JPH11248724A - Image pickup device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To measure the moving speed of a subject without limiting the movement of the subject while picking up the image of the subject and to measure overall speed as well as the momentary speed of the subject. SOLUTION: A video controller 38 computes the distance traveled by a body, which is an object to be measured, in one field period on the basis of a motion vector detected by a motion detecting circuit 35. Then the video controller 38 computes the speed of the body, which is the object to be measured, by multiplying the ratio of the computed distance to a reference distance by time corresponding to the one field period.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an imaging device,
In particular, the present invention relates to an imaging device that can measure the speed of a subject.

[0002]

2. Description of the Related Art Image capturing apparatuses and video camera apparatuses capable of measuring the speed at which a subject moves while photographing the subject have been provided. These imaging devices and video camera devices use, as an image output, the speed of the subject measured by, for example, an optical speedometer together with the image of the subject.

For example, when measuring the speed of a golf swing, as shown in FIG. 19, a pair of optical speedometers are installed so as to sandwich a golf ball on the ground, and when a golfer hits the golf ball. The speed at which the golf club passes between the optical speedometers is measured.

[0004]

However, when such an optical speedometer is used, the golfer must swing such that the trajectory of the golf club head passes between the optical speedometers. At this time, the optical speedometer may hinder the swing, and there is a problem that an accurate swing speed cannot be measured.

Further, the golf swing speed can be measured only at the moment of passing between the pair of optical velocimeters. In addition, for example, the speed at the time of downing the golf club and the speed at the time of follow-through can be measured. It cannot be measured.

In the conventional video camera apparatus, although the video of the subject is recorded, the speed of the subject is only displayed on the monitor screen, and the video of the subject and the speed are recorded together. Absent. When the video recorded by the video camera device is reproduced, the video of the subject is displayed, but the speed at which the subject is moving is not displayed. Therefore, for example, when a golfer himself photographs his own golf swing, he can check his own golf swing, but he cannot confirm his own golf swing speed.

The present invention has been proposed in view of such circumstances, and measures the speed at which the subject moves without restricting the movement of the subject while photographing the image of the subject, and It is an object of the present invention to provide an imaging device capable of measuring not only the speed of an instant but also the entire speed.

[0008]

In order to solve the above-mentioned problems, an image pickup apparatus according to the present invention comprises: an image pickup means for outputting a video signal based on image pickup light of a subject; A motion vector detecting means for detecting a motion vector; a compressing means for compressing the video signal based on the detected motion vector; and A calculating unit for calculating the speed of the subject; and an output unit for converting the compressed video signal and the calculated speed into a predetermined format and outputting the converted signal.

In the image pickup apparatus, a motion vector of the subject is detected based on the video signal, and the video signal is compressed based on the motion vector.
The speed of the subject is calculated based on the motion vector of the video signal having a large light amount among the detected motion vectors.

An image pickup apparatus according to the present invention comprises: an image pickup means for outputting a video signal based on image pickup light of an object; a motion vector detection means for detecting a motion vector of the object based on the image pickup signal; Compression means for performing the compression processing of the video signal based on the detected motion vector; calculation means for calculating the speed of the subject based on the motion vector of the video signal having a large light amount among the detected motion vectors; Recording means for recording the obtained video signal and the calculated speed on a recording medium.

The imaging apparatus detects a motion vector of the subject based on the video signal, performs a compression process on the video signal based on the motion vector,
The speed of the subject is calculated based on the motion vector of the video signal having a large light amount among the detected motion vectors, and the video signal and the speed of the subject are recorded on a recording medium.

[0012]

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

The present invention is applied to, for example, a video camera device 1 having the configuration shown in FIG.

The video camera device 1 includes a camera block 20 for generating a video signal based on the imaging light incident through the optical system 1, a video signal processing unit 30 for performing a compression process or the like on the video signal, A media drive unit 40 for converting audio signals into a predetermined format; a deck unit 50 for recording data on the optical disk 100 or reading data recorded on the optical disk 100;
It includes a video / audio input / output unit 60 and a power supply block 80 for supplying power to each circuit.

The optical system 1 includes an image pickup lens 11 for condensing image pickup light from a subject, and a focus motor 12 for driving the image pickup lens 11 in a focus direction to perform a focus operation.

