KR20010094614A - Control a photographing an apparatus and method for reducing a red eye - Google Patents

Abstract

PURPOSE: A control method for red-eye phenomenon prevention photographing and a device thereof are provided to carry out flash-photographing in response to a moving subject by misjudging a pre-light emission as a main light emission, thereby preventing the waste of films and improving the reliability of the camera. CONSTITUTION: A control method for red-eye phenomenon prevention photographing includes steps of setting a red-eye phenomenon preventing mode(S10), carrying out a pre-light emitting according to a first signal of a release switch when luminance of a subject is low(S20-S40), determining whether the first stage signal of the release switch is input again during the pre-light emitting(S50), carrying out the pre-light emitting again after a predetermined delay time and returning to the third step if the first stage signal of the release switch was input again, and carrying out photographing together with light emitting after the pre-light emitting if the first stage signal was not input again(S70,S80).

Description

Red-eye reduction control device and its control method {CONTROL A PHOTOGRAPHING AN APPARATUS AND METHOD FOR REDUCING A RED EYE}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a camera, and in particular, to control a camera operation from preliminary flash for red-eye reduction to the main flash for shooting, red-eye shooting to accurately perform flash-flash photography for red-eye reduction. A reduced shooting control apparatus and a control method thereof.

The red-eye phenomenon refers to a phenomenon in which a pupil of a person appears red when color is photographed from the front by using a light source that emits light in a dark place, that is, a flash bulb or an electronic flash. This red-eye phenomenon occurs when the pupil of the person is not accustomed to light, that is, when the pupil is photographed in a large open state.

Therefore, the conventional camera uses a method for preventing red-eye, in which flash photography is performed when the pupil of the person is sufficiently accustomed to the light and the pupil is small. That is, conventionally, before the photographing is performed, the preliminary light emission is performed to irradiate light in advance so that the pupil of the person is sufficiently adapted to the light, and then the photographing is performed together with the main light emission. Here, in the related art, a method of using the same flash as the main light for preliminary light emission, and a method of preliminary light emission using a light emitting diode (LED) or a lamp, etc. are used separately.

As a conventional technique using preliminary light emission to prevent such red-eye phenomenon, USP (US Patent Application Publication) 5,300,970, USP5,630,182, USP5,640,621, USP5,701,519, USP5,707,963, USP4,285,588 and the like are known.

Here, USP5,300,970 is an invention for preliminary light emission to be performed when the battery for flash emission is completed, USP5,630,182 is an invention for performing the present light emission after a predetermined time after the preliminary light emission, USP5,640,621 is The red eye light emission mode or the normal flash light emission mode is determined by the determination means, and the photographing is performed. USP5, 701, 519 is an invention that prevents the operation of another camera during the preliminary light emission operation. 717, 963 is a invention that can selectively emit light with the switch to select the red-eye reduction mode, USP4,285,588 is the invention that the pre-flash is first generated by the flash command and the main flash is performed after a certain time has elapsed.

However, the conventional technique as described above cannot cope with the movement of the subject during preliminary flash for red-eye reduction, and the user often misunderstands the preliminary flash when the flash fires for a predetermined time. There was a problem that occurs when shooting in the drive.

Accordingly, the present invention is to solve the conventional problem, the user performs the camera control corresponding to the operation of the subject during the preliminary light emission even when the subject misunderstands the preliminary light emission as the main light emission so that the normal shooting is performed. .

1 is a block diagram of a camera having a red-eye reduction function according to an embodiment of the present invention.

2 is an operation flowchart of a camera having a red eye reduction function according to a first embodiment of the present invention.

3 is an operation flowchart of a camera having a red-eye reduction function according to a second embodiment of the present invention.

4 is a flowchart illustrating an operation of an apparatus for controlling red-eye reduction imaging according to a third exemplary embodiment of the present invention.

A camera having a red eye function according to a feature of the present invention for achieving the above object includes a red eye reduction switch, a release switch, a metering unit, a control unit, a timer, and a flash unit.

Here, the red-eye reduction switch outputs a signal to be operated by the photographer to set the red-eye reduction mode. The release switch is operated by the photographer, and outputs a release first stage signal for initiating shooting and a release two stage signal for shooting. The light meter detects the brightness of the subject and outputs it as an electrical signal.

