JPS59172632A - Full automatic exposure controlling method of camera - Google Patents

Abstract

PURPOSE:To obtain optimum exposure by selecting automatically one of photographic modes on the basis of outputs of the entire image plane of a subject and a principal subject. CONSTITUTION:The 1st photodetection part which meters light over the entire subject image surface or a wide range and the 2nd photodetection part which meters light within a narrow range of the principal subject. The output EV1 of the 1st photodetection part, output EV2 of the 2nd photodetection part, output difference deltaEV between the 1st and 2nd photodetection parts, and a specific reference value C are used to the subject image plane into plural image plane patterns I , II, III, and VI previously. Then, a camera is provided with plural photographic modes M1, M2, M3, and M4 corresponding to said patterns including the use of a strobe. A image plane pattern corresponding to the subject is found on the basis of the outputs EV1 and EV2 and the photographic mode suitable to the pattern is selected, so optimum exposure is obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Fields> The present invention relates to a fully automatic exposure control method for a camera, and more specifically relates to a fully automatic exposure control method for a camera that uses a camera. (Prior art) When the brightness distribution of the subject is significant, for example, when brightness values are significantly different between the whole screen average metering and the part 8 (1j light), it is difficult to decide which metering format to use. However, in general, a metering format is selected that will give the main subject an appropriate exposure.However, with conventional cameras, the brightness of the entire screen is taken into account for the subject pattern of the taneyu. However, it was impossible to obtain the proper exposure for the main subject.In other words, it was necessary to use aperture metering, weighted average metering, auto flash, etc., and operate the camera in a way that was as close to this intention as possible. However, even with this, it is difficult to obtain proper exposure, and it is impossible for a person who is not indignant to use such a photographic technique, so improvements are desired.I'-6 (IX'-I aspect of the invention) The present invention has been made in view of this point, and its purpose is to
Use the 1-1 COBO light in combination to achieve the optimal exposure for subjects that require a variety of brightness! The object of the present invention is to provide a fully automatic exposure control method for a camera. (Composition of Defence) The present invention that achieves this object has a first light receiving section that measures the entire subject screen or a wide range, and a second light receiving section that measures a narrow range that focuses on the main subject. a light receiving section, and using at least the output of the first light receiving section, the output of the second light receiving section, the output difference between the first and second light receiving sections, and a predetermined reference value. The subject screen is classified into multiple 1f1) patterns in advance.

