WO2003034713A1 - Appareil de prise d'image d'un nageur - Google Patents

Appareil de prise d'image d'un nageur Download PDF

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Publication number
WO2003034713A1
WO2003034713A1 PCT/JP2002/010546 JP0210546W WO03034713A1 WO 2003034713 A1 WO2003034713 A1 WO 2003034713A1 JP 0210546 W JP0210546 W JP 0210546W WO 03034713 A1 WO03034713 A1 WO 03034713A1
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WO
WIPO (PCT)
Prior art keywords
swimmer
image
unit
imaging
stroke
Prior art date
Application number
PCT/JP2002/010546
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English (en)
Japanese (ja)
Inventor
Takehiro Kurono
Takahiro Murakoshi
Yuuichi Kimura
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Hamamatsu Photonics K.K.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by Hamamatsu Photonics K.K. filed Critical Hamamatsu Photonics K.K.
Priority to JP2003537303A priority Critical patent/JPWO2003034713A1/ja
Publication of WO2003034713A1 publication Critical patent/WO2003034713A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/18—Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/60—Control of cameras or camera modules

Definitions

  • the present invention relates to a swimmer imaging apparatus for imaging a swimmer's body following a swimming swimmer.
  • a mobile camera may be used to image the body of a swimmer during swimming.
  • Such mobile cameras include those that reciprocate by hanging on a wire stretched from the ceiling of the indoor pool along the course of the pool, and rails that are installed alongside the course of the pool along the pool. The one that reciprocates above is common. '' Disclosure of the invention
  • the present invention has been made in view of such circumstances, and has as its object to provide an imaging device that can accurately follow a swimmer during swimming and image the body of the swimmer. I do.
  • a swimmer imaging apparatus includes a guide extending along a course of a pool, and a body of a swimmer who reciprocates along the guide to swim.
  • Imaging means for capturing a series of image data by imaging the image at a predetermined angle with respect to the course direction, and the direction of the imaging means with respect to the guide so that the predetermined angle is constant.
  • Direction control means for controlling, zoom lens control means for controlling the zoom lens of the imaging means so that the size of the image of the swimmer's body in the acquired image data is constant, and corresponding to the body image from the image data
  • Pixel extracting means for extracting pixel data to be extracted
  • reference point position determining means for determining the reference point position of the body image in the acquired pixel data, and controlling the movement of the imaging means according to the reference point position in the image data.
  • a movement control means for controlling, zoom lens control means for controlling the zoom lens of the imaging means so that the size of the image of the swimmer's body in the acquired image data is constant, and corresponding to the body image from the image data
  • Pixel extracting means for extracting pixel data to be extracted
  • reference point position determining means for determining the reference point position of the body image in the acquired pixel data, and controlling the movement of the imaging means according to the reference point position in the image data.
  • a movement control means for controlling, zoom lens control means for controlling the zoom lens of the imaging means so that the size of
  • the angle of the imaging means with respect to the course direction of the pool and the size of the image of the body on the imaging plane of the imaging means are constant regardless of the deformation of the guide due to bending or twisting. Is done. Therefore, based on the pixel data corresponding to the body image in the image data output by the imaging unit, the reference point position of the body image on the imaging plane of the imaging unit is positioned at a predetermined position with high accuracy. Since the movement of the image pickup means is controlled in a short time, the image pickup means accurately follows the movement of the swimmer during swimming. Further, it is preferable to further include a distance calculating unit that calculates a distance from one end of the pool along the course direction of the pool to a current position of the imaging unit. By using this distance information, the control of the imaging means can be performed with higher accuracy.
  • the apparatus further includes a measurement unit that calculates a distance from one end of the pool along the course direction of the swimmer based on the distance information calculated by the distance calculation unit and the reference point position information in the image.
  • a measurement unit that calculates a distance from one end of the pool along the course direction of the swimmer based on the distance information calculated by the distance calculation unit and the reference point position information in the image.
