JP6471843B2 - Imaging apparatus, control method, and program - Google Patents

Description

  The present invention relates to an imaging apparatus, a control method, and a program.

  2. Description of the Related Art Conventionally, there has been known an imaging device that performs bracket shooting (universal shooting mode) for shooting a plurality of images in which shooting parameters such as exposure and white balance are changed in several stages by one shooting.

  As a technique similar to the bracket photographing, for example, a technique for performing white balance correction based on the ratio of artificial light and natural light has been proposed (for example, Patent Document 1).

  As another technique, white balance adjustment data is obtained based on luminance data (Y) and hue data (R, G, B), and further, white balance adjustment data is corrected based on the green scene characteristics of the subject. The technique which performs is proposed (for example, patent document 2).

In addition, to get the histogram for each color for the entire image, the image is green, red, blue, etc., you are charged with any color, any color that is determined is concentrated anywhere in the area on the screen, the A technique for discriminating and specifying a scene using information obtained by the discrimination is proposed (for example, Patent Document 3).

JP 2002-374539 A JP 2004-274367 A JP2011-82691A

  However, in any of the above prior art techniques, the shooting parameters at the time of bracket shooting can be set, but the set shooting is possible even if the shooting conditions such as the light source, shooting scene, and image brightness change. There is a problem that only a monotonous image can be obtained because it can only be photographed with parameters.

  Accordingly, an object of the present invention is to make it possible to adjust shooting parameters during bracket shooting according to shooting conditions.

In order to achieve the above object, one aspect of an imaging apparatus according to the present invention is:
Imaging means;
Determination means for determining a shooting situation by the imaging means;
Control means for acquiring a plurality of images taken by the imaging means while changing a shooting parameter based on the shooting situation determined by the determination means;
With
The determination means determines the type of light source at the time of shooting as the shooting situation,
The control means changes the color shift direction of white balance at the time of photographing to a cyan direction and a red direction as the photographing parameter when it is determined that the light source type is sunlight, or the light source type Is determined to be a fluorescent lamp, the color shift direction of white balance at the time of shooting is changed to the cyan direction and the yellow direction as the shooting parameter, or the light source type is not sunlight and is a fluorescent lamp. If it is determined that there is not, the color shift direction of white balance at the time of shooting is changed to the blue direction and the yellow direction as the shooting parameter.
It is characterized by that.
In order to achieve the above object, one aspect of the imaging apparatus according to the present invention is:
Imaging means;
Determination means for determining a shooting situation by the imaging means;
Control means for acquiring a plurality of images taken by the imaging means while changing a shooting parameter based on the shooting situation determined by the determination means;
With
The determination means determines whether the brightness at the time of shooting is larger than a predetermined threshold as the shooting situation,
When it is determined that the brightness is greater than the predetermined threshold, the control unit increases a color shift amount of white balance at the time of shooting as the shooting parameter, and the brightness is higher than the predetermined threshold. If it is determined that the threshold value is small or equal to the predetermined threshold value, the color shift amount of white balance at the time of shooting is reduced.
It is characterized by that .

In order to achieve the above object, one aspect of the control method according to the present invention is as follows:
An image pickup apparatus control method comprising an image pickup means,
A determination step of determining a shooting situation by the imaging means;
A control step of acquiring a plurality of images taken by the imaging means while changing a shooting parameter based on the shooting situation determined in the determination step;
Including
In the determination step, as the shooting situation, the type of light source at the time of shooting is determined,
In the control step, when it is determined that the type of the light source is sunlight, the color shift direction of white balance at the time of shooting is changed to the cyan direction and the red direction as the shooting parameter, or the light source of the light source When it is determined that the type is a fluorescent lamp, the color shift direction of white balance at the time of shooting is changed to the cyan direction and the yellow direction as the shooting parameter, or the type of the light source is not sunlight and the fluorescent lamp However, when it is determined that the white balance color shift direction at the time of shooting is changed to the blue direction and the yellow direction as the shooting parameter,
It is characterized by that.
In order to achieve the above object, one aspect of the control method according to the present invention is as follows:
An image pickup apparatus control method comprising an image pickup means,
A determination step of determining a shooting situation by the imaging means;
A control step of acquiring a plurality of images taken by the imaging means while changing a shooting parameter based on the shooting situation determined in the determination step;
Including
In the determination step, it is determined whether the brightness at the time of shooting is larger than a predetermined threshold as the shooting state,
In the control step, when it is determined that the brightness is larger than the predetermined threshold, the amount of white balance color shift at the time of shooting is increased as the shooting parameter, and the brightness is higher than the predetermined threshold. Is smaller or equal to the predetermined threshold value, the color shift amount of white balance at the time of shooting is reduced.
It is characterized by that .

