JP2009100371A - Image display apparatus, and recording and reproducing apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an image display apparatus can recognizing a specific subject to be focused efficiently. <P>SOLUTION: The image display apparatus includes a first detection means for detecting a position of the subject in an image, a second detection means for detecting the position of the subject in the image and a selection means for selecting at least one from the first and second detection means. The image display apparatus also includes a display means for superimposing a subject index on the position detected by the selected detection means, and displaying the image. The respective means are implemented by functions of a system controller 112. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an image display apparatus and a recording / reproducing apparatus, and more particularly to an image display apparatus and a recording / reproducing apparatus having a function of marking a specific object or a specific area on an image.

  In recent years, small and light HD video cameras and HD displays have rapidly emerged as a product group that handles high definition video HD (High Definition). As a result, the environment for easily “taking” and “watching” high-definition high-definition video that could only be handled by business equipment in personal use has been expanded.

  As this background art, along with miniaturization of image sensor elements and high-speed transfer processing in HD imaging systems, There is progress in high-efficiency encoding technology represented by the H.264 standard. Also in HD displays, liquid crystal type, plasma type, EL (Electro-Luminous) type, etc., are becoming thinner, higher definition and larger screen.

  In addition, storage technology that handles vast amounts of video data has become more sophisticated, and large-capacity removable media and terabyte order servers that are compatible with the HD era have been realized.

  Against this background, it is now possible to freely “take” or “watch” high-definition video HD, and the need for high-quality creative video is increasing. In this way, various assistive technologies have been proposed for “taking” or “seeing” high-quality video.

For example, Patent Document 1 proposes an automatic tracking technique for a photographing camera. Specifically, Patent Document 1 extracts features from a specific subject and performs pan and tilt control that automatically tracks the movement of the photographing camera to the movement of the subject, thereby reliably capturing the subject on the screen. , We are proposing a technique to take high-quality images.
JP 2003-69884 A

  According to the above-described conventional technique, a subject can be placed in an imaging frame by identifying a specific subject from a large number of people in shooting at an athletic meet or a presentation. However, the video shot in this way is a video in which a large number of people or things other than the subject appear, and the subject is confused with a complicated background.

  That is, a new problem has become apparent that it becomes difficult to recognize a subject to be noted from the viewer's standpoint during video playback.

  For example, when a home video image of personal photography is viewed by a family member, an acquaintance, or a friend, there is a current situation that it is very difficult to understand where the person or object to be noted is located without the explanation of the photographer. If you are inadvertent, you may miss a scene where the subject appears for a moment.

  In personal use home videos, there are almost no cases where the intention of shooting or viewing cannot be clearly indicated by editing or the like, such as television broadcasting, and the point of interest from the viewpoint of the viewer becomes unclear.

  In order to solve this problem, a technique for storing the position of the AF frame for optimizing the focus state and the exposure state as shooting metadata and displaying the position of the AF frame during reproduction can be considered. According to this technique, it is possible to display an index for indicating the position of the main subject in the image data, and the point of interest can be clarified.

  However, the subject for which the AF frame is set at the time of shooting and the subject to be noticed at the time of reproduction are not always the same. For example, in the case of showing an image taken with one's child at the child's athletic meet to other children's families, it is preferable to provide an index indicating the position of the other child.

  As described above, in the conventional technique, there is a problem that viewing support when watching the shot video is unfriendly.

  An object of the present invention is to provide an image display apparatus and a recording / reproducing apparatus that can effectively identify a specific subject to be noted.

  In order to achieve the above object, the image display device according to claim 1 includes first detection means for detecting a position of a subject in the image, and second detection means for detecting a position of the subject in the image. , A selection means for selecting at least one of the first detection means and the second detection means, and the subject detected by the selected first detection means or the second detection means. And display means for displaying the image with a subject index superimposed on the position.

  The recording / reproducing apparatus according to claim 8 is a first detection unit that detects a position of a subject in the image, a second detection unit that detects a position of the subject in the image, and the first detection unit. A selection unit that selects at least one of the second detection units, and a subject index superimposed on the position of the subject detected by the selected first detection unit or the second detection unit. And display means for displaying the image.

  According to the present invention, it is possible to effectively identify a specific subject to be noted.

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

  FIG. 1 is a functional block diagram of a recording / reproducing apparatus according to an embodiment of the present invention.

