KR100318749B1 - Real-time multi-screen shooting device and shooting method of digital still camera - Google Patents

Abstract

The instantaneous multi-screen photographing apparatus and the shooting method of the disclosed digital still camera continuously capture a screen immediately before the pressing of the shutter of the digital still camera, the screen of the moment when the button is pressed, and the screen immediately after the pressing, and the desired screen among the plurality of screens. The present invention relates to an instantaneous multi-screen photographing apparatus and a photographing method of a digital still camera.

The present invention provides a first step of determining whether the first shutter is operated when the user operates the first shutter, photographing the 'N-1 screen' when the determination is activated, and storing the captured screen information in a temporary memory; After the operation of the first shutter, it is determined whether the second shutter is operated again, and if the determination result is the second step of photographing the 'N screen', and storing the captured screen information in the temporary memory, and the second step After capturing the 'N screen' at a predetermined time delay, the third step of capturing the 'N + 1 screen' and storing the captured screen information in the temporary memory, and 'N-1, 'N and N + 1 screen' is automatically displayed to determine a fourth step of selecting a desired screen among the displayed screens, and determining whether a desired screen is selected in the fourth step. Side is stored in the memory for storing compressed, non-selected, the screen is comprised of a fifth step to be removed.

Therefore, it is possible to minimize the loss of unusable pictures by selecting and storing the well-taken pictures among the multi-sequential shots, and deleting the wrongly-taken pictures. It has an effect that can be made.

Description

Real-time multi-screen shooting device and shooting method of digital still camera

The present invention relates to an instantaneous multi-screen photographing apparatus and a photographing method of a digital still camera, and more particularly, a screen immediately before pressing a shutter of a digital still camera, a screen at the moment of pressing a button, and The present invention relates to an instantaneous multi-screen photographing apparatus and a photographing method of a digital still camera for continuously photographing a screen immediately after pressing and selecting and storing a desired screen among the plurality of screens.

In general, a digital still camera is a peripheral device for inputting an image connected to a PC and is a compact and lightweight camera that can be easily operated by anyone with the recent expansion of the home PC.

Such a digital still camera converts the image information into an electric signal and performs all the signal processing such as processing, recording, and reproduction.

In addition, as in the case of a camera using a conventional film, it is not necessary to perform darkroom work or chemical processing for development, and can immediately check the captured image. Since the recorded image information is electronicized, it is connected to a PC after shooting. Post-processing and remote transmission are possible, and its use is various.

For example, you can make a homepage using images taken with a digital still camera by connecting to the Internet, create various reports by inserting the shot images, and commemorative photos such as graduation or marriage. Can be made or stored on diskette.

These digital still cameras typically offer VGA (640 × 480) or higher resolutions, and have a large memory to record and record dozens of shots at a time.

In addition, there are two types of shutters that are pressed to take a picture, a two-stage two-stage shutter system and a single-stage one-stage shutter system.

At first, the two-stage shutter method is popular, and nowadays, the single-stage shutter method has been commercialized.

The two-stage shutter method is a method in which the user presses the shutter in two steps when the user presses the shutter. The user may feel the sensory sense but may not.

When pressed the first time, the control unit immediately recognizes the input signal, and even if the level of the video signal inputted by the AGC (Automatic Gain Control) function built in the digital still camera changes, that is, the amount of luminance around the camera when shooting. The control unit calculates an appropriate luminance compensation value and automatically amplifies and adjusts the gain so that the output is always constant when compared with the reference value of the luminance amount preset in the control unit.

When the second shutter is successively pressed, a picture is automatically taken by the adjusted amount of brightness, and the taken information is stored in the memory.

In addition, the single-shot shutter method allows the user to press the shutter once but performs the AGC function in one step at the moment of pressing it, takes two consecutive pictures, and stores the information in the memory. do.

However, if the shutter is closed by a momentary mistake or the unnecessary action is taken, whether the two-stage shutter method or the single-shot shutter method is used, the picture taken by pressing the shutter once cannot be modified again. The moments that are gone can no longer be photographed again.

Due to this, only a lot of wasteful pictures are wasted, and not only time and economic losses are lost, but the situation at the time of shooting cannot be reproduced again, which causes problems of being missed forever.

