KR101436834B1 - Apparatus for processing digital image and method for controlling thereof - Google Patents

Abstract

The present invention relates to a digital image processing apparatus and a control method thereof, which can compare an acquired image with an acquired image to determine whether the acquired image is a desired image. According to another aspect of the present invention, Recognizing a face of a person in the input image; Storing the input image as a reference image; Acquiring a photographed image; Recognizing a face of a person on the photographed image; Comparing the reference image with the photographed image; And storing the photographed image when the reference image and the photographed image are determined to be the same image as the reference image and the photographed image.

Description

[0001] The present invention relates to a digital image processing apparatus and a control method thereof,

[0001] The present invention relates to a digital image processing apparatus and a control method thereof, and more particularly, to a digital image processing apparatus and a control method thereof. More particularly, the present invention relates to a digital image processing apparatus and an image processing method thereof, And a control method therefor.

Typically, the digital image processing apparatus includes all apparatuses that process images of a digital camera, a PDA (personal digital assistant), a phone camera, a PC camera, or the like and use an image recognition sensor.

The digital image processing apparatus can process an image received through an image pickup device in a digital signal processor, compress the image to generate an image file, and store the image file in a memory.

In addition, the digital image processing apparatus can receive input through an image pickup device or display an image of an image file stored in a storage medium on a display device such as an LCD (Liquid Crystal Display).

At this time, the captured image input through the image pickup device is displayed on a display device such as an LCD, so that the user can confirm whether the acquired image is a desired image.

On the other hand, it can be difficult to shoot a subject with a lot of motion as in the case of a child photography. When a child takes a picture, they can miss the desired scene or acquire an image whose face can not be recognized.

An object of the present invention is to provide a digital image processing apparatus and a control method thereof that can compare an image obtained before image capture with a captured image to determine whether the obtained image is a desired image.

According to another aspect of the present invention,

Recognizing a face of a person in the input image;

Storing the input image as a reference image;

Acquiring a photographed image;

Recognizing a face of a person on the photographed image;

Comparing the reference image with the photographed image; And

And storing the photographed image when the reference image and the photographed image are determined to be the same image as the reference image and the photographed image.

If at least one of the position of the face and the number of faces is different from the reference image and the captured image as a result of comparing the reference image and the captured image, it is determined that the reference image and the captured image are not the same image can do.

If the reference image and the captured image are not the same as the reference image and the captured image as a result of comparing the reference image and the captured image, the step of deleting the captured image may be performed.

Wherein the reference image and the captured image are compared with each other to determine that the reference image and the captured image are not identical to each other, the captured image is set as a problem image, and the problem image of the problem image and the problem image are stored The method comprising the steps of:

Performing at least one of autofocusing, automatic white balance, and automatic exposure adjustment on the face of the person in the input image.

If the reference image and the photographed image are not the same as the reference image and the photographed image as a result of the comparison, the photographed image is stored as a problem image and the problem image is reproduced .

And a step of deleting the problem image by user selection.

According to another aspect of the present invention, there is provided an image processing apparatus including an image input unit receiving an input image; Wherein one of the input images is regarded as a reference image and one of the input images is acquired to be a captured image and the reference image and the captured image are compared with each other, A controller for storing the photographed image; And a storage unit for storing the reference image and the photographed image.

The display unit may further include a display unit for displaying the problem image and displaying the problem image to the user and deleting the problem image upon confirmation of the user.

According to the digital image processing apparatus and the control method thereof according to the present invention, a desired image can be photographed by judging whether an image obtained by comparing an image obtained before image capture with a captured image is a desired image.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

1 is a rear view of a digital camera 100 according to an exemplary embodiment of the present invention.

Referring to FIG. 1, a direction button 21, a menu-OK button 22, a wide angle-zoom button W, a telephoto-zoom button Zoom ) Button T, a display panel 25, and the like.

The direction button 21 may include a total of four buttons including an up button 21a, a down button 21b, a left button 21c, and a right button 21d. The direction button 21 and the menu-OK button 22 are keys for inputting various menus related to the operation of the digital image processing apparatus such as a digital camera.

