JP3398036B2 - Digital camera - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a digital camera, and in particular, for example, the amount of strobe light emission is calculated by dividing photometry by dividing a screen into a plurality of areas for photometry.
Regarding a digital camera.

[0002]

2. Description of the Related Art An example of a conventional digital camera of this kind is disclosed in Japanese Patent Application Laid-Open No. 10-1998, filed on February 3, 1998.
-31250 gazette [G03B15 / 05]. In this conventional technique, two weighting amount tables are provided in order to calculate the light emission amount of the strobe by divided photometry, and the weighting amount tables are switched according to the mode. Therefore, in the forced light emission mode in which the strobe is forced to emit light for backlight compensation, one of the weighting amount tables is always used to calculate the strobe light emission amount.

[0003]

However, in such a conventional technique, backlight correction may not be appropriately applied depending on the size and position of the main subject. That is, in the division photometry, different weighting amounts are assigned to the respective divided areas, and further a large weighting amount is assigned to the center of the screen where the main subject is supposed to be located. Therefore, as shown in FIGS. 14A and 14B, when the main subject is located at the center of the screen, the luminance of the main subject is emphasized, and the backlight compensation can be appropriately applied. However, if the main subject is off the center of the screen as shown in FIG. 15A or if the size of the main subject is small even if the main subject is located at the center of the screen as shown in FIG. Brightness is important. As described above, in the conventional digital camera, the backlight cannot be properly corrected depending on the size and position of the main subject.

Therefore, a main object of the present invention is to provide a digital camera capable of appropriately performing backlight compensation regardless of the position and size of a main subject.

[0005]

SUMMARY OF THE INVENTION According to the present invention, in a digital camera for calculating a flash light emission amount by divided photometry, a first weighting amount table that assigns a first weighting amount to each divided area, and a first weighted amount table to each divided area. A second weighting amount table for allocating two weighting amounts, a forced light emission mode setting means for setting a forced light emission mode for forcibly emitting light from the strobe, and a first strobe light based on the brightness of the subject and the first weighting amount in the forced light emission mode. Any of the first calculation unit for calculating the light emission amount, the second calculation unit for calculating the second light emission amount of the strobe in the forced light emission mode based on the brightness and the second weighting amount, and the first light emission amount and the second light emission amount It is a digital camera characterized by comprising a selecting means for selecting one of them.

[0006]

The image data of the subject photographed in response to the operation of the shutter button is temporarily held in the RAM. Luminance data of the subject is calculated from this image data. In the forced light emission mode, the brightness data is first weighted by the first weighting amount, and the first light emission amount is calculated by this. Next, the same luminance data is weighted by the second weighting amount, and the second light emission amount is calculated by this. The microcomputer compares the first weighting amount with the second weighting amount and selects either one. The strobe emits light with the selected light emission amount. In the automatic light emission mode, the luminance data of the subject is weighted by the first weighting amount, and the third light emission amount is calculated by this. In the forced light emission mode, the first light emission amount calculated first is the third light emission amount.
It matches the value obtained by multiplying the light emission amount by a predetermined value. That is, when obtaining the first light emission amount, first, the third light emission amount is calculated, and the third light emission amount is multiplied by a predetermined value to calculate the first light emission amount.

The difference between the maximum value and the minimum value of the second weighting amount is larger than the difference between the maximum value and the minimum value of the first weighting amount. That is, when the second weighting amount table is used,
The brightness at the center of the screen is more important than when the first weighting amount table is used. When the main subject is located in the center of the shooting area, the flash fires at the second light emission amount. On the other hand, when the subject is small or deviated from the center, underexposure occurs at the second light emission amount that emphasizes the central brightness, that is, the background brightness, so the first light emission amount calculated using the first weighting amount table. The flash fires at.
However, the exposure amount is not yet sufficient with the third light emission amount calculated in the automatic light emission mode. Therefore, the first light emission amount is calculated by multiplying the third light emission amount by a predetermined value.