  The recording / reproducing apparatus (imaging apparatus) 100 shown in FIG. 1 and the transmitter 130 attached to the subject photographed (recorded) by the recording / reproducing apparatus 100 constitute a recording / reproducing system.

  The portable transmitter 130 includes an infrared light transmitter 131 and a controller 132, and is used by being attached to a subject. The control unit 132 is operated by a battery power supply (not shown), drives the light emitting element of the infrared light transmission unit 131, and transmits infrared light to the outside through a lens (not shown).

  The infrared light is reflected by the subject, and the infrared light detection unit 111 described below detects the reflected infrared light, whereby the coordinates of the subject at the shooting angle of view are specified.

  Next, the recording / reproducing apparatus 100 will be described.

  The recording / reproducing apparatus 100 adjusts the light amount of the optical image that reaches the fixed front lens 101, the zoom lens 102 for changing the magnification of the optical image reflected by the subject, and the first image sensor 107 described later. And an aperture device 103 for performing exposure control.

  In addition, the recording / reproducing apparatus 100 includes a focus lens 104 for adjusting the focus position by adjusting the imaging position of the optical image reaching the first image sensor 107. Further, the recording / reproducing apparatus 100 includes a splitter 105 for dividing the optical image transmitted through the focus lens 104 into two, leading one to the optical filter 106 and guiding the other to the infrared light transmission filter 109.

  In addition, the recording / reproducing apparatus 100 includes an optical filter 106 and an image sensor 107. An optical image transmitted through the optical filter 106 is formed on the image sensor 107. The image sensor 107 has a photoelectric conversion function such as a CCD or a CMOS sensor, and sequentially transfers the accumulated charges in the vertical direction and the horizontal direction to generate an image signal.

  In addition, the recording / reproducing apparatus 100 includes a camera signal processing unit 108. The camera signal processing unit 108 performs predetermined camera signal processing such as well-known color separation, gradation correction, and white balance adjustment on the image signal generated by the image sensor 107, and outputs image data.

  The recording / reproducing apparatus 100 includes an infrared light transmission filter 109 and an image sensor 110. The infrared light transmission filter 109 has a function of passing only the infrared wavelength region, and an optical image transmitted through the infrared light transmission filter 109 is formed on the image sensor 110.

  The image sensor 110 has a photoelectric conversion function such as a CCD or CMOS sensor, and sequentially transfers the accumulated charges in the vertical direction and the horizontal direction to generate an infrared light detection signal.

  Further, the recording / reproducing apparatus 100 includes an infrared light detection unit 111 and a system controller 112. The infrared light detection unit 111 obtains two-dimensional coordinates within the shooting angle of view of the subject wearing the transmitter 130 from the infrared light detection signal generated by the image sensor 110 and outputs the two-dimensional coordinates to the system controller 112 as subject coordinates. To do.

  The system controller 112 has a central processing function (CPU). By executing a program stored in a memory (not shown) of the system controller 112, the entire system of the recording / reproducing apparatus 100 is controlled in an integrated manner.

  The system controller 112 has a function of receiving and executing a command instructed by a user. Further, the system controller 112 manages the position information of the subject detected by the infrared light detection unit 111 in shooting metadata.

  Further, the system controller 112 also takes a series of imaging parameters such as a zoom magnification, an aperture value, and a white balance setting value at the time of shooting as shooting metadata, and manages them as image data attribute information together with the image data. These shooting metadata are recorded in a predetermined area of the recording medium 119 together with the shot image data.

  The recording / reproducing apparatus 100 also includes a drive circuit 113 that controls the drive timing of the image sensor 107 and a zoom lens drive circuit 114.

  The zoom lens driving circuit 114 changes the position of the zoom lens 102 according to the amount of operation of a zoom button (not shown), and changes the magnification of the optical image. The zoom lens driving circuit 114 also has a function of detecting the position of the zoom lens 102 and transmitting it to the system controller 112 when the zoom lens 102 is moved manually.

  Further, the recording / reproducing apparatus 100 includes an aperture driving circuit 115 and a focus lens driving circuit 116.

  The diaphragm drive circuit 115 changes the aperture diameter of the diaphragm device 103 in accordance with an instruction from the system controller 112. The focus lens drive circuit 116 changes the position of the focus lens 104 in accordance with an instruction from the system controller 112.

  The camera signal processing unit 108 obtains an AF evaluation value and a subject luminance value based on the imaging signal input from the imaging element 107. Based on the AF evaluation value, the subject luminance value, and the position information of the subject detected by the infrared light detection unit 111, the system controller 112 optimizes the focus state and the exposure state of the subject position. The following circuits are controlled.

