KR20110004082A - A digital photographing device and a method for controlling a digital photographing device - Google Patents

Abstract

PURPOSE: A digital photographing device for confirming the shake of an image is provided to easily acquire the desired screen by transferring the shake of the photographed image to a user. CONSTITUTION: A shaking sensing unit(410a) senses the shaking degree of a digital photographing unit(100a). The shaking sensing unit transfers the shaking information to the shaking sensing unit. A shaking correction database stores a shaking correction range. A shaking correction inspection unit(420a) determines the possibility of shaking correction based on the sensed shaking degree.

Description

A digital photographing device and a method for controlling a digital photographing device}

The present invention relates to a digital photographing apparatus having a shake correction function and a digital photographing apparatus control method.

The digital photographing apparatus exposes an imaging device, captures an image generated in the imaging device, and photographs a subject. In order to photograph, an imaging device must be exposed for a predetermined time or more. The exposure time may be adjusted by an exposure setting value such as a shutter speed. Since a certain amount of light is required for shooting, the shutter speed is slower because shooting in a dark environment requires a longer time than when shooting in a bright environment in order to receive a certain amount of light.

Recently, digital photographing apparatuses have a shake correction function. As described above, in order to capture a still image or a moving image using the digital photographing apparatus, the imaging device should be exposed for a predetermined time or more. However, if shaking occurs in the digital photographing apparatus while the image pickup device is exposed for photographing, shaking occurs in the photographed image, thereby degrading the quality of the photographed image. The shake correction function prevents a shake from occurring in the captured image due to the shake of the digital photographing apparatus during shooting.

When a shake occurs in the digital photographing apparatus, the shake correction function compensates the shake by moving the lens or the image pickup device in the opposite direction of the shake to prevent the shake from occurring in the captured image.

The present invention provides a digital photographing apparatus and a digital photographing apparatus control method for determining whether a shake has occurred in a digital photographing apparatus so that a user can easily recognize whether a shake has occurred in a captured image.

In accordance with another aspect of the present invention, a method for controlling a digital photographing apparatus includes: detecting a degree of shaking of the digital photographing apparatus; And determining whether the shake correction is possible based on the shake degree. The determining of whether the shake correction is possible may include: comparing the shake degree with a pre-stored shake correction possible range indicating a range of shake degree that can be shake corrected in the digital photographing apparatus. If it is included in the shake correctable range, it may be determined that shake correction is possible, and if the shake degree of the digital photographing apparatus is not included in the shake correctable range, it may be determined that shake correction is not possible. Preferably, the shake correctable range indicates a shake degree in which shake correction is possible according to an exposure setting value indicating a degree of exposure.

According to the second embodiment of the present invention, the shaking degree is the shaking degree of the digital photographing apparatus during the motion correction while the photographing is performed using the digital photographing apparatus, and the determining of whether the shake correction is possible may include: This can be done after completion. In this case, the shake correction possible range indicates a shake degree in which shake correction is possible according to an exposure setting value indicating a degree of exposure, and determining whether the shake correction is possible is based on an exposure setting value when the digital photographing apparatus photographs. When the shake degree of the digital photographing apparatus is included within the shake correctable range, it is determined that the shake correction is possible by comparing the shake correction possible range with the corresponding shake correction possible range, and the shake degree of the digital photographing apparatus is the shake correction. If it is not included in the possible range, it may be determined that the shake correction is not possible.

In addition, the method for controlling the digital photographing apparatus according to the first or second embodiment of the present invention may further include providing a message that the shake correction is not possible if it is determined that the shake correction is not possible.

According to a first aspect of the present invention, there is provided a digital photographing apparatus comprising: a shake detecting unit configured to detect a degree of shaking of the digital photographing apparatus; And a shake correction inspection unit determining whether or not shake correction is possible based on the shake degree. The digital photographing apparatus may further include a shake correction database that stores a shake correctable range indicating a range of shake degree capable of shaking correction in the digital photographing apparatus, wherein the shake correction inspector is configured to detect shaking of the digital photographing apparatus. If it is included in the shake correctable range, it may be determined that the shake correction is possible, and if the shake of the digital photographing apparatus is not included in the shake correctable range, it may be determined that the shake correction is not possible. Preferably, the shake correctable range indicates a shake degree in which shake correction is possible according to an exposure setting value indicating a degree of exposure.

