JP2010016601A - Photographing device and playback device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To appropriately generate an image even when a user performs a zooming mistake operation. <P>SOLUTION: The photographing device includes a photographing optical part 12 for generating image data, an optical zoom processing part 11 for changing optical zoom magnification, an optical zoom magnification change condition storing part 17 for storing a zoom magnification change condition, a photographed image temporary storing part 14 for storing image data for a prescribed detection time, a digital zoom processing part 15 for expanding or reducing an image, an optical zoom magnification storing part 21 for storing optical zoom magnification for a prescribed detection time, an optical zoom magnification change determination circuit 23a for determining whether a change in optical zoom magnification coincides with the zoom magnification change condition, and a digital zoom magnification calculating part 22 for calculating digital zoom magnification so as to slowly transit a changing state of expansion or reduction of a correction image to be recorded in an image recording part 16 when coinciding with the zoom magnification change condition. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a photographing apparatus and a reproducing apparatus that correct a zoom magnification with respect to an image photographed by an erroneous operation of a zoom function by a user among images photographed using a zoom function by optical or digital processing.

  In general, a photographing apparatus with a zoom function having an optical zoom function and a digital zoom function is widespread.

  This general photographing apparatus with a zoom function magnifies an image when photographing a distant subject based on an operation of designating an optical zoom magnification or a digital zoom magnification by a user. When shooting, reduce the image.

  As described above, since a general photographing device with a zoom function shoots an enlarged image based on an operation by the user, there is a case where an unsightly image is taken due to an erroneous operation by the user. For example, the user mistakenly increases the zoom magnification too much and the subject image protrudes outside the range of the shooting screen, and the user may hurry to perform an erroneous operation to decrease the zoom magnification. Further, the user may stop the operation before the zoom magnification reaches the desired zoom magnification, and may perform an erroneous operation to increase or decrease the zoom magnification again.

  When such an erroneous operation is taken, images taken with frequent zoom magnification and images taken with intermittent zoom magnification are very unsightly for the user. It was.

  Patent Document 1 proposes a camera zoom lens automatic zooming device that measures the distance to a subject with a point and automatically drives the zoom to the closest point.

  Japanese Patent Application Laid-Open No. 2004-228561 describes an image pickup screen based on detection results of a camera shake amount detection unit that detects a camera shake amount, a zoom position detection unit that detects a position of a zoom lens, and a camera shake amount detection unit and a zoom position detection unit. Means for continuously changing the size and position to cut out the image, and image output means for cutting out and outputting the imaged screen on the imaged surface, and cutting out the imaged screen according to the on / off of the camera shake correction switch. An imaging apparatus that gradually changes the size has been proposed.

Specifically, in the imaging device described in Patent Document 2, the margin area generation circuit determines the size of the margin area on the imaging screen, determines the size to be cut out, and the signal processing control circuit determines the size of the captured image of the imaging element. A cut-out position and size are determined, and based on this, a captured image is cut out by a signal processing circuit and an output image is output. Then, when the camera shake correction switch is switched from on to off, the size of the margin area generation circuit and the signal processing control circuit is gradually cut out in several stages by the control of the microcomputer, etc., and the signal processing circuit is increased. To output the output image.
JP-A-1-232315 JP-A-7-203279

  However, the technique described in Patent Document 1 is based on the premise that the subject is captured in the shooting screen and no object other than the subject exists in the shooting screen. If an object enters, normal operation cannot be expected.

  In the technique described in Patent Document 2, when the camera shake correction switch is switched from on to off, the size is gradually cut out in several stages by the margin area generation circuit and the signal processing control circuit under the control of a microcomputer or the like. Since the output image is output by the signal processing circuit, the user may frequently shoot with the zoom magnification frequently raised or lowered, or when the user may shoot with the zoom magnification raised or lowered intermittently. When the zooming operation was performed, the captured image was very unsightly for the user.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a photographing apparatus and a reproducing apparatus that generate an appropriate image even when a user performs a zoom mistake operation.

  In order to achieve the above object, a first feature of the imaging apparatus according to the present invention is that the imaging optical means (12) for photoelectrically converting incident imaging light by an imaging element to generate image data and the generated imaging device. An image display means (13) for displaying an image based on image data, and an optical for changing the optical zoom magnification of imaging light to be incident on the imaging optical means (12) based on an operation signal supplied from the outside. A zoom processing means (11), an optical zoom magnification change condition storage means (17) for storing a change characteristic of the optical zoom magnification by the optical zoom processing means (11) as a zoom magnification change condition, and the photographing optical means ( The captured image temporary storage means (14) for storing the image data for a predetermined detection time generated in step 12) and the image data stored in the captured image temporary storage means (14). Digital zoom processing means (15) for enlarging or reducing the image obtained by digital processing, and image recording means (16) for recording image data of the corrected image enlarged or reduced by the digital zoom processing means (15) And an optical zoom magnification storage means (21) for storing the optical zoom magnification for the predetermined detection time in association with the image data for the predetermined detection time stored in the captured image temporary storage means (14). And an optical zoom magnification change for determining whether or not the change in the optical zoom magnification stored in the optical zoom magnification storage means (21) matches the zoom magnification change condition stored in the optical zoom magnification change condition storage means. It is determined by the determining means (23a) and the optical zoom magnification change determining means (23a) that the zoom magnification changing condition is met. In addition, the digital zoom processing means (15) sets a digital zoom magnification for enlarging or reducing the image so that the change state of enlargement or reduction of the corrected image in the predetermined detection time gradually changes. Digital zoom magnification calculating means (22) for calculating.

 In order to achieve the above object, a second feature of the photographing apparatus according to the present invention is further provided with a detection time calculating means (23b) for calculating the detection time according to a change speed of the optical zoom magnification, and the photographed image. The temporary storage means (14) stores the image data generated by the photographing optical means (12) for the calculated detection time, and the optical zoom magnification storage means (21) stores the calculated detection time. And the digital zoom magnification calculating means (22) stores the optical zoom magnification of the minute in association with the image data stored in the captured image temporary storage means (14) for the calculated detection time. When it is determined by the zoom magnification change determining means that the zoom magnification change condition is met, the change state of enlargement or reduction of the corrected image in the calculated detection time is moderated. To transition to, in that the digital zoom processing unit is adapted to calculate the digital zoom magnification for enlarging or reducing the image.

 In order to achieve the above object, a third feature of the photographing apparatus according to the present invention is that a photographing optical means (32) for photoelectrically converting incident imaging light by an imaging element to generate image data, and the photographing optical means. First digital zoom processing means (35a) for enlarging or reducing the image data generated in (32) at a first digital zoom magnification by digital processing based on an operation signal supplied from outside; An image display means (33) for displaying an image enlarged or reduced by one digital zoom processing means (35a), and a digital zoom magnification for storing a change characteristic of the first digital zoom magnification as a zoom magnification change condition A change condition storage means (37) and a predetermined detection time enlarged or reduced by the first digital zoom processing means (35a). A captured image temporary storage means (14) for storing image data, and an image obtained based on the image data stored in the captured image temporary storage means (14) is enlarged or enlarged at a second digital zoom magnification by digital processing. A second digital zoom processing means (35b) for reducing, an image recording means (36) for recording image data of a corrected image enlarged or reduced by the second digital zoom processing means (35b), and the predetermined First digital zoom magnification storage means (41) for storing the first digital zoom magnification for the detection time in association with the image data for the predetermined detection time stored in the captured image temporary storage means (14). ) And a change in the first digital zoom magnification stored in the first digital zoom magnification storage means (41) Digital zoom magnification change determination means (43a) for determining whether or not the zoom magnification change condition stored in the zoom magnification change condition storage means (37) coincides with the zoom magnification change condition determination means (43a). When it is determined that the change condition is satisfied, the second digital zoom processing means (35b) causes the image to be changed so that the change state of enlargement or reduction of the corrected image in the predetermined detection time gradually changes. And a second digital zoom magnification calculating means (42) for calculating a second digital zoom magnification for enlarging or reducing the zoom ratio.

 In order to achieve the above object, a fourth feature of the photographing apparatus according to the present invention is further provided with a detection time calculation means (23b) for calculating the detection time according to a change speed of the first digital zoom magnification. The captured image temporary storage means (14) stores the image data enlarged or reduced by the first digital zoom processing means (35a) for the calculated detection time, and stores the first digital zoom magnification. The means (41) stores the first digital zoom magnification for the calculated detection time in association with the image data stored in the captured image temporary storage means (14) for the calculated detection time. Then, the second digital zoom magnification calculation means (42) is determined by the digital zoom magnification change determination means (43a) to match the zoom magnification change condition. A second digital zoom processing means for enlarging or reducing the image so that the change state of the enlargement or reduction of the corrected image in the calculated detection time gradually changes. The digital zoom magnification is calculated.

