KR20060062723A - Method for converting moving image into still image and triming the still image - Google Patents

Abstract

The present invention relates to a method of operating a digital camera, and more particularly, to a method of trimming a still image by converting a moving image into a still image and trimming and storing a specific region. A method of trimming a still image by trimming the moving image may include: (a) extracting a predetermined still image from an arbitrary moving image; And (b) setting and trimming a desired area from the extracted still image. By converting an arbitrary frame into a still image while playing a video with a large image size, by zooming in and saving a specific part, trimming a still image can be made with a simple operation, and various functions of a digital camera can be provided to the user. .

Description

{Method for converting moving image into still image and triming the still image}

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

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

3 is a block diagram showing the overall configuration of the digital camera shown in FIGS. 1 and 2.

4 is a flowchart illustrating an operation of a method of trimming by moving a still image according to the present invention.

5 is a key recognition timing diagram for selecting a still image from a moving image.

6A illustrates a still image screen extracted from a moving picture, and FIG. 6B illustrates a screen obtained by trimming a still image. FIG.

The present invention relates to a method of operating a digital camera, and more particularly, to a method of trimming a still image by converting a moving image into a still image and trimming and storing a specific region.                         

With the development of digital technology, a new type of camera using a digital signal, i.e., the image of a subject is stored in memory as a digital signal represented by 0 and 1 so that the stored image can be directly connected to the computer without developing, printing, or scanning. Portable digital cameras have been developed and are rapidly spreading.

A digital camera converts an electric image signal of a subject into a digital signal using an imaging device such as a CCD and stores the digital signal of the photographed subject in a memory by a compression / restore operation of the digital signal, or through an output device. Output the data.

Accordingly, a digital camera that performs a photographing operation of a subject according to the above principle stores image data of a photographed subject on a memory card or the like which stores data without using a separate film as in a conventional general camera.

Such a digital camera is capable of both video recording and still image shooting, and changes the mode to capture video or still image. If there is a part of the recorded video that you want to make a still image, the playback of the recorded video stops the video at the desired location, and an arbitrary frame is displayed, which can be saved as a still image on a memory card. .

In the conventional digital camera, since the moving image image size is relatively small, such as 320 × 240 or 640 × 480, it is not necessary to enlarge a specific part of the screen to make a still image even when converting one frame of the moving image to a still image.

However, if the digital camera's video image size is getting higher and higher in size such as 1024 × 768, 1600 × 1200, 2048 × 1536, etc., one part of the high definition video is converted to a still image, and the specific part is enlarged and trimmed at the same time. The technology of converting bays into still images would be very useful.

The technical problem to be achieved by the present invention is to provide a method for trimming a still image by converting an arbitrary frame into a still image while the video having a large image size is enlarged, trimming and storing a specific portion.

According to an aspect of the present invention, there is provided a method of trimming a still image by trimming a moving image, the method comprising: (a) extracting a predetermined still image from an arbitrary moving image; And (b) setting and trimming a desired area from the extracted still image.

In the present invention, step (a) comprises the steps of: (a-1) pausing the video being played; (a-2) displaying the paused current frame and previous frames together; And (a-3) selecting a desired frame from the displayed plurality of frames and storing it as a still image.

In the present invention, the paused current frame and previous frames are reduced to be displayed as a thumbnail screen.                     

In the present invention, the step (b) comprises the steps of: (b-1) setting a desired area with the zoom operation and the direction key operation on the extracted still image; And (b-2) trimming and storing the set area.

In the present invention, it is possible to change the size of the trimmed still image.

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 13, a mode dial 14, a function-selection key 15, There is a shooting-information display section 16, a viewfinder 17a, a function-block key 18, a flash-light amount sensor 19, a lens section 20, and an external interface section 21.

In the self-timer mode, the self-timer lamp 11 operates for a set time from the time when the shutter 13 is pressed to the time when the shutter 13 operates.

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 key 15 is used for the user to select any one of operation modes of the digital camera, 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 key 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 shape of the digital camera illustrated in FIG. 1.

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

The monitor key 32 is used by the user to control the operation of the display panel (LCD) 35. For example, when the user presses the monitor key 32 first, an image of the subject and photographing information thereof are displayed on the display panel 35, and when the user presses a 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 key 36 is used as a deletion key in the process of adjusting the amount of light or manually setting each mode when the digital camera is manually operated.

The enter / playback key 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 key 38 is used to display and select the menu of the mode selected in the mode dial 14.

The wide angle-zoom key 39w and the telephoto-zoom key 39t vary their functions depending on the shooting mode and the playback mode. In the shooting mode, the wide-zoom key 39w and the tele-zoom key 39t are input to change the angle of view of the lens. That is, when the wide-zoom key 39w is input, the subject to be photographed is far away, and when the telephoto-zoom key 39t is pressed, the subject to be photographed is close. In playback mode, when the wide-zoom key 39w is input, a thumbnail screen is displayed on the display panel 35. When the wide-angle zoom key 39w is input while a random image is played, the image is reduced and displayed. When the zoom key 39t is inputted, the image is enlarged and displayed.

The up-movement key 40up, the right-movement key 40ri, the down-movement key 40lo, and the left-movement key 40le are used in the process of setting each mode by the user, and are displayed in the image displayed on the display panel 35. It is used to change location in.

