KR100673952B1 - Method for grouping efficient image in digital camera - Google Patents

Method for grouping efficient image in digital camera Download PDF

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Publication number
KR100673952B1
KR100673952B1 KR1020040083976A KR20040083976A KR100673952B1 KR 100673952 B1 KR100673952 B1 KR 100673952B1 KR 1020040083976 A KR1020040083976 A KR 1020040083976A KR 20040083976 A KR20040083976 A KR 20040083976A KR 100673952 B1 KR100673952 B1 KR 100673952B1
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KR
South Korea
Prior art keywords
image
area
memory
valid
captured image
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KR1020040083976A
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Korean (ko)
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KR20060034931A (en
Inventor
김현석
장원규
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삼성테크윈 주식회사
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Priority to KR1020040083976A priority Critical patent/KR100673952B1/en
Publication of KR20060034931A publication Critical patent/KR20060034931A/en
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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00Details of television systems
    • H04N5/76Television signal recording
    • H04N5/765Interface circuits between an apparatus for recording and another apparatus
    • H04N5/77Interface circuits between an apparatus for recording and another apparatus between a recording apparatus and a television camera
    • GPHYSICS
    • G06COMPUTING; CALCULATING; COUNTING
    • G06TIMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T7/00Image analysis
    • G06T7/10Segmentation; Edge detection
    • G06T7/136Segmentation; Edge detection involving thresholding

Abstract

The present invention relates to a method for operating a digital camera, wherein an image captured by using AF (Auto focus) data inserted at the time of image capture or feature information (a portion of which outlines or color change is severe) of the captured image is valid and effective. It relates to a method of classifying images that are not. A method of classifying valid images in a digital camera includes a method of operating a digital camera, the method comprising: (a) storing AF data of a captured image in a first area of a memory, and (b) a dummy part of the image file retrieved from the first area. Comparing the AF data recorded in the reference data with the reference AF data, and (c) when the AF data recorded in the dummy part of the photographed image file is out of a reference AF data range as a result of the comparison, storing the photographed image file in the memory. And storing the captured image file in a third area of the memory when the AF data recorded in the dummy area of the captured image file is within a reference AF data range. According to the present invention, the captured image is classified into a valid image and an invalid image by using AF (auto focus) data inserted during image capturing or feature information of the captured image (a portion of the outline or a color change is severe). You can easily free up space on the memory card without complicated key operations.

Description

Method for grouping efficient image in digital camera

1 is a perspective view showing the front appearance of a digital camera.

FIG. 2 is a rear view illustrating a rear outline of the digital camera of FIG. 1.

3 is a diagram illustrating an incident side structure of the digital camera of FIG. 1.

4 is a block diagram showing the overall configuration of the digital camera of FIG.

5 is a flowchart illustrating an operation of a method of classifying valid images in a digital camera according to a first embodiment of the present invention.

6 is a flowchart illustrating an operation of a method of classifying valid images in a digital camera according to a second embodiment of the present invention.

The present invention relates to a method for operating a digital camera, wherein an image captured by using AF (Auto focus) data inserted at the time of image capture or feature information (a portion of which outlines or color change is severe) of the captured image is valid and effective. It relates to a method of classifying images that are not.

When photographing a subject with a general digital camera, a CCD & COMS element (not shown) that receives an image is processed into a memory card after processing the image in a DSP (not shown). When shooting images with the camera, the AF (Auto focusing) motor is driven in half-shutter conditions. Or it can be done without AF process. The images received in these two cases are passed through the DSP to improve image quality or other image processing techniques. Finally, the images are finally stored in the memory card we are using.

The digital cameras used up to now store all image data in a memory card as a storage medium without valid judgment of the captured image. Recently, the capacity of the memory card is increasing, but the development of CCD & COMS devices can have many pixels, so users want to obtain a large sized image. This makes the memory space of the storage medium always feel small even if the size of the memory card is increased. If the space of the memory card is insufficient and the space is to be secured, space can be secured by removing unnecessary images except the effective image. If the number of Granny image files is large, it may be inconvenient to search and select a large number of images one by one. This process causes the inconvenience of having a lot of time and a lot of key manipulation to make space of the memory card resulting from deleting the already taken image.

The technical problem to be achieved by the present invention is to use the AF (Auto focus) data inserted at the time of image capture or feature information of the captured image (parts with sharp outlines or color changes), which is effective and effective. It is to provide a method for classifying the image as not.