Wide angle-zoom button (W) or telephoto-zoom button (T) widens the angle of view or narrows the angle of view depending on the input. In particular, it can be used to change the size of the selected exposure area. As the display panel 25, an image display device such as a liquid crystal display (LCD) may be used.

The display panel 25 may be included in the display unit (750 of FIG. 7) in which the problem image can be displayed when it is determined that the reference image and the photographed image are not the same according to the present invention.

A shutter release button 26, a flash (not shown), a power switch 28, and a lens unit (not shown) may be provided on a front surface or a top surface of the digital camera 100. In addition, an objective lens and an eyepiece lens of the viewfinder 27 may be provided on the front and rear surfaces of the digital camera 100.

The direction button 21, the menu-OK button 22, the shutter release button 26, and the power switch 28 are included in a user operation portion (760 in FIG. 7) .

The shutter release button 26 is opened and closed to expose an image pickup element or film such as a CCD (Charge Coupled Device) to light for a predetermined time. Further, the shutter release button interlocks with an iris (not shown) to appropriately expose the subject to record the image on the imaging element.

On the other hand, the shutter release button 26 can be pressed in two stages. The first signal S1 is generated when the shutter release button 26 is pressed at one end, and the second signal S2 is generated when the shutter release button 26 is depressed at this end. The photographing preparation operation is performed by the first signal S1, and the photographing can be performed by the second signal S2.

As an embodiment of the digital image processing apparatus to which the present invention can be applied, a digital camera, a control apparatus thereof, and a control method thereof are disclosed in U.S. Patent Application Publication No. 2004/0130650 (titled: automatic using a quadratic function of a camera A focusing method, a focusing method, and a quadratic function in camera.

The digital camera, its control device, and control method disclosed in the above-mentioned U.S. application are incorporated in this specification, and a detailed description thereof will be omitted.

2 is a block diagram of a control apparatus 200 of a digital image processing apparatus according to a preferred embodiment of the present invention. The control device 200 of the digital image processing apparatus can be installed inside the digital camera 100 of FIG.

Referring to the drawings, an optical system (OPS) including a lens unit and a filter unit optically processes light from a subject. The lens unit of the optical system OPS includes a zoom lens, a focus lens, and a compensation lens. When the user presses the wide-zoom button W or telephoto-zoom button T included in the user input unit INP, a corresponding signal is input to the microcontroller 212.

Accordingly, as the microcontroller 212 controls the lens driving unit 210, the zoom motor M _Z is driven to move the zoom lens. That is, when the wide-angle zoom button W is depressed, the focal length of the zoom lens is shortened to enlarge the angle of view, and if the telephoto-zoom button T is depressed, the focal length of the zoom lens becomes long and the angle of view becomes narrow.

Meanwhile, in the auto focusing mode, the main controller built in the digital signal processor 207 controls the lens driving unit 210 through the micro controller 212, so that the focus motor M _F is driven do. That is, the focus motor M _F is driven to move the focus lens to a position where the sharpest picture can be obtained. The auto focus mode may be performed according to the first signal S1 generated by pressing the shutter release button input through the user input unit INP at one time.

The compensation lens compensates for the overall refractive index and is not driven separately. Reference symbol M _A denotes a motor for driving an aperture (not shown).

In the filter section of the optical system (OPS), an optical low pass filter removes optical noise of a high frequency component. Infra-red cut filter blocks the infrared component of incident light.

The photoelectric conversion unit OEC may include an image pickup device such as a CCD (Charge Coupled Device) or a CMOS (Complementary Metal-Oxide-Semiconductor). The photoelectric conversion unit OEC converts light from the optical system OPS into an electrical analog signal.

The analog-to-digital conversion unit may include a CDS-ADC (Correlation Double Sampler and Analog-to-Digital Converter) The analog-to-digital converter processes the analog signal from the photoelectric converter (OEC), removes the high-frequency noise, adjusts the amplitude, and converts the analog signal into a digital signal. Here, the digital signal processor 207 controls the timing circuit 202 to control the operations of the photoelectric conversion unit (OEC) and the analog-digital conversion unit 201.

The optical system OPS, the photoelectric conversion unit OEC, the CDS-ADC device 201, and the like may be included in the image input unit 710 of FIG. 7 according to the present invention.

