JPH0764181A - Self-photographing method for camera - Google Patents

Abstract

PURPOSE:To execute photographing without the divergence of focus, regardless of the point of time of range-finding, in self-timer photographing by a camera having an automatic focusing function. CONSTITUTION:When a self-timer switch 1 is turned on and a detecting means 2 detects the self-timer photographing, a control means 3 actuates a timer 9 and simultaneously, executes the range-finding several times during the time of the timer by a range-finding means 4. The result of the range-finding is stored in a data storage means 5, plural kinds of stored data are taken out after the time of the timer lapses and a true main subject distance is judged by the control means 3. Then, a focus control means 6 moves a lens 8 for focusing via a lens driving means 7, to attain the photographing.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a camera self-photographing method, and more particularly to a camera self-photographing method having an automatic focusing function.

[0002]

2. Description of the Related Art Generally, when performing self-photographing, a self-timer is used which gives a time difference (for example, 10 seconds) of a predetermined time from when the shutter release button is pressed until the shutter actually operates. Further, recently, there are cameras that can perform self-shooting with a remote controller.

[0003]

By the way, in the above-mentioned conventional example, since the distance measurement at the time of self-timer photographing is a few seconds before the self-timer starts or the shutter operates,
It had the following drawbacks. (1) When the main subject is one person, the focus exposure may be infinite. (2) When the self-timer is activated, if you operate it from the front of the camera to start it, the focus exposure will be set very close to the subject. (3) If distance measurement / photometry is performed while the timer is counting, an accurate distance measurement (photometry) date cannot be obtained because the main subject is moving or an obstacle passes by. (4) If distance measurement / photometry is performed immediately before the shutter operation, an obstacle such as a passerby may enter the angle of view, and erroneous distance measurement may be performed.

An object of the present invention is to eliminate the above-mentioned drawbacks of the prior art and to provide a self-photographing method for a camera which does not cause an erroneous operation even when distance measurement and photometry are performed in any state during self-photographing. To do.

[0005]

In order to achieve the above object, the present invention determines the true distance by performing distance measurement a plurality of times and performing aggregate analysis of the plurality of distance data when performing self-photographing. Self-shooting is performed according to the detection sequence. Further, the discrimination sequence A for detecting the true distance data from the maximum number of distance measurement data among the totaled data
It may consist of Further, it may consist of a sequence B for detecting the true distance by weighting the aggregated data on the time axis and making a determination. Further, the maximum value and the minimum value of the plurality of distance data are deleted, the remaining data is added and divided by the number of measurements of the remaining data, and the data closest to the result is used as the distance at the time of shooting. It may consist of the sequence C. Further, it may consist of a sequence in which the sequence A and the sequence C are simultaneously performed.

[0006]

In the self-photographing method of the camera as described above, when the self-photographing is performed by using the detected distance, it is possible to surely prevent the focus shift or the like even when the distance measurement is started by the self-timer or immediately before the photographing.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. FIG. 1 is a block diagram showing the configuration of a camera for this embodiment. In the figure, reference numeral 1 is a self-timer switch which is turned on / off by operation of the camera from comfort, and 2 is a self-timer switch detection means for detecting a state of the timer switch 1 and transmitting the state to a control means 3 described later. Reference numeral 3 is a control means for discriminating the main subject and camera sequence, and 4 is a distance measurement means for measuring the distance to the subject and transmitting the data to the control means 3. Reference numeral 5 is a data storage means for storing the distance measurement data from the distance measurement means 4, and 6 is a focus for controlling a lens driving means 7 described later on the basis of the distance data to the main subject determined by the control means 3. It is a control means.
Reference numeral 7 is a lens driving means for moving a lens 8 described later by the focus control means 6, and 8 is a lens for performing focusing by the lens driving means 7. Reference numeral 9 is a timer which is operated and stopped by the control means 3 and transmits the elapsed time to the control means.

The operation of this embodiment having the above configuration will be described with reference to the flowchart of FIG. First, when the self-timer switch 1 is turned on, in step 1, the self-timer switch detection means 2 detects that it is in the self-timer photographing mode and transmits it to the control means 3. In step 2, the control means 3 activates the timer 9, in step 3 the distance measuring means 4 measures the distance to the main subject, and in step 4, the result is transmitted to the control means 3, and the control means 3 temporarily stores the information. Store in storage means 5.

In step 5, the elapsed time of the timer 9 is checked, and if the predetermined time (for example, 10 seconds) has not been reached, the operations of steps 1 to 3 are repeated. When the predetermined time has been reached, the timer 9 is reset in step 6,
In step 7, a plurality of data once stored is taken out from the data storage means 5, the distance to the main subject is judged by a judgment method described later, and in step 8, the movement amount of the lens 8 is set in the focus control means 6. . In step 9, the focus control means 6 moves the lens 8 via the lens driving means 7 based on the amount of movement, and in step 10, the photographing operation is performed thereafter in the same manner as usual.

Therefore, the determination method in step 7 will be described with reference to FIG. In FIG. 3A, it is assumed that the distance measurement is performed 10 times within a predetermined time, and the result of the distance measurement data (m) is 5, 1, 2, 3, 3, 2, 3, 3.
It is written as 3, 2, 3. For example, if the main subject is one photographer, there is no subject at the start of the self-timer, and the distance is measured to be 5 m. Next, while the photographer is heading to the destination, the distance is measured to be 1 m or 2 m. When it reaches the destination, it stabilizes at 3 m, but when an obstacle passes between the camera and the subject, the distance is erroneously measured at 2 m. Here, the control means 3 discriminates the data taken out from the data storage means 5, and the result shown in the discrimination analysis diagram of FIG.
When m is a maximum of 5 times, the control means 3 determines that the main subject is at a distance of 3 m and performs control.