According to a first aspect of the present invention, there is provided a method of classifying an effective image in a digital camera according to an embodiment of the present invention. Storing in; (b) comparing the AF data recorded in the dummy part of the image file retrieved from the first area with the reference AF data; And (c) when the AF data recorded in the dummy part of the photographed image file is out of a reference AF data range, storing the photographed image file in a second area of the memory, and comparing the photographed image file. And storing the captured image file in a third area of the memory when the AF data recorded in the dummy portion of the image is in the reference AF data range.

In the present invention, the AF data generated on the half-shutter in the step (a) is recorded in the dummy part of the image file to be captured, and the object is photographed and stored in the first area of the memory.

In the present invention, the second area of the memory is an invalid folder in which invalid photographed images are stored, and the third area of the memory is a valid folder in which valid photographed images are stored.

In the present invention, the captured image stored in the second area of the memory can be moved to the third area of the memory by the user's selection.

In the present invention, after a predetermined time elapses, the captured image stored in the second area of the memory is deleted.

According to an aspect of the present invention, a method of classifying valid images in a digital camera according to a first embodiment of the present invention is a method of operating a digital camera, comprising: (a) detecting a photographed image stored in a first area of a memory; And extracting feature information (portion of change of outline or color) from the detected image; (b) comparing the extracted feature information with a threshold value; And (c) if the extracted feature information is equal to or less than a threshold value, storing the photographed image in a second area of the memory; and if the extracted feature information is equal to or greater than a threshold value, storing the photographed image in the memory. Preferably storing in a third region of the substrate.

In the present invention, the threshold value is set differently according to the photographed subject.

In the present invention, the second area of the memory is an invalid folder in which invalid photographed images are stored, and the third area of the memory is a valid folder in which valid photographed images are stored.

In the present invention, the captured image stored in the second area of the memory can be moved to the third area of the memory by the user's selection.

In the present invention, after a predetermined time elapses, the captured image stored in the second area of the memory is deleted.

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

1 is a perspective view showing the front appearance of a typical digital camera.

Referring to FIG. 1, in front of a general digital camera, a microphone (MIC), a self-timer lamp 11, a flash 12, a shutter button 13, a mode dial 14, and a function-selection button 15 are provided. , The photographing-information display section 16, the viewfinder 17a, the function-block button 18, the flash-light amount sensor 19, the lens section 20, and the external interface section 21.

In the self-timer mode, the self-timer lamp 11 operates for a set time from when the shutter button 13 is pressed to when the shutter is operated. The mode dial 14 is used to select and set various modes, for example, a still image shooting mode, a night view shooting mode, a moving picture shooting mode, a playback mode, a computer connection mode, and a system setting mode. The function-selection button 15 is used for the user to select one of the operation modes of the digital camera 1, for example, a still image shooting mode, a night view shooting mode, a moving picture shooting mode, and a playback mode. The shooting-information display section 16 displays information of each function related to shooting. The function-block button 18 is used for the user to select each function displayed on the shooting-information display unit 16.

FIG. 2 is a rear view illustrating a rear outline of the digital camera of FIG. 1.

2, behind the conventional digital camera 1, a speaker SP, a power button 31, a monitor button 32, an auto-focus lamp 33, a viewfinder 17b, a flash standby Lamp 34, display panel (LCD) 35, exposure compensation / deletion button 36, enter / playback button 37, menu / OK button 38, wide angle-zoom button (39w), telephoto-zoom button 39t, up-move button 40up, right-move button 40ri, down-move button 40lo, and left-move button 40le, representative- There is a voice button 42 and a playback mode button 42.

The monitor button 32 is used by the user to control the operation of the display panel 35. For example, when the user presses the monitor button 32 first, the image of the subject and the shooting information thereof are displayed on the display panel 35, and when the user presses the second time, only the image of the subject is displayed on the display panel 35. When pressed for the third time, power applied to the display panel 35 is cut off.

The auto-focus lamp 33 operates when the auto focusing operation is completed.

The flash standby lamp 34 operates when the flash (12 in FIG. 1) is in standby for operation.

The exposure compensation / deletion button 36 is used as a delete button in the process of adjusting the amount of light or manually setting each mode when the digital camera is manually operated.

The enter / playback button 37 is used for inputting data from the user or for a function such as stopping or playing in the playback mode.

The menu / OK button 38 is used to display and select the menu of the mode selected in the mode dial 14.

