JPS637330B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is a method for measuring light by dividing a field into a plurality of regions, and determining the proper exposure of the entire screen from a plurality of photoelectric outputs corresponding to the plurality of regions. This invention relates to a multi-photometering device that calculates and extracts output.

Conventionally, as this type of photometric device, there is one that uses the arithmetic average value of the maximum and minimum values of multiple photoelectric outputs as the appropriate photometric output (Utility Model Publication No. 51-9271), and one that uses the arithmetic average value of the maximum and minimum values of multiple photoelectric outputs as the appropriate photometric output. There is a method in which a photographer manually extracts an intermediate value and uses this intermediate value as an appropriate photometric output (Japanese Patent Laid-Open No. 17725/1983).

However, these conventional devices have the following drawbacks. In other words, in the former case, the exposure is determined by the arithmetic average value, so the main subject may be underexposed or overexposed under special field conditions, such as backlight or when the main subject is on snow. Sometimes I put it away. Furthermore, even in the latter case, it not only requires skill to set the intermediate value to provide proper exposure under the above-mentioned special field conditions, but also the setting operation is manual, which inevitably reduces operability.

An object of the present invention is to provide a multi-photometering device that analyzes the situation of the photographic field based on the photoelectric output and is capable of obtaining appropriate photometry output even for the photographic field under the special conditions described above. It is to provide.

According to the present invention, a plurality of photoelectric outputs are generated by dividing a field into a plurality of areas and photometrically measuring the field, and standardizing the plurality of photoelectric outputs based on an average output of the plurality of photoelectric outputs. A multi-photometering device is provided that classifies a field based on a standardized output and calculates and extracts an appropriate photometering output based on the classified output. According to this device, multiple photoelectric outputs are normalized by the average value of multiple photoelectric outputs and the conditions of the photographic field are analyzed, so the conditions of the photographic field can be accurately detected. This makes it possible to effectively obtain an appropriate photometric output according to the field conditions. below,
The book is illustrated by Figure 1, which represents the screen and the brightness of each part of the screen as a three-dimensional figure, with the field of view (hereinafter referred to as the screen) as the bottom and the brightness of each part of the screen as the height (vertical axis). Describe the basic idea of the invention. 1st a
In the figure, when considering a screen as shown on the bottom surface S ₀ , the brightness of the screen determines one curved surface S ₁ . In reality, since photometry is performed using a finite number of photoelectric elements, the curved surface that can be captured is a collection of planes with the same number or fewer as there are photoelectric elements. For example, if the screen is divided vertically, horizontally and horizontally using four photoelectric elements, the curved surface showing the brightness of the screen will be the first one.
The quantization is performed stepwise as shown by quantization planes S ₂ to _{S 4} in figures b and c. When comparing quantization planes S ₂ and S ₄ , the absolute level of the luminance that makes up the quantization planes is the same, but their positions on the screen are different, so it is difficult to determine which luminance should be properly exposed. The judgment on whether or not to get it is also different. Also, when comparing quantization planes S ₂ and S ₃ , the level difference between adjacent luminances is equal, but
Since the absolute value of brightness between the two quantization planes is different, the determination to obtain the appropriate exposure will also be different. Now, we classify the shooting screen under all conditions into multiple categories based on information regarding brightness and information regarding position, and determine which brightness should be controlled for exposure in each category to obtain an overall appropriate exposure. Attach the correspondence. Then, on a screen under certain conditions, the brightness at which exposure control should be performed can be obtained from the information regarding the brightness and the information regarding the position.

In fact, as a result of making the above correspondences for screens under various conditions, it has been found that the brightness at which exposure control should be performed in order to obtain properly exposed photographs converges to the following three levels. That is, the first brightness level is the maximum value among the plurality of photometric outputs,
The second brightness level is a level that approximately matches the average value of these photometric outputs, and the third brightness level is the minimum value of these photometric outputs. It was found that these values exist between the values and the average values of these photometric outputs.
This average value can be approximated by an average value, median value, or mode.

