JP5355124B2 - Imaging apparatus and scene discrimination method thereof - Google Patents

Description

  The present invention relates to an imaging apparatus that discriminates a scene from an image and a scene discrimination method thereof.

  2. Description of the Related Art In recent years, imaging apparatuses having a scene discrimination function that can automatically discriminate a shooting scene without manually performing camera shooting settings have become widespread. The scene discriminating function discriminates a scene to be photographed from a plurality of scenes such as “night view”, “evening view”, “backlight”, etc. based on luminance information and color information in the screen.

  Conventionally, as this discriminating method, there is known a method for discriminating scenes in consideration of the tendency of arrangement of luminance information and color information corresponding to a specific scene in an image, and taking into account their position and area ratio variation. (See Patent Document 1).

  For example, if it is determined that it is a “night scene”, the subject is estimated to be a stationary object with low brightness and a distant object, so the camera takes a long second exposure without flashing. In order to make the noise inconspicuous, the photographing sensitivity is set to be low. That is, when it is determined as “night scene”, the exposure time is set longer and the photographing sensitivity is set lower than when it is not determined as “night scene” even though the luminance of the subject is equal.

  Also, if it is determined that the scene is “Evening”, the subject to be photographed is strongly reddish and exists far away, so that the camera shoots without flashing and the redness is emphasized. It is set to perform image processing.

  On the other hand, if it is determined as “backlight”, the camera is set to set the exposure control value by increasing the weight of the dark area in the center, and to take a picture with a flash.

  The setting of the camera according to the scene discrimination result is not limited to the main shooting in which a still image is recorded on a recording medium, and is also applied to the stage of the live view mode, which is the previous stage. The live view mode is a mode in which a moving image obtained by capturing a subject in real time is displayed on a monitor. In the live view mode, scene discrimination is periodically repeated, and each time the scene discrimination result is changed, the camera setting is changed according to the discrimination result.

JP-A-2005-310123

  However, the conventional imaging device has the following problems. For example, when the “night scene” scene determination is performed using only luminance information and color information, an undesired image may be captured depending on the subject and camera conditions. In other words, when it is determined as “night scene”, the imaging sensitivity is set low and the shutter speed is set to a long time, so even if the camera moves slightly or the subject moves slightly, I could be shaken.

  Therefore, when determining “night scene”, it is conceivable to consider not only luminance information and color information but also movement of the subject and movement of the camera itself. If the subject is moving or the camera itself is moving, the captured image is expected to be blurred, so even if the luminance information and color information satisfy the “night scene” conditions, the camera What is necessary is just to discriminate | determine that it is scenes other than a "night view." By doing so, compared with the case where it is determined as “night scene”, since the photographing sensitivity is set high and the exposure time is set short, the photographed image is hardly blurred.

  However, even if no movement is detected in either the camera or the subject, and it is determined that it is a “night scene” based on the luminance information and color information of the subject, if the camera is subsequently operated, Will move. For this reason, even if it is determined that the scene is “night scene”, it has been found that every time the camera is operated, it is determined that the camera is moving, and a new problem arises that it is out of the “night scene” mode.

  Therefore, the present invention intends to provide an imaging apparatus capable of appropriately discriminating a “night scene” scene and a scene discrimination method thereof.

In order to achieve the above object, an imaging apparatus according to the present invention includes an imaging unit that acquires an image, and includes an apparatus motion information detection unit that detects motion information of the imaging apparatus, and the imaging unit. Subject motion information detection means for detecting motion information of a subject in the acquired image, information acquisition means for acquiring luminance information and color information in the image acquired by the imaging means, and acquired by the imaging means Scene discriminating means for repeatedly discriminating a scene from an image, wherein the scene discriminating means is detected by the device motion information detecting means to be free of movement of the imaging device, and the subject motion information detecting means detects movement of the subject. is detected that there is no, and if the luminance information and the color information satisfies a predetermined condition, it is determined that the night scene, the night view When a new scene is discriminated in a state where it is discriminated, a new scene is created based on the motion information of the subject, the luminance information and the color information without using the motion information of the imaging device. There was determined whether or not the night scene, in a state that is not determined to the a night scene, if performing the determination of new scene, the motion information of the previous SL imaging apparatus, the movement information of the object, the intensity Based on the information and the color information, it is determined whether or not a new scene is the night view .

