed at the resolution of the main scan, the amount of data of the entire image becomes large, and the scanning time and the data processing time become long.

Here, in determining the trimming rectangular frame, the positional relationship of the images in the trimming frame determined on the so-called "photographing rough" side (for example, the left of the person image in the trimming frame, Strictly observing the right, top, and bottom margins, which will be referred to as the layout hereinafter)
And the aspect ratio (ratio of height to width) of the trimming rectangular frame must be kept.

However, the conventional digital camera is
Only a predetermined “shooting frame” is displayed, and a trimming frame determination mechanism considering the aspect ratio is not provided. Therefore, complicated data processing is required for shooting with the specified aspect ratio.

On the other hand, in the field of known scanning devices, when setting the trimming frame while satisfying the aspect ratio as described above, a method generally called two-point click is adopted. In this method, a fixed point is first fixed and a drag operation is performed in an arbitrary direction to obtain a rectangular frame extending between the fixed point and the moving point. This 2
In the case of point click, according to the position of the moving point,
The aspect ratio also changes as the cutout position of the screen within the rectangular frame changes.

[0006]

As described above, in the conventional digital camera, there is no established method for determining the trimming rectangular frame according to the shooting rough.
Therefore, it is conceivable to adopt the two-point click method established in the field of conventional scanning devices in a digital camera. However, when this method is used, the aspect condition is not satisfied when the layout condition is satisfied. , Or vice versa, was very inconvenient.

Therefore, an object of the present invention is to provide a digital camera capable of satisfying both the layout condition and the aspect condition by a simple and easy operation.

[0008]

Means for Solving the Problems and Effects of the Invention The structure of the present invention for achieving the above object will be described below.
In order to clarify the correspondence relationship with the embodiments described later, each constituent element adopted in the present invention is provided with the corresponding reference numeral. However, it should be pointed out in advance that the reference numbers are given only for easy understanding and for reference, and do not limit the scope of the claims of the present invention.

According to the first aspect of the present invention, the linear image sensor (13) extending in the main scanning direction is moved along the sub scanning direction with respect to the image of the subject (10) so that the main scanning direction and the sub scanning direction are increased. A digital camera for obtaining digital image data of an expanding subject, comprising a display (194b)
A prescan image display means (195, 195a) for displaying a prescan image of the subject on the display, an input means (194a) for inputting an aspect ratio required for the input image, and a prescan image on the prescan image. A rectangular frame display unit (195, 195a) for displaying a trimming rectangular frame having an aspect ratio input from the input unit, and a rectangle for enlarging / reducing the trimming rectangular frame on the prescan image while maintaining the aspect ratio. Frame enlarging / reducing means (194a, 195, 195a) and rectangular frame moving means (194a, 195, 19) for moving the trimming rectangular frame on the prescan image while maintaining the aspect ratio.
5a) and.

In the first aspect of the invention, the trimming rectangular frame is displayed on the pre-scan image displayed on the display during the trimming operation by the rectangular frame displaying means. The trimming rectangular frame has the aspect ratio input from the input means in advance. The trimming rectangular frame can be enlarged / reduced by the rectangular frame enlarging / reducing means while maintaining the original aspect ratio, and can be moved on the image by the rectangular frame moving means. . Therefore, in the work, the operator first inputs the aspect ratio specified by the shooting rough or the like from the input means and enlarges the trimming rectangular frame displayed while the aspect ratio is protected by the rectangular frame display means. By trimming and moving, trimming can be performed properly. As described above, since the aspect ratio of the trimming rectangular frame is fixed in advance, the operator should pay attention to the so-called layout, and it is not necessary to pay attention to this regarding the aspect ratio. Therefore, the trimming work to be performed on the prescan image can be promptly and surely proceeded.

According to a second aspect of the present invention, in the first aspect of the present invention, the rectangular frame display means has a long side whose length is a predetermined ratio with respect to the length of the corresponding side of the display frame of the display. It is characterized in that the set trimming rectangular frame is displayed in the center of the display frame.

In the second aspect of the invention, when displaying the trimming rectangular frame on the display, the length of the long side is adjusted to a predetermined ratio with respect to the length of the corresponding side of the display frame of the display. And display it in the center of the display frame. Therefore, no matter what value is input as the aspect ratio (for example, if this ratio is selected to be about 70% of the display frame side length), the trimming rectangle can be easily seen by the operator. The frame can be displayed on the display, and the subsequent work can be performed easily and quickly.