From the above, if we compare the average value of multiple photoelectric outputs with each photoelectric output and standardize the brightness of each divided screen, we can simultaneously obtain information on the position and brightness of each screen. You will be able to do this. Therefore, if the state of the screen is detected by pattern analysis based on this normalized output, and this detection result is correlated experimentally or empirically with the above three brightness levels, exposure control for the screen under various conditions can be achieved. You can choose the brightness level you want.

On the other hand, the brightness level at which exposure should be controlled may be determined independently of pattern analysis. The difference between the maximum brightness and the minimum brightness is within a predetermined range, there is little variation in brightness within the screen, the maximum brightness is within a predetermined range, and there are bright light sources such as the sun or spots on the screen. This is a case where it can be determined that there is no artificial light source such as a light. In this case, it has been found that good results can be obtained by adjusting the exposure for the second brightness level.
Note that the above-mentioned standardization of multiple photoelectric outputs involves detecting the magnitude relationship of the multiple photoelectric outputs with respect to the average value of the multiple photoelectric outputs, and standardizing each photoelectric output to a specific value according to the magnitude. It is to replace it with a signal.

Hereinafter, the present invention will be explained based on examples. Second
The figure is a block diagram showing an embodiment of the present invention. In the same figure; the photometry circuit 10 includes a photoelectric conversion element for photometering each region of the field of view divided into a plurality of regions, and outputs independent analog photoelectric outputs P ₀ to _{P o-1} corresponding to each region of the field of view. Output. This photoelectric output P ₀ ~
It is assumed that P _o-1 is logarithmically compressed, and therefore the photoelectric output is expressed as a BV value. Maximum value detection circuit 11
inputs the photoelectric outputs P ₀ to _{P o-1} and detects the maximum value P _nax from among them. The average value detection circuit 12 receives the photoelectric outputs P ₀ to P _o-1 as input, and detects their average value, for example, the average value P _neao . The minimum value detection circuit 13 receives the photoelectric outputs P ₀ to _{P o-1} as input, and detects the minimum value P _nio from among these. The arithmetic circuit 14 receives the maximum value _Pnax and the average value _Pneao as input and generates the first photometric output PH (BV), that is, PH= _k1Pnax + ₍ 1- _k1 ) _Pneo ...(1) . The arithmetic circuit 15 outputs the second photometric output PM.
(BV), that is, PM=P _neao (2), and can actually be used as the average value detection circuit 12. The arithmetic circuit 16 calculates the minimum value P _nio and the average value
The third photometric output PL (BV) with P _neao as input,
That is, PL _{= k2Pnio} +(1- _k2 ) _Pneo ...(3) is generated. The circuits 11 to 16 described above constitute an appropriate photometric output generation circuit.

The binarization circuit 17 is a part that performs standardization,
Input the photoelectric output P ₀ ~ _{P o-1} and the average value P _neao ,
The reference output generated based on the average value P _neao is compared with the photometric outputs P ₀ to _{P o-1} to convert each photoelectric output into a logical output. Specifically, in the example, i
The output P _o-1 at the th position is compared with the average value P _neao , and it is set to 1 if P _o-1 ≧P _neao , and 0 if P _o-1 <P _neao . If the normalized output is 1, then i
The th position indicates that the area is brighter than the average, and 0 indicates that it is a darker area. That is, the standardization described above takes the form of binarization.

Alternatively, you can do the following. As a reference output based on the average value P _neao to divide the overall brightness into bright, dark, and intermediate parts.
In this method, P _neao +δH and P _neao −δL are set, and binarization is performed for each of these two reference levels. In other words, when Pi>P _neao + δH holds, 1, Pi≦P _neao
It is set to 0 when +δH holds, 1 when Pi≧P _neao −δL, and 0 when Pi<P _neao −δL. In this case, the binarized output at the i-th position is two (2 bits). When the outputs are arranged in the order of comparison of P _neao + δH and P _neao − δL, if the output is 11, it indicates a bright part,
00 indicates a dark area, 01 indicates an area close to the average value (10 does not exist). By dividing the brightness at that position into three levels in this way, more advanced pattern analysis becomes possible.