In order to achieve the above object, a scene discrimination method for an imaging apparatus according to the present invention is a scene discrimination method for an imaging apparatus having an imaging means for acquiring an image, and apparatus motion information for detecting motion information of the imaging apparatus. A detection step, a subject motion information detection step for detecting motion information of a subject in the image acquired by the imaging means, and an information acquisition step for acquiring luminance information and color information in the image acquired by the imaging means; A scene discrimination step of repeatedly discriminating a scene from the image acquired by the imaging means, and in the scene discrimination step, the device motion information detection step detects that there is no movement of the imaging device, and the subject The motion information detection step detects that there is no motion of the subject, and the luminance information and color information are preliminarily determined. If it meets the conditions specified, it is determined that the night scene, the state that is determined to the a night scene, in the case of a new determination of the scene, without using motion information of the imaging device, wherein Based on the movement information of the subject, the luminance information, and the color information, it is determined whether or not the new scene is the night view , and a new scene is determined in a state where it is not determined that the night scene. if the motion information of the previous SL imaging apparatus which performs motion information of the object, on the basis of the luminance information and the color information, a new scene and discriminates whether or not the night scene.

The image pickup apparatus according to the present invention has the motion information, luminance information, and color information of the subject without using the motion information of the image pickup apparatus when the scene is newly determined in the state where it is determined to be a night view. In addition, it is determined whether or not the new scene is a night view . Thus, due to the fact that moving the imaging device by the operation of the user can be prevented from being released "night scene" scene, also perform Nagabyo exposure when there is a possibility that the blur occurs in the subject Can not be. In this way, the “night scene” scene can be properly determined. Therefore, when the scene to be photographed is a night view, highly accurate scene discrimination and good image photographing can be performed.
Further, according to the imaging apparatus according to the present invention, after it is detected that there is no movement of the imaging device, when it is detected that there is no movement of the subject, so determined as night scene, conditions for photographing a night scene, for example, noise reduction Therefore, it is possible to set shooting conditions for reducing the shooting sensitivity and reducing the shutter speed.
Further, according to the imaging apparatus according to the present invention, when the luminance information and the color information satisfy predetermined conditions, it is determined as a night view , so that the scene can be accurately determined.

  According to the imaging device of the second aspect, since the motion information of the subject is acquired after detecting the motion information of the imaging device, it is possible to determine whether the scene is a night scene in an appropriate order.

According to the imaging apparatus of the third aspect , once a night scene is determined, it can be determined that it is not a night scene due to a slight change in image information or a slight movement of the subject. This makes it possible to shoot a stable night scene.

According to the imaging device of the fourth aspect, in the state where the image is determined to be a night view , the threshold value of the motion information of the subject is set larger than the threshold value of the motion information of the imaging device. Thus, even if the imaging device moves a little, it is not erroneously determined that the subject is moving.

According to the imaging apparatus of the fifth aspect , since image processing at the time of shooting is performed according to the type of scene, when it is determined that the shooting scene is a night view, in a scene with a low contrast ratio, a gamma correction is performed. By finely adjusting the tone, the contrast can be improved. In addition, an effect that can be improved by dark part correction can be expected for a darker area in the screen. Therefore, it is possible to perform image processing suitable for a night scene at the time of shooting using the imaging device.

It is a block diagram which shows the functional structure of the digital camera in embodiment. It is a flowchart which shows the procedure which discriminate | determines a night view.

  Embodiments of an imaging apparatus and a scene discrimination method thereof according to the present invention will be described with reference to the drawings. In this embodiment, a case where a digital camera is used as an example of the imaging device will be described.

  FIG. 1 is a block diagram showing a functional configuration of a digital camera in the embodiment. The operation unit 101 includes switches and buttons that are operated by an operator to input various instructions to the digital camera 10. The operation unit 101 also includes a shutter switch. When the shutter switch is half-pressed, the operation unit 101 notifies the control unit 102 of the signal SW1. On the other hand, when the shutter switch is fully pressed, the operation unit 101 notifies the control unit 102 of the signal SW2.