The camera block 20 includes a CCD (Charge Coupled Device) image sensor 2 for generating a video signal.
1 and sample hold /
The circuit includes an AGC (Auto Gain Control) circuit 22, a video A / D converter 23 for digitizing a video signal, a timing generator 24 for supplying a timing signal to each circuit, and a camera controller 25 for controlling each circuit.

The CCD image sensor 21 generates a video signal based on the imaging light incident via the imaging lens 11 and supplies the video signal to the sample hold / AGC circuit 22.
The sample hold / AGC circuit 22 controls the video signal to have a predetermined gain, and further performs waveform shaping and reset noise removal by correlated double sampling processing, and supplies the video A / D converter 23. The video A / D converter 23 digitizes the video signal at a predetermined sampling interval, and
To supply.

Here, the drive timing and sampling interval of the CCD image sensor 21, the sample hold / AGC circuit 22, and the video A / D converter 23 are controlled by a timing signal generated by a timing generator 24.

The camera controller 25 controls the above circuits to operate properly, and also controls the lens block 10 to perform an autofocus function, an automatic exposure adjustment function, and a zoom function. The camera controller 25 adjusts the rotation angle of the focus motor 12 based on, for example, predetermined autofocus information, and outputs the imaging light to be in the just focus.
The light is incident on the D image sensor 21.

The video signal processing unit 30 includes a data processing / system controller 31 for controlling input / output signals and the like,
MPEG video signal processing circuit 33 for performing compression / expansion processing of a video signal, and motion detection circuit 3 for detecting a motion vector
5, an audio compression encoder / decoder 37 for compressing / expanding audio signals, and a video controller 38 for controlling each circuit to operate properly.

When recording, the video signal processing section 30 performs compression processing on the video signal supplied from the camera block 20 and the audio signal supplied from the display / video / audio input / output section 60 to perform media compression. It is supplied to the drive unit 40.

More specifically, the data processing / system controller 31 controls the compression / expansion processing of the video signal and the audio signal, controls the input / output signals of the video signal processing unit 30, and the like. For example, the video signal from the camera block 20 is supplied to the MPEG video signal processing circuit 33 and the motion detection circuit 35.

The motion detection circuit 35 detects a motion vector using the memory 36 as a work area. The motion detection circuit 35 divides the supplied video signal into predetermined block units, and detects a motion vector indicating a change in vertical and horizontal motion of each field for each block by the number of dots. This is the MPEG video signal processing circuit 3
Supply 3 Of the motion vectors detected here,
In particular, those having a large light amount (high luminance) are used for detecting the speed of a club head described later.

The MPEG video signal processing circuit 33 uses the memory 34 as a work area, performs orthogonal transformation processing, quantization processing, and the like on the video signal, and further performs motion compensation using the motion vector to support the MPEG2 format. Compression processing of the video signal to be performed. Note that the MPEG video signal processing circuit 33 may perform video signal compression processing corresponding to the JPEG format at the time of shooting a still image, or may use an I picture in the MPEG2 format as a still image. MPEG video signal processing circuit 33
Supplies the compressed video signal to the MPEG video signal processing circuit 33.

The audio compression encoder / decoder 37
Converts an audio signal supplied via the microphone 101 and the display / video / audio input / output unit 60 into an ATRAC (Adaptive
Transform Acoustic Codin
g) Compress according to the two formats, and supply the compressed audio signal to the data processing / system controller 31. Here, in the ATRAC2 format, the time axis waveform of the digital signal at predetermined time intervals is analyzed into frequency components by Fourier transform, and the minimum audible characteristics and the masking effect are used on the frequency axis to obtain the frequency components that are important for hearing. , A process of extracting the information in order from a predetermined amount is performed.

Data processing / system controller 31
Stores the compressed video signal and audio signal in the temporary memory 32, reads out the video signal and the like from the memory 32 according to a predetermined transfer rate, and supplies it to the media drive unit 40.

On the other hand, the video controller 38 controls each circuit in the video signal processing section 30 and performs predetermined arithmetic processing. The video controller 38 calculates, for example, a distance between subjects having a large light amount using a value set by the operation unit 71, and calculates a speed based on a motion vector of a video having a large light amount. The video controller 38 may also receive, for example, a command from an external computer via the external interface 72 and the interface terminal 73.