 In order to achieve the above object, the first feature of the playback device according to the present invention is that image data captured by the imaging device (5, 6) having a zoom function is associated with the zoom magnification at the time of shooting. When the supplied zoom image data is supplied from the outside, the playback device reproduces the image data based on the supplied zoom image data, and the zoom image data includes the image data and the zoom magnification. Extraction means (51) for extracting the image, temporary image storage means (54) for storing image data for a predetermined detection time extracted by the extraction means (51), and characteristics of the change in the zoom magnification. A zoom magnification change condition storage means (57) that is stored as a magnification change condition and an image obtained based on the image data stored in the image temporary storage means (54) are displayed. Digital zoom processing means (55) for generating digital corrected image data by enlarging or reducing by the tall processing, and image display for displaying a display image based on the digital image data generated by the digital zoom processing means (55) The zoom magnification for the predetermined detection time extracted by the means (53) and the extraction means (51) is converted into the image data for the predetermined detection time stored in the image temporary storage means (54). The zoom magnification storage means (61) stored in association with the zoom magnification change stored in the zoom magnification storage means (61) matches the zoom magnification change condition stored in the zoom magnification change condition storage means. Zoom magnification change determining means (63a) for determining whether or not the zoom magnification change is caused by the zoom magnification change determining means (63a). The digital zoom processing means so that the change state of the enlargement or reduction of the display image for the predetermined detection time displayed on the image display means (53) is gradually transitioned when it is determined that they match (55) comprises digital zoom magnification calculating means (62) for calculating a digital zoom magnification for enlarging or reducing the image.

 In order to achieve the above object, a second feature of the reproducing apparatus according to the present invention is that the zoom image data further includes a change rate of the zoom magnification, and the extracting means (51) The image temporary storage means (54) further comprises detection time calculation means (63b) for extracting image data, the zoom magnification, and the change speed, and calculating the detection time according to the extracted change speed. The image data extracted by the extraction means (51) for the calculated detection time is stored, and the zoom magnification storage means (61) is stored by the extraction means (51) for the calculated detection time. The extracted zoom magnification is stored in association with the image data stored in the image temporary storage means (54) for the calculated detection time, and the digital zoom magnification calculation means 62) When the zoom magnification change determining means (63a) determines that the zoom magnification change condition is satisfied, the display image is enlarged or reduced for the calculated detection time displayed on the image display means. The digital zoom processing means calculates a digital zoom magnification for enlarging or reducing the image so that the change state gradually changes.

  According to the photographing apparatus and the reproducing apparatus of the present invention, it is possible to generate an appropriate image even when the user performs a zoom mistake operation.

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

 For example, when the user performs an operation to intermittently increase the optical zoom magnification, or when the user performs an operation to raise or lower the optical zoom magnification within a short period of time, the user operates the optical zoom magnification incorrectly. Can be guessed.

  Therefore, in the first embodiment of the present invention, a change in the optical zoom magnification due to the user's operation is detected, and the transition of the change state of the enlargement or reduction of the image becomes gentle according to the change in the optical zoom magnification. An imaging apparatus that calculates the digital zoom magnification will be described as an example.

<Configuration of photographing apparatus>
FIG. 1 is a configuration diagram illustrating a configuration of a photographing apparatus that is Embodiment 1 of the present invention.

  An imaging apparatus 1 that is Embodiment 1 of the present invention includes an optical zoom processing unit 11, a shooting optical unit 12, an image display unit 13, a captured image temporary storage unit 14, a digital zoom processing unit 15, and an image recording unit. 16, a ROM 17, a RAM 18, a zoom magnification input unit 19, an operation unit 20, an optical zoom magnification storage unit 21, a digital zoom magnification calculation unit 22, and a control unit 23.

  The optical zoom processing unit 11 changes the optical zoom magnification of the imaging light incident on the photographing optical unit 12 based on the control signal supplied from the control unit 23.

  The imaging optical unit 12 generates image data by photoelectrically converting imaging light incident from the optical zoom processing unit 11 using an imaging element.

  The image display unit 13 includes an image output unit such as an organic EL (electroluminescence) display or a liquid crystal display, and displays a display image based on image data supplied from the imaging optical unit 12 according to a control signal from the control unit 23. indicate. Further, the image display unit 13 displays a display image based on the digitally corrected image data read from the image recording unit 16.

  The captured image temporary storage unit 14 stores image data for a predetermined detection time generated by the imaging optical unit 12. Here, the detection time is a predetermined time and needs to be set in advance by a provider or a user.

  The digital zoom processing unit 15 digitally calculates an image for a predetermined detection time obtained based on the image data stored in the captured image temporary storage unit 14 by a digital zoom magnification calculation unit 22 of the control unit 23 described later. Enlarge or reduce at zoom magnification.

  FIG. 2 is a diagram for explaining digital processing by the digital zoom processing unit 15, FIG. 2A shows a captured image, and FIGS. 2B and 2C show the digital processing by the digital zoom processing unit 15. The display image in which the captured image is enlarged is shown.

  As shown in FIG. 2A, the digital zoom processing unit 15 applies the digital zoom magnification calculation unit 22 to the digital image calculated from the captured image 101 obtained from the image data stored in the captured image temporary storage unit 14. An area to be cut out in the captured image 101 is determined based on the zoom magnification. Then, the digital zoom processing unit 15 performs a trimming process on the photographed image in the determined region, that is, the region of the photographed image 101a illustrated in FIG. 2A, so that the cropped photographed image 101a has the same size as the photographed image 101. The display image 102 shown in FIG. 2B is generated.

  Further, similarly, the digital zoom processing unit 15 cuts out a portion of the photographed image 101b indicated by a broken line from the photographed image 101, enlarges the cut photographed image 101b to the same size as the photographed image 101, and FIG. A display image 103 shown in 2 (c) is generated.

  In this way, the digital zoom processing unit 15 enlarges the captured image 101 based on the digital zoom magnification supplied from the control unit 23.

  The image recording unit 16 includes, for example, a hard disk drive or an optical disk drive, and records the image data of the corrected image enlarged or reduced by the digital zoom processing unit 15 as digital corrected image data in accordance with a control signal from the control unit 23.

  The ROM 17 stores the change characteristic of the optical zoom magnification by the optical zoom processing unit 11 as a zoom magnification change condition.

  FIG. 3 is a diagram showing an example of zoom magnification change conditions stored in the ROM 17.

  As shown in FIG. 3, the zoom magnification change condition is stored in association with the state number 201 of the optical zoom magnification change, the change state 202 of the optical zoom magnification, and the determination condition 203.

  The RAM 18 is composed of a volatile semiconductor element or the like and stores various data supplied from the control unit 23 in addition to storing the digital zoom magnification calculated by the digital zoom magnification calculation unit 22 described later.

  The zoom magnification input unit 19 includes a zoom magnification operation button, and generates a zoom magnification that the optical zoom processing unit 11 changes based on an operation of the zoom magnification operation button by the user.

  The operation unit 20 includes various operation buttons and the like, and generates various operation signals based on operations of the various operation buttons and the like by the user.

  The optical zoom magnification storage unit 21 stores the optical zoom magnification for a predetermined time supplied from the zoom magnification input unit 19 in association with the image data for a predetermined time stored in the captured image temporary storage unit 14.

  When it is determined that the change in the optical zoom magnification stored in the optical zoom magnification storage unit 21 matches the zoom magnification change condition stored in the ROM 17 (to be described later), the digital zoom magnification calculation unit 22 stores in the image recording unit 16. The digital zoom processing unit 15 calculates a digital zoom magnification for enlarging or reducing the image so that the state of the change in enlargement or reduction of the recorded correction image gradually changes.

  The control unit 23 performs central control of the photographing apparatus 1. Specifically, basic functions such as shooting and image display are controlled based on the operation signal supplied from the operation unit 20.

  Moreover, the control part 23 is provided with the optical zoom magnification change determination circuit 23a on the function.

  The zoom magnification change determination circuit 23 a determines whether or not the change in the optical zoom magnification stored in the optical zoom magnification storage unit 21 matches the zoom magnification change condition stored in the ROM 17.

<Operation of the photographing apparatus 1>
Next, the operation of the photographing apparatus 1 that is Embodiment 1 of the present invention will be described.

  The photographing apparatus 1 according to the first embodiment of the present invention mainly performs an optical zoom magnification storage process, an optical zoom magnification change determination process, and an optical zoom magnification correction process. Therefore, each process will be described in detail below.

<< Optical zoom magnification storage process >>
FIG. 4 is a diagram for explaining the optical zoom magnification storage process and the optical zoom magnification change determination process of the photographing apparatus 1 that is Embodiment 1 of the present invention.

  As shown in FIG. 4, when the photographing apparatus 1 is turned on by a user operation at time t <b> 1, based on an operation signal for requesting a change in the optical zoom magnification supplied from the zoom magnification input unit 19 after time t <b> 1. Then, the optical zoom processing unit 11 changes the optical zoom magnification as indicated by the optical zoom magnification 401.