If the control unit determines that the luminance of the subject is a low luminance as the output signal of the light metering unit in the state where the red-eye reduction mode is set according to the output of the red-eye reduction switch, the control unit controls to perform preliminary light emission for a predetermined time and immediately after the preliminary light emission. When the first signal is input from the release switch for a time until, the first operation is performed to delay the present light emission operation by a predetermined delay time, and when the preliminary light emission is normally completed, the main light emission is controlled.

The timer performs a count operation under the control of the controller to provide information of a set delay time. The flash unit emits light to the subject by performing preliminary light emission and main light emission under the control of the controller.

In the above, the control unit is configured to perform preliminary light emission according to the release first stage signal and to perform main emission according to the release second stage signal, or to perform preliminary light emission according to the release second stage signal and the preliminary emission is completed. If so, it is preferable to control so as to perform the present light emission. Preferably, the flash unit includes a preliminary light emitting unit for preliminary light emission and a main light emitting unit for main light emission, wherein the preliminary light emitting unit is a red-eye reduction LED or lamp or a first xenon discharge tube. It is preferable that a light emitting part is a 2nd xenon discharge tube.

On the other hand, red-eye reduction shooting control method according to another feature of the present invention for achieving the above technical problem,

Setting a red-eye reduction mode; A second step of performing preliminary light emission according to the first signal of the release switch if the object brightness is low brightness; Determining whether the release first stage signal of the release switch is input again during preliminary light emission; A fourth step of performing the preliminary light emission again after a predetermined delay time and returning to the third step if the release first stage signal is input again in the fourth step; And a fifth step of performing photographing together with the main emission after completion of the preliminary emission, when the release first stage signal is not input again in the fourth operation.

Here, the first signal may be a release first stage signal or a release two stage signal.

In the third step, preliminary light emission may be performed according to the release first stage signal, or preliminary light emission may be performed according to the release second stage signal.

Hereinafter, with reference to the accompanying drawings will be described the operation of the red-eye reduction shooting control apparatus according to an embodiment of the present invention.

1 is a block diagram of a red-eye reduction photographing control apparatus according to an exemplary embodiment of the present invention. As shown in FIG. 1, the red-eye reduction imaging control apparatus according to the exemplary embodiment of the present invention includes a red-eye reduction mode switch SW1, a release switch SW2, a light metering unit 100, a ranger 200, and a controller 300. ), A timer 400, a flash unit 500, and a display unit 600.

Here, the timer 400 is generally built in the control unit 300, but is said to be externally mounted for clarity. The flash unit 400 includes a preliminary light emitter 510 for preliminary light emission and a main light emitter 520 for main light emission. The preliminary light emitter 510 includes a preliminary light source 511 for irradiating light, The preliminary accumulator 512 is configured to accumulate electric charge and provide an operating power source of the preliminary light source 512. The light emitting unit 520 includes a light emitting light source 521 for irradiating light, and a light emitting light source (accumulating electric charge). And a light emission accumulation unit 522 that provides an operating power source of the 521.

The preliminary accumulator 512 and the light emitting accumulator 522 are connected to a power source voltage (not shown), respectively, and accumulate a current applied from the power source voltage to form a light emission voltage to the preliminary light source 511 and the light source 521. Supply. Here, the preliminary light source of the preliminary light emitter 510 may be a light emitting diode, a lamp, or a xenon discharge tube.

Meanwhile, the display unit 600 displays the shooting extension operation according to the output of the controller 300. In this case, the display unit 600 is a range confirming LED and a charge confirming LED, and the display extension operation display differs depending on a case where the range confirming LED and the charge confirming LED are integral with each other. That is, the display unit 600 sequentially turns on the two light emitting diodes during the set shooting extended time when the light emitting diode is composed of two light emitting diodes, and turns on and blinks the flashing light during the shooting extended time when the light emitting diode is composed of one light emitting diode.

Here, each of the switches SW1 and SW2 is operated by the photographer and driven, and the photometric unit 100 and the ranger 200 are driven according to the output signal of the control unit 300 according to the release first stage signal, and detected. The object luminance information and the information on the distance between the camera and the subject are output to the controller 300 as electrical signals. The timer 400 starts count driving according to the output signal of the controller 300 applied when the output signal of the release switch SW2 is generated during the operation of the preliminary light emitting unit 511 and outputs count information to the controller 300. Then, the drive is stopped by the control unit 300 after the set time.