[0008]

According to the present invention, the first light emission amount and the second light emission amount are calculated in the forced light emission mode, and the strobe light is emitted by one of them, so that it is appropriate regardless of the size or position of the main subject. Backlight compensation can be applied to. The above objects of the present invention, other objects,
Features and advantages will become more apparent from the following detailed description of the embodiments with reference to the drawings.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT Referring to FIG. 1, a digital camera 10 of this embodiment includes a CCD imager 20. This CCD
The imager 20 receives a subject image incident through the lens 12 and outputs a camera signal corresponding to this subject image. A plurality of light receiving portions 20a are formed on the front surface of the CCD imager 12 as shown in FIG. 2, and further, as shown in FIG. 3, Ye, Cy, Mg are formed on the surface of the light receiving portions 20a.
A complementary color filter 20d in which four filter elements G and G are arranged on the mosaic is mounted. Each light receiving portion 20a constitutes each pixel of the CCD imager 20, and Ye, Cy,
Either Mg or G is arranged corresponding to each light receiving portion 20a. The subject image that has passed through the lens 12 passes through the complementary color filter 20d and enters the light receiving unit 20a,
It is photoelectrically converted. The charges thus obtained are accumulated during the exposure period corresponding to the shutter speed, that is, the charge accumulation period, and then output to the outside.

More specifically, as shown in FIG. 2, the CCD imager 20 vertically transfers a plurality of light receiving portions 20a corresponding to each pixel and the charges photoelectrically converted and accumulated in each light receiving portion 20a. The timing output from the timing grenator 22 includes a plurality of vertical transfer registers 20b for controlling the vertical transfer register 20b, and a horizontal transfer register 20c arranged at the end of the vertical transfer register 20b for horizontally transferring the charges transferred by the vertical transfer register 20b. Driven by a signal. Here, as the timing signal, a read pulse for reading charges from the light receiving unit 20a to the vertical transfer register 20b, a vertical transfer pulse for vertically transferring the charges of the vertical transfer register 20b line by line, and a charge of the horizontal transfer register 20c for one pixel. There is a horizontal transfer pulse for horizontally transferring each of them, and a sweep-out pulse for sweeping out the charges generated in the light receiving unit 20a in the non-exposure period, that is, the non-charge accumulation period to the overflow train (not shown).

The timing grenator 22 controls the output period of the sweep-out pulse according to the shutter speed instruction signal output from the microcomputer 40. As a result, the charge storage period is controlled and a desired shutter speed is obtained. The technique of controlling the shutter speed according to the output period of the sweep-out pulse is well known as an electronic shutter.

The charges generated by the CCD imager 20 for each pixel in this manner are sequentially output as an image signal. Since the complementary color filter 20d is formed as shown in FIG. 3, when the charge accumulation in the CCD imager 20 is completed, the Ye signal that has passed through the Ye filter element at the lower left corner is first output, and next to the right adjacent. The Cy signal that has passed through the Cy filter element is output. When the output from the lowest line is completed in this way, from the second line from the bottom,
Color signals are sequentially output in the same manner.

The image signal output from the CCD imager 20, that is, the color signal corresponding to each filter element is A
Digital signal (image data) by the / D converter 24
Is converted to. The image data output from the A / D converter 24 is sequentially written in the RAM 16 at the subsequent stage. RAM
Writing to 16 is controlled by a write control signal from the memory control circuit 28. In the RAM 26, an address is given in advance corresponding to each pixel of the CCD imager 20. The memory control circuit 28 executes writing based on the timing signal from the timing grenator 22 so that each color data included in the image data is recorded at a desired address. Which pixel of the CCD imager 20 the input color data corresponds to is reset by the read pulse, reset by the count value of the vertical counter incremented by the vertical transfer pulse, and reset by the vertical transfer pulse. It can be determined by the count value of the horizontal counter incremented by.