  Specifically, from time t1 to time t3, the optical zoom processing unit 11 increases the optical zoom magnification from 1 time (a1) to 8 times (a2), and from time t3 to time t4, the optical zoom magnification is increased. The zoom magnification is maintained at 8 times (a2 to a3), and the optical zoom magnification is again increased from 8 times (a3) to 11 times (a4) from time t4 to time t5. Here, it is assumed that the optical zoom magnification at power-on is set to 1 as an initial value.

  Then, the imaging optical unit 12 photoelectrically converts the imaging light that is incident at the optical zoom magnification set by the optical zoom processing unit 11 by an imaging element provided therein to generate image data, and the generated detection time The image data for PT is stored in the captured image temporary storage unit 14. Specifically, the imaging optical unit 12 continues to store the image data in the captured image temporary storage unit 14, and when the image data stored in the captured image temporary storage unit 14 reaches the detection time PT, the control unit 23 The image data is supplied to the digital zoom processing unit 15 in order from the oldest generated date and time, and is deleted from the captured image temporary storage unit 14. Then, the control unit 23 stores the newly generated image data in the captured image temporary storage unit 14.

  Note that if the detection time PT is too long or too short, appropriate determination cannot be made in the optical zoom magnification change determination process described later, so it is necessary for a provider, a user, or the like to set an appropriate value in advance. There is.

  At this time, the control unit 23 stores the optical zoom magnification in the optical zoom magnification storage unit 21 in synchronization with the image data stored in the captured image temporary storage unit 14. Specifically, as shown in FIG. 4, the optical zoom magnification 402 corresponding to the detection time PT is associated with the image data 403 stored in the captured image temporary storage unit 14 and stored in the optical zoom magnification storage unit 21. Then, when the optical zoom magnification stored in the optical zoom magnification storage unit 21 reaches the detection time PT, the control unit 23 deletes the optical zoom magnification in order from the oldest generated date and time, and the newly generated optical The zoom magnification is memorized.

<< Optical zoom magnification change determination process >>
Next, the optical zoom magnification change determination process of the photographing apparatus 1 that is Embodiment 1 of the present invention will be described with reference to FIG. In the optical zoom magnification change determination process, after the optical zoom magnification stored in the optical zoom magnification storage unit 21 reaches the detection time PT, a newly generated optical zoom magnification is stored in the optical zoom magnification storage unit 21. It is executed every time.

  The optical zoom magnification change determination circuit 23a of the control unit 23 uses the optical zoom magnification corresponding to the detection time PT stored in the optical zoom magnification storage unit 21 to change the optical zoom magnification, that is, the number of states of the optical zoom magnification change, the optical zoom. The change state of the magnification and the period length of each change state are extracted.

  The number of states of optical zoom magnification change refers to the number of periods in which the rate of change of optical zoom magnification is constant, and the state of change of optical zoom magnification refers to the period in which the rate of change of optical zoom magnification is constant. A symbol that indicates whether the optical zoom magnification is increasing (zoom-up), constant (no zoom change), or decreasing (zoom-down). The period length of the change state is the optical zoom It means the length of the period in which the rate of change of magnification is constant.

  In the example shown in FIG. 4, the optical zoom magnification change determination circuit 23a determines the number of states of the optical zoom magnification change at the detection time PT as a state between a1 and a2 (first state 411) and a state between a2 and a3. It is extracted as “3” in (second state 412) and a state between a3 and a4 (third state 413).

  Further, the optical zoom magnification change determination circuit 23a sets the optical zoom magnification change state in the first state 411 to “zoom up” and the optical zoom magnification change state in the second state 412 as the optical zoom magnification change state. “No change” and the change state of the optical zoom magnification in the third state 413 are extracted as “zoom up”.

  Furthermore, the optical zoom magnification change determination circuit 23a sets the period length of the first state 411 to “ST1”, the second state 412 to “ST2”, and the third state 413 as the change state period length. The period length is extracted as “ST3”.

  Next, the optical zoom magnification change determination circuit 23a determines the zoom magnification change condition stored in the ROM 17, that is, the extracted number of states of the optical zoom magnification change, the change state of the optical zoom magnification, and the period length of each change state. It is determined whether or not the zoom magnification change condition shown in FIG.

  In the example shown in FIG. 4, the number of states of the optical zoom magnification change is “3”, and the state of change of the optical zoom magnification is “zoom up”, “no change”, “zoom up”. The zoom magnification change condition 302 is extracted as the zoom magnification change condition to be performed. Then, the optical zoom magnification change determination circuit 23a extracts the conditional expressions “ST2 ≦ e12” and “ST3 ≧ e13” of the state period length 203 from the zoom magnification change condition 302, and the period lengths ST2 and ST3 are extracted. It is determined whether the conditional expression is satisfied.

  Here, e12 is set in advance by e13.

  When ST2 is sufficiently short, it can be estimated that the user has performed an operation to change the optical zoom magnification by recognizing that an erroneous operation has been performed, and therefore, a predetermined e12 is provided as an upper limit value. Further, when ST3 is sufficiently long, it can be estimated that the user has reached a desired optical zoom magnification, and therefore, predetermined e13 is provided as the lower limit value.

  If it is determined that this conditional expression is satisfied, the optical zoom magnification change determination circuit 23 a determines that the change in the optical zoom magnification at the detection time PT matches the zoom magnification change condition stored in the ROM 17.

<< Optical zoom magnification correction process >>
FIG. 5 is a diagram for explaining the optical zoom magnification correction processing by the digital zoom magnification calculator 22 of the photographing apparatus 1 that is Embodiment 1 of the present invention.

  As shown in FIG. 5, when the optical zoom magnification change determination circuit 23a determines that the change in the optical zoom magnification at the detection time PT matches the zoom magnification change condition, the digital zoom magnification calculation unit 22 The correction zoom magnification 404 is calculated so that the transition of the change state of enlargement or reduction of the correction image recorded in FIG.

  Specifically, the digital zoom magnification calculation unit 22 calculates a straight line connecting the optical zoom magnification (a2) at the time point t3 and the optical zoom magnification (a4) at the time point t5 as the corrected zoom magnification 404.

  Next, the digital zoom magnification calculation unit 22 calculates a digital zoom magnification for the digital zoom processing unit 15 to enlarge or reduce the image based on the calculated corrected zoom magnification 404. Specifically, the digital zoom magnification during the period when the corrected zoom magnification 404 is calculated, that is, from the time point t3 to the time point t5 is calculated using the following Equation 1.

DZ = RZ / OZ (Formula 1)
Here, DZ is a digital zoom magnification, RZ is a corrected zoom magnification, and OZ is an optical zoom magnification.

  The digital zoom magnification calculation unit 22 stores the digital zoom magnification 405 calculated in this way in the RAM 18 in synchronization with the image data stored in the captured image temporary storage unit 14.

  Next, the digital zoom processing unit 15 generates digital corrected image data by enlarging or reducing the image data stored in the captured image temporary storage unit 14 based on the digital zoom magnification stored in the RAM 18. The digitally corrected image data thus recorded is recorded in the image recording unit 16.

  As described above, according to the imaging apparatus 1 that is Embodiment 1 of the present invention, when it is determined that the change in the optical zoom magnification stored in the optical zoom magnification storage unit 21 matches the zoom magnification change condition, Since the digital zoom magnification is calculated so that the transition of the change state of enlargement or reduction of the correction image recorded in the recording unit 16 becomes gradual, an appropriate image can be generated even when the user performs a zoom error operation. can do.

  In addition, in the photographing apparatus 1 which is Embodiment 1 of the present invention, a straight line connecting the optical zoom magnification (a2) at the time t3 and the optical zoom magnification (a4) at the time t5 is calculated as the corrected zoom magnification 404. Not limited to.

  For example, a straight line connecting the start point and end point of the optical zoom magnification during the detection time PT may be calculated as the corrected zoom magnification.

  FIG. 6 is a diagram for explaining optical zoom magnification correction processing by the digital zoom magnification calculator 22 when calculating a straight line connecting the start point and end point of the optical zoom magnification during the detection time PT as the corrected zoom magnification. In this case, since the correction zoom magnification may be smaller than the optical zoom magnification, it is necessary to set the digital zoom magnification at the time of power-on to a magnification larger than 1 as an initial value. Set as double. When the digital zoom magnification is set as “2” times as an initial value, the size of the image displayed on the image display unit 13 and the size of the image recorded on the image recording unit 16 are matched. The photographing optical unit 12 displays the initial value of the magnification of the image displayed on the image display unit 12 as “2” times.

  As shown in FIG. 6, when the optical zoom magnification change determination circuit 23a determines that the change in the optical zoom magnification at the detection time PT matches the zoom magnification change condition, the digital zoom magnification calculation unit 22 The correction zoom magnification 406 is calculated so that the transition of the change state of the correction image recorded in 16 is enlarged or reduced.

  Specifically, the digital zoom magnification calculator 22 calculates a straight line connecting the optical zoom magnification (a1) at time t2 and the optical zoom magnification (a4) at time t5 as the corrected zoom magnification 406.

