JP2007180988A - Imaging apparatus, display method, shake image confirming method, program, and storage medium - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an imaging apparatus capable of displaying a photographing image in a print size, and to provide a shake image confirming and displaying method, a program, and a storage medium. <P>SOLUTION: When a user selects a print size (i.e., the size of printing paper or the size of an image to be printed) during the displaying of a through image 41 (Fig.3(a)) with the size of a monitor screen 5 in a photographing mode, the image with the selected print size (Fig.3(b), 3(c)) is displayed. The print size can be changed over by a key operation. Besides, the image can be magnified so as to visually recognize the existence of a shake at a site. When a large print size such as an A4-size is selected, a part (a part within a frame 56) of a whole subject image 55 is magnified into an image 57 with the screen size of the liquid crystal monitor 5 so as to be displayed (Fig.3(d)). <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a technique for displaying a captured image by an imaging apparatus such as a digital camera, and more particularly to an imaging apparatus capable of performing through display at a print size, a display method, an image blur confirmation method and a program.

When the captured image is printed, it can be printed in various sizes such as L plate, 2L plate, postcard size, B5, A4, and A3.
2. Description of the Related Art Conventionally, when using an image taken with a digital camera as a print image, there is a technique for calculating and displaying a maximum size that can ensure the quality of the print image (for example, see Patent Document 1). In the technique disclosed in Patent Document 1, the total pixel number Q and the aspect ratio A = x: y of the digital camera are input, and the resolution k necessary for the print image is input, and the total pixel number Q and the aspect ratio A are set. From the vertical and horizontal pixel counts Qy and Qx calculated on the basis, the vertical and horizontal maximum sizes Y and X of the print image capable of realizing the necessary resolution k are calculated and displayed.

  In addition, if you take a picture so that you can print a photo of a specified size that can be used, select the type of ID photo and select the print size, then the frame of the selected ID photo according to the selected print size The image is displayed on the through image and waits until the shutter is pressed. During that time, the photographer is in the direction of the camera or the photographed person so that the upper body of the photographed person fits within the frame. When the photographer operates the shutter while the upper body of the subject is within the appropriate range within the frame, the shooting process is executed, and the shot image with the frame placed on the through image Some image data is recorded in a memory, and print size information is also recorded in the memory in association with the image data (see, for example, Patent Document 2).

  An image taken with a digital camera is displayed on the monitor, but is usually displayed on the monitor according to a magnification determined based on the size of the liquid crystal screen of the monitor. However, in recent years, various liquid crystal screen shapes and sizes have been used. As described above, since many digital cameras display captured images on different liquid crystal screens, there is a problem that even if the same subject is displayed, the size of the display image varies depending on the type of camera.

  In general, the size of the print image is determined by the number of pixels, and the print pixel (number of dots) of the printer is determined by the model of the printer. Therefore, the print size depends on the number of pixels of the image sent to the printer. For example, when an image taken with a camera-equipped mobile phone with a small number of pixels is printed, it is printed small because of the reasons described above. If the image has a pixel size of, for example, 640 × 480, it is printed with a size corresponding to that. In the case of an image having a pixel size of 1280 × 960, the image is printed with a size twice as long and twice as wide as a whole and a size four times as large as the whole. In addition, the number of pixels of an image that can be displayed on the display screen of an imaging device such as a digital camera (so-called number of pixels of liquid crystal) is usually smaller than the number of pixels of the entire photographed subject image (so-called effective pixel number of the image sensor). In this case, when sending the image data to the display buffer, the pixels are thinned out and adjusted to fit the display screen. On the other hand, the image of the number of pixels of the entire subject image is recorded on the recording medium, and when printing, the image data taken out from the recording medium is printed with the specified print size, so the user recognized it by looking at the screen There has been a problem that the image and the image at the time of printing may look different.

In order to solve the above-mentioned problems and to display the image taken with the printer with a printer at the print size at the time of reproduction and confirm it, it is possible to print it. There is a camera that makes it easy to grasp the actual size and prints an image of a desired print size (see, for example, Patent Document 3).
In addition, there is an image pickup apparatus that generates and records image data of a print size at the time of shooting, and displays an image corresponding to the print size that is output by displaying the image at the print size at the time of reproduction (for example, Patent Documents). 4).

  On the other hand, as a technique for preventing camera shake, there is a technique that detects a camera shake, outputs a warning display, etc., and prompts the user to hold the camera firmly. As such a camera, there are provided first determination means for determining that the output of the acceleration sensor is greater than a predetermined value, and second determination means for determining when the image signal has changed to a predetermined amount or more. There is a camera that issues a warning according to the determination result of the determination unit 2 (see, for example, Patent Document 5).

  In addition, an electronic still camera configured to save captured images at the time of the shutter operation, automatically acquire images before and after the shutter operation, and warn when camera shake is detected compared to the image at the time of the shutter operation. Yes (see, for example, Patent Document 6).

JP 2004-186948 A JP 2004-207813 A JP 2002-199311 A JP 2004-320111 A JP 2003-140219 A Japanese Patent No. 2870772

  Here, if you can display a through image based on a certain shape and size, such as the print size, regardless of the type of camera, it is convenient when shooting on the premise of printing the shooting target, There is no inconvenience that the apparent image quality at the time of shooting differs greatly from the image quality of the printed image. Also, large prints are easily affected by blurring, and small prints have little blurring effect. Therefore, you can display a print-through image and enlarge it, or detect the print blur tolerance and detection at the selected print size. From the comparison of blurring, it can be expected to be used for suppression of blurring and designation of a print size corresponding to the blurring.

  However, in the technique disclosed in Patent Document 1, when using an original image taken with a digital camera as a print image, a required image degree is calculated from the number of vertical and horizontal pixels calculated based on the total number of pixels and the aspect ratio of the digital camera. It is possible to calculate the maximum size of the print image that can be realized and display the calculation result, but only to display the maximum size of the print image, and display the captured image in the size of the print size or print It does not enable display in various print sizes by enlarging / reducing the size.

  The technique disclosed in the above-mentioned Patent Document 2 is that the photograph having a prescribed size that can be used is photographed, and the selected ID photo is selected by selecting the ID photo type and selecting the print size. The frame is displayed on the through image with a size corresponding to the selected print size, and the captured image can be displayed in the print size size, or the print size can be changed in various print sizes. It does not enable display.

  In the technologies disclosed in Patent Document 3 and Patent Document 4 described above, since the print size is displayed and confirmed when the captured image is reproduced, the image can be printed. There is an advantage that it is easy to grasp the size, but since the through image is not displayed in print size, the image quality that appears when shooting is different from the image quality of the printed image is recorded. Cannot be prevented. It cannot be used to suppress blurring during shooting or to specify a print size according to blurring.

  In the technique disclosed in Patent Document 5, a warning is displayed every time a shake of a predetermined amount or more is detected by the shake detection means, but the shake detection threshold is not related to the shake allowance related to the print size. The printing blur caused by the above cannot be within the allowable range of the printing blur.

  The technique disclosed in Patent Document 6 has an advantage in that if a camera shake occurs during a shutter operation, the camera shake is detected and a warning is given. Therefore, there is an advantage that reshooting can be performed on the spot, but a camera shake is detected and a warning is issued. Since the threshold value at this time is not related to the allowable amount of shake related to the print size, as in Patent Document 3, print blur caused by camera shake or the like cannot fall within the allowable range of print blur.