[0013]

1 is a block diagram showing a schematic configuration of a digital camera 11 according to an embodiment of the present invention. In FIG. 1, the digital camera 11 includes a lens 1
An optical system having two and multi-row image sensors 13 and an image data processing system for processing digital image data obtained from this optical system are provided. This image processing system includes an amplifier & sample hold circuit 15 and an A / D converter 16
A shading correction circuit 17, an RGB misregistration correction circuit 18, a post-processing circuit 19, and memories 21a to 21.
c, an image memory 20 including a FIFO, a CPU 1
91, ROM 192, RAM 193, and input device 1
94a, a monitor device 194b, a host computer 195, and an operation software storage unit 19 for storing operation software for this computer 195.
5a and a memory 195b.

The digital camera 11 having the above structure
The electronic image data is obtained by scanning the projected image of the subject 10 formed by the lens 12 line-sequentially by the multi-row image sensor 13 and converting it into an electric signal. Note that the multi-row image sensor 13 is moved in the Y direction (sub-scanning direction) on the image forming surface of the lens 12 by the motor 14 when the subject 10 is imaged.

The output signal of the multi-row image sensor 13 is amplified and sample-held by the amplifier & sample-hold circuit 15, and then converted into a digital signal by the A / D converter 16. The output of the A / D converter 16 is given to the shading correction circuit 17 and is subjected to known shading correction. The output of the shading correction circuit 17 is R
It is given to the GB position shift correction circuit 18. The RGB position shift correction circuit 18 switches the feed speed of the multi-row image sensor 13 according to the input target scanning line number, and performs the line number conversion process of the reading line signal. Further, the output of the RGB position shift correction circuit 18 is given to the post-processing circuit 19 and subjected to various processing (for example, gamma correction) including at least resolution conversion processing and main scanning direction trimming processing. Here, the resolution conversion process is a process of thinning out the resolution of image data obtained at a high resolution corresponding to the total number of elements of the image sensor 13 to a predetermined output resolution in the main scanning direction. In the scanning direction, the image data obtained in the difference input resolution is similarly thinned to the output resolution.
The processed image data is stored in the image memory 20.
Is stored in The shading correction circuit 17, R
The GB misalignment correction circuit 18 and the post-processing circuit 19 operate according to the processing procedures stored in the memories 21a to 21c, respectively.

The ROM 192 stores an operation program for the CPU 191. The CPU 191 operates according to this operation program. RAM193
Stores various data necessary for the data processing of the CPU 191. The input device 194a is composed of a keyboard, a mouse and the like operated by an operator, and the monitor device 194b is composed of a CRT display, a liquid crystal display device and the like. With these devices, various instructions and data are input and displayed.
These input device 194a and monitor device 194b are
It is connected to the host computer 195. The host computer 195 operates according to the operation software stored in the operation software storage unit 195a. Here, the operation software includes trimming specification software for setting a trimming frame in a prescan image, output size and output resolution of a digital camera, and input size (substantially, this size is trimming size). It includes resolution setting software for obtaining the input resolution required at the time of shooting, data input software required for these input operations, grid designation software for designating display of a grid on a rough image, and the like.

The sub-scanning drive controller 196 is a drive circuit for operating the motor 14 shown in FIG. The feed speed of the multi-row image sensor 13 is controlled by the CPU 191 so that the input resolution determined by the resolution setting software described above can be obtained.

FIG. 2 is a diagram showing an optical system of the digital camera 11 shown in FIG. FIG. 3 is a perspective view showing a detailed configuration of the multi-row image sensor 13 shown in FIG.
As shown in FIG. 3, the multi-row image sensor 13 has three linear image sensors 132B, 132G, 132R each including a one-dimensional array of CCD light receiving cells 131. These linear image sensors 132B,
The 132G and 132R are integrally formed on a single substrate SB in a state of being arranged in three rows in parallel with each other.
In addition, the B color filter 13 is provided on the surface of each cell row.
3B, G color filter 133G, and R color filter 133R are fixed.

Returning to FIG. 2, the lens 12 is arranged in front of the light receiving surface of such a multi-row image sensor 13. Then, the subject 10 to be read is placed at a position facing the multi-row image sensor 13 with the lens 12 interposed therebetween. As is well known, the linear image sensor 132
B, 132G, and 132R perform main scanning by reading an image for each pixel in the longitudinal direction. Therefore, the longitudinal direction of the linear image sensors 132B, 132G, 132R coincides with the main scanning direction X in the image reading of the subject 10.