  That is, the system controller 112 controls the drive circuit 113, the aperture drive circuit 115, and the focus lens drive circuit 116.

  In addition, the recording / reproducing apparatus 100 includes a compression / decompression unit 117. The compression / decompression unit 117 performs video compression / decompression processing conforming to the format of the recording medium 119 such as MPEG2 or MPEG4 on the image data generated by the camera signal processing unit 108.

  Further, the recording / reproducing apparatus 100 includes a recording / reproducing processing unit 118 responsible for recording and reproducing data on the recording medium 119. In this embodiment, the recording medium 119 is a disc. The recording / reproducing processor 118 controls the rotation of the disk and the access of the optical head by a disk servo (not shown), and is responsible for recording or reproducing data at a predetermined address on the board surface of the recording medium 119.

  Here, a recording / reproducing operation on the recording medium 119 when a disc is used will be described.

  In the recording medium 119, the recording layer is made of a phase change material such as Ge—Sb—Te, and the recording layer reversibly changes between an amorphous state and a crystalline state when irradiated with light beam intensity modulated while rotating. To do.

  In order to change the recording layer from the crystalline state to the amorphous state, the light beam is irradiated in a pulse shape, once melted, and then rapidly cooled. On the other hand, in order to change the crystalline state from the amorphous state, annealing is performed at a temperature equal to or higher than the crystallization temperature by irradiation with a laser beam having a relatively weak light beam intensity.

  Information is recorded or reproduced using optical changes in these two states. At the time of reproduction, a reproduction signal is extracted by utilizing the fact that the reflectance is different in the above two states, and known waveform equalization, binarization processing, demodulation processing, and ECC (Error Correction Code) are performed. Then, the processed signal is output to the compression / decompression unit 117 and subjected to image decoding processing in accordance with the format.

  The recording / reproducing apparatus 100 includes a display unit 121 such as a TFT (Thin Film Transistor) or an LCD (Liquid Crystal Display). The display unit 121 displays a still image or a moving image based on the image data generated by the camera signal processing unit 108 or the image data read from the recording medium 119.

  In addition, the display unit 121 has an interface function for receiving the system operation status and management information of the recording / reproducing apparatus 100, a command instruction, and the like.

  Further, the recording / reproducing apparatus 100 includes a display control unit 120, a subject display setting unit 122, and a display attribute setting unit 123.

  The display control unit 120 controls the display unit 121. The subject display setting unit 122 sets whether to perform subject display based on shooting metadata, which will be described later, or to perform subject display based on the subject identification result in accordance with a user instruction, and outputs the subject display to the system controller 112. The display attribute setting unit 123 sets a display form of an index representing the position of the subject and outputs it to the system controller 112.

  In addition, the recording / reproducing apparatus 100 includes a subject feature extraction unit 124. The subject feature extraction unit 124 performs face detection processing on the image data read from the recording medium 119 via the compression / decompression unit 117 and the camera signal processing unit 108.

  For example, the subject feature extraction unit 124 extracts a shape corresponding to a constituent element of a face such as a mouth or an eye from image data, and detects a face region based on the position of the constituent element. The subject feature extraction unit 124 further extracts face information related to the shape of the constituent elements of the subject's face from each of the face regions.

  The face information includes, for example, information on specific shapes and coordinates such as the mouth, eyes, and eyebrows, or, for example, information on the shape and coordinates of the nose end point, the nostril center point, the ear end point, Includes their color information.

  Here, the face information is obtained by measuring the distance (position) using a method such as edge detection using a neural network or a spatial filter, for example, in the face image inputted with each end point, center point, or black point of the eye. It can be extracted by calculating.

  In addition, the recording / reproducing apparatus 100 includes a subject identifying unit 125 and a memory 126. The subject identifying unit 125 identifies the subject existing in the image data by matching the face information extracted by the subject feature extracting unit 124 with the personal face information registered in the memory 126 in advance. .

  Then, when an individual in the image data can be identified, the subject identification unit 125 outputs the personal face area coordinates as subject coordinates to the system controller 112 together with data for identifying the individual.

  As described above, the present embodiment has a function of obtaining the position of the target subject from the shooting metadata including the position information of the subject detected by the infrared light detection unit 111. In the present embodiment, a function for obtaining the position of the target subject from the identification result by the subject identification unit 125 for the reproduced image data is provided.

