# US 5,333,061 A · Method and apparatus for producing an instructional video analyzing a golf swing > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 5,333,061 A - Document ID: US5333061A - Status: Granted - Kind: A - Application number: 07/854,093 - Filed: 1992-03-19 - Granted: 1994-07-26 - Earliest claimed: 1992-03-19 - Assignees: Midori Katayama - Inventors: Shinji Nakashima; Muneomi Katayama - Web page: https://patentgrep.com/patent/US5333061A ## CPC - A63B 24/0003: {Analysing the course of a movement or motion sequences during an exercise or trainings sequence, e.g. swing for golf or tennis} - A63B 69/00: Training appliances or apparatus for special sports (training of parachutists B64D23/00) - A63B 69/36: for golf - G11B 27/028: with computer assistance - H04N 5/265: Mixing - A63B 2024/0012: {Comparing movements or motion sequences with a registered reference} - A63B 2220/806: Video cameras - A63B 2220/807: Photo cameras - G11B 27/024: on tapes (G11B27/028, G11B27/029 take precedence) - G11B 2220/90: Tape-like record carriers - H04N 5/765: Interface circuits between an apparatus for recording and another apparatus - H04N 5/93: Regeneration of the television signal or of selected parts thereof - A63B: APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT (apparatus for passive exercising, massage A61H) - G11B: INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER (recording measured values in a way that does not require playback through a transducer G01D9/00; recording or playback apparatus using mechanically marked tape, e.g. punched paper tape, or using unit records, e.g. punched or magnetically marked cards G06K; transferring data from one type of record carrier to another G06K1/18; circuits for coupling output of reproducer to radio receiver H04B1/20; gramophone pick-ups or like acoustic electromechanical transducers or circuits therefor H04R) - H04N: PICTORIAL COMMUNICATION, e.g. TELEVISION ## Abstract A method and apparatus for producing an instructional video from a videotape of a golfer swinging a golf club. A computer still picture output section converts the video into still pictures, which are output onto a display. A correction picture output section generates video images of a desired swing motion corresponding to each of the still images. The still pictures of a golfer being analyzed are overlaid over the corrected images, which include lines depicting proper form. Additional visual and audio information can be added, and the result is recorded onto another videotape. ## Claims ### Claim 1 An apparatus for producing an instructional video from a videotape of a golfer swinging a golf club, comprising: means for converting video images from a videotape of a golfer's swing into a plurality of still images representing predetermined phases of the golfer's swing; a display screen for displaying said still images; a correction picture output section for outputting a video image corresponding to each of said still images, each said correction picture comprising an arrangement of lines, said arrangement of lines corresponding to geometric relationships between at least two reference points, wherein said at least two reference points include a first body part of said golfer and at least one of: a second body part of the golfer which is not immediately adjacent said first body part, and a part of the golf club which is not immediately adjacent said first body part; and further wherein said arrangement of lines includes one of: a straight line directly connecting said two reference points, and an ellipse having an axis defined by a spacing between aid two reference points; overlying means for overlying each of said still images over its corresponding correction picture to produce a resultant picture; and means for recording said resultant picture; wherein one of said still images is a side view of the golfer addressing a golf ball, with the corresponding correction picture including a line directly connecting a shoulder position of the golfer with a club head position. ### Claim 2 (depends on 1) The apparatus of claim 1, further comprising means for adding visual instructional information to said resultant picture. ### Claim 3 (depends on 1) The apparatus of claim 1, further comprising means for recording audio instructional information onto said videotape. ### Claim 4 (depends on 1) The apparatus of claim 1, wherein said line connecting the shoulder position of the golfer with the club head position makes an angle with a club shaft of 10 to 20 degrees. ### Claim 5 (depends on 1) The apparatus of claim 1, further comprising means for adjusting a size of each correction picture to match a size of its corresponding still image. ### Claim 6 An apparatus for producing an instructional video from a videotape of a golfer swinging a golf club, comprising: means for converting video images from a videotape of a golfer's swing into a plurality of still images representing predetermined phases of the golfer's swing; a display screen for displaying said still images; a correction picture output section for outputting a video image corresponding to each of said still images, each said correction picture comprising an arrangement of lines, said arrangement of lines corresponding to geometric relationships between at least two reference points, wherein said at least two reference points include a first body part of said golfer and at least one of: a second body part of the golfer which is not immediately adjacent said first body part, and a part of the golf club which is not immediately adjacent said first body part; and further wherein said arrangement of lines includes one of: a straight line directly connecting said two reference points, and an ellipse having an axis defined by a spacing between said two reference points; overlying means for overlying each of said still images over its corresponding correction picture to produce a resultant picture; and means for recording said resultant picture; wherein one of said still images is a side view of the golfer with a club head at a top position of a backswing, the corresponding correction picture including a first line extending directly from a golfer's gripped hands position toward a shoulder position, a swing axial line drawn substantially perpendicular to said first line, a second line extending in parallel with said swing axial line, and a third line directly connecting elbow positions of the golfer. ### Claim 7 (depends on 6) The apparatus of claim 6, further comprising a triangle having an apex defined by the golfer's gripped hands position and a base defined by the elbow positions, with the base of said triangle being parallel to a ground surface. ### Claim 8 An apparatus for