The up-movement button 40up, the right-movement button 40ri, the down-movement button 40lo, and the left-movement button 40le are also used in the process of setting each mode by the user.

The playback mode button 42 is used to check and manipulate the last photographed image, video or audio information.

3 is a diagram illustrating an incident side structure of the digital camera of FIG. 1.

4 is a block diagram showing the overall configuration of the digital camera of FIG. 3 and 4, the overall configuration of the digital camera will be described.

The optical system OPS including the lens unit 20 and the filter unit 41 optically processes light from a subject. The lens unit 20 of the optical system OPS includes a zoom lens ZL, a focus lens FL, and a compensation lens CL.

When the user presses the wide angle-zoom button (39w in FIG. 2) or the telephoto-zoom button (39t in FIG. 2) included in the user input unit INP, a corresponding signal is output to the microcontroller 512. ) Is entered. Accordingly, as the microcontroller 512 controls the lens driver 510, the zoom motor MZ is driven to move the zoom lens ZL. That is, when the wide angle-zoom button (39w in FIG. 2) is pressed, the focal length of the zoom lens ZL is shortened to widen the angle of view, and the telephoto-zoom button 39t is When pressed, the focal length of the zoom lens ZL becomes long and the angle of view becomes narrow.

According to such a characteristic, the microcontroller 512 may obtain an angle of view θ with respect to the position of the zoom lens ZL from the design data of the optical system OPS. Here, since the position of the focus lens FL is adjusted while the position of the zoom lens ZL is set, the angle of view θ is hardly influenced by the position of the focus lens FL. The compensation lens CL serves to compensate for the overall refractive index and is not driven separately.

Reference numeral MA denotes a motor for driving an aperture (not shown). Here, the rotation angle of the aperture drive motor MA is changed depending on the case of the designated exposure mode and the case of not. The designated exposure mode refers to a mode for setting the exposure amount of the digital camera to the average brightness of the designated detection area when the desired area of the target area matches the designated detection area displayed on the display panel 35 of the digital camera. Say.

In the filter portion 41 of the optical system OPS, an optical low pass filter (OLPF) removes optical noise of high frequency content. Infra-Red cut filters (IRFs) block infrared components of incident light.

A photoelectric conversion unit (OEC) of a charge coupled device (CCD) or a complementary metal-oxide-semiconductor (CMOS) converts light from an optical system (OPS) into an electrical analog signal. Here, the digital signal processor 507 controls the timing circuit 502 to control the operations of the photoelectric converter OEC and the analog-digital converter 501. The CDS-ADC (Correlation Double Sampler and Analog-to-Digital Converter) element 501 as an analog-to-digital converter processes the analog signal from the photoelectric converter (OEC), removes the high frequency noise, and adjusts the amplitude. After that, it is converted into a digital signal. The digital signal processor 507 processes the digital signal from the CDS-ADC element 501 to generate a digital image signal classified into luminance and chroma signals.

The light emitting portion LAMP driven by the microcontroller 512 includes a self-timer lamp 11, an auto-focus lamp (33 in FIG. 2) and a flash standby lamp (34 in FIG. 2). The user input unit INP includes a shutter button (13 in FIG. 1), a mode dial (14 in FIG. 1), a function-selection button (15 in FIG. 1), a function-block button (18 in FIG. 1), a monitor button. (32 in FIG. 2), OK / Delete button (36 in FIG. 2), enter / playback button (37 in FIG. 2), menu button (38 in FIG. 2), wide-zoom button (39w in FIG. 2), telephoto -Zoom button (39t in FIG. 2), up-move button (40up in FIG. 2), right-move button (40ri in FIG. 2), down-move button (40lo in FIG. 2), and left-move button (FIG. 2, 40le).

The digital video signal from the digital signal processor 507 is temporarily stored in the DRAM (Dynamic Random Access Memory) 504. The EEPROM (Electrically Erasable Programmable Read Only Memory) 505 stores algorithms and setting data necessary for the operation of the digital signal processor 507.

The memory card 515 of the user is detached from the memory card interface 506.

The digital image signal from the digital signal processor 507 is input to the LCD driver 514, whereby the image is displayed on the color LCD panel 35, that is, the display unit.

On the other hand, the digital video signal from the digital signal processor 507 can be transmitted by serial communication via a universal serial bus (USB) connection 21a or an RS232C interface 508 and its connection 21b, and a video filter ( 509 and the video output unit 21c can be transmitted as a video signal.

