What is claimed:
1. A golf club which comprises:
a head which has a face on a front surface, a shaft attachment portion at one side and a cavity on a rear surface, said cavity having a bottom surface defined by a maximum length H1 in a top-to-sole direction and another maximum length W1 in a toe-to-heel direction; and a shaft connected to the head,
wherein the cavity is formed to satisfy an inequality: H1W10.6.
2. A golf club which comprises:
a head which has a face on a front surface, said face having a maximum length H2 in a top-to-sole direction, a shaft attachment portion at one side and a cavity on a rear surface, said cavity having a bottom surface defined by a maximum length H1 in a top-to-sole direction; and a shaft connected to the head,
wherein the cavity is formed to satisfy an inequality: 0.7H1H20.85.
3. A golf club which comprises:
a head which has a face on a front surface, a shaft attachment portion at one side and a cavity on a rear surface, said cavity having a bottom surface defined by an inner top surface, an inner lower surface and inner side surfaces; and a shaft connected to the head,
wherein the inner lower surface of said cavity is formed with an undercut configuration defined toward a sole, said undercut having a maximum depth of 7 mm or above.
4. A method for manufacturing a golf club, said golf club comprising: a face member; a head body having an aperture on a front surface for securing the face member thereto and a shaft attachment portion at one side; and a shaft connected to the head body, said method comprising the steps of:
inserting a mechanical processing unit from a front side of said head body through the aperture to process said head body; and then,
securing the face member to the aperture by means of laser beam welding or the like.
5. A method for manufacturing a golf club, said golf club comprising: a face member; a head body having an aperture on a front surface for securing the face member thereto, a cavity on a rear surface and a shaft attachment portion at one side; and a shaft connected to the head body, said method comprising the steps of:
forging a raw material to form a head prototype so that the head prototype may have a face corresponding portion and a cavity corresponding portion;
hollowing the face corresponding portion from the head prototype to provide a separate face corresponding portion and a resultant hollow portion, said separate face corresponding portion being processed to said face member;
forming the resultant hollow portion into said aperture;
forming an undercut portion on said cavity corresponding portion to thereby form said cavity; and then,
securing said face member to the aperture by means of laser beam welding or the like.
6. A method for manufacturing a golf club, said golf club comprising: a face member; a head body having an aperture on a front surface for securing the face member thereto and a shaft attachment portion at one side; and a shaft connected to the head body, said method comprising the steps of:
inserting a die from a front side of said head body through the aperture to process the said head body; and
securing the face member to the aperture by means of laser beam welding or the like.
7. A method for manufacturing a golf club according to claim 4, wherein said head body is formed by forging.
8. A method for manufacturing a golf club, said golf club comprising: a head having a face on a front surface and a shaft attachment portion at one side, said head being formed by combining a plurality of members; and a shaft connected to the head, said method comprising the steps of:
forming a protrusion on an entire or a part of a periphery of at least one of said plurality of members; and
joining the members together by welding.
9. A method for manufacturing a golf club according to claim 8, wherein said plurality of members essentially consist of: a head body formed with an aperture on a front face; and a face plate to be fitted into the aperture, said protrusion being formed on the periphery of said aperture.
10. A method for manufacturing a golf club according to claim 8, wherein said plurality of members essentially consist of: a head body formed with an aperture on a front face; and a face plate to be fitted into the aperture, said protrusion being formed on the periphery of said face plate.
11. A method for manufacturing a golf club, said golf club comprising: a head having a face on a front surface and a shaft attachment portion at one side, said head being formed by combining a plurality of members; and a shaft connected to the head, said method comprising the steps of:
forming a recessed portion on either a rear surface or a side surface of at least one of said plurality of members; and
joining the members together by welding.
12. A method for manufacturing a golf club according to claim 11, wherein said plurality of members essentially consist of: a head body formed with an aperture on a front face; and a face plate to be fitted into the aperture, said recessed portion being in a form of a beveled portion formed on the rear surface of the face plate.
13. A method for manufacturing a golf club according to claim 5, wherein said head body is formed by forging.
14. A method for manufacturing a golf club according to claim 6, wherein said head body is formed by forging.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A method for determining three-dimensional information, the method comprising:
identifying a single reference element created by a fixed pattern projected onto a three-dimensional object in each of two images, the fixed pattern including a background region, an element, and the single reference element, wherein the element and the single reference element are distinct from the background region, and wherein the single reference element is distinct from the element;
determining a correspondence between portions of the two images based on the single reference element created by the fixed pattern;
determining three-dimensional information about the three-dimensional object based on the correspondence between the portions of the two images; and
generating a three dimensional surface model using the three-dimensional information based on projection of only the fixed pattern onto the three-dimensional object.
2. The method for determining three-dimensional information of claim 1, further comprising:
projecting the fixed pattern onto the three-dimensional object.