  SUMMARY An advantage of some aspects of the invention is that it provides an imaging apparatus, a display method, a program, and a storage medium that can display a captured image in a print size.

In order to solve the above-mentioned problem, in the invention described in claim 1, there is provided an image pickup apparatus including an image pickup unit and a monitor, and print size selection means for selecting one of a plurality of print sizes prepared in advance. , An image conversion unit that converts the image acquired by the imaging unit into an image having the same size as the print size selected by the print size selection unit, and the print size selection unit by the image conversion unit on a monitor. Provided is an image pickup apparatus provided with image display means for displaying an image converted to the same size as a selected print size.
As a result, the through image can be displayed in the selected print size, so you can check the print size by selecting the shooting target by looking at the through image when waiting for shooting, or the image and image quality in the size of the user's application on the through image. I can confirm.

In the present invention, the print size is display information defined by the paper size to be printed and the size of the image printed on the selected paper size, and the print size selection means is prepared in advance. Means for selecting a paper size from a plurality of print sizes, and means for selecting whether to print an image with the selected paper size or to print an image with the selected paper size. An imaging apparatus according to claim 1 is provided.
As a result, the through image can be displayed with the selected paper size image or the selected paper size, so that the through image can be confirmed by looking at the through image while waiting for shooting, or by checking the size of the image printed on the selected paper. The image and image quality can be confirmed with the size for the user's application.

Further, in the invention described in claim 3, the blur detection unit for detecting the blur, the blur amount detected by the blur detection unit, and the print blur allowable amount prepared for each of a plurality of print sizes in advance are compared. The imaging apparatus according to claim 1, further comprising: a blur amount comparing unit; and a warning output unit that outputs a warning based on a comparison result by the blur amount comparing unit.
As a result, a warning is issued if the detected blur exceeds the print blur tolerance compared to the print blur tolerance for the selected print size by detecting the blur during shooting, so the user can re-shake the camera shake. Since it is possible to shoot images by suppressing or changing the print size, it is possible to shoot images with little print blur.

According to a fourth aspect of the present invention, there is further provided a shake detection means, and provided with a shake notification means for informing an allowable print size prepared in advance based on the detected shake amount. An imaging apparatus according to claim 1 is provided.
Accordingly, blurring is detected at the time of shooting, and the allowable print size is notified to the user. Therefore, the user can change the print size to the notified print size and the like, and can print an image with less blur.

According to a fifth aspect of the present invention, in the image pickup apparatus according to the third aspect, the shake detection unit is set with a print blur allowable amount corresponding to the print size selected by the print size selection unit. I will provide a.
As a result, when a print size is selected, the print shake allowance corresponding to the print size is set as a shake detection threshold, making it easy to compare the shake detection result with the print shake allowance and process warning output, etc. Become.

Further, the invention according to claim 6 further includes a print information memory in which model information of a plurality of printers is associated with a print size that can be printed for each model, and the print size selection unit is stored in the print information memory. Printer selection means for selecting a printer based on a plurality of model information, and means for selecting a desired print size from among print sizes associated with the printer selected by the printer selection means, The image display device according to claim 1, wherein the image display unit displays the captured image in the same size as the size printed by the selected printer.
As a result, an image can be displayed with a print size and dot density that can be printed by the printer used by the user.

According to a seventh aspect of the present invention, there is provided a display method for an image pickup apparatus including an image pickup unit and a monitor, the step of selecting a plurality of print sizes prepared in advance for images picked up by the image pickup unit; A step of converting an image captured by the imaging unit into an image having the same size as the selected print size, and a step of displaying on the monitor the image converted to the same size as the selected print size And a display method characterized by comprising:
As a result, the through image can be displayed in the selected print size, so you can check the print size by selecting the shooting target by looking at the through image when waiting for shooting, or the image and image quality in the size of the user's application on the through image. I can confirm.

According to an eighth aspect of the present invention, there is provided an image blur confirmation display method in an image display device including an imaging unit and a monitor, the step of selecting an image print size, and the step of detecting an image blur amount. And a step of comparing the detected blur amount with a print blur tolerance prepared in advance for each of a plurality of print sizes and a step of outputting information based on the comparison result. Provide a method.
As a result, it is possible to output a warning when an image blur that exceeds the print blur allowable amount of an image displayed through at the print size at the time of shooting occurs, or to output information such as what print size does not cause a print misalignment. Therefore, the user can select whether to shoot based on such information or to change the print size. In addition, since an image with less print blur can be output, an image with less blur can be printed without checking the state of the image during reproduction as in the prior art.

According to a ninth aspect of the present invention, there is provided a program executable by a computer of an imaging apparatus including an imaging unit and a monitor, and a function for selecting a plurality of print sizes prepared in advance and acquired by the imaging unit A program that executes a function for converting a selected image into an image having the same size as the selected print size, and a function for through-displaying an image converted with the same size as the selected print size on a monitor. provide.
As a result, the imaging apparatus can display a through image in the print size selected by the user, so that the user can check the image to be photographed with the selected print size or can check the image and image quality with the size of the user's application. .

According to a tenth aspect of the present invention, there is provided a computer-readable storage medium characterized by storing a program for causing a computer to execute each step of the display method according to the seventh aspect.
As a result, when the program stored in the storage medium is executed, the image is displayed on the imaging device in the print size selected by the user, so that the user can confirm the shooting target with the selected print size or use it for the user's purpose. You can check the image and image quality at the size of.

According to an eleventh aspect of the present invention, there is provided a computer-readable storage medium storing a program for causing a computer to execute the steps of the image blur checking method according to the eighth aspect.
As a result, when the program stored in this storage medium is executed, a warning is issued if an image blur exceeding the print blur allowable amount of the image displayed through at the print size occurs at the time of shooting, and what the print size is Since it is possible to output information such as whether printing misalignment occurs, the user can select whether to shoot based on such information or to change the print size. In addition, since an image with less print blur can be output, an image with less blur can be printed without checking the state of the image during reproduction as in the prior art.

According to a twelfth aspect of the present invention, there is provided a computer-readable storage medium characterized by storing the program according to the ninth aspect.
As a result, by executing the program stored in the storage medium, the image can be displayed on the imaging apparatus in the print size selected by the user, so that the user can check the shooting target with the selected print size. The image and the image quality can be confirmed by the size for the user's use.

  According to the present invention, since a through image can be displayed at a selected print size, the through image can be checked at the time of shooting standby, and the shooting target can be confirmed with the selected print size, or an image can be displayed on the through image with a size for a user's use. You can check the image quality. In addition, a warning can be output when the print blur allowable amount is exceeded during shooting, and an allowable print size can be notified, so that an image with less blur can be printed.