  Next, the digital zoom magnification calculator 22 calculates a digital zoom magnification for the digital zoom processor 15 to enlarge or reduce the image based on the calculated corrected zoom magnification 406. Specifically, the digital zoom magnification DZ for the period during which the corrected zoom magnification 406 is calculated, that is, from the time t2 to the time t5 is calculated using the above-described equation 1.

  The digital zoom magnification calculation unit 22 stores the digital zoom magnification 407 calculated in this way in the RAM 18 in synchronization with the image data stored in the captured image temporary storage unit 14.

  As described above, when the straight line connecting the optical zoom magnifications at both ends of the detection time PT is calculated as the corrected zoom magnification, the transition of the change state of the corrected image enlarged or reduced recorded in the image recording unit 16 becomes more gradual. Since the digital zoom magnification is calculated, a more appropriate image can be generated even when the user performs a zoom mistake operation.

  In Embodiment 1 of the present invention, the change in the optical zoom magnification at the predetermined detection time PT is extracted, and the digital zoom magnification is calculated based on the extracted change in the optical zoom magnification. However, the detection time PT is fixed. Instead of the value, it may be changed according to the speed of the set optical zoom magnification.

  FIG. 7A illustrates the relationship between the detection time and the optical zoom speed when the optical zoom speed is low, and FIG. 7B illustrates the detection time and the optical zoom speed when the optical zoom speed is high. It is a figure explaining the relationship.

 As shown in FIG. 7A, when the optical zoom speed is slow, a change in the optical zoom magnification 501 at the detection time PT is extracted, and a corrected zoom magnification 502 is calculated based on the extracted change in the optical zoom magnification. By doing so, it is possible to generate a good image in which the transition of the change state of enlargement or reduction of the corrected image becomes gentle.

 On the other hand, as shown in FIG. 7B, when the optical zoom speed is high, the correction zoom at the second detection time PT2 that is longer than the first detection time PT1 than the correction zoom magnification 504 at the first detection time PT1. A magnification of 505 can generate a good image in which the transition of the change state of the correction image enlargement or reduction becomes more gradual.

 Therefore, in the second embodiment of the present invention, the detection time is calculated according to the speed of the optical zoom magnification, the change in the optical zoom magnification during the calculated detection time is extracted, and the change in the extracted optical zoom magnification is taken into account. Based on this, a photographing apparatus for calculating the digital zoom magnification will be described.

<Configuration of photographing apparatus>
FIG. 8 is a configuration diagram illustrating a configuration of an imaging apparatus that is Embodiment 2 of the present invention.

  An imaging apparatus 2 that is Embodiment 2 of the present invention includes an optical zoom processing unit 11, a shooting optical unit 12, an image display unit 13, a captured image temporary storage unit 14, a digital zoom processing unit 15, and an image recording unit. 16, a ROM 17, a RAM 18, a zoom magnification input unit 19, an operation unit 20, an optical zoom magnification storage unit 21, a digital zoom magnification calculation unit 22, and a control unit 23.

  Here, among the configurations included in the photographing apparatus 2 that is Embodiment 2 of the present invention, the optical zoom processing unit 11, the photographing optical unit 12, the image display unit 13, the photographed image temporary storage unit 14, and the digital zoom process. The embodiment 15, the image recording unit 16, the ROM 17, the RAM 18, the zoom magnification input unit 19, the operation unit 20, the optical zoom magnification storage unit 21, and the digital zoom magnification calculation unit 22 are the embodiments of the present invention. 1 is the same as the configuration provided with the same reference numeral provided in the photographing apparatus 1, and thus the description thereof is omitted.

  The control unit 23 performs central control of the imaging device 2. Specifically, basic functions such as shooting and image display are controlled based on the operation signal supplied from the operation unit 20.

  Further, the control unit 23 sets the optical zoom speed based on the operation signal supplied from the operation unit 20, and the optical zoom magnification at the set optical zoom speed based on the operation signal from the zoom magnification input unit 19. The optical zoom processing unit 11 is instructed to change.

  Further, the control unit 23 includes an optical zoom magnification change determination circuit 23a and a detection time calculation circuit 23b in terms of its functions.

  The optical zoom magnification change determination circuit 23 a determines whether or not the change in the optical zoom magnification stored in the optical zoom magnification storage unit 21 matches the zoom magnification change condition stored in the ROM 17.

  The detection time calculation circuit 23b calculates the detection time PT according to the change speed of the optical zoom magnification.

<Operation of the photographing device>
Next, the operation of the photographing apparatus 2 that is Embodiment 2 of the present invention will be described.

  The imaging apparatus 2 that is Embodiment 2 of the present invention mainly performs an optical zoom magnification change determination process, an optical zoom magnification correction process, and a detection time calculation process. Among these, the optical zoom magnification change determination process and the optical zoom magnification correction process are the same as the optical zoom magnification change determination process and the optical zoom magnification correction process in the photographing apparatus 1 according to the first embodiment of the present invention. Is omitted.

≪Detection time calculation process≫
FIG. 9 is a diagram showing the relationship between the optical zoom speed and the detection time.

  As shown in FIG. 9, in the photographing apparatus 2 that is Embodiment 2 of the present invention, the detection time is proportional to the optical zoom speed from the predetermined minimum zoom speed to the maximum zoom speed.

  Therefore, the detection time calculation circuit 23b of the control unit 23 of the photographing apparatus 2 that is Embodiment 2 of the present invention uses the relationship between the optical zoom speed and the detection time shown in FIG. A corresponding detection time is calculated, and the calculated detection time is supplied to the optical zoom magnification change determination circuit 23a.

  Thereby, according to the imaging device 2 that is Embodiment 2 of the present invention, the detection time is calculated according to the set optical zoom speed, and the change in the optical zoom magnification at the calculated detection time is extracted. Since the corrected zoom magnification is calculated based on the extracted change in the optical zoom magnification, even when the optical zoom speed is high, a good image is generated in which the transition of the change state of the enlarged or reduced correction image becomes more gradual can do.

 In Embodiment 1 of the present invention, a change in the optical zoom magnification due to a user's operation is detected, and the digital image is changed so that the transition of the change state of the enlargement or reduction of the corrected image becomes gentle according to the change in the optical zoom magnification. The photographing apparatus 1 that calculates the zoom magnification has been described as an example.

 In the third embodiment of the present invention, a change in the first digital zoom magnification due to a user's operation is detected, and the change state of the correction image enlargement or reduction changes according to the change in the first digital zoom magnification. A description will be given by taking as an example a photographing apparatus that calculates the second digital zoom magnification so as to be gentle.

<Configuration of photographing apparatus>
FIG. 10 is a configuration diagram illustrating a configuration of an imaging apparatus that is Embodiment 3 of the present invention.

  The photographing apparatus 3 according to the third embodiment of the present invention includes a photographing optical unit 32, an image display unit 33, a photographed image temporary storage unit 14, a digital zoom processing unit 35, an image recording unit 36, a ROM 37, and a RAM 38. A zoom magnification input unit 39, an operation unit 20, a first digital zoom magnification storage unit 41, a second digital zoom magnification calculation unit 42, and a control unit 43.

  Here, among the configurations included in the imaging device 3 that is Embodiment 3 of the present invention, the captured image temporary storage unit 14 and the operation unit 20 have the same reference numerals respectively provided in the imaging device 1 that is Embodiment 1 of the present invention. Since this is the same as the configuration marked with, the description is omitted.

  The photographing optical unit 32 generates image data by photoelectrically converting incident imaging light using an imaging element, and supplies the generated image data to the digital zoom processing unit 35.

  The image display unit 33 includes image output means such as an organic EL (electroluminescence) display or a liquid crystal display, and the image data supplied from the digital zoom processing unit 35 or the image recording unit 36 in accordance with a control signal from the control unit 43. The image is displayed based on the digitally corrected image data read out from.

  The digital zoom processing unit 35 includes a first digital zoom processing circuit 35a and a second digital zoom processing circuit 35b in terms of its functions.

  The first digital zoom processing circuit 35a enlarges or reduces the image data generated by the photographing optical unit 32 at a first digital zoom magnification by digital processing based on the operation signal supplied from the zoom magnification input unit 39. Let

  The second digital zoom processing circuit 35b enlarges or reduces the image data for the detection time PT stored in the captured image temporary storage unit 14 by the second digital zoom magnification by digital processing.

  The image recording unit 36 includes, for example, a hard disk drive or an optical disk drive, and records the image data of the corrected image enlarged or reduced by the second digital zoom processing unit 35b as digital corrected image data in accordance with a control signal from the control unit 43. To do.

  The ROM 37 stores a change characteristic of the first digital zoom magnification by the first digital zoom processing circuit 35a as a zoom magnification change condition.

  The details are the same as the zoom magnification change condition stored in the ROM 17 of the image capturing apparatus 1 that is Embodiment 1 of the present invention shown in FIG.

  The RAM 38 is composed of a volatile semiconductor element or the like, and stores various data supplied from the control unit 43.

  The zoom magnification input unit 39 includes a zoom magnification operation button, and generates a digital zoom magnification to be changed by the first digital zoom processing circuit 35a based on the operation of the zoom magnification operation button by the user.