The multi-row image sensor 13 is sent at a predetermined speed V in the Y direction perpendicular to the main scanning direction X by the moving mechanism driven by the motor 14 in FIG. Therefore, the linear image sensors 132B, 132G, 13
The 2R and the projected image of the subject 10 move relatively in the Y direction at the speed V, and the Y direction becomes the sub-scanning direction.

With the above-mentioned arrangement relationship,
The linear image sensors 132B, 132G, 132R arranged in multiple rows along the sub-scanning direction Y have the same timing and instantaneous reading lines W _B , W _G , W on the subject 10.
Light alpha _R from _{R, α G, α B} (in the figure, only its center plane of the light path is shown) are respectively received. Then, the linear image sensors 132B, 132G, and 13 are moved in the Y direction at a predetermined repetition cycle.
The charge accumulation and charge transfer of the 2R CCD light receiving cell are repeated. The color filters 133B, 133G, and 133R respectively receive the B color component, the G color component, and the R color component of the subject 10 and photoelectrically convert them.

Next, the outline of the photographing work process using the digital camera will be described with reference to FIG. The photographing work includes a pre-scan process (step S1), a trimming setting process (step S2), and a main scan process (step S).
3). In the prescan process, the subject 10 is photographed at a rough resolution and prescan image data is acquired. The prescan image data is temporarily stored in the image memory 20. The prescan image data stored in the image memory 20 is read by the CPU 191 and given to the host computer 195. The host computer 195 displays the prescan image on the monitor device 194b according to the given prescan image data. In the trimming setting process,
On the displayed prescan image, the trimming rectangular frame is set so as to satisfy the predetermined layout condition and aspect ratio condition. After this setting is completed, in the main scanning step, the image within the trimming rectangular frame is main-scanned (high-resolution scan), and digital image data is acquired.

FIG. 5 is a flow chart showing the detailed operation of the trimming setting step of step S2. FIG.
6 is a flowchart showing a detailed operation of the main scanning process of step S3. Hereinafter, the trimming process and the main scanning process will be described in detail based on the flowcharts shown in FIGS. 5 and 6 and the image display examples shown in FIGS.

Before entering the flow of FIG. 5, the following state is assumed. 1. The “imaging rough” is determined in advance when photographing, and the layout required for the output image, the output size (width and height of the output image), and the aspect ratio, which is the ratio of the width to the height, are determined. 2. The above-described prescan process has been completed, and the prescan image is displayed on the monitor device 194b. From this state, the trimming setting work is started.

First, the operator selects and specifies the aspect ratio input menu (step S61). When this selection is made, the screen of the monitor device 194b is displayed on the screen shown in FIG.
As shown in the upper right of 0, an input screen for the trimming rectangular frame ratio (displayed as Trimming Box Ratio on the image) is displayed. Here, the operator inputs the horizontal width X and the vertical length Y (in units of mm) of the input image (step S62). In practice, this operation is an aspect ratio input operation. Here, the input range of X and Y is
1 to 999.

After the input operation by the operator is completed, the host computer 195 performs the normalization processing of the trimming rectangular frame (step S63). In this normalization process, the larger one of the horizontal width X and the vertical length Y is set to 70% of the image width Z of the image display area on the screen. The number of pixels in the image display area on the display screen is 372 for both X (horizontal) and Y (vertical). Therefore, the size of the long side of the trimming rectangular frame (that is,
The number of pixels) is 372 × 0.7 = 260 (pixels). On the other hand, the number of pixels on the short side of the trimming rectangular frame is set for each case as follows. (1) When the short side is the side in the X (horizontal) direction The number of pixels on the short side = (X / Y) x 260 (2) When the short side is the side in the Y (vertical) direction The number of pixels on the short side = (Y / X) × 260 However, in the above cases (1) and (2), X and Y are the aspect ratios input in step S62 described above, that is, the values of the horizontal width X and the vertical length Y of the trimming frame. Is. In addition, when the number of pixels on the short side obtained by calculation is not divisible, for example, the fractional part is truncated to be an integer.

When the vertical and horizontal display lengths of the trimming rectangular frame are set as described above, the host computer 19
5 displays a trimming rectangular frame at the center position of the image display area (the prescan image is displayed at this time) in the monitor device 194b (step S6).
4). As an example, a display state with an aspect ratio of 1 is shown in FIG. Preferably, the diagonal center of the trimming rectangular frame is
The display position of the trimming rectangular frame is determined so as to match the diagonal center of the image display area.