The real-time clock 203 provides time information to the digital signal processor 207. The digital signal processor 207 processes digital signals from the CDS-ADC device 201 to generate digital image signals classified into luminance (Y value) and chromaticity (R, G, B) signals.

A self-timer lamp, an auto-focus lamp, a mode indicating lamp, a flash standby lamp, and the like are connected to the light emitting unit (LAMP) driven by the microcontroller 212 under the control of the main controller incorporated in the digital signal processor 207 .

The digital signal processor 207 and / or the microcontroller 212 may be included in the controller 720 of FIG. 7 according to the present invention. Also, the user input inputted by the operation of the user operation unit 750 of FIG. 7 according to the present invention is input to the digital signal processor 207 and / or the micro controller 212 through the user input unit INP and processed, The work can be performed accordingly.

A digital image signal from the digital signal processor 207 is temporarily stored in a DRAM (Dynamic Random Access Memory) 204. An EEPROM (Electrically Erasable and Programmable Read Only Memory) 205 stores algorithms and setting data such as a boot program and a key input program necessary for the operation of the digital signal processor 207. In the memory card interface 206, a user's memory card can be detached.

The memory card recognized through the DRAM 204 or the memory card interface 206 is connected to the first storage unit 730 and / or the second storage unit 740 (see FIG. 7) of the photographed image temporarily or non- ).

The digital image signal from the digital signal processor 207 is input to the display panel driver 214, thereby displaying an image on the display panel 215. [

The display panel driver 214 for driving the display panel 215 and the display panel 215 includes a display unit 750 (FIG. 7) capable of displaying at least one of a photographed image, a problem image, and a problem content according to the present invention, .

On the other hand, the digital image signal from the digital signal processor 207 can be transmitted by serial communication through a USB (Universal Serial Bus) connection part 31a or an RS232C interface 208 and its connection part 31b, 209 and the video output unit 31c as video signals. Here, the digital signal processor 207 may incorporate a micro controller therein.

The audio processor 213 outputs the audio signal from the microphone MIC to the digital signal processor 207 or the speaker SP and outputs the audio signal from the digital signal processor 207 to the speaker SP.

3A and 3B are flowcharts of a control method (S300) of a digital image processing apparatus as a preferred embodiment according to the present invention. 4 is a flowchart of a method (S400) of checking a problem image stored by the control method (S300) of the digital image processing apparatus.

The control method S300 of the digital image processing apparatus can be implemented in the control apparatus 200 of the digital image processing apparatus of FIG. 2 and / or the digital image processing apparatus 700 of FIG. To this end, the control method (S300) of the digital image processing apparatus according to the present invention may be a program or algorithm stored in the storage means of FIG. 2 or implemented in the form of a semiconductor chip such as a firmware.

The control method S300 of the digital image processing apparatus according to the present invention may compare the reference image stored immediately before capturing with the captured image to determine whether the captured image is a desired image.

Accordingly, it is possible to know whether the photographed image is the same image as the image selected for photographed immediately before photographing. Therefore, it is possible to help the user to capture a desired image.

Especially, it is more useful for checking the face of a person before taking a picture and performing preparations for photographing such as auto focusing, automatic white balance adjustment, or automatic exposure adjustment around a person's face.

In this case, a face detection technique is used in the preview image to detect a person's face, and at least one of auto focusing, automatic white balance adjustment, and automatic exposure adjustment around the face , It is possible to take a picture in which the face of a person is clearer and has a good color.

When taking pictures of children, it can be difficult to shoot with many movements of children. Particularly, in the preparation for taking a picture, an image can be obtained in a state in which the preparation for photographing is completed with the face of a child in a certain state as a center. Due to the movement during acquisition of the image, The user may not be able to take a desired picture at the beginning.

In particular, children can pause their movements before taking a picture, but it is not easy to prevent children from moving while taking pictures, especially during long exposure times, such as indoors. In addition, it may be inconvenient to check and delete the photographed images when continuous shooting is performed.