In order to achieve the above object, one aspect of the program according to the present invention is as follows:
In a computer that controls an imaging apparatus including an imaging means,
A determination function for determining a shooting situation by the imaging means;
A control function for acquiring a plurality of images taken by the imaging means while changing a shooting parameter based on the determined shooting situation;
Realized,
The determination function determines the type of light source at the time of shooting as the shooting situation,
In the control function, when it is determined that the type of the light source is sunlight, the color shift direction of white balance at the time of shooting is changed to the cyan direction and the red direction as the shooting parameter, or the type of the light source Is determined to be a fluorescent lamp, the color shift direction of white balance at the time of shooting is changed to the cyan direction and the yellow direction as the shooting parameter, or the light source type is not sunlight and is a fluorescent lamp. If it is determined that there is not, the color shift direction of white balance at the time of shooting is changed to the blue direction and the yellow direction as the shooting parameter.
It is characterized by that.
In order to achieve the above object, one aspect of the program according to the present invention is as follows:
In a computer that controls an imaging apparatus including an imaging means,
A determination function for determining a shooting situation by the imaging means;
A control function for acquiring a plurality of images taken by the imaging means while changing a shooting parameter based on the determined shooting situation;
Realized,
In the determination function, as the shooting state, it is determined whether or not the brightness at the time of shooting is larger than a predetermined threshold,
In the control function, when it is determined that the brightness is larger than the predetermined threshold, the color shift amount of white balance at the time of shooting is increased as the shooting parameter, and the brightness is higher than the predetermined threshold. If it is determined that the threshold value is small or equal to the predetermined threshold value, the color shift amount of white balance at the time of shooting is reduced.
It is characterized by that .

  According to the present invention, it is possible to obtain an advantage that shooting parameters at the time of bracket shooting can be adjusted according to shooting conditions.

It is a block diagram which shows the structure of the imaging device by embodiment of this invention. It is a flowchart for demonstrating the bracket imaging | photography operation | movement of the imaging device by this embodiment. It is a flowchart for demonstrating the bracket imaging | photography operation | movement of the imaging device by this embodiment. It is a flowchart for demonstrating the bracket imaging | photography operation | movement of the imaging device by this embodiment. It is a flowchart for demonstrating the bracket imaging | photography operation | movement of the imaging device by this embodiment. It is a flowchart for demonstrating the bracket imaging | photography operation | movement of the imaging device by this embodiment. It is a flowchart for demonstrating the bracket imaging | photography operation | movement of the imaging device by this embodiment. It is a schematic diagram which shows an example of the thumbnail displayed after bracket imaging | photography of the imaging device by this embodiment. It is a schematic diagram which shows an example of the thumbnail displayed after bracket imaging | photography (biaxial) of the imaging device by this embodiment. In this embodiment, it is a conceptual diagram which shows the example of a change of the imaging | photography parameter using a YUV color coordinate system.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

A. Configuration of Embodiment FIG. 1 is a block diagram illustrating a configuration of an imaging apparatus 10 according to an embodiment of the present invention. In FIG. 1 , the imaging device 10 includes, for example, a digital camera, and includes an imaging lens 11, a diaphragm / shutter 12, a CCD 13, a TG (Timing Generator) 14, a unit circuit 15, an image processing unit 16, a lens driving unit 17, a CPU 18, A DRAM 19, a memory 20, a flash memory 21, a display unit 22, a key input unit 23, a card I / F 24, and a memory card 25 are provided.

  The imaging lens 11 includes a zoom lens and a focus lens, and a lens driving unit 17 is connected thereto. The lens driving unit 17 drives the imaging lens 11 in accordance with a control signal from the CPU 18, and performs autofocus driving, zoom driving, and the like. The diaphragm / shutter 12 includes a drive circuit (not shown), and operates according to a control signal sent from the CPU 18 by the drive circuit. The diaphragm / shutter 12 controls the amount of light entering from the imaging lens 11. The CCD (imaging device) 13 converts the light of the subject projected through the imaging lens 11 and the diaphragm / shutter 12 into an electrical signal, and outputs the electrical signal to the unit circuit 15. The CCD 13 is driven according to the timing signal generated by the TG 14.

  The unit circuit 15 includes a CDS (Correlated Double Sampling) circuit that holds the imaging signal output from the CCD 13 by correlated double sampling, an AGC (Automatic Gain Control) circuit that performs automatic gain adjustment of the imaging signal after the sampling, It is composed of an A / D converter that converts an analog imaging signal after automatic gain adjustment into a digital signal. The unit circuit 15 is driven according to the timing signal generated by the TG 14. The image pickup signal of the CCD 13 is sent to the image processing unit 16 as a digital signal through the unit circuit 15.

  The image processing unit 16 performs image processing (pixel interpolation processing, γ correction, generation of luminance / color difference signals, white balance processing, exposure correction processing, etc.) of image data sent from the unit circuit 15, and compression / decompression of image data ( For example, processing such as JPEG format, M-JPEG format, or MPEG format compression / expansion), captured image trimming, captured image digital zoom, and the like are performed. The image processing unit 16 is driven according to the timing signal generated by the TG 14.

  The CPU 18 is a one-chip microcomputer that controls each unit of the imaging device 10. In particular, in the present embodiment, the CPU 18 controls the lens driving unit 17 for zoom / wide operation and autofocus, image processing for the captured image by the image processing unit 16, bracket shooting processing, and the captured image display unit 22. Control the display operation (live view display).

  The DRAM 19 is used as a buffer memory for temporarily storing image data sent to the CPU 18 after being imaged by the CCD 13 and also as a working memory for the CPU 18. The CPU 18 controls the captured image stored in the DRAM 19 to perform the above-described processing. The memory 20 stores a program necessary for controlling each unit of the imaging apparatus 10 by the CPU 18 and data necessary for controlling each unit, and the CPU 18 performs processing according to this program. The flash memory 21 and the memory card 25 are recording media for storing image data captured by the CCD 13.