  The control unit 102 controls each unit illustrated in FIG. 1 in response to an instruction from the operation unit 101. The vertical / horizontal position detection unit 103 detects whether the orientation of the imaging apparatus (digital camera 10) is the vertical shooting position or the horizontal shooting position. The CCD unit 104 receives light incident through the lens 105, the correction lens 106, and the exposure mechanism 107, and outputs charges corresponding to the light amount.

  The correction lens 106 receives the lens position correction amount calculated by the control unit 102 from the correction lens control unit 109 corresponding to the movement of the imaging device detected by the device motion detection unit 108, and receives an image of the movement of the imaging device. Correct blurring.

  The A / D conversion unit 110 performs signal processing such as sampling, gain adjustment, and A / D conversion on the analog image signal output from the CCD unit 104, and outputs the result as a digital image signal.

  The image processing unit 111 performs various types of image processing on the digital image signal output from the A / D conversion unit 110, and outputs a processed digital image signal. For example, the image processing unit 111 converts a digital image signal received from the A / D conversion unit 110 into a YUV image signal and outputs the YUV image signal.

  Based on the digital image signal received from the image processing unit 111 and the motion information of the apparatus received from the apparatus motion detection unit 108, the scene determination unit 112 uses “night view”, “backlight”, “evening view”, etc. It is determined which one of a plurality of scenes. For example, in this determination, a YUV image signal is used as the digital image signal received from the image processing unit 111.

  The device motion detection unit 108 (device motion information detection means) is equipped with, for example, a gyro sensor that detects angular velocities in a plurality of directions, and calculates the motion of the camera body from the sum of the angular velocities in each direction.

  When the scene determination unit 112 determines a specific scene, the control unit 102 sets an optimal shooting condition for shooting the scene. That is, the control unit 102 outputs a focus setting optimal for shooting to the AF processing unit 119, outputs an exposure setting to the AE processing unit 120, and outputs a sensitivity setting to the CCD unit 104.

  Further, the image processing unit 111 performs image processing such as gamma correction and color correction that are optimal for photographing the scene. The AF processing unit 119 operates the lens 105 to focus on the subject. In addition, the AE processing unit 120 controls the exposure mechanism 107 so that the screen is exposed optimally.

  When determining that the flash is necessary, the control unit 102 instructs the EF processing unit 113 to turn on the flash. When receiving the flash-on instruction, the EF processing unit 113 controls the flash unit 114. The flash unit 114 emits light according to this instruction.

  The EVF display unit 115 is configured with a small liquid crystal screen or the like, and displays an image according to the image data processed by the image processing unit 111.

  The format conversion unit 116 converts the format of the digital image signal (image data) output from the image processing unit 111 into a format such as JPEG, and outputs it to the image recording unit 117. The image recording unit 117 receives the format-converted image data received from the format conversion unit 116, a memory (not shown) in the digital camera 10, an external memory (not shown) inserted in the digital camera 10, and the like. Process to record.

  The external connection unit 118 functions as an interface for connecting the digital camera 10 to an external device such as a PC (personal computer) or a printer.

  Next, the operation of the digital camera when performing imaging using the digital camera having the above configuration will be described.

  First, when the operator of the digital camera 10 turns on a power switch included in the operation unit 101, the control unit 102 detects this and supplies power to each unit constituting the digital camera 10. When power is supplied to each unit constituting the digital camera 10, the shutter is opened, and the analog image signal generated by the CCD unit 104 is output as a digital image signal via the A / D conversion unit 110.

  This digital image signal is processed as needed by the image processing unit 111 and displayed as a real-time moving image of the subject on the EVF display unit 115, and the digital camera 10 functions as a live view mode.

  Based on the device motion information received from the device motion detection unit 108 and the digital image signal received from the image processing unit 111, the scene determination unit 112 uses “night view”, “backlight”, “evening view”, etc. To determine which one of the plurality of scenes. This scene discrimination is repeated unless the control unit 102 receives a signal SW1 notification from the shutter switch (that is, a half-press notification of the shutter switch).

  On the other hand, when the control unit 102 receives the notification of the signal SW1 from the shutter switch, the control unit 102 performs AF and AE processing using the image at this time, and acquires the optimum focus and exposure setting conditions for photographing.