Accordingly, an object of the present invention is to select and store a picture taken well among multiple screens in which the screen immediately before the pressing of the digital still camera is pressed and the screen immediately after the pressing of the button and the screen immediately after the pressing are selected and stored. It eliminates the loss of wasting only the wasteful photos by erasing the taken photos, and also provides the instantaneous multi-screen shooting device and shooting method of the digital still camera, which maximizes the efficiency of capturing the moment by selecting the well taken photos. There is.

1 is a block diagram showing a schematic configuration of an instantaneous multi-screen photographing apparatus of a digital still camera of the present invention;

2 is a block diagram showing a schematic configuration of another embodiment of an instant multi-screen photographing apparatus of a digital still camera of the present invention;

3 is a flowchart illustrating an embodiment of a method for instantaneous multi-screen shooting of a digital still camera according to the present invention.

Explanation of symbols on the main parts of the drawings

1 Lens 2 CCD

3: CDS / AGC 4: analog / digital converter

5: temporary memory 6: control unit

7: JPEG processing unit 8: Memory for compressed storage

12: LCD panel unit 20: two-stage shutter unit

20a: first shutter 20b: second shutter

25: select key 30: single shutter portion

The instantaneous multi-screen photographing apparatus of the digital still camera according to the present invention for achieving the above object removes the noise of the electrical signal output from the CCD and the CCD converting the image signal of the subject incident through the lens unit to the electrical signal CDS / AGC that automatically amplifies and adjusts the gain so that the output is always constant even if the level of the input video signal changes, an analog / digital converter that converts the analog signal input from the CDS / AGC into a digital signal, and a CCD A temporary memory for storing the output image information of one frame, a JPEG processing unit for compressing a captured video signal to contain a large number of images, a compression storage memory for storing an image compressed and input by the JPEG processing unit, and The first shutter releases the N-1 screen automatically when the first press is pressed, and the second shutter moves when the second press is pressed. A two-stage shutter unit for shooting N screens while automatically shooting N + 1 screens continuously after a predetermined time; and storing a plurality of screens shot by the two-stage shutter unit in the temporary memory or the compression storage memory. A control unit for outputting a storage signal or a display signal for displaying the plurality of screens, an LCD panel unit connected to the control unit for displaying the plurality of screens, and a plurality of screens displayed on the LCD panel unit. It consists of a selection key to select the screen.

In addition, the instantaneous multi-screen recording method of the digital still camera of the present invention determines whether the first shutter is operated when the user operates the first shutter while the finder mode is executed, and when the determination result is 'N-1' Screen ”, and the captured screen information is stored in the temporary memory, and after the operation of the first shutter, it is determined whether the second shutter is operated again. The captured screen information is stored in the temporary memory in the second step, and after the predetermined time is delayed after taking the 'N screen' in the second step, the 'N + 1 screen' is taken and the captured screen The third step of storing information in the temporary memory, the fourth step of automatically displaying 'N-1, N and N + 1 screens' stored in the temporary memory, and selecting a desired screen from the displayed screens; The above In step 4, it is determined whether a desired screen is selected, and if it is determined that the selected screen is selected, the selected screen is stored in the memory for compressing storage.

Hereinafter, with reference to the accompanying drawings will be described in detail the instantaneous multi-screen recording apparatus and shooting method of the digital still camera of the present invention.

1 is a block diagram showing a schematic configuration of an instantaneous multi-screen photographing apparatus of a digital still camera of the present invention.

As shown, the CCD (Charge Coupled Device) 2 converts the image signal of the subject incident through the lens unit 1 into an electrical signal.

Various driving pulses for extracting the signal of the CCD 2 are converted into an actual driving voltage and supplied by a TG (Timing Generator) 10 to be described later.

In addition, unlike the interlace method used in the conventional camcorder, the CCD 2 uses a progressive scan method.

In other words, in interlaced scanning, a field image is output every 1/60 seconds (the first field represents an odd line and the second field represents an even line). Since the frame signal is output at the interval of 1/30 second, one image is read at a time, so the vertical resolution is excellent compared to the interlaced scanning method.

CDS (Correlated Double Sampling) / AGC (Automatic Gain Control) (3) eliminates the noise of the electrical signal output from CCD (2), and automatically gains the output so that the output is always constant even if the level of the input video signal changes. Amplify and adjust.

The analog / digital converter 4 converts the analog signal input from the CDS / AGC 3 into a digital signal.

The temporary memory 5 stores image information of one frame output through the CCD 2 so that the control unit 6 to be described later can perform signal processing.

At this time, the image information stored in the temporary memory 5 merely changes the signal of the CCD 2 into a digital form.

