KR100354427B1 - Camera with photographing result display function and control method thereof - Google Patents

Abstract

PURPOSE: A camera with a function for displaying a photographing result and a method for controlling the same are provided for a user to easily check whether a photographing is carried out normally on the basis of luminance and distance of a subject. CONSTITUTION: A method for controlling a camera with a function for displaying a photographing result includes the steps of determining whether a release switch is driven in stage 1 after initiating all variables in response to power supply, measuring a first distance and a first luminance, determining whether the release switch is driven in stage 2 after calculating a proper exposure and a focus control amount according to the first distance and the first luminance, carrying out the photographing by the calculated focus control amount and the exposure, measuring a second luminance reflected on a film surface after the projection via an orifice and converting a position of a lens to measure a second distance, calculating a difference between the first and second luminance(S210), calculating a difference between the first and second distances(S220), determining whether the luminance difference is in a first set range(S230), determining whether the distance difference is in a second set range(S240), and displaying the photographing result on the basis of the determination(S250,S260).

Description

Camera having a shooting result status display function and control method thereof

The present invention relates to a camera having a shooting status display function and a control method thereof. More specifically, the present invention relates to a camera that performs shooting operation in a camera and then displays whether shooting is performed properly according to the measured luminance and distance of the subject. The present invention relates to a camera having a status display function and a control method thereof.

In general, when the user presses the recording button, the camera photographs the image by measuring the brightness and distance of the subject and calculating the exposure amount and AF (auto focusing) amount accordingly.

Conventionally, the user can know whether the shooting mode is set according to the shooting operation of the camera or the number of film, etc. through the display device of the camera, but it is determined whether the shooting is properly performed according to the measured subject information. You need to develop the film to find out.

Therefore, in the related art, since the photographer cannot know whether the photographing is properly performed according to the measured subject information, the photographing is always performed in an unstable state.

In addition, since the photographing result is known only at the time of development, a disadvantage arises in that the photographing result of the important subject is missed when the desired subject photographing is not properly performed.

Therefore, an object of the present invention is to solve the above-mentioned disadvantages, and after performing a shooting operation in the camera, it is displayed whether or not shooting is performed properly according to the measured luminance amount and distance of the subject. An object of the present invention is to provide a camera having a photographing result status display function for informing a status and a control method thereof.

The configuration of the present invention for achieving the above object is

A release switch for changing an operation state from one stage to two stages according to a user's shooting operation selection and outputting an electrical signal corresponding thereto;

First luminance metering means for measuring an amount of luminance of an object and outputting an electrical signal corresponding thereto when the first stage of the release switch is operated;

Automatic ranging means for measuring a distance to a subject and performing focus adjustment to a corresponding position when the first stage of the release switch is operated;

A second luminance metering means for operating the second stage of the release switch to measure an amount of luminance of the object light information input when the image is reflected on the film surface and to output an electrical signal corresponding thereto;

Lens position sensing means for sensing an outgoing position of the lens moving according to focus adjustment and outputting an electrical signal corresponding thereto;

When the first stage of the release switch is activated, the subject brightness and distance are measured to calculate the exposure amount and the focus adjustment amount. When the second stage of the release switch is operated, the photographing signal is output according to the calculated exposure amount and the focus adjustment amount. The amount of luminance reflected on the film surface and the position of the lens according to the focus adjustment are detected, and the set range of the difference between the luminance value of the object measured before shooting and the luminance reflected on the film during shooting is satisfied. Photographing control means for determining whether a difference value between the subject distance converted according to the subject distance and the detected lens extraction position satisfies the setting range, and outputs an information signal corresponding to the determined photographing result state;

Shutter driving means for performing a photographing operation according to a photographing signal output from said photographing control means;

The operation state is changed according to the information signal output from the photographing control means, and the information display means is configured to display corresponding information.