The audio processor 513 outputs the audio signal from the microphone MIC to the digital signal processor 507 or the speaker SP, and outputs the audio signal from the digital signal processor 507 to the speaker SP. On the other hand, the flash 12 is driven through the microcontroller 512 and the flash controller 511 according to the signal from the flash-light amount sensor 19.

The microcontroller 512 controls the memory card 515 to classify an image to be photographed by the user or an image photographed by the user into a valid image and an invalid image and store the image in the memory card 515 to free the memory card 515. Space can be secured. For this purpose, the memory card 515 is divided into three areas. The photographed image is stored in the first area of the memory card 515, and the invalid image is stored in the second area of the memory card 515 by the classification control operation of the microcontroller 512, and the memory card 515 is stored. The valid region is stored in the third area of) by the classification control operation of the microcontroller 512.

Hereinafter, a method of classifying valid images in a digital camera will be described with reference to FIGS. 5 and 6.

FIG. 5 is a flowchart illustrating an operation of a method of classifying valid images in a digital camera according to a first embodiment of the present invention. The AF data captured on a preview immediately before photographing a subject is recorded in a dummy portion of an image file to be captured. (500 steps). The user takes a half shutter operation to automatically focus immediately before the subject is photographed, and records the AF data generated during the half shutter operation in the dummy portion of the image file to be captured. Generally, the captured image file has the structure of dummy part, header part and data part, and it is a structure that can insert user information or other file information privately in the dummy part. By inserting additional content, it can be used for search and comparison. In the present invention, the AF data of the image to be photographed is inserted in the dummy part.

After the AF data is recorded in the dummy portion, the user photographs the subject through a full shutter operation (step 501). The captured image is temporarily stored in the DRAM 504 under the control of the microcontroller 512, and then stored in the first area of the memory card 515.

Then, in order to secure the free space of the memory card 515, the user loads the captured image stored in the first area of the memory card 515, and the microcontroller 512 uses the AF recorded in the dummy portion of the captured image. The data is compared with previously stored reference AF data (step 502). This step may be carried out after the shooting, or may be carried out simultaneously with the shooting, in the present invention will be described as carried out after shooting.

As a result of the comparison of the microcontroller 512, if the AF data recorded in the dummy part of the captured image is within the reference AF data range previously stored (step 503), the microcontroller 512 is shaken (shake) of the captured image. It is determined that there is no information, and the photographed image is determined to be valid data (step 504).

The captured image determined to be valid data is moved and stored from the first area to the third area of the memory card 515, that is, into a valid folder, under the control of the microcontroller 512 (step 505).

A valid image stored in the third area of the memory card 515, that is, a valid folder, is then used for a peripheral device such as a printer (step 506).

However, when the comparison result of the microcontroller 512, the AF data recorded in the dummy portion of the captured image exceeds the reference AF data range previously stored (step 503), the microcontroller 512 is shaken in the captured image It is determined that (shake) has occurred, and the photographed image is judged as invalid data (step 507).

The captured image determined as invalid data is moved and stored from the first area to the second area of the memory card 515, that is, into an invalid folder, under the control of the microcontroller 512 (step 508).

If a shake has occurred, but it is determined from the user's side that the image stored in the second area of the memory card 515, that is, the invalid folder, is an important image, it can be restored to valid data (step 509).

 When an image is selected by the user from the second area of the memory card 515, i.e., an invalid folder, the selected image is a third area in the second area of the memory card 515, i.e. an invalid folder, i.e. a valid folder. Move on to step 510.

If an image is not selected by the user from the second area of the memory card 515, that is, an invalid folder, it is deleted after a predetermined time has elapsed (step 511).

6 is a flowchart illustrating an operation of a method of classifying valid images in a digital camera according to a second embodiment of the present invention. 6 is a method for classifying a valid image or an invalid image from a captured image to which AF information is not inserted.

The user loads the captured image stored in the first area of the memory card 515 to secure the free space of the memory card 515 (step 600).

The microcontroller 512 extracts specific information (a portion of which the outline or color conversion is severe) from the detected image (step 601). The computer vision algorithm can extract the feature information of the image. For example, by executing the AF algorithm included in the computer vision algorithm, it recognizes the change in the histogram of the image according to the movement of the AF motor to recognize the position with the largest histogram value as the AF state, and use this information as feature information. Can be. In addition, feature information can be extracted through edge detection of the captured image. These AF algorithms and edge detection are all included in computer vision algorithms.