According to the second embodiment of the present invention, the shaking degree is a shaking degree of the digital photographing apparatus during motion correction while photographing using the digital photographing apparatus, and the shake correction inspector shakes after the photographing is completed. Determine whether correction is possible. In addition, the shake correction possible range indicates a shake degree in which shake correction is possible according to an exposure setting value indicating an exposure degree, and the shake correction inspection unit includes the shake correction corresponding to an exposure setting value when the digital photographing apparatus is photographed. By comparing a possible range with the shake degree, if the shake degree of the digital photographing apparatus is included within the shake correctable range, it is determined that the shake correction is possible, and the shake degree of the digital photographing apparatus is not included in the shake correction possible range. If it is not, it can be determined that the shake correction is not possible.

The digital photographing apparatus according to the first or second embodiment of the present invention may further include a notification unit that provides a message that the shake correction is not possible when the shake correction inspection unit determines that the shake correction is not possible. .

In addition, the shake detection unit may be a gyro sensor, and the digital photographing apparatus according to the present invention may further include a shake correction unit that performs shake correction based on the shake degree.

The present invention has an effect that can inform the user immediately after shooting whether or not the shaking occurs in the captured image. By immediately knowing whether or not a shake occurred in the captured image after shooting, the user does not need to repeatedly record the same scene due to the fear of shaking, and prevents a problem in that the captured photo is shaken to obtain a clear picture of the desired scene. Can be.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. The following description and the annexed drawings are for understanding the operation according to the present invention, and a part that can be easily implemented by those skilled in the art may be omitted.

In addition, the specification and drawings are not provided to limit the invention, the scope of the invention should be defined by the claims. Terms used in the present specification should be interpreted as meanings and concepts corresponding to the technical spirit of the present invention so as to best express the present invention.

Embodiments of the present invention will now be described with reference to the accompanying drawings.

1 is a diagram illustrating an exemplary structure of a digital photographing apparatus capable of implementing a digital photographing apparatus and a digital photographing apparatus control method according to the present invention.

The digital photographing apparatus 100 that can implement the present invention includes an optical unit 110, an optical driver 111, an imaging device 115, an imaging device controller 116, an operation unit 120, a program storage unit 130, The buffer storage unit 140, the data storage unit 150, the display unit 160, and the digital signal processing unit DSP may be included.

The optical unit 110 provides an optical signal input from a subject to the imaging device 115. The optical unit 110 may include at least one lens, such as a zoom lens for controlling the angle of view to be narrowed or widened according to a focal length, and a focus lens for focusing a subject. In addition, the optical unit 110 may further include an aperture for adjusting the amount of light.

The optical driver 111 adjusts the position of the lens, opening and closing of the iris, and the like. You can focus by shifting the position of the lens. In addition, the amount of light may be adjusted by adjusting the opening and closing of the iris. The optical driver 111 may control the optical unit 110 according to a control signal automatically generated by an image signal input in real time or a control signal manually input by a user's manipulation.

The optical signal transmitted through the optical unit 110 reaches the light receiving surface of the imaging device 115 to form an image of a subject. The imaging device 115 may use a Charge Coupled Device (CCD) or a Complementary Metal Oxide Semiconductor Image Sensor (CIS) that converts an optical signal into an electrical signal. Such an image pickup device 115 may be controlled by the image pickup device control unit 116 sensitivity and the like. The imaging device controller 116 may control the imaging device 115 according to a control signal automatically generated by an image signal input in real time or a control signal manually input by a user's operation.

The operation unit 120 is a place that can input a control signal from the outside such as a user. The operation unit 120 exposes the image pickup device 115 to light for a predetermined time and releases a shutter-release button for inputting a shutter-release signal for taking a picture, a power button for supplying power, and an angle of view according to the input. There are a wide-angle zoom button and a tele-zoom button to widen or narrow the angle of view, and various function buttons such as selecting a text input or shooting mode, a playback mode, selecting a white balance setting function, and selecting an exposure setting function. The operation unit 120 may have various types of buttons as described above, but is not limited thereto, and may be implemented in any form that a user can input, such as a keyboard, a touch pad, a touch screen, a remote controller, and the like.