In this embodiment, “print size” means a print size such as L plate, 2L plate, postcard size, A4, or B5. More specifically, there are a case where it means the size of “printing paper” and a case where it means “the size of an image to be printed”. When "L size ..." is specified as the "size of printing paper", if the image to be printed is small, many blank areas are printed and the L size ... is specified as the "size of the image to be printed". When the original image is small, it is enlarged by interpolation or the like, and when the original image is large, the original image is reduced by thinning or the like and printed at a specified size. That is, in this specification, “print size” is display information defined by the size of the printing paper and the size of the image printed on the printing paper.
On the other hand, the “display size” means the size of an image displayed on the liquid crystal monitor screen, and depends on the size of the liquid crystal pixels, the pixel pitch, and the number of pixels.
Accordingly, the size of the subject, the display size, and the print size are different. When the subject is displayed on the full 2 inch monitor screen and when the subject is displayed on the full 3 inch monitor screen, the display size of the 3 inch monitor screen is larger even for the same subject. Further, in order to display the same size as that displayed on the 3-inch monitor screen on the 2-inch monitor screen, the image is enlarged and displayed, and the portion protruding from the screen cannot be seen.
However, since the original image is the same whether it is displayed on a 2-inch monitor screen or a 3-inch monitor screen, it can be printed in L version, 2L version, etc. regardless of the display size. it can.
The relationship between the print size, the number of print dots of the printer, and the print pitch is unique to the printer and is not directly related to the camera. As described above, if the L plate is designated as the “size of the image to be printed”, printing control is performed so that it fits in the L plate. If “print paper size” is designated, the number of pixels of the image sent to the printer Depending on the print size will change. For example, the same 640 × 480 pixel image may be printed with different sizes depending on the printer.
In the present invention, in any case, it can be displayed on the monitor of the camera at the actual size actually printed. That is, an image of 2 cm on the printed paper can be displayed at 2 cm on the display screen of the monitor.

FIG. 1 is an external view of a digital camera as an embodiment of a camera according to the present invention. 1A is a front view of the digital camera 100, FIG. 1B is a configuration example of an imaging unit inside the camera, and FIG. 1C is a rear view.
In FIG. 1, a digital camera 100 includes a light receiving window 1 and a strobe light emitting unit 10 of a lens optical system on the front side as shown in FIG.

  As shown in FIG. 1B, the light incident from the light receiving window 1 of the lens optical system 12 is reflected by the electric mirror / gimbal portion 12-1 provided inside the camera and is incident on the lens group 12-2. An image is formed on a CCD (imaging device) 13 through a lens group 12-2.

  Further, on the back of the digital camera 100, as shown in FIG. 1C, keys such as a mode selection key 2, a cursor key 3, a set key 4, and a print size image display key 7 for switching modes, A liquid crystal monitor screen 5 and zoom keys 6 (6-1, 6-2) are provided. Also, a shutter key 8 and a power button 9 are provided on the upper surface, and a USB terminal connection portion used when connecting to an external device such as a personal computer (hereinafter referred to as a personal computer) or a modem with a USB cable, although not shown. Is provided. Furthermore, an optical transmission / reception port for near field communication such as infrared communication or Bluetooth, a radio communication antenna, or a GPS reception antenna may be provided on the front surface or the like.

  FIG. 2 is a diagram showing an embodiment of the electronic circuit configuration of the digital camera 100 of FIG. In FIG. 2, the digital camera 100 has an automatic focusing (autofocus (AF)) function in a photographing mode that is a basic mode, and a lens 11 that constitutes a photographing lens 2 and a motor 11 that moves a focusing position and an aperture position. System 12, CCD 13 as image sensor, timing generator (TG) 14, vertical driver 15, sample hold circuit (S / H) 16, A / D converter 17, color process circuit 18, DMA (Direct Memory Access) controller 19, DRAM interface (I / F) 20, DRAM 21, control unit 22, VRAM controller 23, VRAM 24, digital video encoder 25, display unit 26, JPEG circuit 27, memory card 28, built-in memory 29, key input unit 30, hand A shake detection unit 31 is provided. In FIG. 2, the lens optical system 12 to the color process circuit 18 correspond to an imaging unit in the present invention. In the first embodiment, the camera shake detection unit 31 may not be provided.

In the monitoring state in the shooting mode, the focus position and the aperture position are moved by driving the motor (M) 11, and the imaging element is arranged behind the shooting optical axis of the optical system 12 constituting the shooting lens 1. The CCD 13 is scanned and driven by a timing generator (TG) 14 and a vertical driver 15, and outputs a photoelectric conversion output corresponding to a light image formed at regular intervals for one screen.
The CCD 13 is a solid-state imaging device that captures a two-dimensional image of a subject, and typically captures an image of several tens of frames per second. The imaging element is not limited to a CCD, and may be a solid-state imaging device such as a CMOS (Complementary Metal Oxide Semiconductor).

  The photoelectric conversion output is appropriately gain-adjusted for each primary color component of RGB in the state of an analog value signal, sampled and held by a sample hold circuit (S / H) 16, and digital data by an A / D converter 17. The color process circuit 18 performs color process processing including image interpolation processing and γ correction processing in the color process circuit 18 to generate a digital luminance signal Y and color difference signals Cb and Cr, and a DMA (Direct Memory Access) controller 19. Is output.

  The DMA controller 19 uses the luminance signal Y and the color difference signals Cb and Cr output from the color process circuit 18 once by using the composite synchronization signal, the memory write enable signal, and the clock signal from the color process circuit 18 once. DMA transfer is performed to the DRAM 21 used as a buffer memory via the interface (I / F) 20.

  The control unit 22 includes a CPU, a program storage memory such as a flash memory in which an operation program executed by the CPU including processing for image display at a print size and blur detection as will be described later is stored, and a work memory The digital camera 100 controls the entire digital camera 100. After the DMA transfer of the luminance and color difference signals to the DRAM 21, the luminance and color difference signals are transmitted via the DRMA interface 20. The data is read from the DRAM 21, the number of pixels is thinned out so as to match the size of the display image, and then written into the VRAM 24 via the VRAM controller 23.

  When “print size image display” is selected in the shooting mode, the control unit 22 switches the through image display from the size defined by the size of the liquid crystal monitor 5 to the size display based on the print size. The control unit 22 performs execution control such as warning display and various notification displays based on the camera shake detection value.

  The control unit 22 also extracts a processing program and menu data corresponding to each mode stored in a program storage memory such as a flash memory in response to the status signal from the key input unit 30, and In addition to performing execution control of other functions, for example, execution of imaging and playback of recorded images, etc., display of a function selection menu at the time of function selection, selection function menu specified by cursor key 3 or the like and determination of image selection Control.

  The digital video encoder 25 periodically reads the luminance and color difference signals from the VRAM 24 via the VRAM controller 23, generates a video signal based on these data, and outputs the video signal to the display unit 26.

As described above, the display unit 26 functions as a monitor display unit (electronic finder) in the shooting mode. By performing display based on the video signal from the digital video encoder 25, the display unit 26 receives from the VRAM controller 23 at that time. An image based on the stored image information is displayed on the liquid crystal monitor 5 in real time.
In this way, in the display state of a so-called through image in which the image at that time is displayed in real time on the display unit 26 as a monitor image, the shutter key 8 (see FIG. When 1) is operated, a trigger signal (imaging instruction signal) is generated.

  In response to this trigger signal, the control unit 22 immediately stops the path from the CCD 13 to the DRAM 21 after the DMA transfer of the luminance and color difference signals for one frame currently taken in from the CCD 13 to the DRAM 21 in response to the trigger signal. Transition to saved state.