Therefore, in the present invention, when a captured image after shooting is compared with a reference image that has recognized the face immediately before shooting, and a different image is photographed from a shooting preparation operation just before shooting due to the movement of the subject, . In addition, it is possible to provide a function of displaying problem images collectively or informing the contents of the problems so that the problematic images can be collectively checked at a later time.

Therefore, the present invention can help the user to easily photograph or confirm a desired image.

A control method (S300) of the digital image processing apparatus includes an image input step (S310); A first face recognizing step (S320); A photographing preparation operation step S325; Reference image storage step S330; A captured image acquiring step S340; A second face recognizing step (S350); Image comparing step (S361, S362); A captured image storage step (S370); A problem image deleting step S380; And a problem image storage step (S390).

In the image input step S310, an input image is input. In the first face recognition step (S320), a human face is recognized from the input image. In the shooting preparation operation step (S325), the photographing preparation operation is performed on the input image with the face of the person as the center.

In the reference image storage step S330, an input image is stored as a reference image. In the captured image acquisition step S340, a captured image is captured. In the second face recognition step (S350), a face of a person is recognized in the photographed image.

In the image comparing step (S361, S362), the reference image and the photographed image are compared. In the captured image storage step (S370), if the reference image and the captured image are compared with each other, the captured image is stored.

In the problem image erasing step S380, when the reference image and the photographing image are compared with each other, it is determined that the reference image and the photographed image are not the same, the problem image is deleted with the photographed image as a problem image.

In the problem image storage step (S390), when the reference image and the photographed image are compared with each other, it is determined that the reference image and the photographed image are not identical to each other, the photographed image is regarded as a problem image and the problem image is stored.

The control method S300 of the digital image processing apparatus may be started by inputting the first signal (S305). That is, when the shutter release button (26 in FIG. 1) is pressed in the first stage and the first signal S1 is inputted, the control method (S300) of the digital image processing apparatus according to the present embodiment can be started accordingly.

In the image input step S310, an input image can be input from the outside. At this time, the input image may be input through an image input unit (710 of FIG. 7) including an optical system (OPS), a photoelectric conversion unit (OEC), a CDS-

At this time, the input image may be a preview image continuously input through the image input unit (710 of FIG. 7) at a predetermined time interval before image acquisition.

In the first face recognition step (S320), a face of a person is recognized in the input image, and the position of the face and the number of the face are recognized. At this time, it is preferable that the recognition of the position of the face of the person and the number of faces is performed on the image immediately before the input of the second signal S2 among the preview images.

That is, the recognition of the position of the face and the number of faces of the person can be performed on the image of the frame immediately before the captured image obtained by the input of the second signal S2. Also, the image of the frame immediately before the photographed image can be a reference image to be compared with the photographed image.

In the shooting preparation operation step (S325), a shooting preparation operation can be performed on the input image. At this time, the photographing preparation operation may be performed based on the face of the person included in the input image.

To do this, we use the face detection technique in the preview image to detect a person's face and perform various adjustments including auto focusing, automatic white balance adjustment, and automatic exposure adjustment around the face By performing the function, a person's face can be photographed with a clearer and better color.

The reference image storing step S330 may be started by inputting the second signal (S329). That is, when the shutter release button (26 in FIG. 1) is pressed in two stages and the second signal S2 is input, the reference image storage step S330 according to the present embodiment can be performed accordingly.

In the reference image storage step S330, one of the input images may be stored as a reference image. At this time, it is preferable that the reference image is a preview image input in a frame immediately before the captured image is input.

In another embodiment, an image input to a frame immediately before a captured image is input is selected as a reference image among preview images, a face of a person is recognized in a reference image, and the number of recognized faces is checked .

In the captured image acquisition step S340, the captured image is captured by inputting the second signal. At this time, one frame image of the input image is temporarily stored in the photographed image, and the image is subjected to image processing to generate an image file.

In the second face recognition step (S350), a face of a person is recognized on the photographed image, and the position of the face and the number of the faces are recognized.

In the image comparing step (S361, S362), the reference image and the photographed image are compared. At this time, the position of the human face and the number of human faces can be compared with each other in the reference image and the captured image. At this time, if any one of the positions of the human face and the number of human faces is changed, it can be determined that the photographed image is different from the reference image.