In addition, the digital photographing apparatus 100 may include a program storage unit 130 for storing a program such as an operating system or an application system for driving the digital camera, and a buffer storage unit for temporarily storing data or result data necessary for performing an operation. 140, a data storage unit 150 storing various information required for the program, including an image file including an image signal.

In addition, the digital photographing apparatus 100 includes a display unit 160 to display an operation state thereof or image information photographed by the digital photographing apparatus 100. The display unit 160 may provide visual information and / or audio information to a user. In order to provide visual information, the display unit 160 may include, for example, a liquid crystal display panel (LCD), an organic light emitting display panel (OLED), an electrophoretic display panel (EDD), and the like.

In addition, the digital photographing apparatus 100 includes a digital signal processor 170 for processing an input image signal and controlling each component in accordance with this or an external input signal.

According to the present invention, when a user photographs a still image or a moving image using a digital photographing apparatus, it is determined whether the shake correction is possible based on the degree of shaking of the digital photographing apparatus. As described above, the shake correction function provided in the digital photographing apparatus obtains information on the shaking using a gyro sensor or the like to determine whether the digital photographing apparatus is shaken, and moves the lens or image pickup device in the opposite direction to shake the shake. To compensate. However, if the shake is excessive, the shake of the digital photographing apparatus is not compensated even when the shake correction function is used, and thus the shake occurs in the captured image.

The longer the exposure time, the higher the likelihood that the digital photographing apparatus will shake during shooting and the greater the degree of shaking. Therefore, the slower the shutter speed, the more likely shake will occur in the captured image. Therefore, the slower the shutter speed, the smaller the amount of shake that can be compensated using the shake correction function.

Accordingly, the present invention determines whether the current shake degree can be compensated using the shake correction function based on the shake degree of the digital photographing apparatus. At this time, the present invention determines whether the shake correction is possible in consideration of the exposure setting value at the time of shooting.

In this specification, the exposure setting value is a value indicating the degree to which the imaging device 115 of the digital photographing apparatus is exposed, for example, a shutter speed.

2 is a flowchart illustrating a method for controlling a digital photographing apparatus according to a first embodiment of the present invention.

The digital photographing apparatus control method according to the first embodiment of the present invention detects the degree of shaking of the digital photographing apparatus (S202). The degree of shaking can be detected using various sensors for detecting the movement, for example, the degree of shaking can be detected using a gyro sensor. The degree of shaking may be expressed by, for example, a vector value representing the magnitude and direction of the shaking.

Next, the method for controlling the digital photographing apparatus determines whether the shaking degree is within a range that can be corrected using the shake correction function in the digital photographing apparatus (S204). The shake correction function used in the digital photographing apparatus generally cannot compensate for infinite shake, and shake correction is possible only when the shake is within a certain range. Therefore, the method for controlling the digital photographing apparatus according to the first embodiment of the present invention is provided with a shake correctable range indicating a range of shake that can be corrected by the shake correction function used in the digital photographing apparatus, and the shake of the digital photographing apparatus in advance. It is determined whether the shake correction is possible by determining whether the degree is included in the shake correction possible range.

If the shake amount is not within the shake correctable range, the digital photographing apparatus control method according to the first embodiment of the present invention determines that shake correction is not possible and provides a message that shake correction is not possible. S206). The message that the shake correction is not possible is displayed through the display unit 160 or transmitted as a sound through a speaker (not shown). As another example, when the shake correction is not possible, the method of controlling the digital photographing apparatus may inform that the shake correction is not possible using the LED indicator light provided in the digital photographing apparatus.

When the shake amount is within the shake correctable range, the digital photographing apparatus control method according to the first embodiment of the present invention determines that shake shake is possible, and ends without providing a message on whether shake shake is possible to the user. Can be. However, when it is determined that the shake correction is possible, an embodiment for providing a message indicating that the shake correction is possible is also included in the scope of the present invention.