In this stored recording state, the control unit 22 transmits the luminance and color difference signals for one frame written in the DRAM 21 through the DRAM interface 20 to each of Y, Cb, and Cr components of 8 pixels × 8 pixels horizontally. Are read in units called basic blocks and written into a JPEG (Joint Photograph Cording Experts Group) circuit 27. The JPEG circuit 27 uses ADCT (Adaptive Discrete Cosine Transform), a Huffman code which is an entropy coding system. Data compression is performed by processing such as conversion.
The obtained code data is read out from the JPEG circuit 27 as a data file of one image, and is recorded and stored in either the memory card 28 or the built-in memory 29 that is detachably mounted as a recording medium of the digital camera 100.
Then, along with the compression processing of the luminance and color difference signals for one frame and the completion of writing all the compressed data to the memory card 28 or the built-in memory 29, the control unit 22 activates the path from the CCD 13 to the DRAM 21 again.

  In the playback mode, which is the basic mode, the control unit 22 selectively reads out the image data recorded in the memory card 28 or the built-in memory 29, and is completely opposite to the procedure in which the data is compressed in the image shooting mode by the JPEG circuit 27. The image data compressed in the procedure is expanded, the expanded image data is expanded and stored in the VRAM 24 via the VRAM controller 23, and is periodically read out from the VRAM 24. A signal is generated and reproduced by the display unit 26.

The JPEG circuit 27 supports a plurality of compression ratios, and a mode for storing data corresponding to the compression ratio includes a mode corresponding to a high resolution (generally called high definition, fine, normal, etc.) with a low compression ratio. There is a low-resolution (commonly called economy) mode with a high compression rate.
It also supports high to low pixel counts. For example, there are pixel sizes called SXGA (1600 × 1200), XGA (1024 × 786), SVGA (800 × 600), VGA (640 × 480) and the like.

  The key input unit 30 includes the mode selection key 2, the cursor key 3, the set key 4, the zoom key 6 (6-1, 6-2), the print size image display key 7, the shutter key 8, and the power button 9 described above. The signals accompanying the key operations are directly sent to the control unit 22.

  The mode selection key 2 includes a slide key in the illustrated example, and performs selection of a shooting mode that is a basic mode and a moving image shooting mode that is a lower mode, and a playback mode and a moving image playback mode that is a lower mode thereof. Can do. Note that selection of various shooting modes and playback modes such as movie shooting and movie playback may be performed by providing a dedicated key.

  The cursor key 3 is normally used for a cursor movement operation performed when selecting a menu. The set key 4 is normally used when confirming the point result with the cursor key 3 or confirming the set value. When the set key 4 is pressed, the point result with the cursor key 3 is confirmed and the process designated by the cursor is started. Is done.

  The zoom key 6 is used for zoom operation. In the case of optical zoom, the zoom lens (variable focal length lens) is moved to the wide side or the tele side in response to the operation of the zoom key 6 (W button 6-1 or T button 6-2). The zoom value is determined, the angle of view actually changes following the change of the zoom value, and a wide (wide angle) image or a tele (telephoto) image is displayed on the liquid crystal monitor screen 5. In the case of digital zoom, the zoom value is determined in response to the operation of the zoom keys 6-1 and 6-2, but the actual angle of view does not change, and an image having a size corresponding to the zoom value is displayed on the LCD monitor screen 4. Trimmed and displayed. When “print size image display” is selected, an image to be displayed is enlarged / reduced according to the operation of the zoom keys 6-1 and 6-2.

  When the print size image display key 7 is pressed, “print size image display” is selected. In the present embodiment, the key 7 is used as a print size image display key. However, the “print size image display” mode is one of the options by the mode selection key 2 without providing a dedicated key like the key 7. Alternatively, a function as a print size image display key may be assigned to another key.

When the shutter key 8 is fully pressed and released, a trigger signal (imaging instruction signal) is output. In addition, the camera shake detection unit 31 calculates a blur amount of the image in the comparison target area of the images before and after the shooting before the shooting instruction (in the embodiment, the shutter key 8 is fully pressed). In this case, the camera shake detection unit 31 may be configured as a one-chip microcomputer that realizes such a camera shake detection function. Alternatively, a subprogram for realizing the function of acquiring the blur amount may be included as one module and stored in the program storage memory.
Further, as the camera shake detection unit 31, a known small azimuth and vibration detection device may be used. Such an azimuth and vibration detection device detects camera shake (blur amount, camera shake direction) by detecting shakes (pitch, yaw, roll) of the top, bottom, left, and right of the digital camera 100 at the time of shooting and converting them into digital signals. A signal is sent to the control unit 22. As the azimuth and vibration detection device, for example, two to three angular velocity sensors / vibration gyros can be used.
The camera shake detection unit 31 is configured as a camera shake calculation device including a small azimuth and vibration detection device and a one-chip microcomputer, and controls camera shake component information (pitch, yaw, roll information) of the calculated camera body. You may make it send to the part 22. FIG.
The camera shake detection unit 31 may be a small and inexpensive device that can detect only vibration (amount of shake).

(Embodiment 1)
In this embodiment, the digital camera 100 is configured so that “print size image display” can be selected, and the print size (that is, the size of the printing paper or the size of the image to be printed) is selected in “print size image display”. Then, the size of the through-displayed image is switched from the size based on the display image to the designated print size (the size of the printing paper or the size of the image to be printed). In other words, a print size image is displayed on the liquid crystal monitor 5. Therefore, when printing an image having a large print size such as A4 size is assumed, the image displayed on the display screen is a part of the entire subject image. That is, a part of the entire subject image is enlarged and displayed.

  FIG. 3 is an explanatory diagram of print size image display according to the present embodiment, FIG. 3A is a display example according to the screen size of the liquid crystal screen 5 as in the prior art, and FIG. FIG. 3C is a display example of an image printed on the size of the printing paper of the plate, and FIG. 3C is a display example of the image size printed on the printing paper of the L plate. FIG. 3D shows an example in which the relationship between the image and the entire image displayed at the image size printed on the printing paper is displayed. In FIG. 3, reference numeral 51 is a display image of a liquid crystal screen size, reference numeral 52 is a display image of an L-size printing paper size, reference numeral 53 is a display image of an image size printed on an L-size printing paper, and reference numeral 54 is an L-size printing image. An image printed on the printing paper and displayed in the image size, the reference numeral 56 indicates which part of the entire image 55 the display image 57 (in this example, the image printed on the size of the L-size printing paper) displays. It is a frame. Although the display image 56 is centered on the focus area at the time of shooting, the display area of the display image 57 can be moved by moving the frame 56 by operating the cursor key 3 or the like.

When a through image 51 (FIG. 3A) having an image size based on the size of the liquid crystal monitor screen 5 is displayed in the shooting mode, the user presses the print image display key 7 to print size (printing paper size or printed size). Image size), an image of the selected print size is displayed. For example, when the display based on the printing paper size of the L plate is selected, an image as shown in FIG. 3B is displayed. Further, when the display based on the size of the image printed on the L-size printing paper is selected, an image as shown in FIG. 3C is displayed.
As a result, the user can confirm the subject to be photographed with the size of “printing paper size” or “size of image to be printed”, so that the image and image quality can be confirmed with the size for the user's application. Also, when printing large, as shown in FIG. 7A, it is easy to be affected by blur, and when printing small, there is little influence of blur as shown in FIG. 7B, so the zoom key 6-1 is pressed to enlarge the image. The presence or absence of blur can be seen on the spot.

  FIG. 4 is a flowchart showing an image display and recording operation example of the digital camera according to the present embodiment. The processing shown below is basically executed by the control unit 22 in accordance with a program stored in advance in a program memory such as a flash memory. An example in which the present invention is applied to the digital camera 100 shown in FIGS. 1 and 2 will be described below.