Of course, it is also possible to divide the binarization circuit into four or more stages, and the way of division may be changed depending on the position.

Next, the first judgment circuit 18 takes the maximum value P _nax as input, judges Pα≦P _nax ≦Pβ (4) (where Pα and Pβ are constants), and generates a logical output representing the judgment result. do. Of course, the first determination circuit 18 is Pα,
Includes a circuit that generates a reference output corresponding to Pβ.
This determination operation is performed to identify whether the maximum value P _nax is caused by a bright light source including the sun or an artificial light source such as a spotlight. The second judgment circuit 19 inputs the maximum value P _nax and the minimum value P _nio , calculates ΔP=P _nax −P _nio (5), and then α≦ΔP≦β (where α and β are constants). ) ...(6) is made and a logic output representing the judgment result is generated. Of course, the second determination circuit 19 includes a circuit that generates reference outputs corresponding to the constants α and β. This judgment operation judges the brightness distribution within the screen, and for example, if the brightness distribution is large and the main subject is on the low brightness side, if you adjust the exposure to the low brightness side, the high brightness side will be off, or vice versa. This is done to prevent the phenomenon where if the main subject is on the high-brightness side and the exposure is adjusted to the high-brightness side, the low-brightness side will be destroyed.

The classification circuit 20 receives the logic outputs from the circuits 17, 18, and 19 and determines, that is, categorizes, which of the predetermined categories the combinational logic of these logic outputs belongs to. This predetermined category is divided into three, and a control output corresponding to each category is selectively generated. Circuits 14, 15, 16
Analog switches 21, 22, and 23 connected between the categorization circuit 20 and the apex calculation circuit 24 correspond to categories classified from among the first to third photometric outputs according to the control output of the classification circuit 20. The output is selected and transmitted to the apex calculation circuit 24.

The apex calculation circuit 24 generates an output corresponding to an appropriate exposure value (shutter speed, aperture value) based on the selected photometric output and other exposure factors from the information setting section 27, and converts this output into a known exposure value. Control circuit 2
5 and the exposure display circuit 26.

Next, the operation and the mode of classification by the classification circuit 20 will be described in the case where the screen is divided into three and five parts and photometry is performed. Figures 3a and 3b show how the screen is divided and the photoelectric output of each divided area.

(1) In Figure 3a, the screen assumes a 6x6 camera, with a central area Dc, an upper area Du, and a lower area.
It is divided into Dl, and the photoelectric output of each is represented by P ₀ to _{P 2} .

Each photoelectric output P ₀ to _{P 2} is the average value P _neao (=(P ₀ +
P ₁ + P ₂ )/3), and each region is P ₀ ~ _{P 2}
When ≧P _neao , it is expressed as a logical value of 1, and
When P ₀ to P ₂ <P _neao , it is represented by a logical value of 0. The classification circuit 20 determines whether this combination of logical values is (i)
When the central area Dc is 0 or the lower area Dl is 0
(At this time, the main subject is the area Dc or Dl
), the analog switch 23 is turned on and the third photometric output Pl is transmitted to the apex calculation circuit 24. (ii) Central region
When Dc is 1 (at this time, the main subject is the area Dc
), the analog switch 21 is turned on and the first photometric output PH is transmitted to the apex calculation circuit 24.

On the other hand, the first determination circuit 18 outputs a logical value of 1 when Pα≦P _nax ≦Pβ.
At other times, an output of logical value 0 is generated. The second determination circuit 19 generates an output of logical value 1 when α≦ΔP≦β, and generates an output of logical value 0 otherwise. Then, when the logic value 1 is applied from the first and second determination circuits 18 and 19, the classification circuit 20 determines whether the screen is
Even in the state of (ii), the analog switch 22 is turned on and the second photometry output takes priority over this.
The PM is transmitted to the apex calculation circuit 24.