  The display unit 22 includes a color liquid crystal display and a driving circuit thereof, and displays a captured image captured by the CCD 13 as a live view image when in an imaging standby state. When reproducing a recorded image, the display unit 22 Display the recorded image read from the card 25 and expanded. The key input unit 23 includes an operation key 23c such as a shutter button 23a, a shooting mode setting dial 23b, a zoom switch, a SET key, and a cross key, and outputs an operation signal according to a user's key operation to the CPU 18. A memory card 25 is detachably attached to the card I / F 24 via a card slot (not shown) of the image pickup apparatus 10 main body.

  In particular, in the present embodiment, the CPU 18 adjusts the color shift direction of the white balance according to the shooting scene (sunset, night view) and the light source (sunlight, fluorescent lamp, etc.) during bracket shooting. For example, if the shooting scene is sunset, the shift is in the blue-magenta direction, and if it is a night view, the shift is in the green-red direction. If the light source is sunlight, the light is shifted in the cyan-red direction. If the light source is fluorescent, the light is shifted in the cyan-yellow direction. Otherwise, the light is shifted in the blue-yellow direction. Further, the CPU 18 adjusts the shift correction amount in the color shift direction according to the brightness of the image (bright, appropriate, dark). For example, the shift correction amount in the color shift direction is increased (for example, + 5%) when bright, and the shift correction amount is decreased (for example, −5%) when dark.

B. Operation of Embodiment Next, the operation of the above-described embodiment will be described.
In the following, a case of white balance × brightness free shooting (when shooting scene determination, light source determination, and brightness axis parameters are used) will be described.

  2 to 7 are flowcharts for explaining the bracket shooting operation of the imaging apparatus according to the present embodiment. FIG. 8 is a schematic diagram illustrating an example of thumbnails displayed after bracket shooting of the imaging apparatus according to the present embodiment.

  First, when the bracket shooting mode is set, the CPU 18 initializes a white balance gain in accordance with the light source (sunlight, fluorescent lamp, etc.) set at that time (step S10). Next, the CPU 18 generates a live view image from the captured image captured from the CCD 13 (step S12), and displays the generated live view image on the display unit 22 (step S14). Next, the CPU 18 determines whether or not a shutter button (not shown) has been pressed (step S16). If the shutter button is not pressed (NO in step S16), the process returns to step S12, and the generation and display of the live view image are repeated.

  On the other hand, when the shutter button is pressed (YES in step S16), the CPU 18 determines whether or not the shooting scene determination is sunset based on the captured image captured from the CCD 13 (step S18). If the shooting scene determination is not sunset (NO in step S18), the CPU 18 determines whether or not the shooting scene determination is a night view (step S20). If the shooting scene determination is not a night view (NO in step S20), the CPU 18 determines whether the light source is sunlight based on the captured image captured from the CCD 13 (step S22). If the light source is not sunlight (NO in step S22), the CPU 18 determines whether or not the light source is a fluorescent lamp (step S24). If the light source is not a fluorescent lamp (NO in step S24), it is determined that the light source is another light source (such as a light bulb).

  On the other hand, when the shooting scene determination is sunset (YES in step S18), the CPU 18 determines whether or not the brightness parameter is appropriate based on the captured image captured from the CCD 13 (FIG. 3). Step S26). If the brightness parameter is appropriate (YES in step S26), the CPU 18 sets the color shift direction of the white balance to the blue-magenta direction and the shift amount (default; eg, 10%) (step). S28). Thereafter, the CPU 18 captures the image with the CCD 13, and with respect to the captured image, the white balance color is shifted in the blue direction (10%), standard (0%), and shifted in the magenta direction (10%). Shake image processing is performed (bracketing), and each image is stored in the memory card 25 (step S36). Next, the CPU 18 creates thumbnails of the bracketed images and displays them on the display unit 22 as shown in FIG. 8A (step S38). In this case, an image shifted in the blue direction by a shift amount (10%) and an image shifted in the magenta direction by a shift amount (10%) are displayed centering on an image having a standard color (no shift). . Thereafter, the process returns to step S12 in FIG.

  On the other hand, if the brightness parameter is not appropriate (NO in step S26), the CPU 18 determines whether or not the brightness parameter is (−) based on the captured image captured from the CCD 13 (step S26). S30). If the brightness parameter is (-) (YES in step S30), the CPU 18 sets the color shift direction of white balance to the blue-magenta direction and the shift correction amount to -5%. (Step S32). Thereafter, the CPU 18 captures the image with the CCD 13, and with respect to the captured image, the white balance color is shifted in the blue direction (10%), standard (0%), and shifted in the magenta direction (10%). Shake image processing (bracketing), and after correcting (color shifting) according to the white balance (blue-magenta, shift correction amount (-5%)), the image is stored in the memory card 25 (step S36). . Next, the CPU 18 creates a thumbnail of the bracketed image and displays it on the display unit 22 as shown in FIG. 8B (step S38). In this case, an image shifted in the blue direction by a shift amount (5%) and an image shifted in the magenta direction by a shift amount (5%) are displayed centering on an image having a standard color (no shift). . Thereafter, the process returns to step S12 in FIG.