In this way, every time the CCD imager 20 is exposed once, the charges of all the pixels are taken out, and the image data having each color component of Ye, Cy, Mg and G is stored in the RAM 16 in each pixel. Remembered. As shown in FIG. 4, in the complementary color filter 20d, four pixels each including one filter element of Ye, Cy, Mg and G are set as one block, and _B1,1 , _B1,2 ... A plurality of blocks B _{m, n} (m, n; integer) are formed. When the writing of all color data to the RAM 16 is completed, the color control data having the Ye, Cy, Mg and G components is read for each block by the read control signal from the memory control circuit 28.

The color data of Ye, Cy, Mg and G read from the RAM 26 and contained in the same block is subjected to a predetermined calculation by the calculation circuit 30, whereby the luminance data Y and the color difference data RY and B
-Y is created. Of these, the luminance data Y is input to the weighting circuit 32. The weighting circuit 32 stores the first weighting amount stored in the first weighting amount table 34 or the second weighting amount stored in the second weighting amount table 35.
The luminance data Y is weighted based on the weighting amount. That is, the weighting circuit 22 multiplies the brightness data Y by any weighting amount.

The first weighting amount table 34 and the second weighting amount table 35 receive the read address data from the memory control circuit 28, and the luminance data Y and the color difference data RY and B- obtained by the arithmetic circuit 30. Recognize from which block Y was created. And
The first weighting amount table 34 and the second weighting amount table 35 output corresponding weighting amounts.

More specifically, as shown in FIG. 5A, the first weighting amount table 34 includes 64 areas A _{i, j} (i, j; 1 to 8) in the vertical direction 8 and the horizontal direction 8. Integer)
The first weighting amount having a value of 0 to 3 is assigned to each area. Each area A _{i, j} is the block B _m, greater than _n, 1 single area A _i, a plurality of blocks B _m, the first to _n the same contained in the _j
A weighting amount is assigned. The first weighting amount table 34 detects an area corresponding to the luminance data Y output from the arithmetic circuit 30, and gives the weighting circuit 32 the first weighting amount assigned to the area. Similarly, in the second weighting amount table 35, as shown in FIG. 5B, 64 areas A _{i, j} (i, _j
j; an integer from 1 to 8) and 0 in each area
The second weighting amount having any one of the values 3 to 3 is set. This second weighting amount table is also the arithmetic circuit 3
The area corresponding to the data output from 0 is detected, and the second weighting amount assigned to the area is given to the weighting circuit 32.

Referring to FIG. 5 (A), the first weighting amount has a value of "3" in the central four areas where the main subject is most likely to exist, and the first weighting amounts are located in the periphery of these four areas. However, it has a value of "2" in 12 areas where the possibility of the main subject being present is somewhat low. On the other hand, the three areas provided at each of the four corners have a value of "0", and the remaining 40 areas have a value of "1". By weighting the luminance data Y with such a first weighting amount, it is possible to perform center-weighted split photometry in which the luminance level at the center of the screen is given the highest priority and the luminance levels of the peripheral areas are sufficiently taken into consideration. On the other hand, referring to FIG. 5B, the second weighting amount is “2”, “5” and “6” only in the central 16 areas.
And the remaining 48 areas are all "0". Focusing on the central 16 areas, “6” is assigned to the further four central areas, “2” is assigned to each one of the four corners, and “5” is assigned to the remaining eight areas.
Is assigned.

As described above, since the difference between the maximum value and the minimum value of the second weighting amount is larger than the difference between the maximum value and the minimum value of the first weighting amount, when the second weighting amount table 35 is used. , The brightness of the central part is further emphasized. The second weighting amount table 35 is used only for backlight compensation, and since it is highly possible that a high-luminance light source such as a fluorescent lamp or the sun exists in the surrounding 48 areas, “0” is assigned. There is. That is, in the divided photometry using the second weighting amount table 35, the brightness level of the area to which “0” is assigned is substantially excluded when calculating the brightness evaluation value described later.