The microcontroller 512 compares the extracted feature information with a threshold value (step 602). Threshold value can be set differently according to the object target of the captured image to increase the reliability of the function. For example, a photograph of an object such as a person is prominent when a contour feature is extracted using a computer vision algorithm. However, a blurring phenomenon of an image occurs in a shaken image, that is, an image in which AF is not corrected, so that the contour feature is significantly lower than in the case where AF is correct. Therefore, the threshold value may be set differently according to the feature information (the part where the outline or the color change is severe).

As a result of the comparison of the microcontroller 512, if the extracted feature information is equal to or greater than the threshold value (step 603), the microcontroller 512 determines that there is no abnormality in the feature information of the photographed image (part of which the outline or color conversion is severe), The image is judged to be valid data (step 604).

The captured image determined to be valid data is moved and stored from the first area to the third area of the memory card 515, that is, into a valid folder, under the control of the microcontroller 512 (step 605).

A valid image stored in the third area of the memory card 515, that is, a valid folder, is then used for a peripheral device such as a printer (step 606).

However, when the extracted feature information is less than the threshold value as a result of the comparison of the microcontroller 512 (step 603), the microcontroller 512 determines that there is an abnormality in the feature information of the photographed image (a portion of which the outline or color conversion is severe). In operation 607, the captured image is determined to be invalid data.

The captured image determined as invalid data is moved and stored from the first area to the second area of the memory card 515, that is, to an invalid folder, under the control of the microcontroller 512 (step 608).

If there is an abnormality in the sharp part of the outline or color change, but it is determined from the user's side that the image stored in the second area of the memory card 515, that is, the invalid folder, is an important image, it can be restored as valid data (609). step).

 When an image is selected by the user from the second area of the memory card 515, i.e., an invalid folder, the selected image is a third area in the second area of the memory card 515, i.e. an invalid folder, i.e. a valid folder. Move on to step 610.

If an image is not selected by the user from the second area of the memory card 515, that is, an invalid folder, it is deleted after a predetermined time has elapsed (step 611).

So far I looked at the center of the preferred embodiment for the present invention. Those skilled in the art will appreciate that the present invention can be implemented in a modified form without departing from the essential features of the present invention. Therefore, the disclosed embodiments should be considered in descriptive sense only and not for purposes of limitation. The scope of the present invention is shown in the claims rather than the foregoing description, and all differences within the scope will be construed as being included in the present invention.

As described above, according to the present invention, an image captured by using AF (Auto focus) data inserted at the time of image capturing or feature information of the captured image (a part of which the outline or color change is severe) is not valid and invalid. By sorting the images, you can easily free up memory space without complicated key manipulation.

Claims (10)

  1. delete
  2. delete
  3. delete
  4. delete
  5. delete
  6. As a digital camera operation method,
    (a) detecting a photographed image stored in the first area of the memory and extracting feature information (a part of which the outline or color change is severe) from the detected image;
    (b) comparing the extracted feature information with a threshold value; And
    (c) when the extracted feature information is equal to or less than a threshold value, storing the photographed image in a second area of the memory; and when the extracted feature information is equal to or greater than a threshold value, the captured image is stored in the memory. And storing the valid image in a third area.
  7. The method of claim 6, wherein the threshold value is set differently according to a photographed subject.
  8. 7. The valid image of claim 6, wherein the second region of the memory is an invalid folder in which invalid photographed images are stored, and the third region of the memory is a valid folder in which valid photographed images are stored. How to classify.
  9. The method of claim 6,
    And the captured image stored in the second area of the memory may move to the third area of the memory by a user's selection.
  10. The method of claim 9,
    And after a predetermined time has elapsed, the captured image stored in the second area of the memory is deleted.
KR1020040083976A 2004-10-20 2004-10-20 Method for grouping efficient image in digital camera KR100673952B1 (en)

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US9036977B2 (en) 2007-03-22 2015-05-19 Microsoft Technology Licensing, Llc Automatic detection, removal, replacement and tagging of flash frames in a video
KR101431541B1 (en) * 2008-01-18 2014-08-19 삼성전자주식회사 Method for grouping efficient image in digital camera
KR100947737B1 (en) * 2008-04-17 2010-03-17 에스케이 텔레콤주식회사 Mobile telecommunication system, and method for detecting a synchronization image, and method for synchronization between broadcasting contents and data information

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