On the other hand, at the time of reproduction, the video signal processing unit 30 performs a decompression process on the signal supplied from the media drive unit 40 to display the decompressed and restored video signal and audio signal. It is supplied to the input / output unit 60.

More specifically, the data processing / system controller 31 supplies the compressed video signal supplied from the media drive section 40 to the MPEG video signal processing circuit 33, and converts the compressed audio signal into audio data. It is supplied to the encoder / decoder 37. The MPEG video signal processing circuit 33 expands the compressed video signal and supplies it to the display / video / audio input / output unit 60 via the data processing / system controller 31. The audio compression encoder / decoder 37 expands the compressed audio signal and supplies it to the display / video / audio input / output unit 60.

The media drive section 40 includes a first encoder / decoder 41 for processing the video signal and the audio signal compressed by the video signal processing section 30 so as to correspond to the first format, an RF signal and a focus error signal. An RF amplifier 43 for generating an RF signal, a binarization circuit 44 for performing a binarization process on an RF signal, and a second encoder / decoder / servo circuit 45 for processing an audio signal so as to correspond to a second format. And a driver controller 46 for controlling each circuit in the media drive unit 40.

At the time of recording, the first encoder / decoder 41 encodes the compressed video signal and the compressed audio signal supplied from the video signal processing unit 30 in accordance with the first format, and temporarily encodes them. The data is stored in the memory 42 and read out according to a predetermined transfer rate.
To supply. The details of the first format will be described later. Further, the second encoder / decoder / servo circuit 45 encodes the audio signal supplied via the HP / LINE terminal 103 and the display / video / audio input / output unit 60 so as to correspond to the second format. And supplies it to the deck unit 50.

At the time of reproduction, the RF amplifier 43 outputs a signal based on the detection output of the laser beam from the deck unit 50.
An RF signal, a focus error signal, and a tracking error signal are generated, the RF signal is supplied to a binarization circuit 44, and the focus error signal and the tracking error signal are converted to a second signal.
To the encoder / decoder / servo circuit 45 of FIG.
The binarization circuit 44 performs a binarization process on the RF signal,
This is supplied to the first encoder / decoder 41. The first encoder / decoder 41 performs a decoding process corresponding to the first format on the video signal and the audio signal from the binarization circuit 44 and supplies the video signal and the audio signal to the video signal processing unit 30. On the other hand, the second encoder / decoder servo circuit 4
Reference numeral 5 controls focusing and tracking of the optical head 51 described later based on the focus error signal and the tracking error signal. Note that the second encoder / decoder / servo circuit 45 sends the second
When the audio signal corresponding to the format is read out, it is decoded and supplied to the display / video / audio input / output unit 60.

The deck section 50 includes an optical head 51 for recording / reproducing data on / from the optical disk 100 and an optical disk 1
And a sled motor 5 for moving the optical head 51 to a predetermined position.
3 and a magnetic head 54 for applying a predetermined magnetic field to the optical disc 100 during data recording.

The optical head 51 outputs a high-level laser beam for heating the recording track of the optical disk 100 to the Curie temperature during recording, and outputs a low-level laser beam for detecting reflected light of the optical disk 100 by the magnetic Kerr effect during reproduction. Is output. Further, a magnetic head 54 is disposed at a position opposing the optical head 51 with the optical disc 100 interposed therebetween. The magnetic head 54 applies a magnetic field modulated according to data to be recorded at the time of recording to the optical disc 100.

The optical head 51 and the magnetic head 54
Can be moved in a direction perpendicular to the recording track by a thread mechanism (not shown).
It is arranged at a predetermined position by the rotation of No. 3.

Here, data from the first encoder / decoder 41 or the second encoder / decoder / servo circuit 45 is recorded on the optical disc 100 in different formats. The first format is
This is for performing high-density recording suitable for recording a video signal and an audio signal, and the second format relates to recording of an audio signal that has been conventionally performed.

On the data recording surface of the optical disc 100 corresponding to the first format, as shown in FIG. 2, a wobbled groove WG provided with wobbles (meandering) is provided.
And a non-wobbled groove NWG to which no wobble is given, is formed in advance. The wobbled groove WG and the non-wobbled groove NWG are formed in a double spiral shape with the land Ld interposed therebetween.