Next, a second embodiment of the present invention will be described with reference to FIG. In this embodiment, as the main subject distance and the like,
The weighting is changed with respect to the time axis and the comparison is made to determine the main subject. The other structure is similar to that of the first embodiment.

That is, when the main subject is discriminated in step 7 in the flow chart of FIG. 2, the data immediately before photographing (before the timer is stopped) is emphasized as Example 1,
In the case of the distance measurement result shown in FIG. 3A, the final data is emphasized by emphasizing the data 3m of the 10th time and increasing the number of times by 3m data as shown in the discriminant analysis diagram of FIG. To As Example 2, the data at the start of the self-timer is considered important, and the determination is performed in the same manner as in Example 1. As Example 3, the data at the start and the end of the self-timer are regarded as important and the same determination is made.

As a third embodiment of the present invention, a case of discriminating the main subject distance by the discrimination method of the first embodiment will be described with reference to FIG. In the present embodiment, the maximum and minimum values of the distance measurement data in the data storage means 5 are deleted, the remaining data is added, and the measured value closest to the one divided by (distance measurement number-2) is used as the distance measurement data. It is used.

The discrimination method according to this embodiment will be described with reference to the distance measurement data of FIG. 3 described above. Of the 10 distance measurement data from the first 5 m to the 10 th 3 m, 5 m and 1 m are deleted, When the remaining eight data are added, it becomes 2 + 3 + 3 + 2 + 3 + 3 + 2 + 3 = 21, and when this is divided by (distance measurement count-2), it becomes 21 ÷ (10-2) ≈2.6, and the distance measurement data 1m, 2m, 3m, The data closest to 2.6m in 5m is 3m. As a result 3
m is determined as distance measurement data.

A fourth embodiment of the present invention will be described with reference to FIGS. In this embodiment, the discrimination method of the first embodiment and the discrimination method of the third embodiment are used in combination, and the distance measurement data is made more accurate. In the discriminating method according to the present embodiment, as an example 1, as shown in FIG. 5, as a result of the discriminating method of the first embodiment, for example, when judged by the number of times, 3m is 5 times, and 2m is the same number as 5 times and becomes the top. I can't judge. Therefore, if the determination method of the third embodiment is used together, 2 × 5 + 2.5 × 2 + 3 × 5 + 3.5 × 4 = 4344 / (18-2) = 2.68. Therefore,
The judgment result is 3m. Further, as an example 2, as shown in FIG. 5, as a result of the discrimination method of the first embodiment, for example, when judged by the number of times, it becomes, for example, 2 m7 times, 3 m6 times, 3.5 m4 times, and becomes 2 m. It is considered inappropriate to judge that the distance is 2 m depending on the condition and conditions. Therefore, the third
When the calculation is performed using the discrimination method of the embodiment, 2 × 7 + 2.5 × 2 + 3 × 6 + 3.5 × 4 + 4 = 55 55 / (22-2) = 2.75. And
This time, there is not much difference between the 1st place and the 2nd place (less than 5% of the number of shootings), so 2m and 3m are regarded as the same number of times, and 3m is adopted based on the calculated data.

[0016]

As described above, according to the present invention, when the self-timer photographing is performed, the distance measurement is performed plural times, the data is aggregated and analyzed, and the true distance measurement data is detected. The self-switch is turned on to prevent out-of-focus photography due to obstacles such as pedestrians when shooting with distance measurement or distance measurement on the verge of shooting, enabling proper photography.

[Brief description of drawings]

FIG. 1 is a block diagram of a camera using a self-photographing method according to the present invention.

FIG. 2 is a flowchart illustrating the self-photographing operation.

3A and 3B are explanatory diagrams for a method of determining the main subject distance, in which FIG. 3A is a state diagram of distance measurement data, and FIG.

FIG. 4 is a discriminant analysis diagram for a discriminating method according to a second embodiment of the present invention.

FIG. 5 is a first example of a discriminant analysis diagram for a discriminating method according to a fourth embodiment of the present invention.

FIG. 6 is a second example of a discriminant analysis diagram for the discriminating method according to the fourth embodiment of the present invention.

[Explanation of symbols]

1 ... self-timer switch, 2 ... self-timer switch detection means, 3 ... control means, 4 distance measuring means, 5 ...
.Data storage means, 6 ... Focus control means, 7 ...
Lens drive means, 8 ... Lens, 9 ... Timer.

Claims (5)

[Claims] 1. In a sequence for performing self-shooting by operating a predetermined button, distance measurement is performed a plurality of times, distance data corresponding to the subject distance is stored, and the plurality of distance data are aggregated and analyzed to obtain a true result. A self-shooting method for a camera, wherein self-shooting is performed according to a determination sequence for detecting distance data. 2. The self-photographing method for a camera according to claim 1, wherein the discriminating sequence comprises a discriminating sequence A for detecting true distance data from the maximum number of distance measurement data among the totaled data. 3. The self-photographing method for a camera according to claim 1, wherein the discriminating sequence comprises a sequence B for detecting the true distance by weighting the aggregated data on the time axis and discriminating. 4. As a discriminating sequence, the maximum value and the minimum value of the plurality of distance data are deleted, the remaining data is added and divided by the number of times of measurement of the remaining data, and the data closest to the result is obtained. The self-photographing method for a camera according to claim 1, characterized in that it comprises a sequence C used as a distance at the time of photographing. 5. The self-photographing method for a camera according to claim 2, wherein the discrimination sequence is a sequence in which the sequence A and the sequence C are simultaneously performed.