(2) In Figure 3b, assuming a Leica camera, the screen has a central area Dc, an upper right area Dru,
Lower right area Dr, upper left area Dlu, lower left area
It is divided into Dll, and the photoelectric output of each is represented by _P0 to _P4 . Each photoelectric output P ₀ to _{P 4} is compared with the average value P _neao in the same way as described above, and each region has a logical value of 1.
Or represented by 0.

The classification circuit 20 has this combination in the (i) central area.
When Dc is 0, or the left and right lower areas Dll, and
When Drl is 0, or when the upper left area Dlu and the lower left area Dll are 0, or when the upper right area Dru and the lower right area Drl are 0, (in these cases, the main subject exists in the area 0. (There is a high possibility that the
The photometric output PL of is transmitted to the apex calculation circuit 24. Other than this, the operation is the same as described in section (1). This five-division example takes into consideration the fact that there are vertical and horizontal photographing positions, such as in a Leica camera.

The photometric output calculated and extracted in this manner is subjected to apex calculation and applied to the exposure control circuit 25 and the exposure display circuit 26. In this embodiment, the apex calculation is performed after the photometric output is extracted, but the invention is not limited to this, and the apex calculation is performed immediately on the photoelectric output and the circuits 11 to 13
17. At this time, although the level of the output after performing apex calculation on a plurality of photoelectric outputs changes, the magnitude relationship between the levels does not change, so the same operation as described above can be performed. And the first to third photometric outputs are from the BV value.
It comes to represent TV value or AV value.

Furthermore, in this embodiment, the first to third photometric outputs are calculated and the calculation results are extracted, but the same effect can be achieved even if the calculation formulas of equations (1) to (3) are selected, for example. can be achieved. This is because it is sufficient to select any one of the first to third photometric outputs.

Furthermore, standardization is not limited to replacing the photoelectric output with two levels; for example, by setting two reference levels near the average value and binarizing each photoelectric output for each reference level. , the photoelectric output near the average value may be replaced with another level.

The configuration of each block will be explained below.

FIG. 4 shows an example of a photoelectric element, in which a plurality of photoelectric elements are lined up, and can be constructed from a photo diode array, CCD, or the like. However, it is not necessarily necessary to form a matrix. By combining the outputs of the photoelectric elements, the photoelectric output in the above-mentioned divided regions is obtained.

FIG. 5 shows an example of a light receiving optical system. 31 is the fourth
A plurality of photoelectric elements shown in the figure include a photographing lens 32, a mirror 33, a film surface 34, and a film surface 35.
36 is a finder screen, and 36 is a lens for re-imaging the subject image formed on the finder screen on the light receiving element surface.

With the above configuration, the brightness of each part of the scene to be photographed can be measured, and a plurality of independent photometric information can be extracted.

FIG. 6a shows a circuit example of the maximum value detection circuit 11, and FIG. 6b shows a circuit example of the minimum value detection circuit 13. These circuits use an OP amplifier and an ideal diode and are known per se.

FIG. 7 shows an average value detection circuit 12 configured with resistors γ, γ/n and an OP amplifier A ₁ , and the output of the OP amplifier is (P ₁ +P ₂ ...P _o-1 )/n=P _neao The following output is obtained.

FIG. 8 is a circuit example of the arithmetic circuits 14, 15, 16, and includes followers _A10 to _A12 and voltage dividing resistors _R1 to _R4.
The first to third photometric outputs PH,
By adjusting the partial pressure ratio, PM and PL can be adjusted to (1), (2),
It can be obtained to satisfy equation (3).

FIG. 9 is a circuit example of the binarization circuit 17 and the classification circuit 20. This figure shows an example in which the screen is divided into five parts as shown in Fig. 3b.