FIG. 3 shows an enlarged portion surrounded by a broken line A in FIG. FIG. 3A is a cross-sectional view of the optical disc 100, and FIG. 3B is a plan view of the data recording surface side of the optical disc 100.

The track Tr · A is a track in which the wobbled groove WG is located on the outer peripheral side of the disk and the non-wobbled groove NWG is located on the inner peripheral side of the disk.
On the other hand, the track Tr · B is a track in which the wobbled groove WG is located on the inner peripheral side of the disk and the non-wobbled groove NWG is located on the outer peripheral side of the disk.
In other words, the wobble is formed only on one side of the track Tr / A on the outer circumference side of the disk, and the wobble is formed on the track Tr / B only on one side of the inner circumference side of the disk.

In this case, the track pitch is a distance between the centers of the adjacent tracks Tr.A and Tr.B, and the track pitch is 0.95 μm as shown in FIG. 3B.

Here, the wobbled groove WG is one in which a physical address on the disk is formed based on a signal encoded by FM modulation + biphase modulation. Therefore, at the time of recording / reproduction, the physical information on the disk is extracted by demodulating the reproduction information obtained from the wobbling given to the wobbled groove WG.

The address information as the wobbled groove WG is shared by the tracks Tr.A and Tr.B. That is, the track Tr · A located on the inner periphery of the wobbled groove WG and the track Tr · B located on the outer periphery share address information by wobbling given to the wobbled groove WG. Such an addressing method is called an interlace addressing method. By adopting this interlace addressing method, for example, it is possible to reduce the track pitch while suppressing crosstalk between adjacent wobbles. Also, a method of recording an address by forming a wobble in a groove is referred to as ADIP (Address In Pregroov).
e) Method.

Next, which of the tracks Tr.A and Tr.B sharing the same address information is being traced is identified as follows.

Here, a three-beam system is used. For example, when the main beam traces a track (land Ld), the remaining two side beams trace grooves located on both sides of the land Ld.

FIG. 3B shows the main beam spot S
This shows a state where Pm is tracing the track Tr · A. In this case, two side beam spots SPs
1 and SPs2, the inner side beam spot S
Ps1 traces the non-wobbled groove NWG,
The outer side beam spot SPs2 traces the wobbled groove WG.

On the other hand, although not shown, when the main beam spot SPm is tracing the tracks Tr and B, the side beam spot SPs1 traces the wobbled groove WG, and the side beam spot SPs2 is non-traced. The wobbled groove NWG will be traced.

As described above, the main beam spot SPm
Traces the track TrA or tracks TrB
Is traced, the side beam spots SPs1, Ss
The groove traced by Ps2 is switched to wobbled groove WG or non-wobbled groove NWG.

Side beam spots SPs1, SPs2
The detection signal obtained by the reflection has a different waveform depending on which of the wobbled groove WG and the non-wobbled groove NWG is being traced. Therefore,
Based on the waveform of the detection signal, it can be determined whether any of the side beam spots SPs1 and SPs2 is currently tracing the wobbled groove WG (or the non-wobbled groove NWG). As a result,
It is possible to identify which of the tracks Tr.A and Tr.B the main beam traces.

FIG. 4 is a diagram showing the main specifications of the first format having the above-mentioned track structure in comparison with the second format.

First, in the second format, the track pitch is 1.6 μm and the bit length is 0.59 μm / bit. The laser wavelength λ is 780 nm, and the aperture ratio NA of the optical head is 0.45. The recording method employs a groove recording method. That is, at the time of recording / reproduction, the groove is used as a track. The address method is a method of forming a groove (track) by a single spiral and using a wobbled groove in which wobbles as address information are formed on both sides of the groove. The modulation method of the recording data is EFM (8-
14 conversion). The error correction method is ACIRC (Advanced Cross In).
Terreave Reed-Solomon Cod
e) is adopted, and a convolution type is adopted for data interleaving. Therefore, the data redundancy is 4
6.3%. The disk drive method is CLV (Cons
Tant Linear Velocity) is adopted, and the linear velocity is 1.2 m / s. The standard data rate during recording / reproduction is 133 kB / s, and the recording capacity is 140 MB.