  • a profile data creation means for creating profile data by integrating pixel data corresponding to the acquired body image along a predetermined direction; End point extraction means for extracting end points of the body image from the data, and, based on the periodic movement of the extracted end points, the end points at a predetermined posture of the swimmer as stroke points. And stroke point extracting means.
  • End point extraction means for extracting end points of the body image from the data, and, based on the periodic movement of the extracted end points, the end points at a predetermined posture of the swimmer as stroke points.
  • stroke point extracting means In all four modern swimming races (freestyle, back, breast, and butterfly), the swimmer swims periodically with each stroke. Therefore, if the end points of the body image in the image data are extracted by the above-described configuration, the movement trajectory of each end point changes periodically according to each stroke of the swimmer.
  • stroke the time required for each stroke of the swimmer (hereinafter referred to as “stroke”) Time) and the distance traveled by each stroke (hereinafter “stroke distance”) can be measured accurately and in real time.
  • the distance calculating means includes: a reflecting plate attached to the imaging means for reflecting light; an irradiating means for irradiating the reflecting plate with pulsed light from outside the guide; and a light emitted from the irradiating means and reflected by the reflecting plate It is preferable to include a light receiving unit that receives the reflected light, and a calculating unit that calculates a distance based on the elapsed time from the irradiation of the light by the irradiation unit to the reception of the reflected light by the light receiving unit. According to such a configuration, the distance between the imaging means and one end of the pool can be accurately measured irrespective of the deformation of the guide due to bending or twisting.
  • FIG. 1 is a conceptual diagram of a swimmer imaging device according to the present invention
  • FIG. 2 is a block diagram showing the configuration thereof.
  • FIG. 3 is a flowchart showing a process of creating a direction control table
  • FIG. 4 is a flowchart showing a process of creating a zoom lens control table.
  • 5A to 5D are explanatory diagrams of the integration of pixel data.
  • FIG. 6 is an explanatory diagram of the acceleration / deceleration pulse
  • FIG. 7 is an explanatory diagram of the basic pulse
  • FIG. 8 is a block diagram showing a configuration of the stroke information measuring unit.
  • FIG. 9 is a DT map showing a group of profile data.
  • FIG. 10 is a flowchart showing a stroke point extraction process.
  • FIG. 11A and FIG. 1IB are explanatory diagrams of the periodic operation profile.
  • FIGS. 12A to 12C are diagrams respectively showing a stroke time, a stroke distance, and a stroke speed.
  • distance means “distance along the course direction”.
  • FIG. 1 is a conceptual diagram of a swimmer imaging device 10 according to an embodiment of the present invention
  • FIG. 2 is a block diagram illustrating a configuration of the swimmer imaging device 10.
  • a wire 12 (guide) is provided on the ceiling of the indoor pool 100 along the course 101 of the pool 100.
  • the moving part 14 is provided on the wire 12, and the moving part 14 reciprocates along the wire 12.
  • the moving unit 14 is provided with an imaging unit 16 (imaging means) equipped with a zoom lens for imaging the body of the swimmer 150 during swimming. Image data is output from the imaging unit 16 every frame (that is, every 1/30 second), and each image data is processed at the base station 18 to calculate a stroke time, a stroke distance, and the like.
  • the imaging section 16 is provided with a reflection plate 20 that reflects light.
  • a light-emitting part 22a for irradiating pulse light toward the reflector 20 and a light-receiving part 22b for receiving and detecting the light reflected by the reflector 20 are arranged. Have been.
  • the base station 18 is provided with a distance calculation unit 22 that calculates the distance between the imaging plane of the imaging unit 16 and the start position (one end of the pool) of the swimmer.
  • the distance calculating unit 22 includes a light emitting unit 22a and a light receiving unit 22b shown in FIG. And an arithmetic control means for calculating an output signal.
  • the distance calculation unit 22 emits a light pulse from the light-emitting unit 22 a to the reflection plate 20, and after the light pulse is emitted, is reflected by the reflection plate 20 and enters the light-receiving unit 22 b.
  • the required time is measured, and the distance between the imaging surface of the imaging unit 16 and the start position is calculated based on the measured time.
  • the calculation of the distance by the distance calculation unit 22 is performed in synchronization with the output of the image data by the imaging unit 16, that is, every 1Z30 seconds.