  Next, display examples of the subject index on the display unit 121 in this embodiment will be described with reference to FIGS. 2, 3, and 4.

  FIG. 2 is a diagram showing a first display example of the subject index by the display unit in FIG.

  Specifically, FIG. 2 shows an example in which image data is displayed by superimposing an arrow-shaped subject index on a target subject. FIG. 2A shows a display example of the subject index 201 during wide-angle shooting, and FIG. 2B shows a display example of the subject index 202 during enlarged shooting.

  If the subject index is displayed using the shooting metadata recorded together with the image data, the position of the subject index is determined based on the subject coordinates obtained by the infrared light detection unit 111. Then, the size of the target subject is estimated from the position information of the zoom lens 102 and the position information of the focus lens 104 included in the shooting metadata, and the size of the subject index is set.

  If the subject index is to be displayed when the image data does not include shooting metadata of the target subject, the position of the subject index is determined based on the subject coordinates obtained by the subject identifying unit 125. Then, the size of the subject index is set based on the face area obtained from the subject identifying unit 125.

  The subject index is displayed in a larger size than the subject because the target subject is likely to be confused with the background if the target subject is small (subject index 201). On the other hand, if the target subject is close-up, the subject can be easily identified, so that the subject is displayed in a smaller size than the subject (subject index 202).

  The luminance of the subject index is determined based on the luminance information obtained by the camera signal processing unit 108 for the image data. That is, when the average brightness of the image data is dark, a high-brightness arrow (subject index) such as white is displayed, and when the average brightness is bright, a low-brightness arrow (subject index) such as black is displayed.

  Thus, the visibility is improved by optimizing the identification display according to the position, size, and luminance information of the target subject in the image data.

  Note that ON / OFF of the display of the subject index can be designated in advance by the user.

  FIG. 3 is a diagram illustrating a second display example of the subject index by the display unit in FIG.

  Specifically, FIG. 3 illustrates an example in which the display unit 121 displays image data by superimposing a frame-shaped subject index on a target subject instead of an arrow-shaped subject index. FIG. 3A shows a display example of the subject index 301 during wide-angle shooting, and FIG. 3B shows a display example of the subject index 302 during enlarged shooting.

  Thus, the form of the subject index is not limited to a specific form, and images, characters, and the like can be used.

  FIG. 4 is a diagram showing a third display example of the subject index by the display unit in FIG.

  Specifically, FIG. 4 is a display example in which frame-like subject indices 401 and 402 are superimposed on the image data, as in FIG. 3, but unlike FIG. 3, a region other than the target subject is conspicuous. The masking process to make it disappear is given.

  Normal image data is displayed inside the subject indicators 401 and 402, but the outside of the subject indicators 401 and 402 is subjected to a so-called shadow mask process in which a gray luminance level is superimposed.

  According to this display form, the user can pay attention only to the subject that the user wants to pay attention to, and can enhance the subject identification effect. Here, the brightness level of the masking process may be variable according to the brightness of the image data.

  As a display method of masking, in addition to the shadow mask as shown in FIG. 4, it is possible to specify in advance according to the user's preference such as shading, solid color, no display (black). The shape of the frame is not limited to a quadrangle, and a round shape, a polygon shape, or a specific image frame can be used.

  The display attribute setting unit 123 controls the display control unit 120 via the system controller 112 according to the user's instruction, so that the user can freely select the display mode of the subject index as shown in FIGS. can do.

  Further, in the present embodiment, the subject display setting unit 122 selects the following subject index display in accordance with a user instruction.

  That is, the subject display setting unit 122 displays the subject index using the shooting metadata including the position information of the subject detected by the infrared light detection unit 111, or the subject identification unit 125 without using the shooting metadata. Whether to display the subject index is selected on the basis of the subject coordinates obtained in the above.

  For example, if the shooting is performed with the transmitter 130 attached to the child at the athletic meet of his child, the subject index can be easily displayed to the child by using the shooting metadata. .

  On the other hand, when the subject index is to be displayed to other children from the same image data, the face information of the other children is registered in the memory 126 in advance, and the subject identification result of the subject identifying unit 125 is used. The subject index can be displayed for other children.

  One of these subject indices can be selected, or both can be displayed simultaneously. If face information of a plurality of people is registered in advance, the subject identifying unit 125 can identify a plurality of people at the same time.