On the other hand, in the first format, the track pitch is 0.95 μm and the bit length is 0.39 μm
/ Bit, both of which are shorter than the second format. Then, in order to realize the above-mentioned bit length, the laser wavelength λ = 650 nm and the aperture ratio NA of the optical head =
At 0.52, the beam spot diameter at the in-focus position is reduced, and the band as an optical system is expanded. As described above, the land recording method is adopted as the recording method, and the interlace addressing method is used as the address method. The modulation method of the recording data is R
LL (1, 7) system (RLL; Run Length)
Limited) and the error correction method is RS-PC
The method and data interleave are block complete types. Then, as a result of adopting each of the above methods, data redundancy is suppressed to 19.7%. The disk drive system adopts CLV, its linear velocity is 2.0 m / s,
The standard data rate for recording / reproducing is 589 kB / s. The recording capacity is 650 MB, and high-density recording that is slightly more than four times as high as that of the second format is possible.

For example, when recording a moving image according to the first format, the moving image
When the compression encoding by G2 is performed, it is possible to record a moving image of 15 minutes to 17 minutes in time, depending on the bit rate of the encoded data. When only audio signal data is recorded, if audio data is subjected to compression processing by ATRAC2, recording can be performed for about 10 hours.

On the other hand, the display / video / audio input / output unit 60
A video D / A converter 61 for converting a video signal from the video signal processing unit 30 into an analog signal; a display controller 62 for controlling display of the LCD 102; a composite signal processing circuit 63 for outputting a composite signal;
An A / D converter 64 for digitizing the audio signal input at 1 and an A / D converter for converting the audio signal decoded by the second encoder / decoder / servo circuit 45 into an analog signal.
And a D / D / A converter 65.

Since the video signal supplied from the data processing / system controller 31 is a component signal consisting of a luminance signal Y and a color difference signal C, the video D / A converter 61 digitizes these signals and displays them in the display controller. 62 and a composite signal processing circuit 63. The display controller 62 causes the LCD 102 to display an image based on the luminance signal Y and the color difference signal C. The composite signal processing circuit 63
Outputs a composite signal from the luminance signal Y and the color difference signal C, that is, a video signal in which these are combined.
On the other hand, the A / D converter 64 digitizes the audio signal from the microphone 101 and supplies it to the audio compression encoder / decoder 37. The A / D-D / A converter 6
Numeral 5 digitizes the audio signal supplied via the HP / LINE terminal 103 at the time of recording and supplies it to the second encoder / decoder / servo circuit 45.
The audio signal from the encoder / decoder / servo circuit 45 is converted into an analog signal and supplied to the speaker 104 and the HP / LINE terminal 103.

Next, as an example of measuring the movement of a subject using the video camera device 1, measuring the swing speed of a golf club of a user will be described. Here, the speed of the club head is measured.

First, as shown in FIG. 5, a light reflecting seal 91 is attached to the tip of the head of the golf club. The light reflecting seal 91 is a direction orthogonal to the swing direction, and is made visible from the front of the golfer when the golfer holds the golf club. This light reflection seal 91
Is formed by applying a reflector made of small glass balls. Therefore, when the light reflecting seal 91 is viewed from a cross section, as shown in FIGS. 6A and 6B, the light that is vertically incident on the light reflecting seal 91 is vertically reflected, and Light incident at a predetermined angle with respect to the light is reflected in that direction.

Then, as shown in FIG. 7, two reflectors 92 are placed on the ground at a predetermined interval (= r [m]). The light reflecting surfaces of the two reflectors 92 are installed in the same direction, and are oriented in a direction orthogonal to a straight line passing through the two reflectors 92. Note that the golf swing is performed on the opposite side to the direction of the light reflecting surface and parallel to a straight line passing through the two reflecting plates 92. Then, the golf ball is placed between the two reflectors 92 on the opposite side of the direction of the light reflecting surfaces.

As shown in FIG. 8, the video camera device 1 is installed on the reflection surface side of two reflection plates 92. As a result, the video camera device 1 faces the two reflectors 92 and is arranged in front of the person performing the golf swing.

Next, a person (subject) performing a golf swing is illuminated to start shooting. In addition to the normal lighting, a flash synchronized with the field may flash on the subject.

When the photographing is started, the CCD image sensor 21 generates a video signal corresponding to the image pickup light of the subject and supplies the video signal to the video signal processing unit 30 via the sample hold / AGC circuit 22 and the like.