The digital photographing apparatus control method according to the first embodiment of the present invention may be performed before photographing as an example. The method for controlling the digital photographing apparatus may continuously detect the degree of shake before shooting, determine whether the shake correction is possible at the current shake degree, and provide the user with information on whether the shake correction is possible. For example, when the half-shutter function is activated, an exposure setting value such as a shutter speed may be determined, and thus, the method for controlling the digital photographing apparatus determines whether the shake correction for the current live view input is possible in consideration of the exposure setting value. Information on this may be provided to the user in a live view state. An embodiment considering the exposure setting value will be described in more detail with reference to FIG. 3 in the second embodiment of the present invention.

The digital photographing apparatus control method according to the first embodiment of the present invention may be performed after the photographing is completed in the digital photographing apparatus as another example. In this example, the method for controlling the digital photographing apparatus may determine whether the shake correction is possible in consideration of the degree of shaking at the time of shooting, and provide the information to the user immediately after the shooting.

3 is a flowchart illustrating a method for controlling a digital photographing apparatus according to a second embodiment of the present invention.

In the method of controlling the digital photographing apparatus according to the second embodiment of the present invention, when the user photographs using the digital photographing apparatus, it is determined whether the shake correction is possible in consideration of the exposure setting value of the digital photographing apparatus. Further, according to the second embodiment of the present invention, the shake correction possible range is determined according to the exposure set value.

In the method of controlling the digital photographing apparatus according to the second embodiment of the present invention, the shaking degree of the digital photographing apparatus is detected at the time of photographing (S302).

Next, the digital photographing apparatus control method searches for a shake correction range corresponding to the exposure setting value at the time of photographing (S304). According to the second embodiment of the present invention, the shake correction possible range is determined differently according to the exposure setting value. For example, the shake correctable range may be predetermined as shown in FIG. 6.

6 illustrates an example in which a shake correction possible range is determined according to a shutter speed which is an example of an exposure setting value. The slower the shutter speed is, the longer the exposure time of the imaging device is. Therefore, the longer the shutter speed is, the smaller the blurring correctable range will be. FIG. 6 illustrates an exemplary shake correctable range, and the shake correctable range according to the present invention is not limited by the data shown in FIG. 6.

Therefore, according to the second embodiment of the present invention, when shooting is performed by using the digital photographing apparatus, the method for controlling the digital photographing apparatus measures the shake correction possible range corresponding to the exposure setting value at the time of shooting, for example, the shutter speed. Search from pre-stored shake correctable ranges as shown in FIG.

Next, in the method of controlling the digital photographing apparatus according to the second embodiment of the present invention, it is determined whether the shaking degree at the time of shooting is included in the shake correctable range corresponding to the exposure setting value at the time of shooting (S306). By such an operation, the method for controlling the digital photographing apparatus may determine whether the shaking degree at the time of photographing is capable of shaking correction in consideration of the exposure setting value at the time of photographing.

When the degree of shaking at the time of photographing is not included in the range of possible shaking correction corresponding to the exposure setting value at the time of photographing, the digital photographing apparatus control method according to the second embodiment of the present invention determines that the shake correction is not possible. Thus, a message that shake correction is not possible is provided (S308).

When the shaking degree at the time of photographing is included in the shake correctable range corresponding to the exposure setting value at the time of photographing, the digital photographing apparatus control method according to the second embodiment of the present invention determines that the shake correction is possible. In this case, the method for controlling the digital photographing apparatus may terminate without providing a message regarding whether the shake correction is possible or may provide a message that the shake correction is possible.

4 is a diagram showing the structure of a digital photographing apparatus according to a first embodiment of the present invention.

The digital photographing apparatus 100a according to the first embodiment of the present invention includes a shake detection unit 410a, a shake correction inspection unit 420a, and a shake correction database 430a. The digital photographing apparatus 100a according to the first embodiment of the present invention detects the degree of shaking of the digital photographing apparatus 100a and determines whether the shake correction is possible.

The shake detection unit 410a detects a shake degree of the digital photographing apparatus 100a and provides a shake degree to the shake correction inspection unit. The shake detection unit 410a may output, for example, a vector value indicating the magnitude and direction of the shake. The degree of shaking can be detected using various sensors for detecting the movement, for example, the degree of shaking can be detected using a gyro sensor.

The shake correction database 430a stores a shake correctable range indicating a shake degree in which the shake can be corrected in the digital photographing apparatus 100a. The shake correction database 430a may be implemented using the program storage unit 130 or the data storage unit 150 described with reference to FIG. 1. Preferably, the shake correction database may be implemented using a nonvolatile storage medium.