[ノ[One response to each pattern and one response!] ~Multiple shooting including the use of a robot [-1- is prepared in the camera, and when shooting, at least the above shooting mode is set based on the outputs of the first and second light receiving sections. It is characterized by automatically selecting one of them. (Example) Examples of the present invention will be described in detail below. First, an example of classification of screen patterns in the present invention will be described. The present invention includes a first light receiving section that measures the entire subject screen or a wide range (hereinafter, the case of the entire screen will be explained as an example), and a second light receiving section that measures the light of a narrow range of the main subject. The condition is that the camera has the following. Here - (, the screen to be used as the center of the first light receiving section is
For example, the wide screen defined by the acceptance angle of 30°, the target screen of the second light receiving section is a narrow range screen defined by the acceptance angle of 10', and the brightness value input to the AE device is The output of the first or second light receiving section or both light receiving sections is used. In addition, in the present invention, it is a rule to use a strobe for L-1~, which consists of L-1.
For example, 2m) may also exceed one of the standard values for screen pattern classification. Therefore, the average brightness value of the entire screen is calculated by the output of the first light receiving section.
lE, V+, this E, the reference value to which V l is compared (
Hereinafter, 54 Q + - average value) is A, and the luminance value of the main subject (output of the second light receiving section) is EV2.
2 is compared with the base qL value (hereinafter referred to as ia iE reference value) is B, and the output of the first and second light receiving sections is JAYΔE.
The reference values with which V = E V l - E V 2 are compared are CI, C2 (in the following explanation, CI is assumed to be zero, C2 = C, and the predetermined brightness difference C is expressed), and the strobe light An example of the classification of screen patterns is as follows: 1(i) The average brightness value EVI of the entire screen is less than the standard average 1ici△, but the xqt of the main subject
The melon value EV2 is distributed with −b patterns brighter than the appropriate N quasi+ffi 2. [For example, take one spotlight and try to get the closest shadow of the person being illuminated] 14 patterns - 1 (II) The average luminance value EV of the entire both sides is less than the standard average value A, and J, where the brightness value E V 2 of the main subject is less than the appropriate reference value B, a distribution with a dark pattern. [For example, when the entire screen is dark, such as in the evening or indoors, pattern 1 (Ila > average brightness of the entire screen t + f + IE V I is less than the reference average value A, and the main The luminance value EV2 of the subject is appropriate i [Reference value B
Distribution of b patterns when the brightness values E and V2 of the next main subject are positive when the average brightness value of the entire screen at that time is EVI~-. 1 For example, in the state shown in (n), pattern 1 when the main subject is relatively dark (lTb) The average luminance of the entire screen 1fIFV ] is less than the average value Δ, and the luminance value of the main subject [' :V2
11r1 is lower than the appropriate standard value B, and the average brightness value of the entire screen at that time - the brightness value of the main subject at that time EV2 is zero or negative. ) distribution. [For example, in a situation like IJ゛, (I)>, pattern 1 when the subject is -1 required or relatively dark (III) The average brightness of the entire screen (iti EV) is set to a certain standard brightness value to the standard average value , and the average brightness of the rib screen rest (lli I:i V I
- A distribution having a pattern where the brightness value EV2 of the main subject is a predetermined brightness difference of 0 (for example, a small brightness difference within 2 [v>). When I want to honor a person who is in the shade of a tree, J:
pattern in a semi-transparent state] (Illa) The average brightness value of the entire screen E V 1 is 11r
Episode 1: The brightness exceeds the quasi-average drawing Δ, and the brightness is 0 at b-
The average decoration degree value of the entire screen of 1 - the brightness of the main east cover'l no body (lli IE V 2's value is within the above-mentioned predetermined difference C and is positive.) For example, a state C′ such as (Ill >, a semi-transparent @combination pattern where the main object is relatively dark) (l [1l)
) When the average luminance value F' V + of the entire screen exceeds the basic average value A, then the average Th' of the entire screen at that time
Q intensity value E,' V + - brightness value of main object E V
A distribution having a pattern in which the value of 2 is within the predetermined luminance difference C and is zero or negative, 2 [Pattern in a condition that can generally be called front lighting] (IV) Average reduction (degree of reduction) of the entire screen. If the brightness exceeds the value EVtSaU quasi-average value A, then the average brightness value of the entire screen at that time E
V 1 - Luminance of main subject at that time 11i:i IE
A distribution with a pattern where the value of V2 is a large brightness difference exceeding the predetermined brightness 2'A (/. [Pattern in a state that can generally be said to be backlit] NVa) Average brightness value E of the entire screen The average brightness value E of the entire screen is 11, with brightness exceeding V
Luminance value L of the subject t'y5 when V 1 -Mo = V
2 is a large brightness difference that exceeds the predetermined 1LIF degree difference C, and the withdrawal distance 11111 U is greater than the predetermined luminous distance fi.
l11. If the pattern is within D -, ) min A++,. U Pattern 1 (R1b), which can generally be said to be backlit.
Screen 9 body (Dilt uniform Wilt rU (ff
li E V 1 exceeds the standard average value A, and the average brightness of the entire screen at that time IF-f F-V,
- What is the brightness value EV of the 14 objects on the paper? is a large luminance difference in which the value of C exceeds the predetermined luminance difference C, and has a pattern in which the value exceeds the pattern distance (J is the predetermined luminance distance 1). Pattern 1 in a state that can be said to be backlit.
In the case of the pattern 1), it is quite conceivable that a shadow distance of 11υ is involved. Among the above screen patterns, the terminal screen pattern is meaningful as a classification of screen patterns. That is, (I>, (Ila>, (Ill)>. <l1la), (I[[l)), (I
Va) and NVb) have meaning. If you want to always get the correct exposure for subjects with these screen patterns, you need to combine the △E device, the Susuro Kosou Glue, the Norassiko Magic device, and the Distance System-13 section device in the F hand.C I have no choice but to take pictures 1. Accordingly, in the present invention, the above-mentioned devices are organically combined to automatically obtain the appropriate exposure for the screen patterns classified in this way. Correspondingly, a C-layer mode is available.An example is as follows: (1) For the <I> pattern, the main subject is bright enough, so a strobe is used. <M1 mode> in which the AE device is used alone without using it. (2) For the above <1' [a) pattern, the main subject is 11g, so the maximum strobe light intensity is used, and the
One ΔE mounting (7)) 1] L, tej door shape (
M2 mode) 1° (3) The above (Il'b) pattern and the above (Iffa)
As for the pattern, both sides are the main backlight pattern, so I used some of the strobe light 41 and also used the 7.11 AE device to shoot C (M3U need). In addition, above (1) ~
In the case of (3), because the diameter of the aperture due to A-to-equipment is large,
4. Changes in aperture diameter due to Flashmatic take priority. (4) For the above (lllb> pattern, it is a condition that can be said to be general front lighting, so it is possible to imitate it using only the A [device (Ml mode) without using the robot). ). (5) N+71'+ (IVa>%J L in pattern
'u is in the backlit state of 3a, :rEi m1lC, so the S(-Robo light 1 is maximized, and the E device is also (Jf for yG) to the 11th (In this case, normally A In the E device, the diameter becomes smaller, and the diameter of this aperture becomes smaller.
(M2'E-
). (6) For i) et al. (■\11)) pattern,
Since it is a long-distance backlit situation, I set the lens to maximum, set the 11 △ 1- device, M inactive, and set the lens to 1 to 1 to shoot with the determined aperture diameter. (M
4I need). The accompanying drawing shows the screen pattern classification and appearance described in L, and the number 0 (, Cl in the camera according to the procedure shown in the figure). 1) For optimal exposure! ] If the copying mode is not selected, the above standard average value may cause hand digging. It is determined using the brightness (if) at which photography can be taken with the ΔE device in general front-light conditions while ensuring a certain level of swivel speed. However, the two ministries do not necessarily need to have the same 1. As described above, according to the present invention, the first light receiving section that measures all or most of the subject screen and the second light receiving section that measures the main subject are installed, and from their outputs It selects the screen pattern that matches the subject and selects the shooting shade that is most suitable for that pattern.
” is a monkey.