The switch SW2 is controlled by the microcomputer 40 so that only one of the first weighting amount and the second weighting amount is input to the weighting circuit 32. The brightness data output from the weighting circuit 22 is stored in the integrator 3
Integrated by 6. The calculator 38 divides the integrated value output from the integrator 36 by the sum of the weighting amounts assigned to the respective blocks, and thereby calculates the brightness evaluation value V _y that is the evaluation target of the exposure adjustment.

The color difference data RY and BY output from the arithmetic circuit 30 are supplied to a white balance adjusting circuit (not shown). The microcomputer 40 determines the exposure period of the CCD imager 20, that is, the shutter speed, based on the brightness evaluation value V _y input from the calculator 38. The microcomputer 40 also instructs the exposure timing of the CCD imager 20, that is, the shooting timing, based on the determined shutter speed. The microcomputer 40 is further
The light emission of the strobe 18 and the switches SW1 and SW2 are controlled on the basis of the photographing command from the release button (shutter button) 48 and the brightness evaluation value V _y .

The strobe 18 emits light for a predetermined time in response to a strobe control signal from the microcomputer 40. The light emission time of the strobe 18 defines the light emission amount, and the longer the light emission time, the larger the light emission amount. The release button 48 inputs a photographing command to the microcomputer 40 in response to the pressing by the operator. The signal processing circuit 42 receives the image data stored in the RAM 16 after the shooting command is input through the switch SW1, performs well-known signal processing such as color separation, gamma correction, and signal compression, and outputs compressed data. . This compressed data is recorded by the microcomputer 40 in the recording medium 43 such as a flash memory or a memory card.

When the operator operates the mode setting button 46, either the automatic light emission mode or the forced light emission mode is set. That is, when the mode setting button 46 is switched to the automatic light emission side, the microcomputer 40 connects the switch SW2 to the first weighting amount table 34 side. On the other hand, when the mode setting button 46 is switched to the forced light emission side, the microcomputer 40 first connects the switch SW2 to the first weighting amount table 34 side and then to the second weighting amount table 35 side.

Here, the automatic light emission mode means a mode in which the strobe 18 emits light to compensate for the insufficient amount only when it is determined by the exposure adjustment operation that the exposure speed is not reduced even if the shutter speed is set to the minimum speed. However, it is preferable to select this automatic light emission mode in a normal photographing state. On the other hand, the forced flash mode is a backlight compensation mode in which the strobe is forcibly fired to optimize the exposure of the main subject when the main subject is in an abnormally high-brightness backlight state. means.

The microcomputer 40 processes the flow charts shown in FIGS. 6 to 10 in the forced light emission mode, and processes the flow charts shown in FIGS. 11 and 12 in the automatic light emission mode. In the forced light emission mode, the microcomputer 40 first selects the first weighting amount table in step S1. When the shutter button 48 is pressed, the microcomputer 40 determines “YES” in step S3, and initializes the shutter speed in step S5. That is, the shutter speed setting signal is given to the timing grenator 22 so that the shutter speed is set to the intermediate speed of 1/250 seconds. As a result, the timing grenator 22 adjusts the output period of the sweep-out pulse so that the charge storage period becomes 1/250 seconds. Next, the microcomputer 40 performs exposure at a shutter speed of 1/250 second in step S7. The image data generated by this exposure is the RAM 2
6 and then the arithmetic circuit 30 calculates the luminance data Y and the color difference data RY and BY based on this image data. Only the luminance data Y is weighted by the first weighting amount, and finally the luminance evaluation value _Vy1 in which the first weighting amount is reflected is calculated.