  In the flowchart of FIG. 4, an example is described in which execution is performed according to a program stored in advance in a program memory such as a flash memory. However, it is not necessary to store all functions in the program memory. It may be realized by receiving all via a network.

  In the shooting mode, the user can press the print size image display key 7 at any time during shooting standby to display a through image of the print size. Therefore, the control unit 22 checks the signal from the key input unit 30 and displays the print size image. If the key 7 is pressed, the process proceeds to step S2, and if not, the process proceeds to step S13 (step S1).

  When the print size image display key 7 is pressed, the control unit 22 displays the print size selection screen 160 (see FIG. 16) and selects the print size (that is, the size of the print paper or the size of the image to be printed). When the user selects a print size, the number of print dots corresponding to the print size selected from the display size conversion table 40 (FIG. 5) is displayed in order to display an image of the selected print size (step S2). ai × bi or ci × di (i is the number of rows in the table 50)) (step S3), AE processing is executed at the focal length corresponding to the zoom value at that time, and image data (entire subject) is obtained from the CCD 13. The color process circuit 18 adjusts the white balance corresponding to the color of the light source by automatic white balance (AWB) processing. , The image data from the CCD 13 is thinned out, and the VRAM 24 is rewritten with the video through image data based on the number of print dots acquired in the above step S3, and the image of the print size selected on the liquid crystal monitor 5 of the display unit 26 is displayed. Through display. When a large print size such as A4 size is selected, the image displayed on the liquid crystal monitor 5 is a part of the entire subject image. That is, a part of the entire subject image (A4 size part centered on the focus area) is enlarged and displayed in the display area size corresponding to the screen size of the liquid crystal monitor 5 (step S4).

  The user can switch to another print size by operating the cursor key 3. For example, when the user performs an upward ↑ operation on the cursor key 3, an image having a print size larger than the currently displayed image is sequentially displayed. Since the size images are sequentially displayed and switched to the print size image at the time when the cursor operation is stopped, the control unit 22 examines the signal from the key input unit 30, and if the cursor key is operated, the process proceeds to step S6. If not operated, the process proceeds to step S9 (step S4).

  When the cursor key 3 is operated, the control unit 22 superimposes a paper size name of a print size larger than the currently displayed image on the through image when the user performs an upward ↑ operation of the cursor key 3. When the cursor key 3 is pressed down ↓, the paper size name of the print size larger than the currently displayed image is displayed over the through image, and the paper size when the cursor operation is stopped is changed. The subsequent paper size is set (step S6).

  Then, in order to display the image of the changed print size, the number of print dots corresponding to the changed print size is extracted from the display size conversion table 40 as shown in FIG. 5 (step S6), and the zoom value at that time The color process circuit 18 executes AE processing at a focal length corresponding to, obtains image data (entire image data of the subject) from the CCD 13 and achieves white balance corresponding to the color of the light source by automatic white balance (AWB) processing. After the image data from the CCD 13 is thinned out after adjustment in step V6, the VRAM 24 is rewritten with the video through image data based on the number of dots extracted in step S6, and the changed print size is displayed on the liquid crystal monitor 5 of the display unit 26. Is displayed through (step S8).

  Next, since the user can operate the zoom key 6 (keys 6-1, 6-2) to enlarge / reduce the image, the control unit 22 examines a signal from the key input unit 30, and when the zoom key 6 is operated. Proceeds to step S10, otherwise proceeds to step S11 (step S9).

  When the zoom key 6 is operated, the control unit 22 enlarges / reduces the print size image according to the operation of the zoom key 6 and displays it through (step S10).

  Next, the control unit 22 performs an automatic focusing (AF) process so as to focus on a predetermined focus area (step S11). If the shutter key 8 is fully pressed, the process proceeds to step S17. Returns to step S3 (step S12).

  If the print size image display key 7 is not pressed, AE processing is executed at the focal length corresponding to the zoom value at that time, image data (entire image data of the subject) is obtained from the CCD 13, and automatic white balance (AWB) is obtained. ) After adjusting the color process circuit 18 so that the white balance corresponding to the color of the light source is obtained by processing, the image data from the CCD 13 is thinned out, and the VRAM 24 is rewritten with the video through image data based on the size of the liquid crystal monitor 5 Then, a print size image is displayed through on the liquid crystal monitor 5 of the display unit 26 (step S13).

  The control unit 22 checks whether or not the zoom operation using the zoom key 6 has been performed based on the signal from the key input unit 30. If the zoom operation has been performed, the process proceeds to step S15. If not, the process proceeds to step S16. Proceed (step S14). When the zoom operation is performed in step S13, a zoom value corresponding to the zoom operation is acquired, and the zoom zoom lens is moved based on the zoom value, thereby changing the optical zoom magnification and holding the zoom value in the RAM (overwriting). And the process proceeds to step S16 (step S15).

  Next, the control unit 22 performs an automatic focusing (AF) process so as to focus on a predetermined focus area (step S16). If the shutter key 8 is fully pressed, the process proceeds to step S18. Returns to step S1 (step S17).

  When the shutter key 8 is fully pressed, the control unit 22 immediately transfers the image data for one screen captured from the CCD 13 at the time when the shutter key 8 is fully pressed to the DRAM 21 immediately after completion of the DMA transfer to the DRAM 21. The path to the DRAM 21 is stopped, and the image data stored in the DRAM 21 is subjected to compression processing by the photographing JPEG circuit 27 at the time when the shutter key 8 is fully pressed, and is converted into an image file (compressed image data). Recording is performed in a recording memory such as the built-in memory 29) (step S18).

  In the flowchart of FIG. 4, the print size is selected in step S2. However, the display size conversion table 40 sets the print size of the image displayed first in step S2 as a predetermined print size (for example, L plate). Alternatively, the number of print dots (ax × by) corresponding to a predetermined print size may be taken out, and an image of the print size may be displayed through in step S3.

In the flowchart of FIG. 4, when the print size image display key 7 is pressed in step S1, the print size is selected in step S2, and the image of the print size selected or changed in step S4 is displayed. There are various types of printers capable of printing an image recorded on a recording medium such as the card 28 or the built-in memory 29, and the printable paper size differs depending on the type of printer. Therefore, a printer model table as shown in FIG. 70 is prepared in a memory or the like. When the print size image display key 7 is pressed in step S1, the printer name is displayed to prompt the user to select a printer. When the user selects a printer, the printer selected in step S2 is displayed. A list of print size selection screens is displayed, and the display size associated with the printer selected in step S3 is displayed. Printing corresponding to a predetermined print size (for example, the print size stored at the beginning of the display size conversion table 40) from the conversion table (see FIG. 5) for each printer model. The number of dots may be taken out, and the image of the predetermined print size may be displayed through on the liquid crystal monitor 5 of the display unit 26 in step S3.
In this way, the image can be displayed in a print size that can be printed by the printer used by the user, so that the image can be confirmed in various print sizes that can be printed by the printer.