An input corresponding to the constant Pα is applied to the in-phase input terminal of the comparator C ₁ , and an input corresponding to the constant Pβ is applied to the inverting input terminal of the comparator C ₂ . On the other hand, an input corresponding to the constant α is applied to the in-phase input terminal of the comparator C ₃ , and an input corresponding to the constant β is applied to the inverting input terminal of the comparator C ₄ . Photoelectric output P ₀ ~
A reference input equivalent to P _neao −δL is applied to the inverting inputs of comparators C ₇ to _{C 11} that use P ₄ as an in-phase input. This level reduction equivalent to δL reduces the photoelectric output P ₀
This is to more reliably perform binarization on the low luminance side of ~ _P4 . The inverting input of the comparator C ₆ , which uses the photoelectric output P ₀ as the common-mode input, has P _neao + δH.
A significant reference input is applied. This level increase corresponding to δH is to ensure more reliable binarization on the high brightness side of the photoelectric output _P0 .

The maximum value P _nax is input to the inverting input terminal of comparator C ₁ and the in-phase input terminal of comparator C ₂ . The luminance difference ΔP is input to the inverting input terminal of the comparator _C3 and the in-phase input terminal of the comparator _C4 . The outputs of the comparators _C1 to _C4 are input to the AND gate _AND1 . When the output of the AND gate AND ₁ becomes 1, the outputs of the comparators C ₁ to _{C 4} all indicate 1, and Pα≦P _nax Pβ……(7)(a) and α≦ΔP≦β……
This is when (7)(b) holds true. Let the output of the AND gate AND ₁ be the M flag. OR gate when M flag is 1
The output of OR ₁ becomes 1, and the analog switch 22 is turned on to select the second photometric output PM. This is because formula (7) b holds true, indicating that there is a certain degree of brightness difference, but if formula (7) a holds true, then
That is, when the maximum value is within a certain range, there is no backlight condition and the appropriate exposure level exists near the average value. The photoelectric output P ₀ is input to the in-phase input terminals of comparators C ₆ and C ₇ , and the following photoelectric outputs P ₁ , P ₂ , P ₃ and P ₄ are input to the comparators C ₈ ,
Input to common mode input terminals of C ₉ , C ₁₀ , and C ₁₁ .
Further, an output P _neao +ΔH obtained by raising the average value by a certain value is input to the inverting input terminal of the comparator C ₆ . The output of the comparator C ₆ becomes 1 when the photoelectric output P ₀ of the central area Dc is higher than the average value P _neao by a discernible amount (by δH), indicating that the center of the photographic screen is a bright area. It shows. On the other hand, the inverting input terminals of the comparators C ₇ to _{C 11} receive an output P _neao −ΔL obtained by lowering the average value by a certain value. When the outputs of the comparators C ₇ to _{C 11} become 0, the photoelectric outputs P ₀ to _{P 4} are lower than the average value P neao by a discernible amount (by _δL ), and the photoelectric outputs P ₀ to _{P 4}
This indicates that the corresponding screen is in a dark area.

Note that, as is clear from the comparators C ₆ and C ₇ , P ₀ is normalized by performing binarization on two reference levels near the average value.

The AND gate AND ₂ has comparators C ₆ , C ₉ ,
The output of _C10 and the output inverted by the inverter _INV1 of the M flag are input. and gate AND ₂
The output of becomes 1 because P ₀ > P _neao + δH (central area Dc is the bright part) P ₂ ≧P _neao − δL …(8) P ₄ ≧P _neao − δL (lower half area Drl, Dll is not a dark area) holds true and the M flag is 0. In such a state, the central region Dc is bright and the upper half region is bright.
When Dru and Dlu are dark, it is like a spot light. Therefore, equation (8) becomes the condition for determining that the main subject is in the bright area. and gate
The output of AND ₂ is set as the H flag. Now, when the H flag is 1, that is, when the comparators C ₉ and C ₁₀ are outputting 1 and the inverter INV ₁ is outputting 1, the analog switch 21 is turned on and the first photometric output PH is extracted. .