The preliminary light emitter 510 of the flash unit 500 emits a preliminary light source to the subject according to a control signal output from the controller 300 when the first stage release or the second stage release signals S21 and S22 are generated. The operation is stopped according to the control signal of the control unit 300 outputted according to the generation of the first stage signal S \ 21, and then operates again after a predetermined time. After the release two-stage signal S22 is generated and the light emission operation of the preliminary light emission unit 510 is completed, the light emission unit 510 performs the light emission operation according to a control signal output from the controller 300.

Hereinafter, the operation of the red-eye reduction imaging control apparatus according to the first embodiment of the present invention with reference to FIG. 2 will be described in detail.

2 is a flowchart of an operation of a red eye reduction photographing control apparatus according to a first exemplary embodiment of the present invention. As shown in FIG. 2, when the photographer signals the red-eye reduction switch SW1 on, the controller 300 sets the red-eye reduction mode by inputting an on signal of the red-eye reduction switch SW1 (S10).

When the red-eye reduction mode is set and the photographer generates the release first stage signal by operating the release switch SW2, the controller 300 inputs the first stage release signal to the photometer 100 and the range 200. Outputs a driving signal and inputs and calculates a luminance signal of a subject detected by driving the photometric unit 100 and the ranger 200 and a ranging signal, which is a distance between the camera and the subject, and calculates the distance between the camera and the subject and the subject. The luminance is determined (S20, S30).

Herein, the controller 300 controls autofocus adjustment to be performed as the distance between the determined camera and the subject, and determines exposure control and flash emission as the determined subject luminance. At this time, if it is determined that the flash should be emitted with the low luminance of the subject, the controller 300 outputs a driving signal to the preliminary light emitter 510.

Then, the preliminary light source 511 of the preliminary light emitter 510 is driven according to the driving signal output from the controller 300 to emit light to the subject. In this case, the preliminary accumulation unit 512 is in a state in which an operating voltage for operating the preliminary light source 511 is formed. Here, the preliminary light source 511 is an LED, that is, a light emitting diode, it is also possible to use a lamp instead of the light emitting diode (S40).

Here, the preliminary light emitter 510 performs the preliminary light emitting operation for a set time according to the control signal of the controller 300. The set time is a time at which the pupil of the person, which is the subject, is small enough so that a red eye does not occur. Is set.

Meanwhile, the controller 300 drives the preliminary light emitter 510 and then determines whether the preliminary light emission of the preliminary light emitter 510 is completed. This is to respond to the (S50).

That is, most ordinary people lack knowledge of red-eye, and thus, many people do not know that the main flash is performed after the preliminary flash is performed during the red-eye shooting. It is considered to be the main light emission and judges that the shooting has been made, and before the main light emission is performed, it moves or blinks. At this time, when the photographer presses the release switch SW2, the control unit 300 causes the preliminary light emission to stop.

In other words, when the photographer presses the release switch SW2 during preliminary light emission, the release first stage signal SW1 is generated, and accordingly, the controller 300 determines that the release first stage signal SW1 has been generated, and thus the preliminary light emitting unit The control signal is output to 510 to stop the operation of the preliminary light source 511 (S61 and S62).

At the same time as the operation of the preliminary light source 511 is stopped, the controller 300 drives the timer 400 to check the time, and determines whether the checked time has reached the set shooting extension time (S63).

Here, the photographing extension time is for the photographer to set the composition of the subject again and at the same time, the preliminary accumulator 512 may accumulate a voltage capable of driving the preliminary light source 511. Meanwhile, the controller 300 drives the display unit 600 to allow the photographer and the subject person to confirm that the shooting extension operation is performed.

Accordingly, when the display unit 600 includes one range confirming light emitting diode and another charge confirming light emitting diode, the display unit 600 measures the distance at the time when the driving of the timer 400 starts according to the control signal of the controller 300. The operation of emitting only the confirmation light emitting diode, emitting only the charge confirming light emitting diode after a predetermined time, and then again emitting only the range confirming light emitting diode after a predetermined time is repeated. This repetitive operation is performed until the end of the operation of the timer 400, that is, the end of the shooting extension time. On the other hand, when the display unit 600 is composed of one LED for confirming the distance and checking the charge, the display unit 600 turns on the light at the initial point of the shooting extension time, blinks after a predetermined time, and then repeats the light operation after the predetermined time. . This repetitive operation is performed until the end of the shooting extension time. Here, the person skilled in the art can easily use the display extension 600 to check the shooting extension in the finder without using the light emitting diode without using the light emitting diode for checking the distance and the light emitting diode for checking the charge. A message such as a sign indicating a message may be displayed.