  • the distance between the imaging plane of the imaging unit 16 and the start position can be accurately calculated without using an encoder function or the like.
  • a position detection sensor PSD
  • the moving unit 14 includes a direction control unit 24 that controls the direction of the imaging unit 16 with respect to the moving unit 14 so that the angle of the imaging unit 16 with respect to the course 101 direction of the pool 100 is constant. (Direction control means) and the zoom lens is controlled so that the size of the image of the swimmer 150 on the image plane of the imaging unit 16 (similarly in the acquired image data) is constant.
  • a zoom lens control unit 26 (zoom lens control means) is provided.
  • the direction control unit 24 creates a direction control table in advance, and controls the direction of the imaging unit 16 with respect to the moving unit 14 according to the direction control table when imaging the body of the swimmer 150.
  • the direction control table was created based on the fact that the position of the course rope that divides the course 101 of Punolle 100 was constant, and the moving part 14 was moved along the direction of the course 101 of Punolle 100. The movement is performed such that the position of the image of the course rope in each image data output by the imaging unit 16 when moving is constant.
  • FIG. 3 is a flowchart showing a process of creating a direction control table by the direction control unit 24.
  • step 74 it is determined whether or not the position of the image of the course rope is a predetermined position in the image data acquired by the imaging unit 18 (step 74).
  • This predetermined position is set as an initial value. If the position of the image of the course rope is not the predetermined position, the direction of the imaging unit 16 with respect to the moving unit 14 is controlled so as to be the predetermined position (step 76), and the process returns to step 74. If the position of the image of the course mouth is a predetermined position, the direction of the imaging unit 16 at that time is recorded (step 78).
  • step 80 it is determined whether or not the distance D is 50 meters (step 80). It should be noted that the reason why the distance is set to 50 meters is that the total length of the pool in the course direction is 50 meters. In the case of pools having different total lengths, the total length may be set to this judgment value. If the distance D has not reached 50 meters, return to step 72. Thereby, the correction of the imaging direction and the recording processing of steps S74, S76, and S78 are repeated every 5 meters. Conversely, when the distance D reaches 50 meters, the data of the direction of the imaging unit 16 recorded every 5 meters in step 78 is smoothed, and a continuous direction control table is created. (Step 82).
  • the zoom lens control unit 26 also prepares a zoom lens control table in advance, and when imaging the body of the swimmer 150, the zoom lens of the imaging unit 16 according to the zoom lens control table. Control.
  • the creation of the zoom lens control table is performed simultaneously with the creation of the above-described direction control table. Further, the zoom lens control table is created based on the fact that the interval between the course ropes of the pool 100 is constant, and the interval between the images of the course ropes in each image data output by the imaging unit 16 is uniform. It is performed to be constant. In creating the zoom lens control table, the position of the image of the course rope in each image data may be fixed.
  • FIG. 4 is a flowchart showing a process of creating a zoom lens control table by the zoom lens control unit 26.
  • Step 84 it is determined whether or not the interval between the images of the course ropes is a predetermined interval in the image data acquired by the imaging unit 18 (Step 84).
  • the predetermined interval is set as an initial value. If the interval between the images of the course ropes is not the predetermined interval, the zoom lens of the imaging unit 16 is controlled so that the interval becomes the predetermined interval (step 86), and the process returns to step 84. If the interval between images of the course is a predetermined interval, the state of the zoom lens at that time is recorded (step 88).
  • Step 80 it is determined whether or not the distance D is 50 meters (Step 80). If the distance D has not reached 50 meters, the process returns to step 72 and the control of the zoom lens and the recording of the state are repeated every 5 meters. If the distance D reaches 50 meters, the zoom lens state data recorded every 5 meters in step 88 is smoothed, and a continuous zoom lens control table is created (step 88). 90).