This temporary memory 5 normally uses DRAM (Dynamic Random Access Memory).

The controller 6 processes white balance, contour correction, and luminance / color difference signal conversion of the captured image input from the temporary memory 5.

In addition to the operations of the CCD 2, the CDS / AGC 3, the analog / digital converter 4, and the temporary memory 5 described above, the control unit 6 also includes the JPEG processing unit 7 and the compressed storage memory (described later). 8), the overall operation of the digital still camera, such as the encoder (9) and TG (10).

The Joint Photographic Coding Experts Group (JPEG) processing unit 7 compresses a video signal in order to contain a large number of images in a limited capacity compression storage memory 8 described later.

At this time, the compression ratio of the video signal input from the JPEG processing unit 7 is about 10: 1.

The compression storage memory 8 sequentially stores the image compressed and output from the JPEG processing unit 7.

In addition, the compression storage memory 8 is capable of high-speed recording / reproducing, and the reproduction is usually performed through a PC, and the image provided can be stored, processed and output to a printer or the like by an image editing program.

This compressed storage memory 8 usually uses a flash memory that is a nonvolatile memory.

The encoder 9 converts and outputs a captured image compressed by a digital still camera with a PC or the like.

The TG (Timing Generator) 10 generates various clocks and synchronization signals used for the digital camera, pulses for driving the CCD 2, etc., according to the control signal of the control unit 6.

Then, the shutter speed information necessary for light quantity control is input to adjust the amount of light accumulation of the CCD 2.

In addition, the controller 6 allows the user to easily manipulate a focal length or the like so that the photographing object displayed through the viewfinder is displayed on the LCD panel 12.

The two-stage shutter unit 20 is composed of a first shutter 20a and a second shutter 20b. The first shutter 20a is operated at the first pressing, and the first shutter 20a is pressed at the same time. The control unit 6 immediately recognizes and adjusts the luminance amount using the CDS / AGC 3, and then automatically takes a picture (N-1 screen) and stores it in the temporary memory 5. .

When the second shutter 20b, which is the second shutter in succession, is pressed, a picture is automatically taken (N screen), which is also stored in the temporary memory 5, and at the time of being stored in the temporary memory 5, the controller 6 ) Controls to take a picture once more and automatically takes a picture once more (N + 1 screen) and stores it in the temporary memory 5.

The controller 6 causes the LCD panel 12 to display the N-1 screen, the N screen, and the N + 1 screen stored in the temporary memory 5 in order one by one. Until the user selects one or more desired screens by using the selection key 25, the LCD panel 12 displays the photographed screens sequentially and repeatedly.

The selection key 25 may use one of the input keys of the conventional key input unit 11, or may make and use a separate selection key 25.

The selected screen is stored in the compression storage memory 8, and the remaining unselected screens are automatically deleted, thereby preventing waste of pictures and unnecessary storage.

In addition, the LCD panel 12 does not display the N-1 screen, the N screen, and the N + 1 screen in order one by one. Instead, only the program of the control unit 6 is changed so that the N-1 screen, the N screen, and the like. The desired screen can be selected while comparing and displaying the N + 1 screen on the LCD panel 12 at the same time.

Therefore, the screen immediately before the user presses the shutter key of the two-stage shutter unit 20 (N-1 screen), the screen immediately after the button is pressed (N screen), and the screen immediately after the press (N + 1 screen). At least three consecutive pictures will be taken.

2 is a block diagram showing a schematic configuration of another embodiment of an instant multi-screen photographing apparatus of a digital still camera of the present invention.

As shown, FIG. 2 is similar to FIG. 1 and is characterized by being composed of a single-ended shutter unit 30 instead of the two-stage shutter unit 20 of FIG.

When the user presses the shutter to take a picture in the one-shot shutter unit 30 connected to the control unit 6, the AGC function is performed in one step at the moment of pressing, and the picture is taken in two steps (N screen) ), The data is automatically stored in the temporary memory 5.

While automatically storing data in the temporary memory 5, the control unit 6 instructs to take a picture two or more times in succession so that the N + 1 screen, the N + 2 screen, the N + 3 screen. After the picture is taken, it is stored in the temporary memory 5.

In this embodiment, two consecutive shots of the N + 1 screen and the N + 2 screen are taken continuously so that three consecutive screens (N screen, N + 1 screen, N + 2 screen) are captured at the moment of pressing the shutter. do.