  On the other hand, when the brightness parameter is not (−) (NO in step S30), the brightness parameter is (+), so the CPU 18 changes the white balance color shift direction to the blue-magenta direction. In addition, the shift correction amount is set to + 5% (step S34). Thereafter, the CPU 18 captures the image with the CCD 13, and with respect to the captured image, the white balance color is shifted in the blue direction (10%), standard (0%), and shifted in the magenta direction (10%). Shake image processing is performed (bracketing), and after correction processing (color shift) according to the white balance (blue-magenta, shift correction amount (+ 5%)), the image is stored in the memory card 25 (step S36). Next, the CPU 18 creates a thumbnail of the bracketed image and displays it on the display unit 22 as shown in FIG. 8C (step S38). In this case, an image shifted in the blue direction by a shift amount (15%) and an image shifted in the magenta direction by a shift amount (15%) are displayed centering on an image having a standard color (no shift). . Thereafter, the process returns to step S12 in FIG.

  On the other hand, when the shooting scene determination is a night view (YES in step S20 in FIG. 2), the CPU 18 determines whether or not the brightness parameter is appropriate based on the captured image captured from the CCD 13 ( Step S40 in FIG. 4). If the brightness parameter is appropriate (YES in step S40), the CPU 18 sets the color shift direction of white balance to the green-red direction and the shift amount (default; eg, 10%) (step). S42). Thereafter, the CPU 18 captures the image with the CCD 13, and with respect to the captured image, the white balance color is shifted in the green direction (10%), standard (0%), and shifted in the red direction (10%). Shake image processing is performed (bracketing), and each image is stored in the memory card 25 (step S50). Next, the CPU 18 creates a thumbnail of the bracketed image and displays it on the display unit 22 (step S52). In this case, an image shifted in the green direction by a shift amount (10%) and an image shifted in the red direction by a shift amount (10%) are displayed centering on an image having a standard color (no shift). . Thereafter, the process returns to step S12 in FIG.

  On the other hand, if the brightness parameter is not appropriate (NO in step S40), the CPU 18 determines whether the brightness parameter is (-) based on the captured image captured from the CCD 13 (step). S44). If the brightness parameter is (-) (YES in step S44), the CPU 18 sets the white balance color shift direction to the green-red direction and the shift correction amount to -5%. (Step S46). Thereafter, the CPU 18 captures the image with the CCD 13, and with respect to the captured image, the white balance color is shifted in the green direction (10%), standard (0%), and shifted in the red direction (10%). Shake image processing (bracketing), and after correcting (color shifting) according to the white balance (green-red, shift correction amount (-5%)), the image is stored in the memory card 25 (step S50). . Next, the CPU 18 creates a thumbnail of the bracketed image and displays it on the display unit 22 (step S52). In this case, an image shifted in the green direction by the shift amount (5%) and an image shifted in the red direction by the shift amount (5%) are displayed centering on an image having a standard color (no shift). . Thereafter, the process returns to step S12 in FIG.

  On the other hand, if the brightness parameter is not (-) (NO in step S44), the brightness parameter is (+), so the CPU 18 changes the white balance color shift direction to the green-red direction. In addition, the shift correction amount is set to + 5% (step S48). Thereafter, the CPU 18 captures the image with the CCD 13, and with respect to the captured image, the white balance color is shifted in the green direction (10%), standard (0%), and shifted in the red direction (10%). Shake image processing is performed (bracketing), and after correction processing (color shift) according to the white balance (green-red, shift correction amount (+ 5%)), the image is stored in the memory card 25 (step S50). Next, the CPU 18 creates a thumbnail of the bracketed image and displays it on the display unit 22 (step S52). In this case, an image shifted in the green direction by the shift amount (15%) and an image shifted in the red direction by the shift amount (15%) are displayed centering on an image having a standard color (no shift). . Thereafter, the process returns to step S12 in FIG.

  On the other hand, when the light source determination is sunlight (YES in step S22 in FIG. 2), the CPU 18 determines whether or not the brightness parameter is appropriate based on the captured image captured from the CCD 13 ( Step S54 in FIG. If the brightness parameter is appropriate (YES in step S54), the CPU 18 sets the color shift direction of the white balance to the cyan-red direction and the shift amount (default; for example, 10%) (step). S56). Thereafter, the CPU 18 captures the image with the CCD 13, and with respect to the captured image, the white balance color is shifted in the cyan direction (10%), standard (0%), and shifted in the red direction (10%). Shake image processing is performed (bracketing), and each image is stored in the memory card 25 (step S64). Next, the CPU 18 creates a thumbnail of the bracketed image and displays it on the display unit 22 (step S66). In this case, an image shifted in the cyan direction by a shift amount (10%) and an image shifted in the red direction by a shift amount (10%) are displayed centering on an image having a standard color (no shift). . Thereafter, the process returns to step S12 in FIG.