That is, if any one of the position of the human face and the number of the human faces is changed, a change occurs in the subject after the reference image in which the photographing preparation operation has been performed, and the input time of the photographing start signal by the second signal S2, It can be determined that the images at the time of acquiring the images are different from each other.

At this time, since the photographing preparatory operation is performed on the basis of the reference image, it can be seen that there is a problem with the reference of the photographing preparation task. Also, if the position of the human face and the number of human faces are different, it can be seen that the subject moves in a short time between the reference image and the shot image.

The time between the reference image and the photographed image may be the exposure time for the input image, and may correspond to a case where the photographed image is shaken if there is motion of the subject in between.

Meanwhile, FIG. 5 shows an embodiment of the reference image 50 in the control method (S300) of the digital image processing apparatus. In addition, FIG. 6 shows an embodiment of the captured image 60 compared with the reference image 50 of FIG.

Referring to the drawing, a reference image 50 includes three human face regions 51, 52, and 53. Also, the photographed image 60 compared with the reference image also includes three human face regions 61, 62, and 63.

It can be seen that the face 61a included in the human face area 61 on the left side of the photographed image 60 compared with the reference image is shaken with respect to the same face 51a in the reference image 50. [ In this case, as shown in FIG. 6, an image in which the face 61a included in the left human face area 61 is shaken can be obtained as an image of a captured image.

In the image comparison step (S361, S362), the reference image and the photographed image are first compared (S361), and it is determined whether the photographed image is a problem-free image (S362). Next, according to the result of comparing the reference image and the photographed image, either the photographed image storage step (S370), the problem image deleting step (S380), and the problem image storing step (S390) may be performed.

As a result of comparing the reference image and the captured image, if the reference image and the captured image are determined to be the same image, a captured image storage step (S370) may be performed. In the captured image storage step (S370), the captured image is stored.

If it is determined that the reference image and the photographed image are not the same as the reference image and the photographed image, it is determined that the photographed image is a problem image and the problem image deletion step (S380) or the problem image storage step (S390) .

In the problem image deletion step (S380), the problem image is deleted with the photographed image as a problem image. In the problem image storage step S390, the photographed image is set as a problem image, and the problem image is stored.

At this time, if it is determined that the reference image and the photographed image are not the same, and if the face check function is set to ON (S371), a problem image deletion step (S380) is performed by the user's selection (S372) . If the user selects to store the problem image in step S372, the captured image storage step S370 may be performed using the problem image as the captured image.

In addition, if the reference image and the photographed image are judged to be not the same and the face checking function is set to OFF (S371), the problem image storing step (S390) may be performed.

At this time, in the problem image storing step (S390), the problem image of the problem image and the problem image can be stored. At this time, the content of the problem may include information of the change of the face position and / or the change of the number of the face.

The content of the problem can be recorded inside the file of the problem image. At this time, the contents of the problem can be included in an exchange image file format (Exif, exchangeable image file format). As another example, the problem content may be recorded in a separate problem file.

Therefore, the control method (S300) of the digital image processing apparatus according to the present invention can compare the captured reference image stored immediately before capturing with the captured image to determine whether the captured image is a desired image.

Accordingly, it is possible to know whether the photographed image is the same image as the image selected for photographed immediately before photographing. Therefore, it is possible to help the user to capture a desired image.

The control method (S300) of the digital image processing apparatus may include a method (S400) of checking the stored problem image. At this time, a method of confirming a stored problem image (S400) includes a problem image reproducing step (S430); And a problem image erasing step S450.

In the problem image reproducing step S430, the problem image is reproduced. In the problem image deletion step S450, the problem image is deleted.

In order to check the stored problem image, when a playback command signal is input, it is determined whether there is a problem image (S410). At this time, if there is no problem image, a normal playback step (S470) can be performed.

If there is a problem image, the user receives an input of whether or not to view the problem image first (S420). At this time, if the user does not want to view the problem image first, a normal playback step S470 may be performed.

If it is desired to view the problem image first, the problem image reproducing step S430 is performed. At this time, in the problem image reproducing step S430, the problem image stored by the control method S300 of the digital image processing apparatus of FIGS. 3A and 3B can be reproduced.