producing an instructional video from a videotape of a golfer swinging a golf club, comprising: means for converting video images from a videotape of a golfer's swing into a plurality of still images representing predetermined phases of the golfer's swing; a display screen for displaying said still images; a correction picture output section for outputting a video image corresponding to each of said still images, each said correction picture comprising an arrangement of lines, said arrangement of lines corresponding to geometric relationships between at least two reference points, wherein said at least two reference points include a first body part of said golfer and at least one of: a second body part of the golfer which is not immediately adjacent said first body part, and a part of the golf club which is not immediately adjacent said first body part; and further wherein said arrangement of lines includes one of: a straight line directly connecting said two reference points, and an ellipse having an axis defined by a spacing between said two reference points; overlying means for overlying each of said still images over its corresponding correcting picture to produce a resultant picture; and means for recording said resultant picture; wherein one of said still images is a front view of the golfer with the club head at a top position of a backswing, the corresponding correction picture including an upper ellipse formed with a long axis defined by a width spacing between opposed elbow positions of the golfer, a lower ellipse displayed with a long axis defined by a spacing between opposed knee positions of the golfer, and first and second parallel lines joining said upper ellipse with said lower ellipse. ### Claim 9 (depends on 8) The apparatus of claim 8, wherein said first and second parallel lines extend perpendicularly to said ellipses, thereby forming a cylinder with a longitudinal axis extending perpendicularly to a ground surface. ### Claim 10 An apparatus for producing an instructional video from a videotape of a golfer swinging a golf club, comprising: means for converting video images from a videotape of a golfer's swing into a plurality of still images representing predetermined phases of the golfer's swing; a display screen for displaying said still images; a correction picture output section for outputting a video image corresponding to each of said still images, each said correction picture comprising an arrangement of lines, said arrangement of lines corresponding to geometric relationships between at least two reference points, wherein said at least two reference points include a first body part of said golfer and at least one of: a second body part of the golfer which is not immediately adjacent said first body part, and a part of the golf club which is not immediately adjacent said first body part; and further wherein said arrangement of lines includes one of: a straight line directly connecting said two reference points, and an ellipse having an axis defined by a spacing between said two reference points; overlying means for overlying each of said still images over its corresponding correction picture to produce a resultant picture; and means for recording said resultant picture; wherein one of said still images is a side view of the golfer impacting a golf ball with the club, the corresponding correction picture including a first line directly extending from a shoulder position to a club head position and a second line directly connecting a top end of a sirloin position of the golfer with a protruding knee position. ### Claim 11 (depends on 10) The apparatus of claim 10, wherein said first and second lines are parallel to one another. ### Claim 12 A method of analyzing a golfer's swing motion, comprising the steps of: video taping a golfer's stance and swing; converting video images of the golfer to a plurality of still images on a computer display screen; generating a correction picture corresponding to each of said still images, each said correction picture comprising an arrangement of lines, said arrangement of lines corresponding to geometric relationships between at least two reference points, with said at least two reference points including a first body part of said golfer and at least one of: a second body part of the golfer which is not immediately adjacent said first body part, and a part of a golf club which is not immediately adjacent said first body part; and further wherein said step of providing a correction picture with an arrangement of lines includes providing one of a straight line directly connecting said two reference points, and an ellipse having an axis defined by a spacing between said two reference points; overlying each of said still images over its corresponding correction picture to form a resultant picture; and recording the resultant picture; wherein one of said still images is a side view of the golfer addressing a golf ball, and wherein the correction picture corresponding to said view includes a line directly connecting a shoulder position of the golfer with a club head position. ### Claim 13 (depends on 12) The method of analyzing a golfer's swing motion according to claim 12, further comprising the step of: recording a suitable visual message onto the resultant picture. ### Claim 14 (depends on 12) The method of analyzing a golfer's swing motion according to claim 12, further comprising the step of: recording a suitable audio message onto said videotape along with the resultant picture. ### Claim 15 (depends on 12) The method of analyzing a golfer's swing motion according to claim 12, further comprising a step of adjusting a size of each of said correction pictures to match a size of its corresponding still image. ### Claim 16 A method of analyzing a golfer's swing motion, comprising the steps of: video taping a golfer's stance and swing; converting video images of the golfer to a plurality of still images on a computer display screen; generating a correction picture corresponding to each of said still images, each said correction picture comprising an arrangement of lines, said arrangement of lines corresponding to geometric relationships between at least two reference points, with said at least two reference points including a first body part of said golfer and at least one of: a second body part of the golfer which is not immediately adjacent said first body part, and a part of a golf club which is not immediately adjacent said first body part; and further wherein said step of providing a correction picture with an arrangement of lines includes providing one of a straight line directly connecting said two reference points, and an ellipse having an axis defined by a spacing between said