  On the other hand, if the brightness parameter is not appropriate (NO in step S54), the CPU 18 determines whether the brightness parameter is (-) based on the captured image captured from the CCD 13 (step S54). S58). If the brightness parameter is (-) (YES in step S58), the CPU 18 sets the color shift direction of white balance to the cyan-red direction and the shift correction amount to -5%. (Step S60). Thereafter, the CPU 18 captures the image with the CCD 13, and with respect to the captured image, the white balance color is shifted in the cyan direction (10%), standard (0%), and shifted in the red direction (10%). Shake image processing (bracketing), and after correcting (color shifting) according to the white balance (cyan-red, shift correction amount (-5%)), the image is stored in the memory card 25 (step S64). . Next, the CPU 18 creates a thumbnail of the bracketed image and displays it on the display unit 22 (step S66). In this case, an image shifted in the cyan direction by a shift amount (5%) and an image shifted in the red direction by a shift amount (5%) are displayed centering on an image having a standard color (no shift). . Thereafter, the process returns to step S12 in FIG.

On the other hand, when the brightness parameter is not (−) (NO in step S58), the brightness parameter is (+), so the CPU 18 changes the white balance color shift direction to the cyan-red direction. In addition, the shift correction amount is set to + 5% (step S62). Thereafter, the CPU 18 captures the image with the CCD 13, and with respect to the captured image, the white balance color is shifted in the cyan direction (10%), standard (0%), and shifted in the red direction (10%). Shake image processing is performed (bracketing), and after correction processing (color shift) according to the white balance (cyan - red, shift correction amount (+ 5%)), the image is stored in the memory card 25 (step S64). Next, the CPU 18 creates a thumbnail of the bracketed image and displays it on the display unit 22 (step S66). In this case, an image shifted in the cyan direction by a shift amount (15%) and an image shifted in the red direction by a shift amount (15%) are displayed centering on an image having a standard color (no shift). . Thereafter, the process returns to step S12 in FIG.

  On the other hand, when the light source determination is a fluorescent lamp (YES in step S24 in FIG. 2), the CPU 18 determines whether or not the brightness parameter is appropriate based on the captured image captured from the CCD 13 ( Step S68 in FIG. 6). If the brightness parameter is appropriate (YES in step S68), the CPU 18 sets the color shift direction of the white balance to the cyan-yellow direction and the shift amount (default; eg, 10%) (step). S70). Thereafter, the CPU 18 captures the image with the CCD 13, and with respect to the captured image, the white balance color is shifted in the cyan direction (10%), standard (0%), and shifted in the yellow direction (10%). Shake image processing is performed (bracketing), and each image is stored in the memory card 25 (step S78). Next, the CPU 18 creates a thumbnail of the bracketed image and displays it on the display unit 22 (step S80). In this case, an image shifted in the cyan direction by a shift amount (10%) and an image shifted in the yellow direction by a shift amount (10%) are displayed centering on an image having a standard color (no shift). . Thereafter, the process returns to step S12 in FIG.

  On the other hand, if the brightness parameter is not appropriate (NO in step S68), the CPU 18 determines whether the brightness parameter is (-) based on the captured image captured from the CCD 13 (step S68). S72). If the brightness parameter is (-) (YES in step S70), the CPU 18 sets the color shift direction of white balance to the cyan-yellow direction and the shift correction amount to -5%. (Step S74). Thereafter, the CPU 18 captures the image with the CCD 13, and with respect to the captured image, the white balance color is shifted in the cyan direction (10%), standard (0%), and shifted in the yellow direction (10%). Shake image processing (bracketing), and after correcting (color shifting) according to the white balance (cyan-yellow, shift correction amount (-5%)), the image is stored in the memory card 25 (step S78). . Next, the CPU 18 creates a thumbnail of the bracketed image and displays it on the display unit 22 (step S80). In this case, an image shifted in the cyan direction by a shift amount (5%) and an image shifted in the yellow direction by a shift amount (5%) are displayed centering on an image having a standard color (no shift). . Thereafter, the process returns to step S12 in FIG.

On the other hand, if the brightness parameter is not (−) (NO in step S72), the brightness parameter is (+), so the CPU 18 changes the white balance color shift direction to the cyan-yellow direction. In addition, the shift correction amount is set to + 5% (step S76). Thereafter, the CPU 18 captures the image with the CCD 13, and with respect to the captured image, the white balance color is shifted in the cyan direction (10%), standard (0%), and shifted in the yellow direction (10%). Shake image processing is performed (bracketing), and after correction processing (color shift) according to the white balance (cyan-yellow, shift correction amount (+ 5%)), the image is stored in the memory card 25 (step S78). Next, the CPU 18 creates a thumbnail of the bracketed image and displays it on the display unit 22 (step S80). In this case, color is centered on the image of the standard (no shift), the shift amount (15%) with the shifted image to the cyan direction, shifted image is displayed at the shift amount (15%) the yellow direction The Thereafter, the process returns to step S12 in FIG.

  On the other hand, when the light source determination is other (such as a light bulb) (NO in step S24 in FIG. 2), the CPU 18 determines whether or not the brightness parameter is appropriate based on the captured image captured from the CCD 13. Judgment is made (step S82 in FIG. 7). If the brightness parameter is appropriate (YES in step S82), the CPU 18 sets the color shift direction of the white balance to the blue-yellow direction and the shift amount (default; for example, 10%) (step). S84). Thereafter, the CPU 18 captures the image with the CCD 13, and the white balance color of the captured image is shifted in the blue direction (10%), standard (0%), and shifted in the yellow direction (10%). Shake image processing is performed (bracketing), and each image is stored in the memory card 25 (step S92). Next, the CPU 18 creates thumbnails of the bracketed images and displays them on the display unit 22 (step S94). In this case, an image shifted in the blue direction with a shift amount (10%) and an image shifted in the yellow direction with a shift amount (10%) are displayed centering on an image having a standard color (no shift). . Thereafter, the process returns to step S12 in FIG.