  • the correction table is created in advance by the direction control unit 24 and the zoom lens control unit 26, and when imaging the body of the swimmer, the control of the imaging unit 16 is performed according to the created correction table. If the direction and position of the moving part 14 change due to the deformation of the wire 12 due to bending or twisting, imaging in the course direction of the pool The angle of the unit 16 and the size of the body image on the imaging plane of the imaging unit 16 can be made constant. Therefore, it is possible to process the image data in the base station 18 without correcting the image magnification or the like of the image data output by the imaging unit 16.
  • a luminous body is provided in the moving unit 14 and the position of the luminous body is measured from the base station 18, The direction of the imaging unit 16 with respect to the moving unit 14 can be controlled according to the amount of movement.
  • the base station 18 includes a memory section 28 for receiving and storing image data output from the imaging section 16 for each frame by optical radio, and a swimmer for each of the image data stored in the memory section 28.
  • a pixel extraction unit 30 pixel extraction means for extracting pixel data corresponding to the image of the body of the subject, and a profile for generating profile data by integrating the extracted pixel data in a direction perpendicular to the course direction.
  • a data creation unit 32 profile data creation means).
  • the base station 18 includes a reference point determination unit 3 4 (reference point position determination means) for determining pixel data corresponding to the middle point of the profile data created by the profile data creation unit 32 as a reference point position.
  • a center difference calculation unit 36 that calculates a difference between pixel data corresponding to the midpoint and pixel data corresponding to the center of the visual field of the imaging plane of the imaging unit 16 in the profile data, and according to the calculated difference.
  • an acceleration / deceleration signal generator 38 for generating an acceleration signal or a deceleration signal.
  • 5A to 5D are explanatory diagrams of the integration of pixel data.
  • the pixel extraction unit 30 performs RGB ZH SV (Red, Green, Blue / Hue, Saturation, Value) conversion on all the pixel data in each image data 40, and converts them into hue values.
  • Pixel data 42 corresponding to the body image is extracted by binarizing the pixel data corresponding to the body image and other pixel data based on the binarized data. What Note that binarization may be performed based on the spectral wavelength or the luminance value.
  • the profile data creation unit 32 accumulates the pixel data 42 corresponding to the image of the body extracted by the pixel extraction unit 30 in a direction perpendicular to the course direction, and The obtained all pixel data 44 is divided into pixel data columns 46 along a direction perpendicular to the course direction, and the integrated number of pixel data constituting each pixel data column 46 is calculated. Then, as shown in FIG. 5C, each pixel data string 46 is converted into one pixel data 48 having a luminance value proportional to the integration number, and the converted pixel data
  • the reference point determination unit 34 finds the edge positions at both ends of the profile data 50 created by the profile data creation unit 32, and obtains the pixel data 48 corresponding to the midpoint. It is determined that a is a reference point serving as a position reference of the body image 42.
  • the center difference calculation unit 36 includes pixel data 48 a corresponding to the midpoint set by the reference point determination unit 34 in the profile data shown in FIG. 5C, and the imaging unit 1 in the profile data 50. The difference along the course direction from the pixel data 48b corresponding to the center of the field of view of the imaging plane 6 is calculated by the number of pixels.
  • the acceleration / deceleration signal generator 38 generates an acceleration pulse or a deceleration pulse as shown in FIG. 6 according to the difference between the number of pixels calculated by the center difference calculator 36.
  • Figure 1 For example, Figure 1
  • the moving unit 14 precedes the swimmer.
  • the acceleration / deceleration signal generator 38 generates a deceleration pulse. If the pixel data 48 a corresponding to the middle point precedes the pixel data 48 b corresponding to the center of the visual field, the swimmer is ahead of the moving part 14.
  • the acceleration / deceleration signal generator 38 generates an acceleration pulse.
  • the moving unit 14 is provided with a motor 52, and the motor 52 is driven according to a basic pulse as shown in FIG.
  • the moving section 14 reciprocates along the wire 12.
  • An acceleration pulse or a deceleration pulse is transmitted from the acceleration / deceleration generating section 38 of the base station 18 to the movement control section 54 (movement control means) to be provided in the movement section 14 by optical wireless communication.
  • Numeral 54 controls the number of rotations of the motor 52 to control the speed of the moving unit 14.