  FIG. 5 is a diagram showing an embodiment of a display size conversion table used for displaying a print size image. Reference numeral 40 denotes a display size conversion table which is registered in the memory in advance or stored as a table constant of a program. Yes, reference numeral 41 is a type code storage field that stores a code indicating the type of print size, and reference numeral 42 is a dot number storage field that stores the number of print dots (= number of display pixels) corresponding to each print size. The storage field 42 stores the printing paper size dot number field 42-1 that stores the number of dots (ai × bi) when printing at the size of the printing paper and the number of dots (ci × di) when printing at the image size. It consists of an image size dot number column 42-2. Reference numeral 43 denotes a name storage field that stores a print size name (character code) used when displaying the print size.

  When the user selects “print paper size” after selecting the print paper name and print paper type on the print size selection screen 160 (see FIG. 16) displayed in step S2 of FIG. 4, the display size conversion table 40 is displayed. The number of dots (ai × bi) stored in the printing paper size dot number field 42-1 corresponding to the selected printing paper type is taken out, and the image size is selected when “Display with image size to print” is selected. The number of dots (ci × di) stored in the dot number column 42-2 is extracted.

  FIG. 6 is a diagram showing an embodiment of the printer model table. Reference numeral 70 is a printer model table registered in advance in a memory or stored as a program table constant. Reference numeral 71 is a printer name (or model). The stored printer name field, reference numeral 72 is a pointer field that stores the start address of the display size conversion table 40 (see FIG. 5) associated with the printer. In this case, as many display size conversion tables 40 as the number of printers stored in the printer name column 71 are stored in the memory or stored as program table constants. Each display size conversion table includes an ID conversion table shown in FIG. Similarly to 40, the print size code, the number of print dots corresponding to each print size, and the print size name are registered.

<Modification of Embodiment 1>
In the present embodiment, the print size is set as the display size. However, in order to determine blur, the display size is selected or designated in step S2, and an image of the selected size is displayed in the through display. Good. For example, the step S1 in FIG. 4 is “in shooting mode, the user can press the selection / designated size image display key 7 at any time during shooting standby to display a through image of the selected or designated size. If the signal from the key input unit 30 is checked and the user presses the selection / designated size image display key 7, the process proceeds to step S2. Otherwise, the process proceeds to step S13. If the key 7 is pressed, the size selection screen is displayed to prompt the user to select or specify the display size. Step S3 is “If the display size is selected or specified, an image of the selected or specified size is displayed. In order to display, the number of pixels to be displayed (Px × Qy) is calculated based on the designated size ”, and step S4 is set to“ zoom at that time ” The color process circuit 18 executes AE processing at a focal length corresponding to, obtains image data (entire image data of the subject) from the CCD 13 and achieves white balance corresponding to the color of the light source by automatic white balance (AWB) processing. Then, the image data from the CCD 13 is thinned out and the VRAM 24 is rewritten with the video through image data based on the number of pixels calculated in the above step S3, and an image of a specified size is displayed on the liquid crystal monitor 5 of the display unit 26. “Display”. In this case, steps S5 to S8 are not necessary.

(Embodiment 2)
In this embodiment, the camera shake detection unit 31 shown in FIG. 2 acquires the blur amount of the image before and after being captured before the shooting instruction, and the print blur allowed when the blur amount is printed on the selected printing paper. An example will be described in which a warning is output when the allowable amount is exceeded and the user is notified of the print size within which the blur is within the allowable range.

  FIG. 7 is an explanatory diagram showing the difference in print blur due to the size of the print size. FIG. 7A is a diagram showing the blur when the enlarged image 61 is printed. It turns out that it is easy to receive the influence of blur like blur 62-63. As shown in FIG. 7B, it can be seen that the effect of blurring is small as in blurs 66 and 67 when printing is small. 14 is compared with the shake amount of the photographed image based on the print shake allowance table 90 (FIG. 14) in which the print shake allowance when the image is displayed with the print size as shown in FIG. 14 is associated with each print size. Warning or notification.

FIG. 8 is an explanatory diagram of an image blur detection method, and is a diagram schematically showing a state in which blur occurs in the subject image A of the current frame and the subject image B of the previous frame at a certain point in time.
The blur amount is detected by cutting out image data of the evaluation area (line C in the example of FIG. 8) from a new subject image (current frame) acquired for each frame while displaying a through image, and immediately preceding the subject image (previous frame). ) By calculating the amount of correlation with the image data of the evaluation area.

In the example of FIG. 8, the image blur amount is obtained by obtaining the pixel data of the evaluation area as a line C for one line, the image signal of the subject image A as f (n), and the image signal of the subject image B as g. As (n), the correlation amount Rfg for the sections a to b of the line C can be calculated and calculated based on a correlation equation such as the following equation (1).

FIG. 9 is an explanatory diagram of a shake amount detection area, and shows an example in which the focus area is a shake amount detection area. In the description of FIG. 8 above, since the correlation amount is calculated using one line C in the sections a and b larger than the subject image as the blur amount detection region (evaluation region), the subject's head and limbs move as shown in FIG. In this case, blurring is detected. In this case, image blur due to camera shake and image blur due to movement of the subject are also detected as blur.
Therefore, as shown in the figure, a portion that does not affect the movement of the heads and limbs of the subjects 81 and 82, for example, a rectangle surrounded by focus areas (sections α to β and lines i to j (number of lines = m)). When the image portion corresponding to (part) 83 is set as the blur amount detection region, only the approximate blur amount can be acquired based on the accumulated correlation amount by repeating the calculation according to the above equation (1) for m lines.

FIG. 10 is a flowchart showing an example of blur detection and warning operation when a print size image is displayed by the digital camera according to the present embodiment. FIG. 11 is a flowchart when the image of the LCD monitor screen size of the digital camera according to the present embodiment is displayed. It is a flowchart which shows an example of a detection and warning operation | movement. 10 and 11, the operations of steps S1 to S10, steps S12 to S15, steps S17 and S18 are the same as the operations of steps S1 to S10, steps S12 to S15, steps S17 and S18 in the flowchart of FIG.
FIG. 10 shows an example of a blur detection and warning processing operation at the time of displaying a print size image that operates in parallel with the automatic focusing (AF) process in step S11 of the flowchart of FIG. 4, and FIG. An example of motion detection and warning processing during print size image display that operates in parallel with the focus (AF) processing is shown. Further, the program realizing the parallel processing shown in FIGS. 10 and 11 is included as a subprogram of the program realizing the operation shown in the flowchart of FIG.

"Blur determination operation by print size"
In FIG. 10, when there is a transition from step S9 or step S10 in the flowchart of FIG. 4, the control unit 22 performs the following steps T1 to T5 in parallel with the automatic focusing (AF) process of step S11 of FIG. Execute. Hereinafter, description will be made based on FIGS. 1, 2, 4, 8, and 10.

  10, when there is a transition from step S9 or step S10 in the flowchart of FIG. 4, the control unit 22 captures image data (the subject image of the current frame) taken into the DRAM 21 from the imaging unit configured by the optical system 12 to the color process circuit 18. ) Of the focus area (part indicated by reference numeral 83 in FIG. 9) (step T1), and the focus area clipped from the clipped subject image of the current frame and the subject image of the previous frame stored in the DRAM 21. The cumulative correlation amount for m lines in the interval α to β with the image is calculated by an arithmetic program based on the correlation equation as shown in the above-described equation (1) to obtain the blur amount (FIGS. 9 and 9). 12) (step T2).