The microcomputer 40 fetches the brightness evaluation value V _y1 in step S9, and then calculates the optimum shutter speed based on the brightness evaluation value V _y1 and the target brightness evaluation value Y _{t in} step S11. Specifically multiplying Y _t / V _y to the current shutter speed. For example, the input brightness evaluation value V _y1 is “50” and the target brightness evaluation value Y _t is “100”.
In that case, since the brightness is only half of the optimum state, the optimum shutter speed is 1/125 seconds.

Subsequently, the microcomputer 40 determines in step S13 whether or not the optimum shutter speed is lower than 1/30 seconds. If "YES", the shutter speed is fixed to 1/30 seconds in step S15. This step S1
In the processing of 3 and S15, the minimum shutter speed value in the digital camera 10 of this embodiment is 1/30.
This is set in consideration of the fact that it cannot be set to a speed lower than this minimum speed value in actuality. Note that step S1
If “NO” in 3, the process proceeds directly to step S17. In this way, the shutter speed at the time of main exposure is obtained, but since the shutter speed is changed at the time of pre-light emission that is subsequently executed, the microcomputer 40 causes the microcomputer 40 to execute step S17.
Then, the shutter speed for the main exposure is saved in the memory 40a.

The microcomputer 40 also calculates the non-luminous brightness evaluation value Y ₀₁ in accordance with equation 1 in step S19.

[0029]

## EQU1 ## Non-emission luminance evaluation value Y ₀₁ = {(1/30) / (1
/ 250) × luminance evaluation value V _y1 )} That is, the shutter speed at the time of main light emission is 1/30 seconds, and the luminance evaluation value V _y1 input in step S9 is calculated when the shutter speed is 1/250 seconds. It was done. Therefore, from these three numerical values, the brightness evaluation value obtained when exposure is performed for 1/30 second without the strobe 18 emitting light is defined as the non-emission brightness evaluation value Y ₀₁ .
When the brightness of the subject is considerably small, the target brightness evaluation value Y _t and the non-emission brightness evaluation value Y ₀₁ have a relationship as shown in FIG. 13, for example.

Next, the microcomputer 40 executes a visual check in step S21.
Standard brightness evaluation value Y_tAnd non-luminous brightness evaluation value Y₀₁Compare with
It Here, the non-luminous brightness evaluation value Y₀₁Is the target brightness evaluation value Y
_tIf it is larger than
Absent. However, the operator selects the forced flash mode
Therefore, the microcomputer 40 determines the main light emission amount Q in step S23.
₃Set (third light emission amount) to the minimum value, and go to step S37.
move on. On the other hand, the target brightness evaluation value Y_tIs the non-luminous brightness evaluation value Y
₀₁If the shutter speed is greater than
Even if it is set to 30 seconds, underexposure will occur.
0 is step S27, and the shortage shown in FIG.
Amount U₁Ask for.

[0031]

[Expression 2] U ₁ = Y _t −Y _{01 The} microcomputer 40 then sets the shutter speed to 1/1500 seconds in step S29, and performs exposure at this shutter speed and pre-emission at the light emission amount P ₁ in step S31. Run. Then, in step S33, the brightness evaluation value V _y1 based on this pre-emission is taken in and treated as the pre-emission brightness evaluation value Y _S1 . Shutter speed is 1/150
When it is remarkably short as 0 second, the image data is hardly affected by the external light component. Therefore, the pre-emission luminance evaluation value Y _S1
Can be approximated to depend only on the pre-flash of the strobe 18. In step S35, the main light emission amount Q ₃ is calculated according to the equation ₃ .

[0032]

[Equation 3] Q ₃ = (U ₁ / Y _S1 ) × P _{1 In the} equation 3, the insufficient amount of luminance is set to U ₁ as the pre-emission luminance evaluation value Y.
_By dividing by _S1 , how many times the luminance evaluation value obtained by one pre-emission is necessary to make up for the shortage amount is obtained, and this amount of light emission P ₁ at the time of pre-emission is calculated. Finally, the main light emission amount Q ₃ is obtained by multiplying by.