The shake correction inspection unit 420a determines whether shake correction is possible based on the shake degree detected by the shake detection unit 410a. To this end, the shake correction inspection unit 420a searches the shake correctable range from the shake correction database 430a to determine whether the shake is included in the shake correctable range, and determines whether the shake correction is possible. The shake correction inspection unit 420a determines that the shake correction is possible when the shake amount is included in the shake correctable range, and determines that shake correction is not possible when the shake degree is not included in the shake correctable range. can do. The shake correction inspection unit 420a uses a program storage unit 130 including computer codes programmed to perform the operation of the shake correction inspection unit 420a described above, and a digital signal processor 170 capable of executing such codes. Can be implemented. As another example, the shake correction inspection unit 420a may be implemented in hardware.

5 is a diagram showing the structure of a digital photographing apparatus according to a second embodiment of the present invention.

The digital photographing apparatus 100b according to the second embodiment of the present invention is a shake detection unit 410b, shake correction inspection unit 420b, shake correction database 430b, shake correction unit 510, and notification unit 520 It may include. The digital photographing apparatus 100b according to the second exemplary embodiment of the present invention detects the degree of shaking during the shooting and determines whether the shake correction is possible in consideration of the exposure setting value when the digital shooting apparatus 100b is photographed.

The shake detection unit 410b detects a shake degree during shooting. The degree of shaking at the time of photographing means the degree of shaking when the user captures an image captured by the imaging device by pressing the shutter button. The degree of shaking can be detected using various sensors for detecting the movement, for example, the degree of shaking can be detected using a gyro sensor.

The shake correction database 430b stores a shake correction possible range at each exposure setting value. For example, the shake correction possible range may be stored in the shake correction database 430b according to the shutter speed as shown in FIG. 6. The shake compensation database 430a may be implemented using the program storage 130 or the data storage 150 described with reference to FIG. 1. Preferably, the shake correction database may be implemented using a nonvolatile storage medium.

When the shake detection unit 420b outputs a shake level during shooting from the shake detection unit 410b, the shake correction inspection unit 420b retrieves a shake correction possible range corresponding to the exposure setting value at the time of shooting from the shake correction database 430b. It is determined whether is included in the shake correction possible range. The shake correction inspection unit 420b determines that the shake correction is possible when the shake amount is included in the shake correctable range, and determines that shake correction is not possible when the shake degree is not included in the shake correctable range. can do. The shake correction inspection unit 420b uses a program storage unit 130 including computer codes programmed to perform the operation of the shake correction inspection unit 420b described above, and a digital signal processor 170 capable of executing such codes. Can be implemented. As another example, the shake correction inspection unit 420b may be implemented in hardware.

The shake correction unit 510 compensates for the shake based on the shake information detected by the shake detection unit 410b, thereby preventing the shake from occurring in the captured image. The shake correction unit 510 may compensate for the shake by moving the lens or the image pickup device in the opposite direction of the shake, for example, based on the shake information.

The notification unit 520 provides information on whether the shake correction determined by the shake correction inspection unit 420b is possible. According to an embodiment, the notification unit 520 may provide a message indicating that the shake correction is possible when the shake correction is possible, and provide a message indicating that the shake correction is impossible when the shake correction is impossible. According to another embodiment, the notification unit 520 may provide a message that the shake correction is impossible only when the shake correction is impossible, and may not provide any message when the shake correction is possible.

The notification unit 520 may be implemented in any form as long as it can provide information on whether the shake correction is possible to the user. For example, the notification unit 520 may display a message or a symbol indicating that the shake correction is impossible through the display unit 160. As another example, the notification unit 520 may provide a guide message or a warning sound indicating that the shake correction is impossible through the speaker (not shown). As another example, when the shake correction is not possible, the shake correction may be notified using the LED indicator light provided in the digital photographing apparatus 100b.

The present invention has been described above with reference to preferred embodiments. Those skilled in the art will understand that the present invention can be embodied in a modified form without departing from the essential characteristics of the present invention. Therefore, the above-described embodiments should be considered in an illustrative rather than a restrictive sense. The scope of the present invention is defined by the appended claims rather than by the foregoing description, and the inventions claimed by the claims and the inventions equivalent to the claimed invention are to be construed as being included in the present invention.