  The first digital zoom magnification storage unit 41 stores the first digital zoom magnification for the predetermined detection time PT in association with the image data for the predetermined detection time PT stored in the captured image temporary storage unit 14. .

  The second digital zoom magnification calculation unit 42 changes the state of enlargement or reduction of the correction image recorded in the image recording unit 36 when it is determined by the digital zoom magnification change determination circuit 43a described later that the zoom magnification change condition is met. The second digital zoom processing circuit 35b calculates a second digital zoom magnification for enlarging or reducing the image so that the image transitions gradually.

  The control unit 43 performs central control of the photographing apparatus 3. Specifically, basic functions such as shooting and image display are controlled based on the operation signal supplied from the operation unit 20.

  The control unit 43 also includes a digital zoom magnification change determination circuit 43a in terms of its function.

  The digital zoom magnification change determination circuit 43 a determines whether or not the change in the first digital zoom magnification stored in the first digital zoom magnification storage unit 41 matches the zoom magnification change condition stored in the ROM 37. .

<Operation of the photographing apparatus 3>
Next, the operation of the photographing apparatus 3 that is Embodiment 3 of the present invention will be described.

  The photographing apparatus 3 according to the third embodiment of the present invention mainly performs a first digital zoom magnification storage process, a digital zoom magnification change determination process, and a digital zoom magnification correction process. Therefore, each process will be described in detail below.

<< First digital zoom magnification storage process >>
FIG. 11 is a diagram for explaining the first digital zoom magnification storing process and the digital zoom magnification change determining process by the photographing apparatus 3 according to the third embodiment of the present invention.

  As shown in FIG. 11, when the photographing apparatus 3 is turned on by a user's operation at time t1, the photographing optical unit 32 performs photoelectric conversion by an image pickup device that internally includes incident imaging light after time t1. Then, image data is generated, and the generated image data is supplied to the first digital zoom processing circuit 35a.

  The first digital zoom processing circuit 35a to which the image data is supplied from the photographing optical unit 32 is based on an operation signal for requesting the change of the first digital zoom magnification supplied from the zoom magnification input unit 39 after time t1. The digital zoom magnification is changed as indicated by the first digital zoom magnification 701.

  Specifically, from the time point t1 to the time point t4, the first digital zoom processing circuit 35a increases the first digital zoom magnification from 4 times (a1) to 10 times (a2), and from the time point t4 to t5. Until the time point, the first digital zoom magnification is maintained at 10 times (a2 to a3), and from the time point t5 to the time point t6, the first digital zoom magnification is 10 times (a3) to 8 times ( The first digital zoom magnification is maintained at 8 times (a4 to a5) from time t6 to time t7.

  Here, it is assumed that the first digital zoom magnification at power-on is set to 4 times as an initial value.

  Then, the first digital zoom processing circuit 35a causes the captured image temporary storage unit 14 to store the image data enlarged or reduced at the first digital zoom magnification corresponding to the detection time PT. Specifically, the first digital zoom processing circuit 35 a continues to store the image data enlarged or reduced at the first digital zoom magnification in the captured image temporary storage unit 14 and is stored in the captured image temporary storage unit 14. When the detected image data reaches the detection time PT, the control unit 43 supplies the image data to the second digital zoom processing circuit 35b in order from the oldest generated date and time, and deletes it from the captured image temporary storage unit 14. To do. Then, the control unit 43 stores the newly generated image data in the captured image temporary storage unit 14.

  Note that if the detection time PT is too long or too short, appropriate determination cannot be made in the digital zoom magnification change determination process described later, and therefore it is necessary for the provider or the user to set an appropriate value in advance. There is.

  Then, the control unit 43 causes the first digital zoom magnification storage unit 41 to store the first digital zoom magnification in synchronization with the image data stored in the captured image temporary storage unit 14. Specifically, as shown in FIG. 11, the first digital zoom magnification 702 corresponding to the detection time PT is synchronized with the image data 703 stored in the captured image temporary storage unit 14, and the first digital zoom magnification 702 is synchronized. The data is stored in the storage unit 41. At this time, when the first digital zoom magnification stored in the first digital zoom magnification storage unit 41 reaches the detection time PT, the control unit 43 sequentially generates the first digital zoom from the oldest date and time. The magnification is deleted and the newly generated first digital zoom magnification is stored.

<< Digital zoom magnification change determination process >>
Next, the digital zoom magnification change determination process of the photographing apparatus 3 that is Embodiment 3 of the present invention will be described with reference to FIG. In the digital zoom magnification change determination process, after the first digital zoom magnification stored in the first digital zoom magnification storage unit 41 reaches the detection time PT, the newly generated first digital zoom magnification is Each time it is stored in the first digital zoom magnification storage unit 41, it is executed.

  The digital zoom magnification change determination circuit 43a of the control unit 43 changes the first digital zoom magnification at the predetermined detection time PT stored in the first digital zoom magnification storage unit 41, that is, the first digital zoom magnification change. The number of states, the change state of the first digital zoom magnification, and the period length of each change state are extracted.

  Here, the first digital zoom magnification change state number refers to the number of periods in which the first digital zoom magnification change rate is constant, and the first digital zoom magnification change state refers to the first digital zoom magnification change state. Whether the first digital zoom magnification is increasing (zoom-up), constant (no zooming change), or decreasing (zoom-down) during a period when the change rate of the digital zoom magnification of 1 is constant The period length of the change state means the length of the period in which the rate of change of the first digital zoom magnification is constant.

  In the example shown in FIG. 11, the digital zoom magnification change determination circuit 43a determines the number of states of the first digital zoom magnification change at the detection time PT as a state between a1 and a2 (first state 711), a2 through a3. It is extracted as “4” of the state between the state (second state 712), the state between a3 and a4 (third state 713), and the state between a4 and a5 (fourth state 714).

  Further, the digital zoom magnification change determination circuit 43a sets the change state of the first digital zoom magnification in the first state 711 to “zoom up” and the second state 712 as the first digital zoom magnification change state. The change state of the digital zoom magnification of 1 is “no change”, the change state of the first digital zoom magnification in the third state 713 is “zoom down”, and the change state of the first digital zoom magnification in the fourth state 714 Are extracted as “no change”.

  Further, the digital zoom magnification change determination circuit 43a sets the period length of the first state 711 as “ST1”, the second state 712 as “ST2”, and the third state 713 as the change state period length. The period length is extracted as “ST3”, and the period length of the fourth state 714 is extracted as “ST4”.

  Next, the digital zoom magnification change determination circuit 43a is configured to store the number of extracted first digital zoom magnification change states, the first digital zoom magnification change state, and the period length of each change state stored in the ROM 37. It is determined whether or not the magnification change condition, that is, the zoom magnification change condition shown in FIG.

  In the example shown in FIG. 11, the number of states of the first digital zoom magnification change is “4”, and the change state of the first digital zoom magnification is “zoom up”, “no change”, “zoom down”, Since “no change”, the zoom magnification change condition 303 is extracted as the zoom magnification change condition that coincides with this. Then, the digital zoom magnification change determination circuit 43a extracts the conditional expressions “ST2 ≦ e22”, “ST3 ≦ e23”, and “ST4 ≧ e24” of the state determination condition 203 from the zoom magnification change condition 303, and the period length It is determined whether ST2, ST3, and ST4 satisfy the extracted conditional expression.

  Here, e22 is set in advance by e23 and e24 by a provider or the like.

  If ST2 and ST3 are sufficiently short, it can be assumed that the user has performed an operation to change the digital zoom magnification by recognizing that an erroneous operation has been performed, and therefore predetermined e22 and e23 are provided as upper limit values. In addition, when ST4 is sufficiently long, it can be estimated that the user has reached the desired digital zoom magnification, so the predetermined e24 is provided as the lower limit value.

  If it is determined that this conditional expression is satisfied, the digital zoom magnification change determination circuit 43a determines that the change in the first digital zoom magnification at the detection time PT matches the zoom magnification change condition stored in the ROM 37. .

≪Digital zoom magnification correction processing≫
FIG. 12 is a diagram for explaining digital zoom magnification correction processing by the second digital zoom magnification calculator 42 of the photographing apparatus 3 that is Embodiment 3 of the present invention.

  As shown in FIG. 12, the second digital zoom magnification calculator 42 determines that the change in the first digital zoom magnification at the detection time PT matches the zoom magnification change condition by the digital zoom magnification change determination circuit 43a. In this case, the correction zoom magnification 704 is calculated so that the transition of the change state of the enlargement or reduction of the correction image recorded in the image recording unit 36 becomes gentle.

  Specifically, the second digital zoom magnification calculation unit 42 extends the first digital zoom magnification (a4) at the time point t6 to the first digital zoom magnification (a1) at the time point t3, and the optical at the time point t3. A straight line connecting the zoom magnification (a1) and the optical zoom magnification (a4) at time t6 is calculated as the corrected zoom magnification 704.

  Next, the second digital zoom magnification calculator 42 calculates the second digital zoom magnification based on the calculated corrected zoom magnification 704.