That is, when the reference image and the photographed image are compared in the control method of the digital image processing apparatus (S300), if the reference image and the photographed image are judged to be not the same image, the photographed image is regarded as a problem image, And the problem image stored in the problem image reproducing step S430 may be reproduced.

In step S430, the problem image is displayed on a display device such as an LCD or a user input on whether to delete the problem image is received in step S440. At this time, if an input for deleting the problem image is received, S450) may be performed. In the problem image deletion step S450, the stored problem image is deleted.

Next, it is confirmed whether an unidentified problem image remains (S460). If no unidentified problem image remains, a normal playback step (S470) can be performed. If the unidentified problem image remains, the problem image reproducing step S430 may be performed again.

FIG. 7 is a block diagram of a digital image processing apparatus 700 according to a preferred embodiment of the present invention. The digital image processing apparatus 700 can be controlled by a control method (S300) of the digital image processing apparatus shown in Figs. 3A and 3B.

Referring to the drawings, a digital image processing apparatus 700 includes an image input unit 710; A control unit 720; Storage units 730 and 740; A display unit 750; And a user operation unit 760. The digital image processing apparatus 700 is controlled by the control methods (S300 and S400) of the digital image processing apparatus shown in Figs. 3A and 3B and Fig. 4, and is the same as the description of Figs. 3A and 3B and Fig. Refer to this for details.

The image input unit 710 receives an input image. The control unit 720 takes one of the input images as a reference image, acquires one of the input images to form a captured image, compares the reference image with the captured image, If it is judged, the captured image is stored.

Reference images and photographed images are stored in the storage units 730 and 740. The display unit 750 displays the problem image to be displayed to the user, and allows the problem image to be deleted by the user's confirmation. The user operation unit 760 operates the user so that a desired command can be input from the outside.

The image input unit 710 receiving the input image may include an optical system (OPS), a photoelectric conversion unit (OEC), a CDS-ADC device 201, and the like of FIG.

The control unit 720 takes one of the input images as a reference image and acquires one of the input images to obtain a captured image. The reference image and the captured image are compared with each other, If it is judged, the captured image is stored. In this case, it is preferable that the reference image is a preview image input into a frame immediately before the captured image is input.

In addition, the control unit 720 recognizes the face of the person in the reference image, confirms the number of recognized faces, recognizes the face of the person in the captured image, and confirms the number of recognized faces. At this time, the reference image and the photographed image can be compared by comparing at least any one of the position of the face and the number of the faces.

In addition, when the reference image and the captured image are compared with each other, the control unit 720 can delete the captured image when the reference image and the captured image are not the same image. In addition, when the reference image and the captured image are compared with each other, it is possible to set the captured image as a problem image and to store the problem image of the problem image and the problem image when the reference image and the captured image are not identical.

At this time, the contents of the problem may be recorded inside the file of the problem image or may be recorded in a separate problem file.

Reference images and photographed images are stored in the storage units 730 and 740. The storage units 730 and 740 may include a first storage unit 730 and a second storage unit 740. At this time, the reference image and the photographed image may be temporarily stored in the first storage unit 730. In the second storage unit 740, a photographed image, a problem image, and a problem content may be stored in a nonvolatile manner.

The first storage unit 730 may be a DRAM (204 in FIG. 2) or a cache memory for temporarily storing data. The second storage unit 740 may be a flash memory or a memory card recognized through a memory card interface (206 in FIG. 2) or the like in which data is stored in a non-volatile manner.

A problem image is displayed on the display unit 750 to be displayed to the user, and the problem image can be deleted by the user's confirmation. The user operation unit 760 operates the user so that a desired command can be input from the outside.

7) of the user operation portion (760 in Fig. 7) which includes a direction button (21 in Fig. 1), a menu-OK button (22 in Fig. 1), a shutter release button (26 in Fig. 1) .

Therefore, the digital image processing apparatus 700 according to the present invention can compare the reference image stored immediately before capturing with the captured image to determine whether the captured image is a desired image.