1 is a diagram illustrating an exemplary structure of a digital photographing apparatus capable of implementing a digital photographing apparatus and a digital photographing apparatus control method according to the present invention.

2 is a flowchart illustrating a method for controlling a digital photographing apparatus according to a first embodiment of the present invention.

3 is a flowchart illustrating a method for controlling a digital photographing apparatus according to a second embodiment of the present invention.

4 is a diagram showing the structure of a digital photographing apparatus according to a first embodiment of the present invention.

5 is a diagram showing the structure of a digital photographing apparatus according to a second embodiment of the present invention.

6 illustrates an example in which a shake correction possible range is determined according to a shutter speed which is an example of an exposure setting value.

Claims (14)

In the digital photographing device control method, Detecting a degree of shaking of the digital photographing apparatus; And And determining whether shaking correction is possible based on the shaking degree. The method of claim 1, The determining of whether the shake correction is possible may include: comparing the shake degree with a pre-stored shake correction possible range indicating a range of shake degree that can be shake corrected in the digital photographing apparatus. And if it is included in the shake correctable range, determine that shake correction is possible, and determine that shake correction is not possible if the shake degree of the digital photographing apparatus is not included in the shake correctable range. The method of claim 2, The shake correction possible range is a digital photographing apparatus control method, showing a shake degree capable of shake correction in accordance with an exposure setting value indicating a degree of exposure. The method of claim 1, The shaking degree is a shaking degree of the digital photographing apparatus during motion correction while photographing using the digital photographing apparatus, The determining of whether or not the shake correction is possible is performed after the shooting is completed, the digital photographing apparatus control method. The method of claim 4, wherein The shake correction possible range indicates a shake degree in which shake correction is possible according to an exposure setting value indicating a degree of exposure, The determining of whether the shake correction is possible may include comparing the shake correction possible range corresponding to the exposure setting value when the digital photographing apparatus is photographed with the shake degree, so that the shake degree of the digital photographing apparatus is the shake correction. If it is included in the possible range, it is determined that the shake correction is possible, and if the shake degree of the digital photographing apparatus is not included in the shake correction possible range, it is determined that shake correction is not possible. 6. The method according to any one of claims 1 to 5, And if it is determined that the shake correction is not possible, providing a message indicating that the shake correction is not possible. In the digital photographing apparatus, A shake detection unit for detecting a shake degree of the digital photographing apparatus; And And a shake correction inspection unit that determines whether shake correction is possible based on the shake degree. The method of claim 7, wherein The digital photographing apparatus further includes a shake correction database that stores a shake correctable range indicating a range of shake degree in which the shake correction is possible in the digital photographing apparatus. The shake correction inspection unit determines that shake correction is possible when the shake of the digital photographing apparatus is included in the shake correctable range, and shake correction is not possible when the shake of the digital photographing apparatus is not included in the shake correctable range. Judging by the digital photographing device. The method of claim 8, The shake correction possible range is a digital photographing apparatus, which represents a shake degree capable of shake correction according to an exposure setting value indicating a degree of exposure. The method of claim 7, wherein The shaking degree is a shaking degree of the digital photographing apparatus during motion correction while photographing using the digital photographing apparatus, The shake correction inspection unit determines whether shake correction is possible after shooting is completed. The method of claim 10, The shake correction possible range indicates a shake degree in which shake correction is possible according to an exposure setting value indicating a degree of exposure, The shake correction inspection unit compares the shake correctable range corresponding to the exposure setting value when the digital photographing apparatus is photographed with the shake degree, and shakes when the shake degree of the digital photographing apparatus is included within the shake correctable range. And determine that the correction is possible, and determine that the shake correction is not possible if the shaking degree of the digital photographing apparatus is not included in the shake correction possible range. The method according to any one of claims 7 to 11, If it is determined that the shake correction is not possible in the shake correction inspection unit, further comprising a notification unit for providing a message that shake correction is not possible, the digital photographing apparatus. The method according to any one of claims 7 to 11, The shake detection unit is a gyro sensor, the digital photographing apparatus. The method according to any one of claims 7 to 11, And a shake correction unit configured to perform shake correction based on the shake degree.

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