  • the image of the swimmer's body on the imaging surface of the imaging unit 16 is changed to the field of view of the imaging surface. Since the speed of the moving unit 14 is controlled to be located at the center, the effect of the angle of view can be reduced and the spatial resolution of the body image can be improved in each image data, and the equivalent space Resolution can be maintained.
  • the base station 18 includes a stroke information measuring unit 56 that calculates a stroke time, a stroke distance, and the like.
  • FIG. 8 is a block diagram showing a configuration of the stroke information measuring unit 56.
  • the stroke information measuring unit 56 arranges each profile data created by the profile data creating unit 32 to create a profile data group and creates a profile data group creating unit 58 (profile).
  • Aisle data group creation means and an end point for extracting an end point corresponding to the end of the body image (hereinafter referred to as “end point point”) on the swimmer's traveling direction side in each profile data.
  • end point point an end point corresponding to the end of the body image
  • the stroke information measuring unit 56 determines whether the swimmer has a predetermined posture in each stroke from each tip point based on the periodic change of the waveform formed in the profile data group by the extracted tip points.
  • a stroke point extraction unit 62 (stroke point extraction means) for extracting a tip point when the point becomes a stroke point, and stroke information calculation for calculating a stroke time and a stroke distance of a swimmer based on the extracted stroke points.
  • a section 64 stroke information calculation means
  • a display section 66 for displaying calculation results are provided.
  • the measurement of the stroke information according to the present invention is performed in all four modern swimming races (freestyle, knock, breast, and butterfly) in the traveling direction of the swimmer during swimming. This is based on the fact that both ends of the body that moves and the two ends of the body in the direction perpendicular to the direction of travel make periodic movements for each of the strokes. Therefore, if any of the above-mentioned end points corresponding to the end of the body image is extracted at predetermined time intervals, the waveform formed by each end point changes periodically according to each stroke. Based on each end point, the end point when the swimmer takes a predetermined posture in each stroke can be extracted as a stroke point.
  • the end point on the swimmer's traveling direction side that is, the end point is extracted as the end point corresponding to the end of the image of the body.
  • the reason for this is that the timing of the stroke is usually the timing when the head is raised most in the breast and the timing when the arm touches in other sports.
  • the profile data group creation unit 58 arranges each profile data 50 created by the profile data creation unit 32 on a DT map in which the vertical axis represents time and the horizontal axis represents distance.
  • the vertical axis is arranged in the output order of the image data.
  • pixel data 48 b corresponding to the center of the visual field of the imaging plane of the imaging unit 16 in the opening file data 50 is synchronized with the output of the image data by the distance calculation unit 22. It is arranged so as to correspond to the calculated distance.
  • FIG. 9 is a DT map showing the created profile data group 68.
  • the profile data group 68 shows that the swimmer appears from the upper left of the DT map and disappears to the lower right.
  • the end point extraction unit 60 generates an end point corresponding to the end of the body image on the swimmer's traveling direction side based on the luminance value of each pixel data 48 constituting each profile data 50, that is, Extract the tip point P. As shown in FIG. 5D, the end point extraction unit 60 extracts pixel data 48 c having the highest luminance value in the profile data 50, The pixel data 48 is searched from the extracted pixel data 48c in the swimmer's direction of travel, and the pixel data having the largest decrease in luminance value is extracted as the tip point P. Note that the tip point P may be extracted as the edge position on the traveling direction side of the swimmer in the profile data 50.
  • the stroke point extraction unit 62 sets the profile data group 68
  • FIG. 10 is a flowchart showing the process of extracting the stroke point P0 by the stroke point extracting unit 62.
  • FIGS. 11A and 11B are explanatory diagrams of the cyclic operation profile.
  • f be the number of frames processed from the start of imaging to the current time, and the average tip point in the number of frames f-n n frames before the current time in the number of frames 2 n past the current time
  • the average of the tip points is determined.
  • the average number of frames 2n is at least the stroke time, and is set to 40 frames in the present embodiment.