[Brief explanation of the drawing]

The figure shows one step of carrying out the method of the invention - Flowchart A7. EV+...Average brightness ratio of the entire subject screen EV2...
Luminance value of the subject on the dirt floor

Claims (3)

[Claims] (1) A first light-receiving section that measures the entirety of the subject screen or a wide range, and a second light-receiving section that measures a narrow range of the main subject, and at least the first light-receiving section Using the output of the light receiving section, the output of the second light receiving section, the difference in the output angle of the first and second light receiving sections, and a predetermined reference value, the subject screen is classified in advance into a plurality of screen patterns, and Depending on the pattern, I took multiple shots, including using a strobe, and prepared one in the camera.
fully automatic exposure control of the camera, wherein one of the photographing modes is automatically selected based on the outputs of at least the first and second light-receiving sections when the photograph is taken. Method. (2) As the reference value, one used for comparison with the output of the first light receiving section and one used for comparison with the output of the second light receiving section are prepared. A fully automatic exposure control method for a camera according to claim 1. (3) The camera according to claim 1, characterized in that when classifying into the plurality of screen patterns and selecting the shooting mode, the closest shadow distance (H month) is also used (Claim g1! (4) As a photographing mode, at least (a) a photographing mode using only the Δ[device], a ΔE device, a flash magic device, and a part of the light intensity of the flash A shooting mode that uses the AE device in parallel with the Fludge 3matic neck attachment and the full light intensity of the strobe (d) A shooting mode that uses only the full light intensity of the Fludge Comadec device and the strobe 4. A fully automatic exposure control method for a camera according to claim 3, characterized in that four shooting modes are prepared in a single shooting mode. (i) As reference values, those used for comparison with the output J of the first light receiving section, those used for comparing the output of the second light receiving section, and those used for comparison with the photographing distance signal. A fully automatic exposure system for a camera according to claim 3 or 4, characterized in that: (6) The reference value used for comparison with the output angle of the first light receiving section and the reference value used for comparing the output horn of the second light receiving section are set to be equal. Range 2nd
56. Fully automatic exposure control method for a camera according to item 55. (7) Special Yf characterized in that the output of the autofocus A71 adjustment device of the camera is used as the projection distance 111 [1 signal]
A fully automatic exposure control method for a camera according to claim 3 or 5. (8) The automatic exposure control method for a camera according to item 3 or F), characterized in that the output of an autofocus manual rangefinder of the camera is used as the photographing distance signal. ,.