two reference points; overlying each of said still images over its corresponding correction picture to form a resultant picture; and recording the resultant picture; wherein one of said still images is a side view of the golfer addressing a golf ball, and wherein the correction picture corresponding to said view includes a line directly connecting a shoulder position of the golfer with a club head position, further comprising the step of: determining whether or not said line forms an angle between 10 and 20 degrees with the club shaft. ### Claim 17 A method of analyzing a golfer's swing motion, comprising the steps of: video taping a golfer's stance and swing; converting video images of the golfer to a plurality of still images on a computer display screen; generating a correction picture corresponding to each of said still images, each said correction picture comprising an arrangement of lines, said arrangement of lines corresponding to geometric relationships between at least two reference points, with said at least two reference points including a first body part of said golfer and at least one of: a second body part of the golfer which is not immediately adjacent said first body part, and a part of a golf club which is not immediately adjacent said first body part; and further wherein said step of providing a correction picture with an arrangement of lines includes providing one of a straight line directly connecting said two reference points, and an ellipse having an axis defined by a spacing between said two reference points; overlying each of said still images over its corresponding correction picture to form a resultant picture; and recording the resultant picture; wherein one of said still images is a side view of the golfer with a club head at a top position of a backswing, the corresponding correction picture including a triangle having an apex defined by a golfer's hands position and a base defined by a line joining a golfer's elbow positions. ### Claim 18 A method of analyzing a golfer's swing motion, comprising the steps of: video taping a golfer's stance and swing; converting video images of the golfer to a plurality of still images on a computer display screen; generating a correction picture corresponding to each of said still images, each said correction picture comprising an arrangement of lines, said arrangement of lines corresponding to geometric relationships between at least two reference points, with said at least two reference points including a first body part of said golfer and at least one of: a second body part of the golfer which is not immediately adjacent said first body part, and part of a golf club which is not immediately adjacent said first body part; and further wherein said step of providing a correction picture with an arrangement of lines includes providing one of a straight line directly connecting said two reference points, and an ellipse having an axis defined by a spacing between said two reference points; overlying each of said still images over its corresponding correction picture to form a resultant picture; and recording the resultant picture; wherein one of said still images is a front view of the golfer with a club head at a top position of a backswing, said corresponding correction picture including an upper ellipse formed with a long axis defined by a width spacing between opposed elbow positions of the golfer, a lower ellipse displayed with a long axis defined by a spacing between opposed knee positions of the golfer, and first and second parallel lines joining said upper ellipse with said lower ellipse. ### Claim 19 A method of analyzing a golfer's swing motion, comprising the steps of: video taping a golfer's stance and swing; converting video images of the golfer to a plurality of still images on a computer display screen; generating a correction picture corresponding to each of said still images, each said correction picture comprising an arrangement of lines, said arrangement of lines corresponding to geometric relationships between at least two reference points, with said at least two reference points including a first body part of said golfer and at least one of: a second body part of the golfer which is not immediately adjacent said first body part, and a part of a golf club which is not immediately adjacent said first body part; and further wherein said step of providing a correction picture with an arrangement of lines includes providing one of a straight line directly connecting said two reference points, and an ellipse having an axis defined by a spacing between said two reference points; overlying each of said still images over its corresponding correction picture to form a resultant picture; and recording the resultant picture; wherein one of said still images is a side view of the golfer impacting a golf ball with a club, the corresponding correction picture including a first line directly extending from a shoulder position to a club head position and a second line directly connecting a top end of a sirloin position of the golfer with a protruding knee position. ### Claim 20 An apparatus for producing an instructional video from a videotape of a golfer swinging a golf club, comprising: means for converting video images from a videotape of a golfer's swing into a plurality of still images representing predetermined phases of the golfer's swing; a display screen for displaying said still images; a correction picture output section for outputting a video image corresponding to each of said still images, each said correction picture comprising an arrangement of lines; overlying means for overlying each of said still images over its corresponding correction picture to produce a resultant picture; and means for recording said resultant picture; wherein said arrangement of lines includes: (a) a line directly connecting a shoulder position of the golfer with a club head position; (b) a first line extending directly from a golfer's gripped hands position to a first elbow position, a second line extending directly from the gripped hands position to a second elbow position, and a third line directly connecting said first and second elbow positions of the golfer; (c) an upper ellipse formed with a long axis defined by a width spacing between opposed elbow positions of the golfer, and a lower ellipse displayed with a long axis defined by a spacing between opposed knee positions of the golfer, and first and second parallel lines joining said upper ellipse with said lower ellipse; and (d) a fourth line directly extending from a left shoulder position to the club head position and a fifth line directly connecting a top end of a sirloin position of the golfer with a protruding knee position.