  The user can freely select whether the subject index is displayed on his / her child wearing the transmitter 130 or the subject index is displayed on other children not wearing the transmitter 130. Alternatively, it is possible to display the subject index for both at the same time.

  FIG. 5 is a diagram showing a fourth display example of the subject index by the display unit in FIG.

  Specifically, in this example, the subject indices 201 and 301 are displayed by using the shooting metadata and the subject identification result of the subject identification unit 125 at the same time.

  While the subject index 201 is reliably displayed for the child using the shooting metadata, the subject index 301 is also displayed for the other children if other children appear in the same image. At this time, if the display forms of the subject indices are different from each other, it becomes easy to grasp which object is located at a glance.

  By using this function, it is possible to reliably display the subject index for the target subject at the time of shooting, and it is also possible to respond to a request for displaying the subject index for other subjects. It becomes possible.

  FIG. 6 is a flowchart showing a procedure of subject index display processing executed by the recording / reproducing apparatus of FIG.

  This process is executed under the control of the system controller 112 in FIG.

  The recording / reproducing apparatus 100 can perform an operation of displaying a subject index at the time of shooting or reproduction. When the setting for displaying the subject index is made, the recording / reproducing apparatus 100 starts the processing from step S101.

  In step S101, image data is first captured. This image data may be a signal obtained by converting an image pickup signal obtained by the image pickup element 107 by photographing into image data by the camera signal processing unit 108, or may be read by the recording / playback processing unit 118 from the recording medium 119.

  Then, the subject display setting unit 122 determines whether the setting is to display the subject index using the shooting metadata including the position information of the subject detected by the infrared light detection unit 111. Proceed to S102, otherwise proceed to step S104.

  In step S102, shooting metadata attached to the image data is read, subject coordinates are read from the shooting metadata, and the position of the subject index is determined.

  Step S102 functions as first detection means for detecting the position of the subject in the image. Further, the first detection means detects the position of the subject to be subjected to focus control when acquiring an image. The first detection means detects the position of the subject using a transmitter 130 provided to the subject.

  In step S103, the size of the target subject is estimated from the position information of the zoom lens 102 and the position information of the focus lens 104 in the shooting metadata attached to the image data.

  In step S104, it is determined whether the subject display setting unit 122 is configured to display the subject index based on the subject coordinates obtained by the subject identifying unit 125 without using the shooting metadata attached to the image data. To do. If so, the process proceeds to step S105, and if not, the process proceeds to step S107.

  In step S <b> 105, the subject identifying unit 125 matches the face information extracted by the subject feature extraction unit 124 with the face information registered in the memory 126, thereby identifying a person designated in advance by the user. Then, the coordinates of the face area of the person are read out as subject coordinates, and the position of the subject index is determined.

  Step S105 functions as a second detection unit that detects the position of the subject in the image. Further, the second detection means detects the position of the subject by comparing the feature amount extracted from the read image with the feature amount stored in advance.

  Steps S101 and S104 function as selection means for selecting at least one of the first detection means and the second detection means.

  In step S106, the size of the identified face area is read out.

  In step S107, the display mode of the subject index set by the display attribute setting unit 123 is read out. The display mode of the subject index is a specific display mode of the subject index described with reference to FIGS.

  As shown in FIG. 5, it is also possible to display the subject index 201 based on the shooting metadata and the subject index 301 based on the identification result of the subject identifying unit 125 simultaneously with different display forms.

  In step S107, the display form differs between the subject index superimposed on the position of the subject detected by the first detection means and the subject index superimposed on the position of the subject detected by the second detection means. It functions as a display attribute setting means.

  In step S108, the luminance of the image data is read and the average luminance is calculated.

  In step S109, the display size of the subject index is calculated based on the data relating to the size obtained in one or both of step S103 and step S106.

  Step S109 functions as a size changing unit that changes the size of the subject index based on the size of the selected detected subject.

  In step S110, the brightness of the subject index is calculated according to the average luminance obtained in step S108. In order to improve the visibility of the subject index, a high brightness subject index such as white is displayed when the average brightness of the image data is dark, and a low brightness subject index such as black is displayed when the average brightness is bright.

  Step S110 functions as a brightness changing unit that changes the brightness of the subject index based on the brightness of the image.

  In step S111, a subject index is formed based on the position obtained in steps S102 and S105, the display format read in step S107, the size calculated in step S109, and the brightness calculated in step S110. To do. Then, the subject index is displayed superimposed on the image data.