  • Fig. 10 Fig. 11A, and Fig. 11B
  • the average of the tip point P in the past 2 n frame numbers from the current time is calculated.
  • the average end point P, (f-n) in the number of frames f-n is calculated (step 92).
  • the periodic change of the waveform can be made more remarkable. Therefore, based on the change in the curvature of the periodic motion profile Q, the stroke point P0 can be accurately extracted.
  • the stroke information calculation unit 64 calculates a stroke time and a stroke distance based on each stroke point P0 extracted by the stroke point extraction unit 62, and causes the display unit 66 to display them.
  • the stroke information The calculation unit 64 can calculate the moving distance of the swimmer accurately from the DT map, using the front end point P as the front end position of the swimmer's body at the corresponding time in the mouth file data. Therefore, it is also possible to calculate the split time and the swimming speed between arbitrary positions of the swimmer and display them on the display unit 66.
  • the movement of the moving section 14 by driving the motor 52 according to the basic pulse the imaging of the swimmer's body by the imaging section 16 installed in the moving section 14 and the base station 18
  • the calculation of the distance between the imaging surface of the imaging unit 16 and the start position by the provided distance calculation unit 22 is started.
  • the direction control unit 24 sets the angle of the imaging unit 16 with respect to the course direction of the pool in accordance with the direction control table created in advance so that the angle of the imaging unit 16 is constant.
  • the direction of the imaging unit 16 is controlled.
  • the zoom lens control unit 26 performs zooming according to a previously created zoom lens control table so that the size of the body image on the image plane formed by the zoom lens of the imaging unit 16 is constant.
  • the lens is controlled.
  • image data from the imaging unit 16 Is output for each frame (that is, for each 1Z30), and transmitted to the memory section 28 of the base station 18 by optical radio.
  • the calculation of the distance by the distance calculation unit 22 is performed in synchronization with the output of the image data, and is transmitted to the profile data group creation unit 58 of the stroke information measurement unit 56.
  • Each image data stored in the memory unit 28 of the base station 18 is subjected to RGB ZH SV conversion of all pixel data in each image data by the pixel extraction unit 30 and the image of the body is obtained based on the hue value. Is binarized into pixel data corresponding to the image data and other pixel data, and pixel data 42 corresponding to the image of the body is extracted. The pixel data 42 corresponding to the extracted body image is integrated in the direction perpendicular to the course direction by the profile data creation unit 32, and pixel data 48 having a luminance value proportional to the number of integration is converted into one. Profile data 50 arranged in the dimension is created.
  • the edge positions at both ends of the profile data 50 are obtained by the reference point setting unit 34, and pixel data 48a corresponding to the midpoint is set.
  • the difference along the course direction between the pixel data 48 a corresponding to the midpoint of and the pixel data 48 b corresponding to the center of the field of view of the imaging plane of the imaging unit 16 is calculated by the number of pixels.
  • An acceleration pulse or a deceleration pulse is generated by the acceleration / deceleration signal generation unit 38 in accordance with the calculated difference in the number of pixels, and is transmitted to the movement control unit 54 provided in the movement unit 14 by optical wireless.
  • the movement control unit 54 controls the number of rotations of the motor 52 of the movement unit 14 so that the image of the swimmer's body on the imaging surface of the imaging unit 16 is positioned at the center of the visual field of the imaging surface.
  • the movement of the moving unit 14 is controlled.
  • the profile data 50 created by the profile data creation unit 32 is obtained by the profile data group creation unit 58 of the stroke information measurement unit 56, where the vertical axis represents time and the horizontal axis represents distance. —
  • the data is placed on the T map, and a profile data group 68 is created. At this time, the images are arranged in the output direction of the image data in the vertical axis direction.
  • the pixel 48 b corresponding to the center of the field of view of the imaging plane of the imaging unit 16 in the profile data 50 is converted into image data by the distance calculation unit 22.
  • the distance calculation unit 22 are arranged so as to correspond to the distance calculated in synchronization with the output of.