Accordingly, it is possible to know whether the photographed image is the same image as the image selected for photographed immediately before photographing. Therefore, it is possible to help the user to capture a desired image.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is clearly understood that the same is by way of illustration and example only and is not to be taken by way of limitation, You will understand. Accordingly, the true scope of protection of the present invention should be determined only by the appended claims.

FIG. 1 is a view showing the external appearance of a digital camera according to an embodiment of the digital image processing apparatus according to the present invention.

FIG. 2 is a block diagram schematically illustrating a control device that may be included in the digital camera of FIG. 1. Referring to FIG.

3A and 3B are flowcharts schematically illustrating a control method of a digital image processing apparatus according to a preferred embodiment of the present invention.

FIG. 4 is a flowchart schematically illustrating a method for checking a problem image stored by the control method of the digital image processing apparatus of FIGS. 3A and 3B.

FIG. 5 is a view schematically showing an embodiment of a reference image in the control method of the digital image processing apparatus of FIGS. 3A and 3B.

FIG. 6 is a view schematically showing an embodiment of a photographed image compared with the reference image of FIG.

7 is a block diagram schematically showing a digital image processing apparatus according to a preferred embodiment of the present invention.

Claims (18)

Receiving an input image; Recognizing a face of a person in the input image; Storing the input image as a reference image; Acquiring a photographed image; Recognizing a face of a person on the photographed image; Comparing the reference image with the photographed image; And And storing the photographed image when the reference image and the photographed image are determined to be the same image as the reference image and the photographed image, Wherein a face of a person is recognized from the reference image and the number of recognized faces of the person is confirmed. The method according to claim 1, If at least one of the position of the face and the number of faces is different from the reference image and the captured image as a result of comparing the reference image and the captured image, it is determined that the reference image and the captured image are not the same image The control method of the digital image processing apparatus. The method according to claim 1, Further comprising the step of deleting the photographed image when it is determined that the reference image and the photographed image are not identical as a result of comparing the reference image and the photographed image. The method according to claim 1, Wherein the reference image and the captured image are compared with each other to determine that the reference image and the captured image are not identical to each other, the captured image is set as a problem image, and the problem image of the problem image and the problem image are stored Further comprising the steps of: 5. The method of claim 4, Wherein the content of the problem is recorded in a file of the problem image or in a separate problem file. The method according to claim 1, Performing at least one of autofocusing, automatic white balance, and automatic exposure adjustment on the face of the person in the input image. The method according to claim 1, Wherein the reference image is a preview image input in a frame immediately before the captured image is input. delete The method according to claim 1, Further comprising the step of storing the captured image as a problem image and reproducing the problem image when the reference image and the captured image are not the same as the reference image and the captured image as a result of comparing the reference image and the captured image, A method of controlling a digital image processing apparatus. 10. The method of claim 9, Further comprising the step of deleting the problem image by user selection. A video input unit receiving an input video; Wherein one of the input images is regarded as a reference image and one of the input images is acquired to be a captured image and the reference image and the captured image are compared with each other, A controller for storing the photographed image; And And a storage unit for storing the reference image and the photographed image, Wherein the control unit recognizes a face of the person on the reference image and confirms the number of recognized faces of the person. 12. The method of claim 11, The storage unit, A first storage unit in which the reference image and the captured image are temporarily stored, And a second storage unit for storing the photographed image in a nonvolatile manner. 12. The method of claim 11, In the control unit, Recognizing a face of a person on the photographed image, checking the number of recognized faces of the person, And compares at least one of the position of the face and the number of faces to compare the reference image and the photographed image. 12. The method of claim 11, Wherein the control unit deletes the photographed image when it is determined that the reference image and the photographed image are not identical as a result of comparing the reference image and the photographed image. 12. The method of claim 11, Wherein the reference image and the captured image are compared with each other to determine that the reference image and the captured image are not identical to each other, the captured image is set as a problem image, and the problem image of the problem image and the problem image are stored Digital image processing apparatus. 16. The method of claim 15, Wherein the content of the problem is recorded in a file of the problem image or in a separate problem file. 16. The method of claim 15, Further comprising a display unit for displaying the problem image and displaying the problem image to the user and deleting the problem image by confirmation of the user. 12. The method of claim 11, Wherein the reference image is a preview image input in a frame immediately before the captured image is input.

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