  Step S111 functions as display means for displaying an image by superimposing a subject index on the position of the subject detected by the selected first detection means or second detection means.

  In step S112, for example, it is determined whether there is an instruction from the user who needs to end the display of the subject index, such as the end of the playback mode. Capture.

  If the target for displaying the subject index is a moving image, the display of the subject index can be updated every frame or every several frames by repeating this process.

  As described above, according to the present embodiment, when a subject index indicating the main subject is to be displayed in the image data, a complex image is obtained by obtaining the subject position from shooting metadata and displaying the index. The index can be superimposed on the subject in the image data without processing.

  Since image processing is not used when displaying the subject index, it is possible to determine the position of the subject relatively accurately even in a situation where the subject is moving violently and the image is easily blurred.

  In addition to this, if you want to display an index for a subject that was not the main subject at the time of shooting, you can identify the target subject from the image data by the matching process, so that an index can be displayed for any subject other than the main subject. Can also be superimposed.

It is a functional block diagram of the recording / reproducing apparatus which concerns on embodiment of this invention. It is a figure which shows the 1st example of a display of the object parameter | index by the display part in FIG. It is a figure which shows the 2nd example of a display of the object parameter | index by the display part in FIG. It is a figure which shows the 3rd example of a display of the object parameter | index by the display part in FIG. It is a figure which shows the 4th example of a display of the object parameter | index by the display part in FIG. 3 is a flowchart showing a procedure of subject index display processing executed by the recording / reproducing apparatus of FIG. 1.

Explanation of symbols

DESCRIPTION OF SYMBOLS 100 Recording / reproducing apparatus 107 Imaging element 108 Camera signal processing part 110 Imaging element 111 Infrared light detection part 112 System controller 117 Compression / decompression part 118 Recording / reproducing processing part 119 Recording medium 120 Display control part 121 Display part 122 Subject display setting part 123 Display Attribute setting unit 124 Subject feature extraction unit 125 Subject identification unit 126 Memory

Claims (14)

First detecting means for detecting the position of the subject in the image;
Second detection means for detecting the position of the subject in the image;
Selection means for selecting at least one of the first detection means and the second detection means;
Display means for displaying the image by superimposing a subject index on the position of the subject detected by the selected first detection means or the second detection means;
An image display device comprising:   The image display apparatus according to claim 1, wherein the first detection unit detects a position of the subject that is a target of focus control when the image is acquired.   The image display apparatus according to claim 1, wherein the first detection unit detects the position of the subject using a transmitter attached to the subject.   The said 2nd detection means detects the position of the said subject by comparing the feature-value extracted from the read image with the feature-value stored beforehand. The image display device described in 1.   The image display apparatus according to claim 1, further comprising a size changing unit that changes the size of the subject index based on the size of the selected detected subject.   The image display apparatus according to claim 1, further comprising a brightness changing unit that changes the brightness of the subject index based on the brightness of the image.   The display form includes the subject index superimposed on the position of the subject detected by the first detection means and the subject index superimposed on the position of the subject detected by the second detection means. The image display apparatus according to claim 1, further comprising display attribute setting means for making different. First detecting means for detecting the position of the subject in the image;
Second detection means for detecting the position of the subject in the image;
Selection means for selecting at least one of the first detection means and the second detection means;
Display means for displaying the image by superimposing a subject index on the position of the subject detected by the selected first detection means or the second detection means;
A recording / reproducing apparatus comprising:   9. The recording / reproducing apparatus according to claim 8, wherein the first detection unit detects a position of the subject to be subjected to focus control when the image is acquired.   10. The recording / reproducing apparatus according to claim 8, wherein the first detection means detects the position of the subject using a transmitter provided to the subject.   The said 2nd detection means detects the position of the said subject by comparing the feature-value extracted from the read image with the feature-value stored beforehand. The recording / reproducing apparatus described in 1.   12. The recording / reproducing apparatus according to claim 8, further comprising size changing means for changing the size of the subject index based on the selected size of the detected subject.   13. The recording / reproducing apparatus according to claim 8, further comprising brightness changing means for changing the brightness of the subject index based on the brightness of the image.   The display form includes the subject index superimposed on the position of the subject detected by the first detection means and the subject index superimposed on the position of the subject detected by the second detection means. 14. The recording / reproducing apparatus according to claim 8, further comprising display attribute setting means for making different.

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