On the other hand, when the control unit 300 determines that the shooting extension time set by checking the time from the timer 400 has been reached (S64), the control unit 300 outputs a driving signal to the preliminary light emitting unit 510 so that the preliminary light source 511 emits light. (S40). Then, the controller 300 determines whether the light emission of the preliminary light source 511 is completed for the set preliminary light emission time (S50), and when the preliminary light emission is completed, determines whether the release two-stage signal S22 is input (S70). ).

The controller 300 outputs a driving signal to the light emitting unit 520 to emit light when the release two-stage signal S22 is input, thereby emitting the light emitting light source 521. At the same time, the control unit 300 drives the shutter unit (not shown) to take a picture.

Hereinafter, an operation of the red-eye reduction imaging control apparatus according to the second embodiment of the present invention will be described with reference to FIG. 3.

First, the red-eye reduction imaging control apparatus according to the second embodiment of the present invention is configured in the same way as the configuration of the red-eye reduction imaging control apparatus according to the first embodiment of the present invention.

3 is a flowchart illustrating an operation of an apparatus for controlling red-eye reduction imaging according to a second exemplary embodiment of the present invention. As shown in FIG. 3, the red-eye reduction imaging control apparatus according to the second exemplary embodiment of the present invention emits the preliminary light source 511 when the first stage signal is released to perform preliminary light emission. Unlike performing the flash control operation corresponding to the movement of the subject during light emission, when the release first stage signal is generated while the red-eye reduction mode is set, only the ranging and metering operations are performed, and when the release second stage signal occurs, a spare light source ( 511 is driven during the preliminary preliminary light emission time and performs a flash control operation corresponding to whether the subject moves during the preliminary light emission.

That is, briefly, when the red-eye reduction mode is set according to the output signal of the red-eye reduction switch SW1, the control unit 300 drives the range unit 200 and the light metering unit 100 when the release first stage signal is input. By receiving a signal for focusing and exposure control to perform automatic focusing and exposure control (S100, S200, S300).

Then, the control unit 300 determines whether the release second stage signal is input (S400), and after the release second stage signal is input and controls the preliminary light source 511 to emit light for a predetermined preliminary emission time (S500), the preliminary stage. It is determined whether there is an input of the release first stage signal during light emission (S600 and S610).

Here, when the release first stage signal S21 is input during preliminary light emission, the controller 300 stops light emission of the preliminary light source 511 and drives the timer 400 to determine the set shooting extension time (S620, S630, When the release two-stage signal S22 is input (S640), the preliminary light source 511 is again emitted (S500).

On the other hand, in the determination (S600), when the preliminary light emission is completed, the control unit 300 emits the light emission light source 521 so that the main light emission is performed, and at the same time controls to be photographed (S700, S800).

Hereinafter, an apparatus for controlling red-eye reduction imaging according to a third exemplary embodiment of the present invention will be described with reference to FIG. 4.

First, the red-eye reduction imaging control apparatus according to the third embodiment of the present invention is almost the same as the configuration of the red-eye reduction imaging apparatus according to the first embodiment of the present invention, but the xenon in which the preliminary light source 511 is not a light emitting diode or a lamp is used. Use a discharge tube.

Xenon discharge tubes have a relatively high required voltage compared to light emitting diodes or lamps. Therefore, the preliminary accumulator 512 takes time to form more preliminary light source 511 operating voltages than when the preliminary light source 511 is a light emitting diode or a lamp.

Accordingly, the red-eye reduction imaging control apparatus according to the third embodiment of the present invention is generally similar to the operation of the second embodiment, but controls the charging operation of the preliminary accumulation unit 512 when the release first stage signal is generated during preliminary light emission. The process is different.

Referring to FIG. 4 briefly, in a state in which the red-eye reduction mode is set according to the output signal of the red-eye reduction switch SW1, the control unit 300 receives the ranging unit 200 and the light metering unit 100 when the release first stage signal is input. ) To receive a signal for focusing and exposure control to perform auto focus and exposure control (S1000, S2000, S3000).