  On the other hand, if the brightness parameter is not appropriate (NO in step S82), the CPU 18 determines whether or not the brightness parameter is (−) based on the captured image captured from the CCD 13 (step S82). S86). If the brightness parameter is (-) (YES in step S86), the CPU 18 sets the color shift direction of white balance to the blue-yellow direction and the shift correction amount to -5%. (Step S88). Thereafter, the CPU 18 captures the image with the CCD 13, and the white balance color of the captured image is shifted in the blue direction (10%), standard (0%), and shifted in the yellow direction (10%). Shake image processing (bracketing), and after correcting (color shifting) according to the white balance (blue-yellow, shift correction amount (-5%)), the image is stored in the memory card 25 (step S92). . Next, the CPU 18 creates thumbnails of the bracketed images and displays them on the display unit 22 (step S94). In this case, an image shifted in the blue direction by a shift amount (5%) and an image shifted in the yellow direction by a shift amount (5%) are displayed centering on an image having a standard color (no shift). . Thereafter, the process returns to step S12 in FIG.

  On the other hand, when the brightness parameter is not (−) (NO in step S86), the brightness parameter is (+), so the CPU 18 changes the color shift direction of the white balance to the blue-yellow direction. In addition, the shift correction amount is set to + 5% (step S90). Thereafter, the CPU 18 captures the image with the CCD 13, and the white balance color of the captured image is shifted in the blue direction (10%), standard (0%), and shifted in the yellow direction (10%). Shake image processing is performed (bracketing), and after correction processing (color shift) according to the white balance (blue-yellow, shift correction amount (+ 5%)), the image is stored in the memory card 25 (step S92). Next, the CPU 18 creates thumbnails of the bracketed images and displays them on the display unit 22 (step S94). In this case, an image shifted in the blue direction by a shift amount (15%) and an image shifted in the yellow direction by a shift amount (15%) are displayed centering on an image having a standard color (no shift). . Thereafter, the process returns to step S12 in FIG.

  Here, an example of a method of shifting the white balance gain will be described. A case of shifting in the blue direction as a white balance gain shift will be described.

First,
(R gain, B gain) = (480,450)
Blue shift amount (0%, 10%): Shift correction amount according to default brightness (± 5%)
And

Combines color shift and brightness adjustment parameters.
If the brightness axis is correct,
R gain = 480 * (100+ (0 ± 0)) / 100 = 480
B gain = 450 * (100+ (10 ± 0)) / 100 = 495
It becomes.

If the brightness axis is (-),
R gain = 480 * (100+ (0-5)) / 100 = 456
B gain = 450 * (100+ (10−5)) / 100 = 472 (rounded down)
It becomes.

If the brightness axis is (+),
R gain = 480 * (100+ (0 + 5)) / 100 = 504
B gain = 450 * (100+ (10 + 5)) / 100 = 517 (rounded down)
It becomes.

According to the above-described embodiment , during bracket shooting (white shooting) related to white balance, the shooting parameters are not fixed, but based on the results of scene determination, light source determination, and brightness determination, the color shift direction and color of white balance By automatically changing the shift amount, it is possible to automatically set the shooting parameters according to the shooting situation, and it is possible to take a more impressive image.

In the above-described embodiment, the color shift direction and the color shift amount of the white balance are changed depending on the result of the scene determination, the light source determination, the brightness determination, and the like. Whether or not (dark place) is determined may be determined, and in the case of low light, the color shift amount is reduced.

  Also, in the above-described embodiment, in the case of bracket shooting (biaxial) in which other shooting parameters are shaken in addition to white balance, the shift amount of the white balance color gain is similarly changed by using other shooting parameters. It can be carried out. For example, when the other shooting parameter is brightness, as in the above-described embodiment, the white balance color is shaken in the uniaxial direction (three), and the brightness is further shaken in the biaxial direction (3 2) Increase the shift amount when shaken toward the brighter side, and decrease the shift amount when shaken toward the darker side. Further, the shift correction amount may be changed depending on the brightness swing amount.

  FIG. 9 is a schematic diagram illustrating an example of a thumbnail displayed after bracket shooting (biaxial) of the imaging apparatus according to the present embodiment. FIG. 9 shows thumbnails when the shooting scene is “sunset” in the case of bracket shooting (two axes) in which brightness is varied in addition to white balance. In this case, the white balance is set in the horizontal axis direction and the brightness is set in the vertical axis direction. If the brightness is (-), the shift correction amount (-5%) is corrected (color shift) in the blue-magenta direction (bottom), and if the brightness is (appropriate), blue -If the color is shifted by the shift amount (default: 10%) in the magenta direction (middle stage) and the brightness is (+), it is corrected (color shift) by the shift correction amount (+ 5%) in the blue-magenta direction. (Top row). As a result, a plurality of shooting parameters can be set variously according to the shooting situation, and a more impressive image can be shot.