The output of _C7 goes into inverter _INV3 . Now, if P ₀ <P _neao −δL (the central region Dc is a dark area) (9) holds, the output of the comparator C ₇ is 0 and the output of the inverter INV ₃ is 1. Also, the outputs of comparators _C8 and _C9 enter the NOR gate _NOR1 .

P ₁ < P _neao − δL (left half area Dlu, P ₂ <〃 Dll is the dark area)...If (10) holds, the outputs of comparators C ₈ and C ₉ are both 0 and the output of NOR gate NOR ₁ is 1. become. Similarly, P ₂ <P _neao −δL (lower half area Drl P ₄ < 〃 Dll is the dark part) ...(11) and P ₃ <P _neao −δL (right half area Dru P ₄ < 〃 Drl is the dark part) If …(12) holds, then Noah gate NOR ₂ ,
The output of NOR ₃ becomes 1. The outputs of inverter INV ₃ and NOR gates NOR ₁ to _{NOR 3} are OR gates.
If the input is input to OR ₃ and any output is 1, the output of OR gate OR ₃ will be 1. That is, (9) to (12)
This means that if any of the equations holds true, the output of the OR gate _OR3 will be 1. If formula (9) holds true, this means that the center of the screen, where there is a high probability that the main subject is located, is a dark area, and it is better to adjust the exposure to the low brightness side. However, even if the center of the screen is bright, it is often due to the brightness of the background, and it cannot necessarily be determined that the main subject is in the bright area. In fact, in backlit situations, the brightness of the main subject will be close to the brightness of the lower part of the screen. Therefore, if equation (11) holds true, it is better to determine that the main subject is in a dark area and select the third photometric output PL. (Ten),
If Equation (12) holds true, it is considered that the camera was held in a vertical position to take a picture. As described above, each of equations (9) to (12) becomes a condition for determining that the main subject is in a dark area. And at this time orgate OR ₃
The output of becomes 1. At this time, the AND gate AND ₁
If the M flag is 0, that is, if equations (7) (a) and (b) are not satisfied, the inverter INV ₁ outputs 1.
Therefore, the AND gate AND ₃ outputs 1, turns on the analog switch 23, and outputs the third photometric output.
Extract PL.

H and L flags are input to Noah gate NOR ₄ ,
If both are 0, it becomes 1. This is a case where it is not determined that the main subject is in a bright area or a dark area. At this time, the output of OR gate OR ₁ becomes 1, and the second photometric output PM is selected.

In the above embodiment, the element 10 serves as the photometric means, the means for outputting P _neao , P _neao -δL, P _neao +δH, etc. serves as the reference output generation means, the elements C 6 to C 11 serve as the detection means, and the elements C ₆ to C ₁₁ serve as the detection means. The remaining elements after removing elements C ₆ to _{C 11} from the figure and elements 11 to 16 and 21 to 24 in FIG. 2 constitute exposure information generating means, respectively. In addition, elements C ₆ to _{C 11} are the binarization circuit, elements 11 to 16 are the appropriate photometric output generation circuit, and elements C ₆ to _{C 11} are removed from Fig. 9 and elements 21 to 23 in Fig. 2 are extracted. Each constitutes a means.

As described above, the present invention independently measures the light of the central area set within the photographing screen and at least two peripheral areas around it, and compares each photoelectric output with the reference output. It is possible to accurately grasp the brightness distribution state within the screen. Furthermore, since the reference output of the present invention is set to have an output level between the maximum value and the minimum value according to a plurality of photoelectric outputs, the overall brightness level of each area within the photographic screen is high ( Even if the brightness is high or low, it is always possible to determine which areas have high brightness and which areas have low brightness. Furthermore, since the present invention generates appropriate exposure information according to the brightness distribution state based on the brightness distribution state within the photographic screen determined as described above, it is possible to You can also automatically obtain exposure information that will give you the correct exposure. Of course, it is possible to easily obtain proper exposure even under special field conditions such as backlighting or spotlight illumination.