In this way, step S23 or S3
5 main emission Q₃Is required, the microcomputer 40
In step S37, this main light emission amount Q₃Is multiplied by a predetermined value α
And the actual light emission Q₁(First emission amount) is calculated. First weighting
The exposure amount table 34 is the optimum exposure in the automatic light emission mode.
It is provided for the purpose of
Main emission when positioned as shown in (A) or (B)
Quantity Q₃If you keep using
Occurs. That is, in FIGS. 15A and 15B, the shooting
There is a background in the center of the area, and the background has high brightness.
Is. In other words, weighted by shooting in backlight
The weighting data output from the scaling circuit 32 is the forward light state.
Weights output from the weighting circuit 32 by shooting at
It is larger than the attached data. Therefore, step S35
Main emission amount Q calculated in₃Is less than the optimum main flash output.
Absent. For this reason, the microcomputer 40 starts
Light intensity Q ₃Is multiplied by a predetermined value α, and the main light emission amount Q₁Seeking
It The predetermined value α is, for example, “1.2”.

Using the first weighting amount table 34,
Light intensity Q₁Is calculated, the microcomputer 40 determines the second weighting.
Perform almost the same processing as described above using the weight table 35.
However, the actual light emission Q₂(Second emission amount) is calculated. However,
The second weighting amount table 35 is shown in FIG.
A main subject exists as shown in (A) or (B)
In order to be able to apply backlight compensation properly,
2 weighting amount is set. Therefore, the main light emission amount Q
₂In calculating, as shown in step S37
No processing is necessary. In addition, steps S3 to S7
Image data is stored in RAM 26 by the shooting process in
Therefore, it is not necessary to operate the shutter again.
As a result of omitting such unnecessary processing, steps S41 to
The process of S65 is similar to that of steps S9 to S35.
Therefore, duplicate description will be omitted. For convenience of explanation,
In the processing using the 2 weighting amount table 35, the luminance evaluation
Value is V _y2And the non-luminous luminance evaluation value is Y₀₂And the shortage
U₂And the pre-emission luminance evaluation value is Y_S2And then the book
Q of light emission₂And

The microcomputer 40 compares the main light emission amounts Q ₁ and Q _{2 in} step S67. Then, the light emission amount Q ₁ is selected the main light emission amount Q ₁ if in step S71 is greater, the greater the main light emission amount Q _2, the light emission amount Q ₂ in step S69
Select. Then, in step S73, the shutter speed corresponding to the selected main light emission amount is set to the memory area 40.
After returning from a, in step S75, photographing is performed at a desired shutter speed and main light emission amount. Then, in step S77, the captured image data is recorded in the recording medium 44, and the process ends.

[0036] Thus, in the forced light emission mode, the light emission amount Q ₁ is determined using the first weighting amount table 34, the light emission amount Q ₂ using the second weighting amount table 35
Is required. Then, the main light emission amount having a large value is selected. Therefore, when the main subject is located at the center as shown in FIG. 14 (A) or (B), the strobe 18 emits light with the main light emission amount Q ₂ , and as shown in FIG. If it is off the center or the main subject is small as shown in FIG.
Lights up at ₁ . Therefore, the backlight compensation can be appropriately applied regardless of the position and size of the main subject.

In the automatic light emission mode, the microcomputer 40 operates as shown in FIG.
1 and the flow chart shown in FIG. 12 are processed, but since this processing is substantially the same as the first half processing in the forced light emission mode, the same step numbers are used for the same processing and duplicate description is omitted. In the automatic light emission mode, it is not necessary to cause the strobe 18 to emit light unless underexposure occurs. Therefore, if the optimum shutter speed calculated in step S11 is faster than 1/30 second, exposure is executed without making the strobe 18 emit light in step S79, and the process proceeds to step S77. In the automatic light emission mode, the shutter speed during main light emission is fixed at 1/30 second. For this reason, the shutter speed saving process as in step S17 shown in FIG. 6 and step S73 in FIG.
Such a shutter speed restoration process is unnecessary. Instead, following step S35, step S81 for setting the shutter speed to 1/30 second is provided. Further, since the first weighting amount is set in the first weighting amount table 34 so as to appropriately eliminate the underexposure in the automatic light emission mode, a predetermined value α is set for the main light emission amount Q ₃ as shown in step S37. The process of multiplying is also unnecessary.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of the present invention.