Another configuration of the present invention for achieving the above object,

Initializing all use variables when power is supplied to the camera, and then determining whether the release switch is operated in one stage;

Measuring a subject distance and a luminance amount when the first stage of the release switch is operated;

Calculating an appropriate exposure amount and focus adjustment amount according to the measured object luminance amount and distance, and then determining whether two release switches are operated;

Performing shooting according to the calculated focus adjustment amount and exposure amount when the second stage of the release switch is operated;

Measuring the luminance of the subject reflected on the film surface in accordance with the shooting operation and the position of the extracted lens according to the focus adjustment;

Calculating a difference value between the subject luminance measured before the photographing and the luminance reflected on the film surface during the photographing;

Calculating a difference value between a subject distance measured before shooting and a subject distance calculated according to a measured lens position;

The method may include determining whether the calculated difference in the luminance level of the subject before and after photographing and the difference in the subject distance before and after photographing do not satisfy the setting range, and displaying the photographing result state according to the determined result.

Referring to the accompanying drawings, the most preferred embodiment which can easily practice this invention by the said structure is as follows.

1 is a block diagram of a camera having a shooting status display function according to an embodiment of the present invention,

2A and 2B are flowcharts of operations of a camera having a shooting status display function according to an embodiment of the present invention.

As shown in FIG. 1, the configuration of the photographing result display apparatus according to the exemplary embodiment of the present invention may be performed according to the release switch S1, the first luminance metering unit 10 for measuring the luminance of the subject, and the photographing operation. The second luminance meter 20 to measure the amount of luminance reflected on the film surface, the automatic metering unit 30 to measure the subject distance, and the encoder 40 to measure the position of the lens to be fed out according to the focus adjustment And a shooting control unit 50 for taking a picture in accordance with a signal applied to an output terminal of the release switch S1 and the measuring means 10 to 40 to determine a state of a shooting result and outputting a corresponding information signal. The shutter driver 60 is connected to the output terminal of the photographing controller 50 to perform photographing, and the information display unit 70 is connected to the output terminal of the photographing controller 50 to display a photographing result.

The second luminance meter 20 according to an embodiment of the present invention is mounted at a position that does not affect image formation between the aperture and the film into which light is incident, and is incident through the aperture opened according to a photographing operation. It consists of an optical sensor for measuring the amount of brightness of light reflected on the film surface.

The operation of the camera having the shooting result status display function according to the embodiment of the present invention by the above configuration is as follows.

When power is applied to the camera, the photographing controller 50 initializes all variables used in the control routine (S110), and then determines whether the user selects a photographing operation (S120).

When the user presses a release button (not shown), the release switch S1 operates as a release 1 stage. In the above, when the release switch S1 is operated in the first release stage, the capturing controller 50 measures the amount of luminance of the subject to be photographed and the subject distance (S130 to S140).

The first luminance metering unit 10 detects the input luminance amount of the object (L1: first luminance amount) and outputs an electric signal corresponding to the shooting luminance level to the photographing controller 50. The electronic device operates according to the driving signal output from 50 to detect the subject distance D1 (first distance), and outputs an electrical signal corresponding to the photographing controller 50.

In the above, the photographing controller 50 calculates an appropriate exposure amount and focus adjustment amount according to a set expression according to the detected object luminance amount L1 and distance D1 (S150), and then the release switch S1 releases the second stage. It is determined whether the operation (S160).

When the release switch S1 is operated in the second release stage, the photographing controller 50 controls the lens according to the calculated focus adjustment amount and operates the shutter driver 60 according to the calculated exposure amount to perform photographing ( S170).

While the photographing operation is performed, that is, while the shutter is opened, the second luminance metering unit 20 detects the luminance amount (L2: second luminance amount) of the light incident through the aperture and reflected on the film surface and corresponds to the second luminance meter. The electrical signal is output to the photographing controller 50 (S180).

In addition, the encoder 40 detects the position of the lens fed to the corresponding focus adjustment position according to the photographing operation, and outputs an electrical signal corresponding thereto to the photographing controller 50 (S190).

In operation S200, the photographing controller 50 detects a position of the extracted lens for focus adjustment according to a photographing operation, and converts another subject distance (D2: second distance) to the detected lens extraction position (S200). Next, the difference value T1 between the luminance amount L1 measured before shooting and the luminance amount L2 measured at the time of shooting is calculated (S210), and the subject distance D1 measured at the time of shooting and the shooting is taken. The difference value T2 from the subject distance D2 converted according to the visual lens extraction position is calculated (S220).