In the video signal processing section 30, the motion detecting circuit 35 detects the motion of the club head for each field as shown in FIG. 9 based on the reflected light from the reflective seal 91 in the video signal. Here, as shown in FIG. 10, the motion detection circuit 35 sets the light reflecting seal 91 of the golf head to the point (t−2) and the point (t−) for each field.
1), points t, points (t + 1), points (t + 2),..., And motion vectors Vct (−1), Vc between the points.
t (0), Vct (1), Vct (2),... The motion vector indicates where a certain portion of the screen is located in the next field in dot units of the CCD image sensor 21. For example, the vertical and horizontal directions when the golf head moves between points are indicated. Indicates the number of dots in the direction.

The video controller 38 calculates the speed V (n) of the golf head between the points based on the motion vector Vct (n) detected by the motion detection circuit 35. Here, a case where the speed V (-1) between the point (t-2) and the point (t-1) is calculated based on Vct (-1) will be described as an example.

First, the video controller 38 determines the distance between the point (t-2) and the point (t-1), ie, | Vct
(-1) | is calculated.

Here, the distance between the dots of the CCD image sensor 21 differs vertically and horizontally. That is,
The dots of the CCD image sensor 21 are not square.
Therefore, as shown in FIG.
The distance between dots in the vertical direction is Y _SIZE , the distance between dots in the horizontal direction is X _SIZE , and, as shown in FIG.
X represents the number of dots in the horizontal direction of the motion vector, and V represents the motion vector.
Assuming that the number of dots in the vertical direction of ct (n) is Y, | Vct
The value of (n) | is as shown in equation (1).

[0065]

(Equation 1)

The video controller 38 has a CCD
Two reflectors 9 photographed by image sensor 21
2 is also calculated. Here, assuming that the number of dots in the horizontal direction of one reflector 92 and the other reflector 92 is X _R and the number of dots in the vertical direction is Y _R , the video controller 38 performs the calculation of Expression (2).

[0067]

(Equation 2)

The two reflectors 92 may be set in parallel with the ground, and Y _R = 0.

Further, in order to make it easy to distinguish the reflected light from the reflection plate 92 from natural light (noise), it is preferable to use a color that is rarely used in the reflection plate 92 in the natural world. For example, the reflection plate 92
A red filter or a red glass ball may be used.
Correspondingly, the data processing / system controller 3
1 performs a process of generating a chroma signal in which red is extracted from a video signal. This makes it possible to more reliably specify the light from the reflector 92 as compared with a case where the light from the reflector 92 is specified only by the luminous intensity. Speed can be measured.

Next, the video controller 38 performs the operation of the equation (3) to obtain the speed V (-1).

[0071]

(Equation 3)

Here, R indicates the distance between the two reflectors 92 actually installed on the ground, and is set in advance by the user in the video camera device 1. F indicates the number of fields in one second, that is, the field frequency 60.

The video controller 38 performs the above-described processing to obtain the points (t-2) and (t-1).
And the club head speed V (-1) can be calculated. Similarly, speed V (0) between point (t-1) and point (t), speed V (1) between point (t) and point (t + 1), point (t + 1) and point (t + 2) Speed V during
(2) ... can be calculated. Thus, not only the instantaneous speed of the subject but also the speed of the subject can be continuously measured.

The video signal of the golfer who is the subject and the data of the speed of the golf swing are supplied to the deck unit 50 via the media drive unit 40. Thus, not only the golfer's video but also the golf swing speed is recorded on the optical disc 100. The data of the maximum speed of the golf head may be recorded on the optical disc 100, or the speed of each field of the golf head may be recorded. Therefore, the optical disk 1
When reproducing the video signal recorded at 00, not only the video of the golfer but also the speed of the golf swing can be displayed.

Further, since the reflector 92 is provided in a place where the golf swing is not obstructed, and the light reflecting seal 91 is affixed to the club head, the speed can be measured following the obstruction of the movement of the subject. .

The video controller 38 controls the speed V
It is not necessary to calculate the distance | r | between the two reflectors 92 each time (n), V (n + 1)... Are obtained. For example, | r | It may be read every time n is calculated.