Next, the operator operates the mouse or the like provided on the input device 194a to enlarge, reduce or move the trimming rectangular frame (step S6).
5). By doing this, so that the layout conditions are satisfied,
The position and size of the trimming rectangular frame are set and operated on the prescan image. FIG. 8 shows an example of the moving state of the trimming rectangular frame, and FIG. 9 shows an example of the reducing state of the trimming rectangular frame. In these examples, the movement is performed by, for example, clicking the mouse at any point within the trimming rectangular frame and then dragging and dropping this point. In addition, the enlargement / reduction is performed, for example, by performing an drag-and-drop operation with an arbitrary vertex of the rectangular frame as a fixed point and a vertex at a diagonal position as a moving point.

Next, when setting of the trimming rectangular frame is completed as shown in FIG. 10 as an example (step S66),
The host computer 195 stores the position of each end point of the trimming rectangular frame (main scanning direction start point position x1, main scanning direction end point position x2, sub scanning direction start point position y1, sub scanning direction end point position y2) in the memory 195b. Yes (Step S
67). Thus, the trimming setting process is completed.

Next, the work shifts to the main scanning step shown in FIG. When the main scanning process starts, the CPU 191
Drives the motor 14 by the sub-scanning drive control unit 196 to move the multi-row image sensor 13 to the y1 position which is the starting point position in the sub-scanning direction (step S69).
After this movement, the digital image data from the start point position to the end point position in each direction is read according to the resolution in the main scanning direction and the sub scanning direction, stored in the image memory 20, and then displayed on the monitor device 194b. (Step S
70). In this way, all the work is completed.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a schematic configuration of a digital camera according to an embodiment of the present invention.

FIG. 2 is a diagram showing an optical system of the digital camera 11 shown in FIG.

3 is a perspective view showing a detailed configuration of a multi-row image sensor 13 shown in FIG.

FIG. 4 is a flowchart that briefly shows the flow of an imaging operation.

5 is a flowchart showing details of a trimming setting step shown in FIG.

6 is a flowchart showing details of a main scanning process shown in FIG.

FIG. 7 is a diagram showing an example of an initial display state of a trimming rectangular frame.

FIG. 8 is a diagram showing an example of a state in which a trimming rectangular frame is moved to a predetermined position.

FIG. 9 is a diagram showing an example of an operation situation for obtaining a trimming rectangular frame having a desired size by a reduction operation.

FIG. 10 is a diagram showing an example of a display state of a confirmed trimming frame.

[Explanation of symbols]

 10 ... Subject 11 ... Digital camera 12 ... Lens 13 ... Multi-row image sensor 14 ... Motor 191 ... CPU 192 ... ROM 193 ... RAM 194a ... Input device 194b ... Monitor device 195a ... Operation software storage 195b ... Memory 195 ... Host computer 196 ... Sub-scanning drive controller

Continuation of the front page (51) Int.Cl. ⁶ Identification number Office reference number FI Technical display location H04N 5/225 G06F 15/64 340A 5/262 H04N 1/04 Z (72) Inventor Ryo Kiyohara Kamigyo-ku, Kyoto Horikawa-dori Teranouchi 1-chome, Tenjin Kitamachi, 4-chome Tenjin Dai Nippon Screen Manufacturing Co., Ltd.

Claims (2)

[Claims] 1. A digital camera that obtains digital image data of a subject that spreads in the main scanning direction and the sub-scanning direction by moving a linear image sensor extending in the main scanning direction along the sub-scanning direction with respect to the image of the subject. A display unit, a prescan image display unit for displaying a prescan image of the subject on the display unit, an input unit for inputting an aspect ratio required for an input image, and a prescan image on the prescan image. A rectangular frame display unit for displaying a trimming rectangular frame having the aspect ratio input from the input unit; and a rectangular frame for enlarging / reducing the trimming rectangular frame on the pre-scan image while maintaining the aspect ratio. Enlarging / reducing means, and the trimming rectangular frame on the pre-scan image while maintaining the aspect ratio. A digital camera comprising: a rectangular frame moving means for moving the rectangular frame. 2. The rectangular frame display means is such that the length of the long side is
The trimming rectangular frame set to a length of a predetermined ratio with respect to the length of the corresponding side of the display frame of the display is displayed in the center of the display frame.
A digital camera according to claim 1.