  Then, the control unit 102 returns the processing before receiving the notification of the signal SW1 and repeats the above processing, unless receiving the notification of the signal SW2 from the shutter switch (that is, notification of full pressing of the shutter switch).

  On the other hand, when receiving the notification of the signal SW2 from the shutter switch, the control unit 102 determines whether or not to emit the flash. Whether or not to emit the flash may be set in advance by the operator using the operation unit 101, and the control unit 102 may determine by reading the setting data, or the control unit 102 may detect the darkness of the surroundings and make an automatic determination.

  As a result of this determination, when performing flash emission, the control unit 102 controls the EF processing unit 113 to cause the flash unit 114 to perform pre-emission, and performs processing such as calculation of the emission amount and weighting of the EF frame. Then, the control unit 102 causes the flash unit 114 to emit light with the main light emission amount calculated by the pre-light emission, and performs image shooting. On the other hand, in the case of non-flash emission, the control unit 102 shifts to the following main photographing process without the above light control.

  In the actual photographing, the control unit 102 performs control so that the format of the digital image signal (image data) output from the image processing unit 111 is converted into a format such as JPEG by the format conversion unit 116 and output to the image recording unit 117. To do. The image recording unit 117 performs a process of recording the format-converted image data in a predetermined memory.

  Next, a night scene discrimination method in scene discrimination will be described. FIG. 2 is a flowchart showing a procedure for determining a night view. This processing program is stored in a recording medium (not shown) in the control unit 102, and is repeatedly executed by the CPU (not shown) in the control unit 102 at predetermined intervals after the power is turned on. Immediately after the power is turned on, the scene is not determined and is in an initial state. In this embodiment, first, it is determined whether or not the scene is a “night scene”. If it is determined that the scene is not a “night scene”, it is subsequently determined whether or not the scene is applicable to another scene.

  First, the control unit 102 acquires motion information of the imaging device (digital camera 10) from the device motion detection unit 108 (step S1). The control unit 102 determines whether or not the digital camera 10 is stopped from the acquired motion information (step S2). When the amount of motion of the imaging device is equal to or less than the set threshold, the control unit 102 determines that the imaging device is stopped.

  On the other hand, when the amount of motion of the imaging device is larger than the set threshold, the control unit 102 determines that the imaging device is moving, and proceeds to the process of step S6. This threshold value is determined by experimentally determining the amount of motion at which the image is not blurred with respect to the standard exposure time set when the night view mode is determined.

  When it is determined in step S2 that the imaging apparatus is stopped, the control unit 102 detects the movement of the subject in the shooting screen (the movement information of the subject in the image) (step S3). In the motion detection of the subject, for example, the screen is divided into a plurality of blocks, changes in luminance and color information for each block are detected, and a motion vector of the subject in the screen is calculated. Note that the processing in step S3 is an example of subject motion information detection means.

  As a result of the subject motion detection, the control unit 102 determines whether or not the subject motion amount is larger than a set value (threshold value), that is, whether or not the subject is moving (step S4). Here, when the amount of movement of the subject is equal to or less than the set value, the control unit 102 determines that the subject is stopped, and proceeds to the process of step S8. On the other hand, if the amount of movement of the subject is larger than the set value, the control unit 102 determines that the subject is moving, and proceeds to the process of step 5. This threshold value is determined by experimentally determining the amount of motion at which the image is not blurred with respect to the standard exposure time set when the night view mode is determined. It is set to a value larger than the threshold value for device motion determination.

  When it is determined that the subject is moving, the control unit 102 determines that the subject is moving although the imaging device is stopped (step S5), and the image may be blurred due to the movement of the imaging device or the subject. Therefore, it is determined that the scene is not a “night scene” (step S6).

  After determining that the scene is not a “night scene” scene, the control unit 102 performs another scene determination process (step S7), and ends the scene determination process. Note that description of other scenes such as “evening scene”, “backlight”, “portrait”, etc. is omitted.

  On the other hand, when it is determined in step S4 that the subject is stopped, the control unit 102 determines that the imaging device is stopped and the subject is stopped (step S8). Furthermore, in step S8, the control unit 102 determines that a condition for photographing a night view can be set. That is, even if the brightness of the subject is equal, it is possible to set shooting conditions that lower the shooting sensitivity for noise reduction and lower the shutter speed and increase the exposure time compared to other scenes. .