  Further, in the above-described embodiment, in addition to the color shift direction of white balance, it may be shaken in the color direction in the UV color space. FIG. 10 is a conceptual diagram showing an example of changing the imaging parameter using the UV color space in the present embodiment. As shown in FIG. 10, an impressive image with more emphasized change is shot by shaking the strongest color (◯) of the shot image in the color direction (●) with the origin O of the UV color space as a point target. Can do. Also in this case, the shift amount may be adjusted according to the brightness of the image.

As mentioned above, although several embodiment of this invention was described, this invention is not limited to these, The invention described in the claim, and its equal range are included.
Below, the invention described in the claims of the present application is appended.

(Appendix 1)
The invention according to attachment 1 includes an imaging unit, a determination unit that determines a shooting situation by the imaging unit, and an imaging by the imaging unit while changing a shooting parameter based on the shooting situation determined by the determination unit. And a control unit that acquires a plurality of images.

(Appendix 2)
The invention described in appendix 2 is the imaging apparatus according to appendix 1, wherein the control unit changes, as the shooting parameter, a color shift direction of white balance at the time of shooting based on the shooting situation. is there.

(Appendix 3)
The invention according to attachment 3 is characterized in that the control means changes the color shift amount of the white balance based on the shooting situation in addition to the color shift direction of the white balance at the time of shooting as the shooting parameter. The imaging apparatus according to Supplementary Note 1 or 2, which is a feature.

(Appendix 4)
In the invention according to appendix 4, the determination unit determines a shooting scene at the time of shooting as the shooting state, and the control unit determines, as the shooting parameter, if the shooting scene is determined to be sunset, The imaging apparatus according to appendix 1, wherein the color shift direction of white balance at the time of shooting is changed between blue and magenta.

(Appendix 5)
According to the fifth aspect of the present invention, when the control unit determines that the shooting scene is a night view, the control unit changes the color shift direction of white balance at the time of shooting to green and red as the shooting parameter. The imaging apparatus according to appendix 4, characterized by:

(Appendix 6)
In the invention according to appendix 6, the determination unit determines a light source at the time of shooting as the shooting state, and the control unit sets the shooting parameter as the shooting parameter when it is determined that the light source is sunlight. The imaging apparatus according to appendix 1, wherein the color shift direction of the white balance at the time is changed to cyan and red.

(Appendix 7)
The invention according to appendix 7, wherein the control means changes the color shift direction of white balance at the time of photographing to cyan and yellow directions as the photographing parameter when it is determined that the light source is a fluorescent lamp. The imaging apparatus according to appendix 6, characterized by:

(Appendix 8)
In the invention according to appendix 8, the control means determines that the color shift direction of white balance at the time of photographing is in the blue and yellow directions as the photographing parameter when it is determined that the light source is other than sunlight or a fluorescent lamp. The imaging apparatus according to appendix 7, wherein the imaging apparatus is changed.

(Appendix 9)
In the invention according to attachment 9, the determination unit determines whether the brightness at the time of shooting is greater than a predetermined threshold as the shooting state, and the control unit determines that the brightness is a predetermined threshold value. When it is determined that the brightness is larger, the color shift amount of white balance at the time of shooting is increased as the shooting parameter, and when the brightness is determined to be smaller than a predetermined threshold, the white balance at the time of shooting is determined. The image pickup apparatus according to any one of appendices 1 to 8, wherein the amount of color shift is reduced.

(Appendix 10)
In the invention according to attachment 10, the control unit acquires a plurality of images captured by the imaging unit while changing a plurality of imaging parameters based on the imaging state determined by the determination unit. The imaging apparatus according to appendix 1, characterized by:

(Appendix 11)
In the invention according to attachment 11, at least one of the plurality of shooting parameters is white balance at the time of shooting, at least one is brightness, and the control unit is configured to When the color shift direction of white balance at the time of shooting is changed and it is determined that the brightness of each of the acquired plurality of images is greater than a predetermined threshold, the color shift amount of white balance at the time of shooting is increased. When the brightness is determined to be smaller than a predetermined threshold, the color shift amount of white balance at the time of shooting is reduced.

(Appendix 12)
The invention according to attachment 12 is a method for controlling an imaging apparatus including an imaging unit, wherein a step of determining a shooting situation by the imaging unit and changing a shooting parameter based on the determined shooting situation Obtaining a plurality of images picked up by the image pickup means.

(Appendix 13)
The invention according to appendix 13 is directed to a computer that controls an imaging apparatus including an imaging unit, a function for determining a shooting situation by the imaging unit, and the imaging while changing shooting parameters based on the determined shooting situation. A program for realizing a function of acquiring a plurality of images picked up by means.