In addition, the photographing controller 50 determines that the difference value T1 of the object brightness amount L1 and the brightness amount L2 measured in this way, the difference value D2 of the object distance D1 and the distance D2 are determined. Determine whether each setting range is satisfied.

The photographing control unit 50 falls within a first setting range corresponding to a case where an appropriate value of the difference between the luminance amount L1 before shooting and the luminance amount L2 reflected and measured on the film surface is calculated. If not, it is determined whether the difference value between the respective object distances D1 and D2 falls within the second setting range (S230 to S240).

In the above, the photographing controller 50 is a second value corresponding to the case where the difference between the subject distance D1 measured before shooting and the subject distance D2 according to the extracted lens position according to the photographing operation is precisely adjusted. If it is not within the setting range, it is determined that photographing of the appropriate exposure according to the measured luminance amount and distance of the subject is not performed properly, and an information signal for displaying a photographing failure state is output to the information display unit 70.

The information display unit 70 changes the operation state according to the information signal output from the photographing control unit 50 to indicate to the user that the current photographing is not performed properly (S250).

In the above, the photographing control unit 50 is within the first setting range corresponding to the case where the difference value between the luminance amount L1 of the subject before shooting calculated above and the luminance amount L2 reflected and measured on the film surface is appropriately exposed. If the difference between the measured subject distance D1 and the subject distance D2 according to the lens position extracted according to the photographing operation falls within the second setting range corresponding to accurate focusing, the measurement is performed. By properly displaying the appropriate exposure according to the amount of the luminance and the distance of the subject is displayed properly, and outputs an information signal for indicating the shooting good state to the government display unit (70).

The information display unit 70 changes the operation state according to the information signal output from the shooting control unit 50 to indicate to the user that the current shooting is properly performed, and then ends (S260 to S270).

As described above, after performing the photographing operation in the camera according to the embodiment of the present invention, by displaying whether or not the photographing according to the measured subject brightness and distance is properly performed, the photographer can easily know the photographing result state. have.

In addition, since the current photographing result can be readily known, a camera having a photographing result status display function having an effect of having an opportunity to photograph again when the photographing is not performed properly at the time of capturing an important moment, and its A control method can be provided.

1 is a block diagram of a camera having a shooting status display function according to an embodiment of the present invention,

2A and 2B are flowcharts of operations of a camera having a shooting status display function according to an embodiment of the present invention.

Claims (3)

When the camera is powered up, it initializes all the usage parameters and then determines whether the release switch is operating in release 1 stage: Measuring the first distance and the first luminance amount that are the object distances when the release switch is operated in the first release stage; Calculating an appropriate exposure amount and focus adjustment amount according to the measured first distance and the first luminance amount, and then determining whether the release switch is operated in the second release step; Photographing according to the calculated focus control amount and exposure amount when the release switch is operated in the second release step; Measuring a second luminance amount incident through the iris according to a photographing operation and reflected on the film surface, and measuring a second distance, which is a subject distance, by converting a position of a lens that is extracted according to focus adjustment; Calculating a difference value between the first luminance amount measured before the shooting and the second luminance amount measured at the time of shooting; Calculating a difference value between the first distance measured before the shooting and the second distance measured at the time of shooting; Determining whether a difference value between the first luminance amount and the second luminance amount falls within a first setting range; Determining whether a difference between the first distance and the second distance falls within a second preset range; And And displaying a shooting result state based on the determination result. The method of claim 1, wherein the displaying of the photographing result state comprises: When the difference value between the first luminance amount and the second luminance amount does not fall within the first setting range and the difference between the first distance and the second distance does not fall within the second setting range, The control method of the camera having a shooting result display function characterized in that it is determined that the proper exposure is not properly taken according to the quantity and distance, indicating that the shooting is poor. The method of claim 1, wherein the displaying of the photographing result state comprises: When the difference value between the first luminance amount and the second luminance amount is within the first setting range, or when the difference value between the first distance and the second distance is within the second setting range, The camera control method having a shooting result status display function of judging that shooting of a proper exposure according to a distance has been properly performed, and displaying a shooting good status.