  The controller 102 determines whether the scene is a “night scene” from the brightness and color information of the screen (step S9). That is, the control unit 102 calculates the Bv value and the overall luminance in the screen, and determines whether or not these satisfy the night scene determination condition. If it is determined that these satisfy the night scene determination condition, the control unit 102 then moves the screen for night scene determination at a certain ratio in the vertical direction from the top of the screen according to the information from the vertical / horizontal position detection unit 103. Until the night view detection area. Then, the control unit 102 divides this night scene detection area into a plurality of blocks. Subsequently, the control unit 102 acquires luminance information and color information of each block (information acquisition unit).

  As described above, the control unit 102 calculates the Bv value in the screen, the overall luminance, the luminance information in the night scene detection area, and the color information in the night scene detection area. When the block ratio in which the color information and the luminance information in the night scene detection area match those in the night scene matches the predetermined condition for determining a plurality of night scenes, the control unit 102 determines that the scene is “night scene”. "(Step S10). On the other hand, when it is determined that it is not “night scene”, the control unit 102 proceeds to the process of step S6 and performs the above-described process.

  Once the control unit 102 determines that the scene is a night scene, it does not determine that the scene is a night scene due to a slight change in image information. And the block ratio with which brightness | luminance information corresponds is changed (step S11).

  Specifically, the control unit 102 changes the threshold value of the Bv value and the overall luminance in the screen to the bright side, and determines that the scene is a night scene even if the screen becomes a little brighter. Even if the block ratio decreases, it is determined that the scene is a night scene. As described above, once it is determined that the scene is a night scene, the control unit 102 does not easily determine that the scene is not a night scene in the next scene determination.

  Further, the control unit 102 changes the movement condition of the subject (step S12). In step S4, the control unit 102 uses a value (threshold value) in which the amount of motion of the subject is set, that is, the amount of motion at which the image is not blurred, so that it is not determined that the subject is not a night scene due to slight motion of the subject. The value is larger than the threshold value. The control unit 102 may be configured to execute only one of the processes in steps S11 and S12.

  Thereafter, the control unit 102 determines whether or not the signal SW1 is ON, that is, whether or not the notification of the signal SW1 has been received from the shutter switch (step S13). When the notification of the signal SW1 is received from the shutter switch, the control unit 102 proceeds to the process of step S14.

  On the other hand, when the notification of the signal SW1 is not received from the shutter switch, the control unit 102 returns to the process of step S3 and performs the scene determination again. However, even if the scene determination is performed again, the control unit 102 does not return to the process of step S1, but returns to the process of step S3 and restarts from the process of detecting the movement of the subject. This is a feature of this embodiment.

  That is, when the scene determination is performed again in a state where the scene is once determined as the “night scene”, the control unit 102 acquires the movement information of the photographing apparatus during the scene determination while the scene is determined as “night scene”. Without acquiring, only the movement information of the subject is acquired. Once it is determined that the scene is a “night scene”, the subject is expected to have a high probability of satisfying the condition of the “night scene” scene even at the next scene determination timing.

  However, if the movement information of the imaging device is acquired after the “night scene” scene is determined, the user operates the button for setting the exposure correction, forced flash emission, or selecting the AF area, etc. There is a possibility that the imaging apparatus itself moves. If the control unit 102 refers to such movement information of the photographing apparatus, the control unit 102 determines that it is not a “night scene” scene by a user operation.

  Therefore, in this embodiment, when it is determined that the scene is a “night scene”, the control unit 102 does not acquire the motion information of the imaging device unless the scene is subsequently determined to be another scene, and the motion information is the subject. Only the movement information of the camera is acquired and scene discrimination is performed.

  Here, as described above, the threshold value of the motion information of the subject is set to be larger than the threshold value of the motion information of the imaging device. Therefore, the subject moves as long as the imaging device moves slightly by the user's operation. And so that it is not erroneously determined.