  • the end point extraction unit 60 corresponds to the end corresponding to the end in the traveling direction of the image of the swimmer's body. A point, that is, a point P is extracted. Then, in the DT map in which the profile data group 68 is shown by the stroke point extracting unit 62, the periodic change of the waveform formed by the tip point P extracted by the end point extracting unit 60 is shown. Based on the above, the tip point P when the swimmer is in a predetermined posture in each stroke is extracted from each tip point P as a stroke point P0.
  • FIGS. 12A to 12C are diagrams respectively showing the stroke time, the stroke distance, and the stroke speed (average swimming speed in each stroke) in the male 200-meter individual medley, and FIG. This is an example.
  • point Pt1 is the time required for the start
  • points Pt2 to 4 are the time required for each turn
  • point Pd1 is the distance traveled at the start
  • points Pd2 to 4 are the turns. Indicates the distance traveled.
  • the swimmer imaging device 10 configured as described above, even if the direction and position of the moving portion 14 change due to deformation of the roller 12 due to bending or twisting, etc.
  • the angle of the imaging unit 16 with respect to the direction and the size of the body image on the imaging plane of the imaging unit 16 are constant. Therefore, based on the pixel data corresponding to the image of the body in the image data, the body on the imaging plane of the imaging unit 16 is not corrected without correcting the image magnification or the like of the image data output by the imaging unit 16.
  • the speed of the moving unit 14 can be controlled so that the image of the image is located at the center of the visual field of the imaging plane, and the imaging unit 16 can accurately follow the swimmer during swimming.
  • the tip point when the swimmer assumes a predetermined posture in each stroke can be extracted as the stroke point P0, and the stroke time and the stroke distance of the swimmer can be extracted. Can be measured accurately and in real time.
  • the present invention is also applicable to the case where the moving unit and the imaging unit move back and forth along the rails and the like. Applicable.
  • the pixel data corresponding to the midpoint of the profile data is determined by the reference point determination unit as the reference point serving as the position reference of the body image.
  • An end point corresponding to the direction side end, that is, a front end point or the like may be determined as the reference point.
  • the difference between the swimmer and the imaging unit is obtained from the difference due to the number of pixels calculated by the center difference calculation unit.
  • the distance along the course direction from the image plane can be easily calculated. Thereby, the distance and the force between the imaging surface of the imaging unit and the start position, which is calculated by the distance calculation unit, and the distance between the swimmer and the start position can also be calculated.
  • the profile data creating unit creates profile data by integrating pixel data corresponding to the image of the body in a direction perpendicular to the course direction, but integrates profile data in the course direction. May be created. Since the end points in the profile data created by integrating in the course direction also perform a periodic motion for each stroke, the end points when the swimmer takes a predetermined posture in each stroke are extracted as stroke points. Because you can. If stroke points are extracted from profile data created by integrating in both directions, more accurate stroke time and stroke distance can be obtained. It becomes possible.
  • the angle of the imaging unit with respect to the course direction of the pool, and the size of the image of the body on the imaging plane of the imaging unit, regardless of the deformation of the guide due to radius or twist. Is fixed. Therefore, based on the pixel data corresponding to the body image in the image data output by the imaging means, the reference point of the body image on the imaging plane of the imaging means is positioned at the center of the visual field of the imaging plane with high accuracy. The movement of the imaging means is controlled to be located. Therefore, the imaging means can accurately follow the swimmer during swimming and image the body of the swimmer.
  • the present invention is applied to a running water pool equipped with a fixed camera, and instead of controlling the movement of the imaging means, controlling the speed of the running water, the image of the body of the swimmer in the running water pool on the imaging plane of the imaging means. If is located at the center of the field of view of the imaging plane, it is possible to accurately and immediately measure the stroke time and the stroke distance in the flowing water pool.
  • the present invention is suitable for use as a swimmer imaging device that is installed in a training facility for a swimmer, a competition venue, and the like, and that contributes to obtaining a video of a swimmer and evaluating a swimming technique.