  Specifically, the second digital zoom magnification during the period when the corrected zoom magnification 704 is calculated, that is, from the time t3 to the time t6, is calculated using the following formula 2.

DZ2 = RZ / DZ1 (Formula 2)
Here, DZ2 is the second digital zoom magnification, RZ is the corrected zoom magnification, and DZ1 is the first digital zoom magnification.

  Then, the second digital zoom magnification calculation unit 42 causes the RAM 38 to store the second digital zoom magnification 705 thus calculated in synchronization with the image data stored in the captured image temporary storage unit 14.

  Next, the second digital zoom processing unit 35b enlarges or reduces the image data stored in the captured image temporary storage unit 14 based on the second digital zoom magnification stored in the RAM 38, thereby correcting the digital corrected image data. And the generated digital corrected image data is recorded in the image recording unit 36.

  As described above, according to the photographing apparatus 3 that is Embodiment 3 of the present invention, it is determined that the change in the first digital zoom magnification stored in the first digital zoom magnification storage unit 41 matches the zoom magnification change condition. In such a case, the second digital zoom magnification is calculated so that the transition of the change state of the enlarged or reduced correction image recorded in the image recording unit 36 becomes gentle. Even in this case, an appropriate image can be generated.

  In the third embodiment of the present invention, the change in the first digital zoom magnification at the predetermined detection time PT is extracted, and the second digital zoom magnification is calculated based on the extracted change in the first digital zoom magnification. Although calculated, the detection time PT may not be a fixed value, but may change according to the set speed of the first digital zoom magnification.

 In Embodiment 1 of the present invention, a change in the optical zoom magnification due to a user's operation is detected, and a change state of enlargement or reduction of the correction image recorded in the image recording unit 16 is detected according to the change in the optical zoom magnification. The imaging apparatus 1 that calculates the digital zoom magnification so that the transition is gentle has been described as an example.

 In Embodiment 4 of the present invention, an imaging device with an optical zoom function having an optical zoom function, an imaging device with a digital zoom function having a digital zoom function, and a recording device with an optical zoom function or having a digital zoom function Based on the image data recorded by the photographing device, the zoom magnification, and the zoom speed, a change in the zoom magnification is detected, and the change in the change state of the display image enlargement or reduction is moderated according to the change in the zoom magnification. An imaging system provided with a playback device that calculates the digital zoom magnification will be described as an example.

<Configuration of shooting system>
FIG. 13 is a configuration diagram illustrating a configuration of an imaging system that is Embodiment 4 of the present invention.

  As shown in FIG. 13, a photographing system 10 that is Embodiment 4 of the present invention includes a photographing device 5 with an optical zoom function, a photographing device 6 with a digital zoom function, and a playback device 4.

  The photographing device 5 with an optical zoom function has an optical zoom function, and optically enlarges or reduces an image in accordance with a user's operation. The enlarged or reduced image data, zoom magnification, and zoom speed Is recorded on the optical disc 7.

  The imaging device 6 with a digital zoom function has a digital zoom function, and enlarges or reduces an image taken according to a user's operation by digital processing. The enlarged or reduced image data, zoom magnification, and zoom The speed is recorded on the optical disc 7.

  When the playback device 4 is supplied with the image data, zoom magnification, and zoom speed recorded by the imaging device 5 with an optical zoom function or recorded by the imaging device 6 with a digital zoom function via the optical disc 7, Based on the supplied image data, zoom magnification, and zoom speed, a change in zoom magnification is detected, and the change in the state of enlargement or reduction of the display image is changed gradually according to the change in zoom magnification. Calculate the zoom magnification.

  The storage medium for supplying the image data, the zoom magnification, and the zoom speed from the imaging device 5 with the optical zoom function or the imaging device 6 with the digital zoom function is not limited to the optical disk 7. For example, image data, zoom magnification, and zoom speed may be supplied to the playback device 4 using a hard disk or magnetic tape.

<Configuration of photographing apparatus 5 with optical zoom function>
FIG. 14 is a configuration diagram illustrating a configuration of the imaging device 5 with an optical zoom function provided in the imaging system 10 that is Embodiment 4 of the present invention.

  The photographing apparatus 5 with an optical zoom function includes an optical zoom processing unit 11, a photographing optical unit 24, an image display unit 13, an image recording unit 25, a ROM 26, a RAM 27, a zoom magnification input unit 19, and an operation unit 20. And a control unit 28.

  Here, among the configurations of the photographing apparatus 5 with an optical zoom function provided in the photographing system 10 that is Embodiment 4 of the present invention, the optical zoom processing unit 11, the image display unit 13, the zoom magnification input unit 19, and the like. Since the operation unit 20 has the same configuration as that of the imaging apparatus 1 according to the first embodiment of the present invention, the description thereof will be omitted.

  The imaging optical unit 24 generates image data by photoelectrically converting the imaging light incident from the optical zoom processing unit 11 using an imaging element, and causes the image display unit 13 to display an image based on the generated image data. At the same time, the generated image data is associated with the zoom magnification and the zoom speed supplied from the control unit 28 and is recorded in the image recording unit 25 as zoom image data.

  FIG. 15 is a diagram illustrating an example of zoom image data recorded in the image recording unit 25.

  As shown in FIG. 15, the zoom image data 801 is divided into a user data area 802 and an image data area 803.

  Image data is recorded in the image data area 803.

  In the user data area 802, a zoom magnification and a zoom speed are recorded in association with the image data recorded in the image data area 803.

  The image recording unit 25 includes an optical disk drive, and records zoom image data supplied from the imaging optical unit 24 in accordance with a control signal from the control unit 28.

  The ROM 26 stores a control program and the like for operating the photographing device 5 with an optical zoom function.

  The RAM 27 is composed of a volatile semiconductor element and stores various data supplied from the control unit 28.

  The control unit 28 performs central control of the photographing apparatus 5 with an optical zoom function. Specifically, basic functions such as shooting and image display are controlled based on the operation signal supplied from the operation unit 20.

<Configuration of photographing apparatus 6 with digital zoom function>
FIG. 16 is a configuration diagram illustrating a configuration of the imaging device 6 with a digital zoom function provided in the imaging system 10 that is Embodiment 4 of the present invention.

  The photographing apparatus 6 with a digital zoom function includes a photographing optical unit 32, a digital zoom processing unit 44, an image display unit 33, an image recording unit 45, a ROM 46, a RAM 47, a zoom magnification input unit 39, and an operation unit 20. And a control unit 48.

  Here, among the configurations included in the imaging device 6 with a digital zoom function provided in the imaging system 10 that is Embodiment 4 of the present invention, the imaging optical unit 32, the image display unit 33, the zoom magnification input unit 39, The operation unit 20 is the same as the configuration provided with the same reference numerals provided in the imaging device 3 that is Embodiment 3 of the present invention, and thus the description thereof is omitted.

  The digital zoom processing unit 44 enlarges or reduces the image data supplied from the photographing optical unit 32 with the zoom magnification supplied from the control unit 48, and based on the enlarged or reduced image data, the image is processed. While being displayed on the image display unit 33, the zoom magnification and zoom speed supplied from the control unit 28 are associated with the enlarged or reduced image data, and are recorded in the image recording unit 45 as zoom image data.

  The zoom image data is the same as the zoom image data shown in FIG.

  The image recording unit 45 includes an optical disk drive, and records zoom image data supplied from the digital zoom processing unit 44 in accordance with a control signal from the control unit 48.

  The ROM 46 stores a control program and the like for operating the photographing device 6 with a digital zoom function.

  The RAM 47 is composed of a volatile semiconductor element and stores various data supplied from the control unit 48.

  The control unit 48 performs central control of the photographing apparatus 6 with a digital zoom function. Specifically, basic functions such as shooting and image display are controlled based on the operation signal supplied from the operation unit 20.

<Configuration of playback device 4>
FIG. 17 is a configuration diagram showing the configuration of the playback device 4 provided in the imaging system 10 that is Embodiment 4 of the present invention.

  The reproduction apparatus 4 includes an extraction unit 51, an image temporary storage unit 54, a digital zoom processing unit 55, an image display unit 53, a ROM 57, a RAM 58, a digital zoom magnification calculation unit 62, and a zoom magnification storage unit 61. The operation unit 20 and the control unit 63 are provided.

  The extraction unit 51 extracts image data, zoom magnification, and zoom speed from the zoom image data.

  The temporary image storage unit 54 stores the image data extracted by the extraction unit 51 for the detection time calculated by the detection time calculation circuit 63b of the control unit 63 described later.

  The digital zoom processing unit 55 enlarges or reduces an image obtained based on the image data stored in the image temporary storage unit 54 by digital processing to generate digital corrected image data.

  The image display unit 53 displays a display image based on the digital corrected image data generated by the digital zoom processing unit 55.

  The ROM 57 stores the zoom magnification change characteristic as a zoom magnification change condition.

  The details are the same as the zoom magnification change condition stored in the ROM 17 of the image capturing apparatus 1 that is Embodiment 1 of the present invention shown in FIG.