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

3 is a block diagram showing the overall configuration of the digital camera shown in FIGS. 1 and 2.

The optical system OPS including the lens unit 20 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 key (39w in FIG. 2) or telephoto-zoom key (39t in FIG. 2) included in the user input unit INP, a corresponding signal is transmitted 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 key (39w in FIG. 2) is pressed, the focal length of the zoom lens ZL is shortened to widen the angle of view, and when the telephoto-zoom key 39t is pressed. The focal length of the zoom lens ZL becomes long and the angle of view becomes narrow.

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.

A photoelectric converter (OEC) 500 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 (13 in Fig. 1), a mode dial (14 in Fig. 1), a function-selection key (15 in Fig. 1), a function-block key (18 in Fig. 1), a monitor key (Fig. 2 of 32), OK / Delete key (36 in FIG. 2), Enter / Playback key (37 in FIG. 2), Menu / OK key (38 in FIG. 2), Wide-Zoom key (39w in FIG. 2), Tele- It includes a zoom key (39t in FIG. 2), an up-shift key (40up in FIG. 2), a right-shift key (40ri in FIG. 2), a down-shift key (40lo in FIG. 2), and a left-shift key (40le in FIG. 2). .

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 video output 21c may 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.

4 is a flowchart illustrating an operation of a method of trimming a still image according to an exemplary embodiment of the present invention. When the user selects a moving image playback menu, the digital signal processor 507 accesses the memory card 515 to display a moving image. Playback is made at 35 (step 400).

While watching the video being played on the display panel 35, when the part to be converted into the still image is played, the corresponding screen is paused (step 402). When the moving image is paused, only one frame is displayed on the display panel 35. In this case, image information of the corresponding frame is stored in an image buffer such as DRAM 504.

When a pause key (for example, the wide-zoom key 39w) is input at an arbitrary frame 600 during video playback as shown in FIG. 5A, the digital signal processor 507 uses a frame other than the frame as shown in FIG. 5B. 603 is displayed on the display panel 35. This is because a time delay occurs from the time when the pause key is input until the digital signal processor 507 recognizes the pause key. Accordingly, the digital signal processor 507 receiving the pause key during video playback displays the currently displayed frame 603 and the previous three frames 600, 601, and 602 together on the display panel 35 (404). step). The digital signal processor 507 displays a total of four frames in a reduced thumbnail screen. In order to use the wide-zoom key 39w as the pause key, an appointment must be made in advance. That is, when the wide-zoom key 39w is input during video playback, the microcontroller 512 recognizes this as a video pause key and pauses the video being played.

If there is a frame to be selected among the displayed frames (step 406), the user input unit INP, i.e., the up-move key 40up, the right-move key 40ri, the down-move key 40lo, and the left-move key ( 40le), a desired frame is selected, and the digital signal processor 507 converts the selected frame into a still image and stores it in the DRAM 504 (step 408). 6A shows an image selected by a user and converted into a still image.

If there is no frame to be selected among the displayed frames, enter the video play key to continuously play the video and find a frame to select.

When the zoom (reduction / enlargement) operation is to be performed on the still image displayed on the display panel 35 (step 410), the user inputs the wide-angle zoom key 39w and the telephoto-zoom key 39t, and the digital signal. The processor 507 enlarges or reduces the zoom operation of the still image according to the input wide-zoom key 39w and the telephoto-zoom key 39t, and on the display panel 35 on which the zoom operation is performed, the user moves the up-shift key ( 40up), the right-movement key 40ri, the down-movement key 40lo, and the left-movement key 40le move to the desired area (step 412).

When the trimming menu is selected in the moved area, the digital signal processor 507 trims the area currently being displayed, an example of which is shown in FIG. 6B (step 414). The trimmed still image may be changed in size by a user's selection. When the user selects the resize menu to change the size of the trimmed still image, the digital signal processor 507 may change the size of the trimmed still image.

The digital signal processor 507 stores the trimmed still image in the DRAM 504 and transmits the trimmed still image to the external memory 515 (steps 416 and 418).

When the zoom (reduction / enlargement) operation is not performed on the still image displayed on the display panel 35, the displayed still image is directly stored in the external memory 515.

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, while converting an arbitrary frame into a still image while the image having a large image size is reproduced, a specific portion is enlarged and trimmed and stored, thereby making it possible to create a still image trimmed by a simple operation. Various functions can be provided to the user.

Claims (5)

As the operation method of the digital camera, (a) extracting a predetermined still image from any video being played; And and (b) trimming the still image by setting a desired area from the extracted still image to trim. The method of claim 1, wherein step (a) (a-1) pausing the playing video; (a-2) displaying the paused current frame and previous frames together; And and (a-3) selecting a desired frame from the displayed plurality of frames and storing the desired frame as a still image. The method of claim 2, wherein the paused current frame and the previous frames are reduced and displayed on a thumbnail screen. The method of claim 1, wherein step (b) (b-1) setting a desired area on the extracted still image by a zoom operation and a direction key manipulation; And (b-2) a method of trimming a still image by trimming and storing the set region; The method of claim 4, wherein A method of trimming a still image of a moving picture, characterized in that the size of the trimmed still picture can be changed.

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