FIG. 2 is an illustrative view showing a CCD imager.

FIG. 3 is an illustrative view showing a color filter.

FIG. 4 is an illustrative view showing a block formed in a color filter.

FIG. 5A is an illustrative view showing a first weighting amount table, and FIG. 5B is an illustrative view showing a second weighting amount table.

FIG. 6 is a flowchart showing a part of the operation in the forced light emission mode.

FIG. 7 is a flowchart showing another part of the operation in the forced light emission mode.

FIG. 8 is a flowchart showing another portion of the operation in the forced light emission mode.

FIG. 9 is a flowchart showing yet another portion of the operation in the forced light emission mode.

FIG. 10 is a flowchart showing another portion of the operation in the forced light emission mode.

FIG. 11 is a flowchart showing a part of the operation in the automatic light emission mode.

FIG. 12 is a flowchart showing another portion of the operation in the automatic light emission mode.

FIG. 13 is an illustrative view showing a relationship among a brightness evaluation value, a non-emission brightness evaluation value, a pre-emission brightness evaluation value, a pre-emission brightness evaluation value, and an insufficient amount.

FIG. 14 is an illustrative view showing an imaging area and a main subject located therein.

FIG. 15 is an illustrative view showing an imaging area and a main subject located therein.

[Explanation of symbols]

10 ... Digital camera 18 ... Strobe 20 ... CCD imager 30 ... Operation circuit 32 ... Weighting circuit 34 ... First weight amount table 35 ... Second weighting amount table 40 ... Microcomputer

Claims (5)

(57) [Claims] 1. A digital camera for calculating a flash emission amount by divided photometry, comprising: a first weighting amount table for assigning a first weighting amount to each of the divided areas; and a second weighting amount for assigning a second weighting amount to each of the divided areas. A weighting amount table, a forced light emission mode setting means for setting a forced light emission mode for forcibly emitting the light from the strobe, and a first light emission amount of the strobe based on the brightness of the subject and the first weighting amount in the forced light emission mode. First calculating means for calculating, second calculating means for calculating a second light emission amount of the strobe in the forced light emission mode based on the luminance and the second weighting amount, and the first light emission amount and the second light emission A digital camera, characterized by comprising selection means for selecting either one of the quantities. 2. An automatic light emission mode setting means for setting an automatic light emission mode for automatically emitting light from the strobe, and a third light emission amount of the strobe based on the brightness and the first weighting amount in the automatic light emission mode. The digital camera according to claim 1, further comprising third calculating means for calculating. 3. The first calculation means calculates a third light emission amount, and a third light emission amount calculation means calculates the first light emission amount by multiplying the third light emission amount by a predetermined value. The digital camera according to claim 2, further comprising an amount calculation means. 4. The non-luminous luminance evaluation value calculating means for calculating non-luminous luminance evaluation value based on the luminance when the strobe is non-luminous and the first weighting amount, and strobe pre-luminous. Pre-emission brightness evaluation value calculation means for calculating a pre-emission brightness evaluation value based on the brightness and the first weighting amount at the time, and the non-emission brightness evaluation value, the pre-emission brightness evaluation value, the pre-emission amount, and the target 4. The digital camera according to claim 3, further comprising a calculation unit that calculates the third light emission amount based on a brightness evaluation value. 5. The method according to claim 1, wherein the difference between the maximum value and the minimum value of the second weighting amount is larger than the difference between the maximum value and the minimum value of the first weighting amount. Digital camera.