  The RAM 58 is composed of a volatile semiconductor element or the like, and associates the digital zoom magnification for the detection time calculated by the digital zoom magnification calculation unit 62 described later with the image data for the detection time stored in the image temporary storage unit 54. In addition to the various data supplied from the control unit 63.

  The digital zoom magnification calculation unit 62 changes the enlargement or reduction of the display image displayed on the image display unit 53 when it is determined by the zoom magnification change determination circuit 63a of the control unit 63 described later that the zoom magnification change condition is met. The digital zoom processing unit 55 calculates a digital zoom magnification for enlarging or reducing the image so that the state gradually changes.

  The zoom magnification storage unit 61 calculates the zoom magnification for the detection time extracted by the extraction unit 51 calculated by the detection time calculation circuit 63b, and the image temporary storage unit 54 for the detection time calculated by the detection time calculation circuit 63b. Is stored in association with the image data stored in.

  The operation unit 20 includes various operation buttons and the like, and generates various operation signals based on operations of the various operation buttons and the like by the user.

  The control unit 63 performs central control of the playback device 4. Specifically, basic functions such as reproduction and display of image data are controlled based on an operation signal supplied from the operation unit 20.

  Moreover, the control part 63 is provided with the zoom magnification change determination circuit 63a and the detection time calculation circuit 63b on the function.

  The zoom magnification change determination circuit 63 a determines whether or not the change in zoom magnification stored in the zoom magnification storage unit 61 matches the zoom magnification change condition stored in the ROM 57.

  The detection time calculation circuit 63b calculates the detection time according to the zoom speed extracted by the extraction unit 51, similarly to the imaging device 2 shown in the second embodiment of the present invention.

<Operation of the playback device 4>
Next, the operation of the playback apparatus 4 provided in the photographing system 10 that is Embodiment 4 of the present invention will be described.

  The playback device 4 performs zoom magnification change determination processing and zoom magnification correction processing. Therefore, each process will be described in detail below.

≪Zoom magnification change determination process≫
FIG. 18 is a diagram illustrating zoom magnification change determination processing of the playback device 4 provided in the imaging system 10 that is Embodiment 4 of the present invention.

  When the optical disc 7 is inserted, the extraction unit 51 extracts zoom image data including image data, a zoom magnification, and a zoom speed from the zoom image data stored on the optical disc 7, and the extracted image data is temporarily stored in the image. While supplying to the memory | storage part 54, the zoom magnification and zoom speed which were extracted are supplied to the control part 63. FIG.

  Then, the zoom magnification change determination circuit 63 a of the control unit 63 stores the zoom magnification supplied from the extraction unit 51 in the zoom magnification storage unit 61.

  Next, the zoom magnification change determination circuit 63a of the control unit 63 changes the zoom magnification, that is, the zoom magnification, from the zoom magnification corresponding to the detection time PT calculated by the detection time calculation circuit 63b stored in the zoom magnification storage unit 61. The number of change states, the change state of the zoom magnification, and the period length of each change state are extracted.

  The number of zoom magnification changes refers to the number of periods during which the zoom magnification change rate is constant. The zoom magnification change state refers to the increase in zoom magnification during a period when the zoom magnification change rate is constant. (Zoom up), constant (no zoom change) or down (zoom down) is a symbol that indicates whether or not the change period length is constant zoom magnification change rate It means the length of a certain period.

  In the example shown in FIG. 18, the zoom magnification change determination circuit 63a determines the number of states of zoom magnification change at the detection time PT as the state between a1 and a2 (first state 911) and the state between a2 and a3 (first). 2 912) and a state between a3 and a4 (third state 913) are extracted as “3”.

  Further, the zoom magnification change determining circuit 63a sets the change state of the optical zoom magnification in the first state 911 to “zoom up” and the change state of the zoom magnification in the second state 912 as “no change” as the zoom magnification change state. "The change state of the zoom magnification in the third state 913 is extracted as" zoom up ".

  Furthermore, the zoom magnification change determination circuit 63a sets the period length of the first state 911 as “ST1”, the second state 913 as “ST2”, and the third state 913 as the period length of the change state. The length is extracted as “ST3”.

  Next, the zoom magnification change determination circuit 63a indicates the zoom magnification change condition stored in the ROM 57, that is, the zoom magnification change condition stored in the ROM 57, that is, the zoom magnification change state, the change state of the zoom magnification, and the length of each change state shown in FIG. It is determined whether the zoom magnification change condition is met.

  In the example shown in FIG. 18, the number of zoom magnification change states is “3”, and the zoom magnification change states are “zoom up”, “no change”, and “zoom up”. The zoom magnification change condition 302 is extracted as the magnification change condition. Then, the zoom magnification change determination circuit 63a extracts the conditional expressions “ST2 ≦ e12” and “ST3 ≧ e13” of the state period length 203 from the zoom magnification change condition 302, and the period lengths ST2 and ST3 are extracted. It is determined whether or not the conditional expression is satisfied.

  If it is determined that this conditional expression is satisfied, the zoom magnification change determination circuit 63a determines that the change in the zoom magnification at the detection time PT matches the zoom magnification change condition stored in the ROM 57.

≪Zoom magnification correction process≫
FIG. 19 is a diagram illustrating zoom magnification correction processing by the digital zoom magnification calculator 62 of the playback apparatus 4 provided in the imaging system 10 that is Embodiment 4 of the present invention.

  As shown in FIG. 19, when the zoom magnification change determination circuit 63a determines that the change in the zoom magnification at the detection time PT matches the zoom magnification change condition, the digital zoom magnification calculation unit 62 displays the image display unit 53 in the image display unit 53. The corrected zoom magnification 904 is calculated so that the transition of the change state of enlargement or reduction of the displayed display image becomes gentle.

  Specifically, the digital zoom magnification calculator 62 calculates a straight line connecting the zoom magnification (a2) at the time t3 and the zoom magnification (a4) at the time t5 as the corrected zoom magnification 904.

  Next, the digital zoom magnification calculator 62 calculates a digital zoom magnification for the digital zoom processor 55 to enlarge or reduce the image based on the calculated corrected zoom magnification 904. Specifically, the digital zoom magnification is calculated using the following Equation 3 during the period when the corrected zoom magnification 904 is calculated, that is, from the time t3 to the time t5.

DZ = RZ / Z (Formula 3)
Here, DZ is a digital zoom magnification, RZ is a corrected zoom magnification, and Z is a zoom magnification stored in the zoom magnification storage unit 61.

  The digital zoom magnification calculation unit 62 stores the digital zoom magnification 905 calculated in this way in the RAM 58 in synchronization with the image data stored in the image temporary storage unit 54.

  Next, the digital zoom processing unit 55 generates digital corrected image data by enlarging or reducing the image data stored in the image temporary storage unit 54 based on the digital zoom magnification calculated by the digital zoom magnification calculating unit 62. The display image is displayed on the image display unit 53 based on the generated digital correction image data.

  As described above, according to the playback device 4 of the photographing system 10 that is Embodiment 4 of the present invention, when it is determined that the change in the zoom magnification stored in the zoom magnification storage unit 61 matches the zoom magnification change condition. Since the digital zoom magnification is calculated so that the transition of the change state of the enlargement or reduction of the display image displayed on the image display unit 53 becomes gradual, it is appropriate for the image when the user performs a zoom error operation. And the corrected image can be displayed.

  In the fourth embodiment of the present invention, the change in the optical zoom magnification at the detection time PT calculated according to the speed of the set optical zoom magnification is extracted, and the digital zoom magnification is calculated based on the extracted change in the optical zoom magnification. However, the present invention is not limited to this, and the detection time PT may be a fixed value.