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  • Length Measuring Devices By Optical Means (AREA)

Abstract

Cette invention concerne un appareil (10) de prise d'image d'un nageur comprenant : une unité de prise d'image (16) qui se déplace réciproquement sur un câble s'étendant dans le sens de la nage d'une piscine et prend une image du corps du nageur selon un angle prédéfini par rapport au sens de la nage, ce qui permet d'obtenir une pluralité de données image ; une unité de commande (24) de déplacement servant à commander le déplacement de l'unité de prise d'image (16) de sorte que l'angle prédéfini soit constant ; une unité de commande (26) de lentille à foyer réglable servant à commander la lentille à foyer réglable de l'unité de prise d'image (16) de sorte que la taille de l'image du nageur soit constante sur la surface de formation d'image ; une unité d'extraction (30) de pixels servant à extraire des données pixels correspondant à l'image du nageur à partir des données image ; une unité d'évaluation (34) de point de référence servant à évaluer un point de référence comme référence de position d'une image de nageur dans les données image conformément aux données pixels extraites ; et une unité de commande (54) de vitesse servant à commander la vitesse de déplacement de l'unité de prise d'image (16) de sorte que le point de référence soit situé au centre du champ de vision sur la surface de formation d'image.
PCT/JP2002/010546 2001-10-15 2002-10-10 Appareil de prise d'image d'un nageur WO2003034713A1 (fr)

Priority Applications (1)

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JP2003537303A JPWO2003034713A1 (ja) 2001-10-15 2002-10-10 泳者撮像装置

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JP2001/316997 2001-10-15
JP2001316997 2001-10-15

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WO2003034713A1 true WO2003034713A1 (fr) 2003-04-24

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005266223A (ja) * 2004-03-18 2005-09-29 Casio Comput Co Ltd カメラ装置およびプログラム
JP2018126310A (ja) * 2017-02-08 2018-08-16 パナソニックＩｐマネジメント株式会社 泳者状態表示システムおよび泳者状態表示方法
CN110567370A (zh) * 2018-09-05 2019-12-13 天目爱视（北京）科技有限公司 一种可变焦自适应的3d信息采集方法

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6144977U (ja) * 1984-08-24 1986-03-25 松下電工株式会社 テレビジヨンカメラ付き自走式トロリ
JPH02235481A (ja) * 1989-03-08 1990-09-18 O V S:Kk プール用テレビカメラシステム
JPH07135586A (ja) * 1993-11-09 1995-05-23 Victor Co Of Japan Ltd 水中移動カメラ撮影装置
JPH07325335A (ja) * 1994-05-30 1995-12-12 Nippon Hoso Kyokai <Nhk> カメラの移動装置
JPH08317277A (ja) * 1995-05-22 1996-11-29 Kowa Kk 水中監視カメラ

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6144977U (ja) * 1984-08-24 1986-03-25 松下電工株式会社 テレビジヨンカメラ付き自走式トロリ
JPH02235481A (ja) * 1989-03-08 1990-09-18 O V S:Kk プール用テレビカメラシステム
JPH07135586A (ja) * 1993-11-09 1995-05-23 Victor Co Of Japan Ltd 水中移動カメラ撮影装置
JPH07325335A (ja) * 1994-05-30 1995-12-12 Nippon Hoso Kyokai <Nhk> カメラの移動装置
JPH08317277A (ja) * 1995-05-22 1996-11-29 Kowa Kk 水中監視カメラ

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005266223A (ja) * 2004-03-18 2005-09-29 Casio Comput Co Ltd カメラ装置およびプログラム
JP4534539B2 (ja) * 2004-03-18 2010-09-01 カシオ計算機株式会社 カメラ装置およびプログラム
JP2018126310A (ja) * 2017-02-08 2018-08-16 パナソニックＩｐマネジメント株式会社 泳者状態表示システムおよび泳者状態表示方法
US11135502B2 (en) 2017-02-08 2021-10-05 Panasonic Intellectual Property Management Co., Ltd. Player state display system and player state display method
CN110567370A (zh) * 2018-09-05 2019-12-13 天目爱视（北京）科技有限公司 一种可变焦自适应的3d信息采集方法

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