3 is a flow chart showing an embodiment of the instant multi-screen shooting method of a digital still camera having a two-stage shutter according to the present invention.

As shown, the first step is to perform a finder (FINDER) mode to focus on the object to be photographed (S1), when the user operates the first shutter (20a), the control unit 6 is the first shutter ( 20a) is determined to be activated (S2), and if the determination is activated, the first screen (N-1 screen) is photographed (S3), and the captured first screen information is stored in the temporary memory 5 (S4). If it doesn't work, repeat the process from the beginning.

In the second step, it is determined whether the second shutter 20b is operated after the operation of the first shutter 20a (S5). If the determination is performed, the second screen (N screen) is photographed (S6), The second screen information is stored in the temporary memory 5 (S7), and if the determination is not performed, the second screen information is repeated again from the first step.

In the third step, the second screen (N screen) is photographed in the second step and a predetermined time is delayed (S8), the third screen (N + 1 screen) is photographed (S9), and the photographed second 3 screen information is stored in the temporary memory 5 (S10).

In the fourth step, the first, second and third screens stored in the temporary memory 5 are automatically displayed on the LCD panel 12 (S11), and the user displays a favorite screen among the displayed screens. The selection key 25 is used to select.

In a fifth step, the control unit 6 determines whether the selection key 25 is operated (S12). If the selection key 25 is operated as a result of the determination, the selected screen is stored in the memory 8 for compression storage and selected. The remaining screen is not deleted (S14), and the finder mode is performed again to take the next picture (S15).

As described above, the instantaneous multi-screen photographing apparatus and the photographing method of the digital still camera of the present invention minimize the loss of unusable pictures by selecting and storing well taken pictures from the continuously taken multiple screens and deleting wrongly taken pictures. Only moments captured or well taken pictures can be obtained to maximize the efficiency of the photographic work.

Claims (4)

A CCD for converting an image signal of a subject incident through the lens unit into an electrical signal; A CDS / AGC which removes noise of the electrical signal input from the CCD and automatically amplifies and adjusts a gain so that the output is always constant even if the level of the input image signal changes; An analog / digital converter for converting an analog signal input from the CDS / AGC into a digital signal; A temporary memory for temporarily storing image information input from the CCD; JPEG processing unit for compressing the captured image signal to contain a large number of images; A compression storage memory configured to store an image compressed and input by the JPEG processing unit; The first shutter releases the 'N-1 screen' automatically when the first shutter is pressed, the second shutter operates the 'N screen' while the second shutter is activated, and the 'N + 1' continuously after a predetermined time. A two-stage shutter unit for automatically photographing the screen; A controller for outputting a storage signal to store the plurality of screens photographed by the two-stage shutter unit in the temporary memory or the compression storage memory, or outputting a display signal to display the plurality of screens; An LCD panel unit connected to the controller to display the plurality of screens; And And a selection key for selecting a desired screen among a plurality of screens displayed on the LCD panel. The method of claim 1, The controller performs a function of displaying one by one in order on the LCD panel while repeatedly performing the 'N-1 screen, N screen and N + 1 screen' stored in the temporary memory until the user selects one or more desired screens. Or have the function of simultaneously displaying the 'N-1 screen, the N screen and the N + 1 screen'. The method of claim 1, Instead of the two-stage shutter unit, a single shutter unit may be mounted, and when the shutter of the single-type shutter unit is pressed, an 'N screen' is photographed at the moment of being pressed, and after a predetermined time, 'N + 1 screen' and 'N + 2' The screen is a multi-time shooting device of a digital still camera, characterized in that the picture is taken two or more times in succession. During execution of the finder mode, when the user operates the first shutter, it is determined whether the first shutter is operated. If the determination is performed, the first shutter is photographed and the screen information is stored in the temporary memory. step; A second step of determining whether the second shutter is operated again after the operation of the first shutter, photographing an 'N screen' if the determination is activated, and storing the captured screen information in a temporary memory; A third step of capturing the 'N + 1 screen' after the predetermined time is delayed after capturing the 'N screen' in the second step, and storing the captured screen information in a temporary memory; A fourth step of automatically displaying 'N-1, N and N + 1 screens' stored in the temporary memory and selecting a desired screen among the displayed screens; And In step 4, it is determined whether a desired screen is selected, and if the selected result is selected, the selected screen is stored in the memory for compressing storage, and the remaining non-selected screens are deleted in a fifth step. Instant multi-screen shooting method.