Next, a schematic configuration of the video camera device 1 capable of displaying an on-screen display (OSD) as an auxiliary display other than the image of the subject will be described. Note that the same circuits as those described above are denoted by the same reference numerals, and detailed description will be omitted.

As shown in FIG. 13, the video camera apparatus 1 has a recording OSD / RAM 111 for generating an OSD to be recorded with a video, a recording terminal for recording (recording), and a reproducing terminal for reproduction. A switching circuit 112 set to a terminal and a display OSD / RAM 113 for generating an OSD to be displayed on the LCD 102 are provided. Note that M
PEG2 decoder 33a and MPEG2 encoder 33b
Corresponds to the above-described MPEG video signal processing circuit 33. It is assumed that the MPEG2 decoder 33a includes a motion detection circuit 35.

At the time of recording, the CCD image sensor 2
1 is an MPE which outputs the video signal of the subject via an adder 110
G2 encoder 33a and switching circuit 11
The video signal is also supplied to the adder 114 via 2 and to the video controller 38. The video controller 38 displays a predetermined OSD on the recording OSD / RAM 111 and the display OSD / RAM 113.

As shown in FIG. 14, the display OSD / RAM 113 is a circle centered on the center of the display screen and indicates a passing area of the club head having a predetermined width.
D is generated and supplied to the adder 114. Adder 1
Reference numeral 14 denotes a video signal from the CCD image sensor 21 and O
The SD is synthesized and supplied to the LCD 102. Therefore, as shown in FIG.
It is possible to make the club head position at the time of the swing coincide with the passing area in consideration of the swing trajectory guide, the guide of the head position, the guide of the position of the person, the guide of the reflector position, etc. The installation place of the video camera device 1 can be determined. Then, after the start of shooting, if the passing display area is used as a motion vector detection area, the motion detection circuit 35 does not need to search for the club head from the entire screen to detect the motion vector. Detection can be performed. That is, the speed of the subject can be calculated more quickly.

Similarly, the OSD / RAM 111 for recording is
SD is generated and supplied to the adder 110. Adder 110
Synthesizes the OSD and the video signal and supplies it to the MPEG2 decoder 33a. The MPEG2 decoder 33a
The OSD is compressed together with the video signal and supplied to the media drive unit 40 and the deck unit 50.

[0082] The video controller 38 selects the V (n _max) from among V calculated for each field (n) indicates the maximum value of the swing, as shown in FIG. 16, the V (n _max OSD for recording to display the value of
The RAM 111 and the display OSD / RAM 113 may be controlled. Thereby, not only the image of the golf swing but also the maximum speed of the swing can be recorded.
At this time, not only the maximum swing value V (n _max ) but also an indication code such as an arrow for indicating the section having the maximum swing value may be displayed as shown in FIG. 17, for example. Thereby, the user can recognize the position of the top speed of the club head.

Further, the video controller 38 is adapted to
As shown in FIG. 8, the recording O is displayed so that the passing display area is displayed in different colors according to the swing speed V (n).
The SD / RAM 111 and the display OSD / RAM 113 may be controlled. For example, the swing speed may be displayed separately at 8 m or more per second, 6 m to 8 m per second, 4 m to 6 m per second, and 3 m to 4 m per second. This allows the user to recognize the overall speed of the swing at a glance.

The present invention is not limited to the above embodiment. For example, instead of detecting a motion vector for each field, a motion vector may be detected for each frame. At this time, the MPEG video signal processing circuit 33 performs compression / expansion processing of the video signal for each frame.

In the above-described embodiment, the case where the speed of the golf head is measured has been described as an example. However, the light reflecting seal 91 is attached to the subject whose speed is to be measured, and the predetermined reflecting plate 92 is attached. By installing, various speeds such as a baseball bat swing speed and a tennis racket swing speed can be measured.

[0086]

As described in detail above, according to the imaging apparatus of the present invention, a motion vector of a subject is detected based on a video signal, and the video signal is compressed based on the motion vector. At the same time, by calculating the speed of the subject based on the motion vector of the video signal having a large light amount among the detected motion vectors, the moving speed of the subject can be easily measured while photographing the subject.