1 is a configuration diagram illustrating a configuration of a photographing apparatus that is Embodiment 1 of the present invention. It is a figure explaining the digital processing by the digital zoom process part which comprises the imaging device which is Example 1 of this invention, (a) has shown the picked-up image, (b), (c) is a digital zoom. The display image by which the picked-up image was expanded by the process part is shown. It is the figure which showed an example of the zoom magnification change conditions which ROM which comprises the imaging device which is Example 1 of this invention memorize | stores. It is a figure explaining the optical zoom magnification memory | storage process and the optical zoom magnification change determination process of the imaging device which is Example 1 of this invention. It is a figure explaining the optical zoom magnification correction process by the digital zoom magnification calculation part 22 of the imaging device which is Example 1 of this invention. It is a figure explaining the optical zoom magnification correction process by the digital zoom magnification calculation part in the case of calculating the straight line connecting the start point and the end point of the optical zoom magnification during the detection time PT as the correction zoom magnification. (A) is a figure explaining the relationship between detection time and optical zoom speed when the optical zoom speed is low, and (b) shows the relationship between detection time and optical zoom speed when the optical zoom speed is high. FIG. It is the block diagram which showed the structure of the imaging device which is Example 2 of this invention. It is the figure which showed the relationship between an optical zoom speed and detection time. It is the block diagram which showed the structure of the imaging device which is Example 3 of this invention. It is a figure explaining the 1st digital zoom magnification storage process and the digital zoom magnification change determination process by the imaging device which is Embodiment 3 of the present invention. It is a figure explaining the digital zoom magnification correction process by the 2nd digital zoom magnification calculation part of the imaging device which is Example 3 of this invention. It is a block diagram which shows the structure of the imaging | photography system which is Example 4 of this invention. It is the block diagram which showed the structure of the imaging device with an optical zoom function with which the imaging system which is Example 4 of this invention was equipped. It is the figure which showed an example of the zoom image data recorded on the image recording part which comprises the imaging device with an optical zoom function with which the imaging system which is Example 4 of this invention was equipped. It is the block diagram which showed the structure of the imaging device with a digital zoom function with which the imaging system which is Example 4 of this invention was equipped. It is the block diagram which showed the structure of the reproducing | regenerating apparatus 4 with which the imaging | photography system which is Example 4 of this invention was equipped. It is the figure explaining the zoom magnification change determination process of the reproducing | regenerating apparatus 4 with which the imaging | photography system which is Example 4 of this invention was equipped. It is a figure explaining the zoom magnification correction process by the digital zoom magnification calculation part which comprises the reproducing | regenerating apparatus 4 with which the imaging system which is Example 4 of this invention is equipped.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1, 2, 3 ... Shooting device 4 ... Playback apparatus 4 ... Shooting system 5 ... Shooting device with optical zoom function 6 ... Shooting device with digital zoom function 7 ... Optical disk 10 ... Shooting system 11 ... Optical zoom processing part 12, 24, 32 ... Optical imaging unit 13,33,53 ... Image display unit 14 ... Temporary image storage unit 15,35,44,55 ... Digital zoom processing unit 16,25,36,45 ... Image recording unit 17,26,37,46 57 ... ROM
18, 27, 38, 47, 58 ... RAM
DESCRIPTION OF SYMBOLS 19, 39 ... Zoom magnification input part 20 ... Operation part 21 ... Optical zoom magnification memory | storage part 22, 62 ... Digital zoom magnification calculation part 23, 28, 33, 43, 48, 63 ... Control part 23a ... Optical zoom magnification change determination circuit 23b, 63b ... detection time calculation circuit 35a ... first digital zoom processing circuit 35b ... second digital zoom processing circuit 41 ... first digital zoom magnification storage unit 42 ... second digital zoom magnification calculation unit 43a ... digital zoom Magnification change determination circuit 51 ... Extraction unit 54 ... Temporary image storage unit 61 ... Zoom magnification storage unit 63a ... Zoom magnification change determination circuit

Claims (6)

Imaging optical means for photoelectrically converting incident imaging light by an imaging element to generate image data;
Image display means for displaying an image based on the generated image data;
An optical zoom processing means for changing an optical zoom magnification of imaging light to be incident on the photographing optical means based on an operation signal supplied from the outside;
Optical zoom magnification change condition storage means for storing the characteristics of the optical zoom magnification change by the optical zoom processing means as a zoom magnification change condition;
Photographic image temporary storage means for storing image data for a predetermined detection time generated by the photographic optical means;
Digital zoom processing means for enlarging or reducing an image obtained based on image data stored in the captured image temporary storage means by digital processing;
Image recording means for recording image data of a corrected image enlarged or reduced by the digital zoom processing means;
Optical zoom magnification storage means for storing the optical zoom magnification for the predetermined detection time in association with image data for the predetermined detection time stored in the captured image temporary storage means;
Optical zoom magnification change determination means for determining whether or not the change in optical zoom magnification stored in the optical zoom magnification storage means matches the zoom magnification change condition stored in the optical zoom magnification change condition storage means;
When the optical zoom magnification change determining means determines that the zoom magnification change condition is met, the digital zoom processing is performed so that the change state of the correction image enlargement or reduction gradually changes for the predetermined detection time. Digital zoom magnification calculating means for calculating a digital zoom magnification for the means to enlarge or reduce the image;
An imaging apparatus comprising: A detection time calculating means for calculating the detection time according to a change speed of the optical zoom magnification;
The captured image temporary storage means includes:
Storing the image data generated by the imaging optical means for the calculated detection time;
The optical zoom magnification storage means includes
Storing the optical zoom magnification for the calculated detection time in association with the image data stored in the captured image temporary storage means for the calculated detection time;
The digital zoom magnification calculating means includes
When the optical zoom magnification change determining unit determines that the zoom magnification change condition is satisfied, the digital zoom is performed so that the change state of the correction image enlargement or reduction in the calculated detection time gradually changes. The photographing apparatus according to claim 1, wherein the processing means calculates a digital zoom magnification for enlarging or reducing the image. Imaging optical means for photoelectrically converting incident imaging light by an imaging element to generate image data;
First digital zoom processing means for enlarging or reducing the image data generated by the photographing optical means at a first digital zoom magnification by digital processing based on an operation signal supplied from the outside;
Image display means for displaying an image enlarged or reduced by the first digital zoom processing means;
A digital zoom magnification change condition storage means for storing a change characteristic of the first digital zoom magnification as a zoom magnification change condition;
Photographic image temporary storage means for storing image data for a predetermined detection time enlarged or reduced by the first digital zoom processing means;
Second digital zoom processing means for enlarging or reducing an image obtained based on image data stored in the captured image temporary storage means at a second digital zoom magnification by digital processing;
Image recording means for recording the image data of the corrected image enlarged or reduced by the second digital zoom processing means;
First digital zoom magnification storage means for storing the first digital zoom magnification for the predetermined detection time in association with the image data for the predetermined detection time stored in the captured image temporary storage means;
Digital zoom for determining whether or not a change in the first digital zoom magnification stored in the first digital zoom magnification storage means matches a zoom magnification change condition stored in the digital zoom magnification change condition storage means Magnification change determination means;
When the digital zoom magnification change determining means determines that the zoom magnification change condition is met, the second change is performed so that the change state of enlargement or reduction of the corrected image in the predetermined detection time gradually changes. Second digital zoom magnification calculating means for calculating a second digital zoom magnification for the digital zoom processing means to enlarge or reduce the image;
An imaging apparatus comprising: A detection time calculating means for calculating the detection time according to a change speed of the first digital zoom magnification;
The captured image temporary storage means includes:
Storing the image data enlarged or reduced by the first digital zoom processing means for the calculated detection time;
The first digital zoom magnification storage means includes:
Storing the first digital zoom magnification for the calculated detection time in association with the image data stored in the captured image temporary storage means for the calculated detection time;
The second digital zoom magnification calculating means includes:
When the digital zoom magnification change determining means determines that the zoom magnification change condition is met, the second change is performed so that the change state of enlargement or reduction of the corrected image in the calculated detection time gradually changes. The photographing apparatus according to claim 3, wherein the digital zoom processing means calculates a second digital zoom magnification for enlarging or reducing the image. When image data photographed by a photographing apparatus having a zoom function and zoom image data associated with the zoom magnification at the time of photographing are supplied from the outside, based on the supplied zoom image data A playback device for playing back the image data,
Extraction means for extracting the image data and the zoom magnification from the zoom image data;
Image temporary storage means for storing image data for a predetermined detection time extracted by the extraction means;
Zoom magnification change condition storage means for storing the zoom magnification change characteristic as a zoom magnification change condition;
Digital zoom processing means for generating digital corrected image data by enlarging or reducing an image obtained based on image data stored in the image temporary storage means by digital processing;
Image display means for displaying a display image based on the digital image data generated by the digital zoom processing means;
Zoom magnification storage means for storing the zoom magnification for the predetermined detection time extracted by the extraction means in association with the image data for the predetermined detection time stored in the image temporary storage means;
Zoom magnification change determination means for determining whether or not a change in zoom magnification stored in the zoom magnification storage means matches a zoom magnification change condition stored in the zoom magnification change condition storage means;
When the zoom magnification change determining means determines that the zoom magnification change condition is met, the change state of the enlargement or reduction of the display image for the predetermined detection time displayed on the image display means is changed gradually. A digital zoom magnification calculating means for calculating a digital zoom magnification for the digital zoom processing means to enlarge or reduce the image;
A playback apparatus comprising: The zoom image data further includes a change speed of the zoom magnification,
The extraction means includes
Extracting the image data, the zoom magnification and the change speed from the zoom image data,
A detection time calculation means for calculating the detection time according to the extracted change rate;
The image temporary storage means includes
Storing the image data extracted by the extraction means for the calculated detection time;
The zoom magnification storage means
The zoom magnification extracted by the extraction means for the calculated detection time is stored in association with the image data stored in the image temporary storage means for the calculated detection time,
The digital zoom magnification calculating means includes
When the zoom magnification change determining means determines that the zoom magnification change condition is met, the state of enlargement or reduction of the display image corresponding to the calculated detection time displayed on the image display means changes gradually. The reproduction apparatus according to claim 5, wherein the digital zoom processing means calculates a digital zoom magnification for enlarging or reducing the image.

Images