[Brief explanation of the drawing]

Figure 1 is a diagram showing the brightness of each part of the field (screen) in three-dimensional figures, Figure 2 is a block diagram showing an embodiment of the present invention, and Figure 3 is an example of how the drawing is divided. Figure 4 is a diagram showing an example of a photoelectric element array, Figure 5 is a diagram showing an example of a light receiving optical system, Figure 6 is a diagram showing an example of a maximum value and minimum value detection circuit, and Figure 7 is a diagram showing an example of an average value detection circuit. FIG. 8 is a diagram showing an example of a value detection circuit, FIG. 8 is a diagram showing an example of an arithmetic operation circuit, and FIG. 9 is a diagram showing an example of a classification circuit. Explanation of symbols of main parts, 10...Photometric circuit, 11
~16...Appropriate photometric output generation circuit, 17...Standardization circuit (binarization circuit), 20-23...Classification/extraction circuit.

Claims (1)

[Scope of Claims] 1. A central region located approximately at the center of the photographic screen and at least two peripheral regions located around the central region are each independently photometered, and the brightness of the central region and each peripheral region is measured. a photometric means that generates a plurality of photoelectric outputs corresponding to respective values, and a reference output that takes the plurality of photoelectric outputs as input and whose output level is set between the maximum value and the minimum value of the plurality of photoelectric outputs. a reference output generating means; a detecting means for comparing each of the plurality of photoelectric outputs with the reference output and detecting a brightness distribution state in the central and peripheral areas; 1. A multi-photometering device comprising: exposure information generating means for generating appropriate exposure information according to a brightness distribution state. 2. The multi-photometering device according to claim 1, wherein the reference output generating means outputs an average value of the plurality of photoelectric outputs as the reference output. 3. In the multi-photometering device according to claim 2, the detection means compares the reference output with the plurality of photoelectric outputs and generates a binary output representing a brightness/dark state of each region. the exposure information generating means has a first photometric output having an output level between the maximum output of the photoelectric output and the reference output, and a second photometric output having an output level approximately corresponding to the reference output. an appropriate photometric output generation circuit that generates a photometric output and a third photometric output having an output level between the reference output and the minimum output of the photoelectric output; and photography determined from the binary output of the binarization circuit. A multi-photometering device comprising: an extracting means for selectively extracting the first to third photometering outputs based on a luminance distribution state within a screen. 4. In the multi-photometering device according to claim 3, the photometering means has an upper right region located to the upper right of the central region and an upper left region located to the upper left of the central region as peripheral regions. , has a lower left region located at the lower left of the central region, and a lower right region located at the lower right of the central region, and the extracting means (a) extracts the lower left region located at the lower left of the central region; (b) select the third photometric output when the center area is a dark area or the left and right lower areas are dark areas, and (c) select the second photometric output when other than the above. A multi-photometering device characterized by being able to select photometering outputs. 5. In the multi-photometry device according to claim 4, the extraction means selects the third photometry output when the upper and lower left areas are dark areas, or when the upper and lower right areas are dark areas. Features a multi-photometering device. 6. In the multi-photometering device according to claim 3, the photometering means has an upper region located above the central region as a peripheral region, and a lower region located below the central region, The extraction means (a) selects the first photometric output when the central area is a bright area, and (b) selects the third photometric output when the central area is a dark area or when the lower area is a dark area. A multi-photometering device characterized in that it selects a photometering output, and (c) selects a second photometering output at times other than the above. 7. The multi-photometering device according to claim 2, wherein the average value is one of an average value, a median value, and a mode value of the plurality of photoelectric outputs. Device.