Further, according to the imaging apparatus of the present invention, a motion vector of a subject is detected based on a video signal, and the video signal is compressed based on the motion vector. The speed of the subject is calculated based on the motion vector of the video signal having a large amount of light, and the video signal and the speed of the subject are recorded on a recording medium, so that the video signal recorded on the recording medium is reproduced. In addition to the video, the speed of the subject can be reproduced.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a specific configuration of a video camera device to which the present invention has been applied.

FIG. 2 is a diagram showing a configuration of an optical disc 100 corresponding to a first format of the video camera device.

FIG. 3 is an enlarged view of a main part of the optical disc.

FIG. 4 is a diagram comparing a first format and a second format.

FIG. 5 is a diagram illustrating a position of a light reflecting seal to be attached to a club head.

FIG. 6 is a sectional view of the light reflecting seal.

FIG. 7 is a diagram illustrating a pair of reflectors.

FIG. 8 is a diagram illustrating an installation location of the video camera device.

FIG. 9 is a diagram illustrating the position of a golf head detected by the motion detection circuit of the video camera device for each field.

FIG. 10 is a diagram illustrating a motion vector for each field.

FIG. 11 is a diagram illustrating the distance between dots in the vertical direction and the distance between dots in the horizontal direction of the CCD image sensor.

FIG. 12 is a diagram illustrating the number of horizontal dots and the number of vertical dots of a motion vector detected by the motion detection circuit.

FIG. 13 is a block diagram illustrating a schematic configuration of a video camera device when an on-screen display is displayed on a monitor screen or the like.

FIG. 14 is a diagram showing an OSD indicating a passing area of a club head where a display OSD / RAM is generated.

FIG. 15 is an explanatory diagram when the position of the club head at the time of the swing is made to coincide with the passing area in consideration of the guide of the swing trajectory, the guide of the head position, the guide of the position of the reflector, and the like. .

FIG. 16 is a diagram when a maximum speed of a golf swing is displayed on an LCD which is a monitor screen.

FIG. 17 is a diagram when an arrow indicating the maximum speed of the swing and the section where the maximum value is reached is displayed on the LCD.

FIG. 18 is a diagram when the passing display area is displayed in different colors on the LCD according to a swing speed V;

FIG. 19 is an explanatory diagram when measuring the speed of a golf club by a conventional measuring method.

[Explanation of symbols]

1 video camera device, 21 CCD image sensor,
31 data processing / system controller, 33 MP
EG video signal processing circuit, 35 motion detection circuit, 38
Video controller, 51 optical head, 54 magnetic head

Claims (6)

[Claims] An imaging unit that outputs a video signal based on imaging light of the subject; a motion vector detection unit that detects a motion vector of the subject based on the video signal; and the video based on the detected motion vector. Compression means for performing signal compression processing; calculation means for calculating the speed of the subject based on the motion vector of the video signal having a large light amount among the detected motion vectors; and video signal subjected to the compression processing. An output unit that converts the speed into a predetermined format and outputs the converted format. 2. A display means for displaying an image of a subject based on a video signal from said image pickup means, and auxiliary display information for displaying an auxiliary display other than said image superimposed on an image displayed on said display means. And auxiliary display information generating means for generating auxiliary display information for displaying an auxiliary display indicating a suitable position of the subject on the display means. The imaging device according to claim 1. 3. The calculating means calculates a speed of the subject based on a motion vector detected from a video signal of the subject corresponding to the auxiliary display, and the auxiliary display information generating means calculates the speed of the calculated subject. 3. The imaging apparatus according to claim 2, wherein auxiliary display information indicating the speed of the image is generated. 4. The imaging apparatus according to claim 3, wherein said auxiliary display information generating means generates auxiliary display information indicating a maximum value of the speed calculated by said calculating means. 5. The apparatus according to claim 1, wherein said auxiliary display information generating means generates auxiliary display information for displaying the movement of the subject in different colors in accordance with the speed of the subject calculated by said calculating means. 3. The imaging device according to 3. 6. An imaging unit for outputting a video signal based on imaging light of a subject, a motion vector detection unit for detecting a motion vector of the subject based on the imaging signal, and the video based on the detected motion vector. Compression means for performing signal compression processing; calculation means for calculating the speed of the subject based on the motion vector of the video signal having a large light amount among the detected motion vectors; and video signal subjected to the compression processing. An image pickup apparatus comprising: a recording unit that records a speed and a speed on a recording medium.