DESCRIPTION OF SYMBOLS 10 Imaging device 11 Imaging lens 12 Shutter / shutter 13 CCD
14 TG (Timing Generator)
15 Unit Circuit 16 Image Processing Unit 17 Lens Drive Unit 18 CPU
19 DRAM
20 Memory 21 Flash Memory 22 Display Unit 23 Key Input Unit 24 Card I / F
25 Memory card

Claims (11)

Imaging means;
Determination means for determining a shooting situation by the imaging means;
Control means for acquiring a plurality of images taken by the imaging means while changing a shooting parameter based on the shooting situation determined by the determination means;
With
The determination means determines the type of light source at the time of shooting as the shooting situation,
The control means changes the color shift direction of white balance at the time of photographing to a cyan direction and a red direction as the photographing parameter when it is determined that the light source type is sunlight, or the light source type Is determined to be a fluorescent lamp, the color shift direction of white balance at the time of shooting is changed to the cyan direction and the yellow direction as the shooting parameter, or the light source type is not sunlight and is a fluorescent lamp. If it is determined that there is not, the color shift direction of white balance at the time of shooting is changed to the blue direction and the yellow direction as the shooting parameter.
An imaging apparatus characterized by that. The control means changes the color shift direction of the white balance and the color shift amount of the white balance at the time of shooting as the shooting parameters based on the shooting situation.
The imaging apparatus according to claim 1. The determination means determines the type of shooting scene at the time of shooting as the shooting situation,
The control means changes the color shift direction of the white balance at the time of photographing to a blue direction and a magenta direction as the photographing parameter when it is determined that the type of the photographing scene is sunset, or the photographing When it is determined that the scene type is a night view, the color shift direction of the white balance at the time of shooting is changed to a green direction and a red direction as the shooting parameter.
The imaging apparatus according to claim 1. Imaging means;
Determination means for determining a shooting situation by the imaging means;
Control means for acquiring a plurality of images taken by the imaging means while changing a shooting parameter based on the shooting situation determined by the determination means;
With
The determination means determines whether the brightness at the time of shooting is larger than a predetermined threshold as the shooting situation,
When it is determined that the brightness is greater than the predetermined threshold, the control unit increases a color shift amount of white balance at the time of shooting as the shooting parameter, and the brightness is higher than the predetermined threshold. If it is determined that the threshold value is small or equal to the predetermined threshold value, the color shift amount of white balance at the time of shooting is reduced.
An imaging apparatus characterized by that. The shooting parameters include white balance at the time of shooting and brightness at the time of shooting.
The imaging apparatus according to claim 4 . An image pickup apparatus control method comprising an image pickup means,
A determination step of determining a shooting situation by the imaging means;
A control step of acquiring a plurality of images taken by the imaging means while changing a shooting parameter based on the shooting situation determined in the determination step;
Including
In the determination step, as the shooting situation, the type of light source at the time of shooting is determined,
In the control step, when it is determined that the type of the light source is sunlight, the color shift direction of white balance at the time of shooting is changed to the cyan direction and the red direction as the shooting parameter, or the light source of the light source When it is determined that the type is a fluorescent lamp, the color shift direction of white balance at the time of shooting is changed to the cyan direction and the yellow direction as the shooting parameter, or the type of the light source is not sunlight and the fluorescent lamp However, when it is determined that the white balance color shift direction at the time of shooting is changed to the blue direction and the yellow direction as the shooting parameter,
A control method characterized by that. An image pickup apparatus control method comprising an image pickup means,
A determination step of determining a shooting situation by the imaging means;
A control step of acquiring a plurality of images taken by the imaging means while changing a shooting parameter based on the shooting situation determined in the determination step;
Including
In the determination step, it is determined whether the brightness at the time of shooting is larger than a predetermined threshold as the shooting state,
In the control step, when it is determined that the brightness is larger than the predetermined threshold, the amount of white balance color shift at the time of shooting is increased as the shooting parameter, and the brightness is higher than the predetermined threshold. Is smaller or equal to the predetermined threshold value, the color shift amount of white balance at the time of shooting is reduced.
A control method characterized by that. The shooting parameters include white balance at the time of shooting and brightness at the time of shooting.
The control method according to claim 7 . In a computer that controls an imaging apparatus including an imaging means,
A determination function for determining a shooting situation by the imaging means;
A control function for acquiring a plurality of images taken by the imaging means while changing a shooting parameter based on the determined shooting situation;
Realized,
The determination function determines the type of light source at the time of shooting as the shooting situation,
In the control function, when it is determined that the type of the light source is sunlight, the color shift direction of white balance at the time of shooting is changed to the cyan direction and the red direction as the shooting parameter, or the type of the light source Is determined to be a fluorescent lamp, the color shift direction of white balance at the time of shooting is changed to the cyan direction and the yellow direction as the shooting parameter, or the light source type is not sunlight and is a fluorescent lamp. If it is determined that there is not, the color shift direction of white balance at the time of shooting is changed to the blue direction and the yellow direction as the shooting parameter.
A program characterized by that. In a computer that controls an imaging apparatus including an imaging means,
A determination function for determining a shooting situation by the imaging means;
A control function for acquiring a plurality of images taken by the imaging means while changing a shooting parameter based on the determined shooting situation;
Realized,
In the determination function, as the shooting state, it is determined whether or not the brightness at the time of shooting is larger than a predetermined threshold,
In the control function, when it is determined that the brightness is larger than the predetermined threshold, the color shift amount of white balance at the time of shooting is increased as the shooting parameter, and the brightness is higher than the predetermined threshold. If it is determined that the threshold value is small or equal to the predetermined threshold value, the color shift amount of white balance at the time of shooting is reduced.
A program characterized by that. The shooting parameters include white balance at the time of shooting and brightness at the time of shooting.
The program according to claim 10 .

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