  When the scene is not determined to be a “night scene” scene, the control unit 102 may set the threshold value of the motion information of the subject and the threshold value of the motion information of the imaging device to the same value. Further, the control unit 102 determines that the movement of the image caused by the movement of the imaging device caused by the operation of the switch or the button of the operation unit 101 is the movement of the subject only while it is determined as the “night scene” scene. Also good. Further, the control unit 102 may change the threshold value of the motion information of the subject so that the motion of the subject is not determined to be a night view scene only while it is determined to be a “night scene” scene. .

  On the other hand, when the notification of the signal SW1 is received from the shutter switch in step S13, the control unit 102 performs AF and AE processing using the image at this time, and acquires the optimum focus and exposure setting conditions for shooting ( Step S14). Further, since it is determined that the night scene is one in which neither the imaging device nor the subject moves, the control unit 102 sets shooting conditions for night scenes such as shooting conditions that can reduce noise by changing the shooting sensitivity to low sensitivity.

  The control unit 102 determines whether or not the signal SW2 is ON, that is, whether or not the notification of the signal SW2 has been received from the shutter switch (step S15). When the notification of the signal SW2 is not received from the shutter switch, the control unit 102 returns to the process of step S13 before receiving the signal SW1, and repeats the above process.

  On the other hand, when the notification of the signal SW2 is received from the shutter switch, the control unit 102 performs a photographing operation (step S16). After the photographing is performed, the control unit 102 returns to the process of step S3 and detects the movement of the subject.

  As described above, in this embodiment, the method for discriminating the night view has been described. However, the threshold value used for each discrimination condition may be determined according to the situation at the time of shooting.

  Next, an image processing method for determining a night scene will be described. This image processing is performed using the image processing unit 111.

  In the present embodiment, one or more of gamma correction and dark portion correction in the screen are set by determining the night scene. When it is determined that the shooting scene is a “night scene”, in a scene with a low contrast ratio, the contrast can be improved by finely adjusting the gradation by gamma correction. In addition, an effect that can be improved by dark part correction can be expected for a darker area in the screen. By such image processing, it is possible to perform image processing suitable for a night scene at the time of shooting using the imaging device. Note that image processing at the time of shooting is performed according to the type of scene in other scenes such as “evening scene”, “backlight”, and “portrait” as well. For example, in the case of an “evening scene” scene, image processing for enhancing redness is performed.

  As described above, the imaging apparatus according to the present embodiment does not perform long-second exposure when there is a possibility of blurring in the subject, in addition to the luminance information and color information, the motion information of the imaging device and the subject's The motion information is also referred to and it is determined whether or not the shooting scene is a “night view”.

  Then, in order to prevent the “night scene” scene mode from being canceled due to the movement of the imaging apparatus by the user's operation, the imaging apparatus performs motion information of the imaging apparatus while it is determined as the “night scene” scene. Do not refer to. Thereby, the “night scene” scene can be discriminated with higher accuracy than in the past.

  In summary, in the case where the imaging apparatus according to the present embodiment is newly determined to be a scene at the time when it is determined to be a “night scene” scene, the motion information and luminance of the subject are used without using the motion information of the imaging apparatus. Based on the information and the color information, it is determined whether or not the new scene is a specific scene. As a result, the “night scene” scene can be prevented from being canceled due to the movement of the imaging device by the user's operation, and long-time exposure is not performed when there is a possibility that the subject will be blurred. Can be. In this way, the “night scene” scene can be properly determined. Therefore, when the scene to be photographed is a night view, highly accurate scene discrimination and good image photographing can be performed.

  In addition, since the motion information of the subject is acquired after detecting the motion information of the imaging device, it is possible to determine whether the scene is a night scene in an appropriate order. In addition, if it is detected that there is no movement of the subject after it is detected that there is no movement of the imaging device, it is determined as a night scene, so the shooting sensitivity is reduced to reduce the shooting conditions for noise reduction, for example, noise reduction. It is possible to set shooting conditions that reduce the speed.

  In addition, when the luminance information and the color information satisfy predetermined conditions, it is determined that the scene is a night scene, so that the scene can be accurately determined. Also, once a night scene is determined, it can be determined that the scene is not a night scene due to a slight change in image information or a slight movement of the subject. This makes it possible to shoot a stable night scene.