Then, the controller 300 determines whether the second release signal is input (S4000), the second release signal is input, and controls the preliminary light source 511 to emit light for a predetermined preliminary emission time (S5000). It is determined whether there is an input of the release first stage signal during light emission (S6000 and S6100).

Here, when the release first stage signal S21 is input during preliminary light emission, the control unit 300 stops light emission of the preliminary light source 511 (S6200), and an operation voltage capable of emitting the preliminary light source 511 is preliminarily accumulated. Recharging of the preliminary accumulation unit 512 is started to be formed in the unit 512 (S6300).

The controller 300 determines whether recharging is completed (S6400). When recharging is completed, the controller 300 drives the timer 400 (S6500) to determine the set shooting extension time, and when the shooting is extended (S6600), release 2. When the input signal S22 is input (S4000), the preliminary light source 511 again emits light (S5000).

On the other hand, in the determination (S6000), when the preliminary light emission is completed, the control unit 300 emits the light emitting light source 521 so that the main light emission is performed, and at the same time controls to be photographed (S7000, S8000).

The embodiments described above are only one of the most preferred embodiments for achieving the object of the present invention, and the present invention is not limited to the above embodiments.

The present invention has the effect of preventing the waste of the film and improving the reliability of the camera by allowing the flash photographing to be performed in response to the movement of the person as the subject as the preliminary emission during the preliminary emission is regarded as the main emission.

Claims (10)

A red-eye reduction switch which is operated by the photographer and outputs a signal for setting the red-eye reduction mode to be set; A release switch which is operated by the photographer and outputs a release first stage signal informing of the start of shooting and a release two stage signal in which shooting is performed; A light metering unit that detects a brightness of the subject and outputs the same as an electrical signal; In response to the red-eye reduction mode being set according to the output of the red-eye reduction switch, preliminary light emission is controlled to be performed according to the first signal of the release switch for a predetermined time, and the release first stage signal is input again during a time interval before the main emission. A controller configured to perform the preliminary light emission and the main light emission after delaying the main light emission operation by a predetermined delay time; A timer which performs a count operation under the control of the controller and provides information on a set shooting delay time; And And a flash unit configured to irradiate light to the subject by performing preliminary light emission and main light emission under the control of the controller. The method of claim 1, Red-eye reduction, characterized in that consisting of the light-emitting diode for confirmation of confirmation and the light-emitting diode for checking the charge, and further comprising a display unit for performing the point light and the light-off operation indicating the shooting delay in accordance with the control signal output from the controller when the shooting delay Shooting control device. The method of claim 1, The controller controls the preliminary light emission to be performed according to the release first stage signal of the release switch, which is the first signal, and controls the main light emission to be performed according to the release second stage signal of the release switch after the preliminary light emission is performed. Red-eye reduction imaging device characterized in that. The method of claim 1, And the controller controls the preliminary light emission to be performed according to the release two-stage signal of the release switch as the first signal, and controls the main light emission to be performed after the preliminary light emission is performed. The method of claim 1, The flash unit comprises a preliminary light source for emitting preliminary light for preliminary light emission to a subject, a preliminary light source unit for accumulating charge and forming an operating voltage of the preliminary light source; And a main light emitting unit comprising a light emitting light source for emitting the flash light for the main light to the subject and a preliminary accumulating unit for accumulating the applied charge to form an operating voltage of the light emitting light source. Setting a red-eye reduction mode; A second step of performing preliminary light emission according to the first signal of the release switch if the object brightness is low brightness; Determining whether the release first stage signal of the release switch is input again during preliminary light emission; A fourth step of performing the preliminary light emission again after a predetermined delay time and returning to the third step if the release first stage signal is input again in the fourth step; And And if the release first stage signal is not input again in the fourth step, after the preliminary light emission is completed, a fifth step of performing photographing together with the main light emission. The method of claim 6, And the first signal of the second step is a release first stage signal. The method of claim 6, And the first signal of the second step is a release two-stage signal. The method of claim 6, The fourth step, Stopping the preliminary light emission operation as the release first stage signal is input again: starting a time delay by driving a timer, determining whether a time input through the timer is a set time delay, and a time delay And returning to the third step of performing preliminary light emission again after the set time has elapsed. The method of claim 9, The fourth step, And after stopping the preliminary light emission, having a recharging time for a predetermined time period during which the preliminary light emission can be performed again.