  Next, the control unit 22 extracts the print blur allowable amount corresponding to the print size from the print blur allowable amount table 90 as shown in FIG. 14 (step T3), and prints the blur amount acquired in step T2 and the step T3. The print shake allowance taken out from the shake allowance table 90 is compared. If the shake amount exceeds the print shake allowance, the process proceeds to step T5. If the shake amount is less than the print shake allowance, the process proceeds to step S12 in FIG. Proceed (step T4).

  When the amount of blur exceeds the allowable amount of print blur, the control unit 22 displays a warning message on the display unit 26 (for example, “The image is blurring larger than the allowable blur range at the time of printing. Please display ", prompt the user to suppress camera shake or change the print size, and proceed to step S12 in FIG. 4 (step T5).

  The print size can be used as the shake warning method by the operation shown in the flowchart of FIG. Also, the larger print size has a smaller image size than the smaller print size (for example, the image size of the L plate is smaller for B4 size paper and L size image). Although the image blur is determined at the same magnification, since the size of the image to be printed is smaller than the image of the B4 size in the L size, the print blur allowable amount α1 of the image of the L size is determined in the misalignment determination. It may be lower than the print blur allowable amount α6 of the B4 size (that is, the allowable amount α1 <α6). In addition, because there is a blur judgment criterion (print blur tolerance) at the print size, the image quality is stable if the blur at the print size selected by the user is within the tolerance, so you can shoot with peace of mind. And images can be recorded. Therefore, it is possible to reduce the trouble of taking a preliminary image as before and using the one having the better image quality for printing, so that the usability at the time of shooting is improved.

  In the flowchart of FIG. 10 described above, the print shake allowance corresponding to the print size selected from the print shake allowance table 90 is acquired in step T3, and compared with the shake detection value (shake amount) in step T3. However, when the print size is selected in step S2 of FIG. 4, the print blur allowable amount corresponding to the selected print size is acquired from the print blur allowable amount table 90 and set as a threshold value at the time of blur detection. Also good. In this way, step T3 can be omitted, and the motion detection operation shown in FIG. 11 is sufficient, so that the motion detection subprogram can be shared.

"Normal blur detection"
11, when there is a transition from step S14 or step S15 in the flowchart of FIG. 4, the control unit 22 captures the image data (the subject image of the current frame) taken into the DRAM 21 from the imaging unit constituted by the optical system 12 to the color process circuit 18. ) Of the focus area (step U1), and m lines in the sections α to β between the clipped image of the subject image of the current frame and the image of the focus area extracted from the subject image of the previous frame stored in the DRAM 21. The accumulated correlation amount of the minute is calculated by an arithmetic program based on the correlation equation as shown in the above-described equation (1) to acquire the blur amount (step U2).

  Next, the control unit 22 compares the blur amount acquired in step U2 with a predetermined threshold value. If the blur amount exceeds the threshold allowable amount, the process proceeds to step U4. If the blur amount is equal to or less than the threshold value, the control unit 22 in FIG. The process proceeds to step S17 (step U3).

  When the shake amount exceeds the threshold value, the control unit 22 displays a warning message (for example, “The image is blurred. Please reset the camera”) on the display unit 26 to prompt the user to suppress camera shake. The process proceeds to step S17 in FIG. 4 (step U4).

"Blur amount calculation operation"
FIG. 12 is a flowchart showing the operation of the subprogram showing details of the blur amount calculation operation by the blur detection unit 31 in step T2 of FIG. 10, and shows the line counter L and the focus as the blur amount detection area of the current frame and the previous frame. It is assumed that a cumulative correlation area for accumulating area correlation amounts is secured in the DRAM 21. Also, the blur amount calculation operation by the blur detection unit 31 in step U2 in FIG. 11 is the same as that in the flowchart in FIG. 12 (in FIG. 11, steps U2-1 to U2-6 are shown in parentheses). As in the case of FIG. 10, it is assumed that the line counter L and a cumulative correlation area for accumulating the correlation amount of the focus area as the blur amount detection area of the current frame and the previous frame are secured in the DRAM 21.

  In FIG. 12, an image of the focus area (portion 83 in the example of FIG. 9) of the subject image of the current frame cut out in step T1 of FIG. 10 and an image of the focus area portion of the subject image of the previous frame are m lines (m = Line number j−i) × (length of β−α), the control unit 22 sets the value of the line counter L to i, the accumulated correlation amount area to 0 (step T2-1), and the focus area. Pixel data of the line segments α to β indicated by the value of the line counter L of P is acquired (T2-2), and the focus area image of the subject image of the current frame and the focus area 83 of the subject image of the previous frame are acquired. The correlation amount of the image is calculated by an arithmetic program based on the correlation equation as shown in the equation (1) and added to the cumulative correlation amount area (step T2-3), and the line counter L is set to 1. For example was the result is greater than j the process proceeds to step T5-2, otherwise the flow returns to step T2-2 (step T2-4).

  The cumulative correlation amount is compared with the upper limit threshold value. When the cumulative correlation amount is less than or equal to the upper limit threshold value, the process proceeds to step T3 in FIG. 10 (or step U3 in FIG. 11). The process proceeds to step T2-6 as a correlation amount calculated by replacing the accumulated correlation amount with an upper limit threshold as a shake due to a cause (for example, camera movement or subject movement) (step T2-5). Based on the accumulated correlation amount calculated (or replaced) in step T2-4, the camera shake amount is acquired, and the process proceeds to step T3 in FIG. 10 (or step U3 in FIG. 11) (step T2-6).

In the description of the flowcharts of FIGS. 10 and 11, the rectangle of the focus area is used as the camera shake amount detection area, but the camera shake amount detection area is not limited to the rectangle of the focus area. For example, a predetermined one line in the rectangle of the focus area may be used as the camera shake amount detection area, and a portion other than the focus area may be used as the camera shake amount detection area. In addition, after the contours of the preceding and following images are extracted by the camera shake detection unit 31, the camera shake amount may be calculated from the contour difference by the same operation as the flowchart of FIG.
In addition, the warning display is made when the print blur allowable amount of the print size is exceeded, but instead, a warning message may be output by voice, a warning sound may be output, or a warning lamp may be displayed. .

  Further, in the description of the flowcharts of FIGS. 10 and 11, the blur detection unit 31 detects the blur of the previous and subsequent images in the camera shake amount detection region such as the focus area. As the azimuth and vibration detection device, the vibration may be detected by such a vibration detection device.

<Modification of Embodiment 2>
In the second embodiment, a warning is issued when an image blur that exceeds the print blur tolerance of an image displayed in the print size occurs. However, up to what print size at the time of shooting is assumed on the assumption that the shot image is printed. It is possible to determine whether printing is possible without feeling the image, and display the print size at the time of shooting to further improve the usability.

  FIG. 13 is a flowchart showing a variation of the blur detection and warning operation depending on the print size of the digital camera according to the present embodiment, and the operations in steps T1 to T3 are the same as those in steps T1 to T3 in the flowchart shown in FIG. .

  In FIG. 13, the control unit 22 compares the shake amount acquired in step T2 of FIG. 12 with the print shake allowance extracted from the print shake allowance table 90 in step T3, and the shake amount exceeds the print shake allowance. If this is the case, the process proceeds to step T5, and if the shake amount is less than the allowable amount, the process proceeds to step T7 (step T4).