  In addition, in the state where it is determined that the scene is a night scene, the threshold value of the motion information of the subject is set to be larger than the threshold value of the motion information of the imaging device, so even if the imaging device moves slightly due to the user's operation. It is not erroneously determined that the subject is moving.

  Also, since image processing is performed according to the type of scene, if it is determined that the shooting scene is a night scene, in a scene with a low contrast ratio, the gradation can be finely adjusted by gamma correction to adjust the contrast. Can be improved. In addition, an effect that can be improved by dark part correction can be expected for a darker area in the screen. Therefore, it is possible to perform image processing suitable for a night scene at the time of shooting using the imaging device. In this way, night scenes can be determined with high accuracy.

  The present invention is not limited to the configuration of the above-described embodiment, and any configuration can be used as long as the functions shown in the claims or the functions of the configuration of the present embodiment can be achieved. Is also applicable.

  For example, in the above-described embodiment, a compact digital camera has been described as an example, but the present invention can also be applied to a digital video camera, a digital SLR (single-lens reflex camera), and the like.

DESCRIPTION OF SYMBOLS 10 Digital camera 101 Operation part 102 Control part 104 CCD part 108 Device motion detection part 111 Image processing part 112 Scene discrimination | determination part

Claims (6)

An imaging apparatus having an imaging means for acquiring an image,
Device motion information detecting means for detecting motion information of the imaging device;
Subject motion information detection means for detecting motion information of a subject in the image acquired by the imaging means;
Information acquisition means for acquiring luminance information and color information in the image acquired by the imaging means;
Scene discrimination means for repeatedly discriminating a scene from an image acquired by the imaging means,
The scene determination means is detected by the apparatus motion information detection means to be free of movement of the imaging device, the subject movement information detection means is detected to be free of movement of the subject, and the luminance information and color information are When a predetermined condition is satisfied, it is determined to be a night view ,
When the scene is newly determined in the state where it is determined to be the night view , without using the motion information of the imaging device, based on the motion information of the subject, the luminance information, and the color information, Determine whether the new scene is the night view ,
When no is determined the a night scene, if performing the determination of the new scene, the motion information of the previous SL imaging apparatus, the movement information of the object, on the basis of the luminance information and the color information, a new An imaging apparatus for determining whether or not a scene is the night view .   The imaging apparatus according to claim 1, wherein after the apparatus movement information detection unit detects movement information of the imaging apparatus, the subject movement information detection unit detects movement information of the subject. When the scene determination unit newly determines a scene in a state where the scene is determined to be the night view , the conditions of the luminance information and the color information are set so that the determined scene is less likely to be changed once. The imaging apparatus according to claim 1, wherein at least one of the conditions of the movement information of the subject is changed. In a state in which the image is determined to be the night view , the threshold value of the subject motion information detected by the subject motion information detection unit is larger than the threshold value of the motion information of the imaging device detected by the device motion information detection unit. The imaging apparatus according to claim 1, wherein the imaging apparatus is set large.   5. The image pickup apparatus according to claim 1, wherein image processing at the time of shooting is performed in accordance with a type of a scene determined by the scene determination unit. A scene determination method for an imaging apparatus including an imaging means for acquiring an image,
A device motion information detecting step for detecting motion information of the imaging device;
Subject motion information detection step for detecting subject motion information in the image acquired by the imaging means;
An information acquisition step of acquiring luminance information and color information in the image acquired by the imaging means;
A scene discrimination step of repeatedly discriminating the scene from the image acquired by the imaging means,
In the scene determination step, it is detected that there is no movement of the imaging device by the apparatus movement information detection step, it is detected that there is no movement of the subject by the subject movement information detection step, and the luminance information and color information are When a predetermined condition is satisfied, it is determined to be a night view ,
When the scene is newly determined in the state where it is determined to be the night view , without using the motion information of the imaging device, based on the motion information of the subject, the luminance information, and the color information, Determine whether the new scene is the night view ,
When no is determined the a night scene, if performing the determination of the new scene, the motion information of the previous SL imaging apparatus, the movement information of the object, on the basis of the luminance information and the color information, a new A scene discrimination method for an image pickup apparatus, comprising: discriminating whether or not a scene is the night view .

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