  When the blur amount exceeds the print blur allowable amount, the print blur allowable amount table 90 is searched, and the print blur allowable amount corresponding to the print size one level higher than the print sizes stored in the print size storage column 91 is determined. Take out (step T5), compare the shake amount acquired in step T2 with the print shake allowance taken out from the print shake allowance table 90 in step T3, and if the shake amount exceeds the print shake allowance, return to step T5 If the blur amount is equal to or less than the print blur allowable amount, the process proceeds to step T7 (step T6).

  When the blur amount is equal to or less than the print blur allowable amount, the control unit 22 displays the print size name of the print blur allowable amount currently being compared as shown in FIG. 15 on a part of the LCD monitor screen 5 as a printable size. Then, the process proceeds to step S12 in FIG. 4 (step T7).

  FIG. 14 is a diagram showing an embodiment of a print blur tolerance table. Reference numeral 90 is a print blur tolerance table registered in advance in a memory or stored as a table constant of a program. Reference numeral 91 is a type of print size. Is a type code storage field that stores a code indicating, a reference numeral 92 is a print blur tolerance storage field that stores a print blur tolerance according to each paper size, and a reference numeral 93 is a print size name (characters) used to display the print size. Code name) is stored in the name storage column. Note that “MAX” in the last line of the type code storage column 91 in the print shake allowance table 90 indicates a case where there is no corresponding when the print shake allowance table 90 is searched in step T6 of the flowchart of FIG. In this case, “print size not applicable” is displayed in step T7.

FIG. 15 is a diagram showing an example of a through image in which the printable size is displayed on a part of the screen in step 12 of the flowchart of FIG. 13, and symbol 141 is a through image displayed in the print size, symbols 142 and 143. Is a blur, symbols 144-1, 144-2, 144-3,..., And 145 are displayed print size names.
FIG. 15A shows an example in which all printable sizes 144-1, 144-2, 144-3 are displayed. In this example, “A5” blinked by reference numeral 144-3 is the maximum. Is a printable size. Further, the example of FIG. 15B is an example in which only the maximum printable size name 145 is blinked and displayed. There are various display methods of printable sizes, and the display examples are not limited to these display examples.

  FIG. 16 is a diagram showing an embodiment of a print size selection screen. The print size selection screen 160 is a print paper size column 161 for selecting a print paper size and a display method selection column for selecting a display method on the liquid crystal monitor 5. 162, the user selects one of the print paper sizes displayed in the print paper size column 161 by operating the cursor key 3 or the like in step S2 of FIG. When either “display with print paper size” or “display with print image size” is selected and a confirmation key (for example, set key 4) is pressed, the print size is selected.

  As mentioned above, although several Example of this invention was described, it cannot be overemphasized that this invention is not limited to said each Example, A various deformation | transformation implementation is possible. For example, the term imaging device includes not only an electronic camera such as a digital camera but also a silver salt camera, a mobile phone with a camera, and a mobile information device with a camera.

1 is an external view of a digital camera as an embodiment of a camera according to the present invention. It is a figure which shows one Example of the electronic circuit structure of the digital camera of FIG. FIG. 6 is an explanatory diagram of print size image display according to the first embodiment. 3 is a flowchart illustrating an example of image display and photographing operation of the digital camera according to the first embodiment. It is a figure which shows one Example of a display size conversion table. FIG. 6 is a diagram illustrating an example of a printer model table. It is explanatory drawing which shows the difference in the printing blur by the magnitude | size of printing size. It is explanatory drawing of the blur detection method of an image. It is explanatory drawing of the blur detection area | region. 10 is a flowchart illustrating an example of a blur detection and warning operation when a print size image is displayed by the digital camera according to the second embodiment. 10 is a flowchart illustrating an example of motion detection and warning operation when an image of a liquid crystal monitor screen size of the digital camera according to the second embodiment is displayed. 12 is a flowchart showing an operation of a subprogram showing details of a shake amount calculation operation in the flowcharts of FIGS. 10 and 11. 10 is a flowchart illustrating a variation example of shake detection and warning operation based on the print size of the digital camera according to the second embodiment. It is a figure which shows one Example of a printing blurring tolerance table. It is a figure which shows the example of the through image which displayed the printable size on a part of screen. FIG. 10 is a diagram illustrating an example of a print size selection screen.

Explanation of symbols

3 Cursor keys (print size selection means)
5 LCD monitor (monitor 22 controller (blur amount comparison means, warning output means)
26 Display section (image display means, warning output means)
31 Blur detection unit (blur detection means)
40 Display size conversion table (image conversion means)
81 Subject 90 Print blur tolerance table 100 Digital camera (imaging device)
160 Print size selection screen (print size selection means)

Claims (12)

An imaging apparatus including an imaging unit and a monitor,
Print size selection means for selecting one of a plurality of print sizes prepared in advance;
Image conversion means for converting the image acquired by the imaging unit into an image having the same size as the print size selected by the print size selection means;
On the monitor, image display means for through-displaying an image converted to the same size as the print size selected by the print size selection means by the image conversion means,
An image pickup apparatus comprising:   The print size is display information defined by the paper size to be printed and the size of the image printed on the selected paper size, and the print size selection means has a plurality of print sizes prepared in advance. 2. The apparatus according to claim 1, further comprising means for selecting a paper size from among the means and means for selecting whether to print an image with the selected paper size or to print an image with the selected paper size. Imaging device. Furthermore, a blur detection means for detecting blur,
A blur amount comparison unit that compares a blur amount detected by the blur detection unit with a print blur tolerance prepared in advance for each of a plurality of print sizes;
Warning output means for outputting a warning based on the comparison result by the blur amount comparison means;
The imaging apparatus according to claim 1, further comprising:   2. The image pickup apparatus according to claim 1, further comprising a blur detection unit that includes a blur detection unit that notifies an allowable print size prepared in advance based on the detected blur amount.   The imaging apparatus according to claim 4, wherein the blur detection unit is set with a print blur allowable amount corresponding to a print size selected by the print size selection unit. Furthermore, it has a print information memory that associates the model information of a plurality of printers with the print size that can be printed for each model,
The print size selection means includes a printer selection means for selecting a printer based on a plurality of model information stored in the print information memory, and a print size associated with the printer selected by the printer selection means. Means for selecting a desired print size from the inside,
The imaging apparatus according to claim 1, wherein the image display unit displays a captured image having a size that is the same as a size printed by the selected printer. A display method of an imaging apparatus including an imaging unit and a monitor,
Selecting a plurality of print sizes prepared in advance for images captured by the imaging unit;
Converting an image captured by the imaging unit into an image having the same size as the selected print size;
Displaying the image converted to the same size as the selected print size on the monitor,
A display method characterized by comprising: An image blur confirmation display method in an image display device including an imaging unit and a monitor,
Selecting the print size of the image;
Detecting a blur amount of the image;
Comparing the detected blur amount with a print blur tolerance prepared in advance for each of a plurality of print sizes;
Informing information based on the comparison result;
An image blur checking method characterized by comprising: A program executable by a computer of an imaging apparatus including an imaging unit and a monitor,
A function for selecting a plurality of print sizes prepared in advance;
A function of converting an image acquired by the imaging unit into an image having the same size as the selected print size;
A function for displaying the converted image on the monitor in the same size as the selected print size;
A program that executes.   A computer-readable storage medium storing a program for causing a computer to execute each step of the display method according to claim 7.   A computer-readable storage medium storing a program for causing a computer to execute each step of the image blur checking method according to claim 8.   A computer-readable storage medium storing the program according to claim 9.

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