3. The method for determining three-dimensional information of claim 2, wherein the fixed pattern comprises a stripe.
4. The method for determining three-dimensional information of claim 3, wherein the single reference element comprises a wide stripe, wherein the wide stripe is wider than the stripe.
5. The method for determining three-dimensional information of claim 1, wherein the fixed pattern further comprises a plurality of repeating elements.
6. The method for determining three-dimensional information of claim 1, wherein determining the three-dimensional information about the three-dimensional object based on the correspondence between the portions of the two images comprises:
determining a three-dimensional point cloud about the three-dimensional object based on the correspondence between the portions of the two images.
7. The method for determining three-dimensional information of claim 6, wherein determining the three-dimensional information about the three-dimensional object based on the correspondence between the portions of the two images further comprises:
determining a three-dimensional surface model of the three-dimensional object.
8. The method for determining three-dimensional information of claim 1, wherein the three-dimensional object comprises a human face.
9. The method for determining three-dimensional information of claim 1, wherein the pattern projected onto a three-dimensional object results in one or more elements having a depth discontinuity.
10. The method for determining three-dimensional information of claim 9, wherein determining the correspondence between portions of the two images based on the single reference elements comprises:
performing a disparity propagation routine that identifies depth discontinuities.
11. A system configured to determine three-dimensional information, the system comprising:
a computer processor; and
a memory communicatively coupled with and readable by the computer processor and having stored therein processor-readable instructions which, when executed by the computer processor, cause the computer processor to:
identify a single reference element created by a fixed pattern projected onto a three-dimensional object in each of two images, the fixed pattern including a background region, an element, and the single reference element, wherein the element and the single reference element are distinct from the background region, and wherein the single reference element is distinct from the element;
determine a correspondence between portions of the two images based on the single reference element created by the fixed pattern;
determine three-dimensional information about the three-dimensional object based on the correspondence between the portions of the two images; and
generate a three dimensional surface model using the three-dimensional information based on projection of only the fixed pattern onto the three-dimensional object.
12. The system for determining three-dimensional information of claim 11, further comprising:
a projector configured to project the fixed pattern onto the three-dimensional object.
13. The system for determining three-dimensional information of claim 12, wherein the projector is configured to project the fixed pattern in infrared.
14. The system for determining three-dimensional information of claim 12, wherein the fixed pattern projected by the projector comprises a stripe.
15. The system for determining three-dimensional information of claim 11, further comprising:
a first camera configured to capture a first image of the two images; and
a second camera configured to capture a second image of the two images.
16. The system for determining three-dimensional information of claim 15, wherein the first camera or the second camera comprises an infrared filter.
17. The system for determining three-dimensional information of claim 11, wherein the instructions that cause the computer processor to determine the three-dimensional information about the three-dimensional object based on the correspondence between the portions of the two images comprises processor-readable instructions that cause the computer processor to:
determine a three-dimensional point cloud about the three-dimensional object based on the correspondence between the portions of the two images.
18. The system for determining three-dimensional information of claim 11, wherein the instructions that cause the computer processor to determine the three-dimensional information about the three-dimensional object based on the correspondence between the portions of the two images comprises processor-readable instructions that cause the computer processor to:
determine a three-dimensional surface model of the three-dimensional object.
19. The system for determining three-dimensional information of claim 11, wherein the pattern projected onto a three-dimensional object results in one or more elements having a depth discontinuity.
20. The system for determining three-dimensional information of claim 19, wherein the instructions that cause the computer processor to determine the correspondence between portions of the two images based on the single reference elements comprises processor-readable instructions that cause the computer processor to:
perform a disparity propagation routine that identifies depth discontinuities of the pattern projected onto the three-dimensional object.
21. An apparatus for determining three-dimensional information, the apparatus comprising:
means for identifying a single reference element created by a fixed pattern projected onto a three-dimensional object in each of two images, the fixed pattern including a background region, an element, and the single reference element, wherein the element and the single reference element are distinct from the background region, and wherein the single reference element is distinct from the element;
means for determining a correspondence between portions of the two images based on the single reference element created by the fixed pattern;
means for determining three-dimensional information about the three-dimensional object based on the correspondence between the portions of the two images; and
means for generating a three dimensional surface model using the three-dimensional information based on projection of only the fixed pattern onto the three-dimensional object.
22. The apparatus for determining three-dimensional information of claim 21, further comprising:
means for projecting the fixed pattern in infrared onto the three-dimensional object.
23. The apparatus for determining three-dimensional information of claim 21, wherein the means for determining the three-dimensional information about the three-dimensional object based on the correspondence between the portions of the two images comprises:
means for determining a three-dimensional point cloud about the three-dimensional object based on the correspondence between the portions of the two images.
24. A non-transitory processor-readable medium for determining three-dimensional information, comprising processor-readable instructions configured to cause one or more processors to:
identify a single reference element created by a fixed pattern projected onto a three-dimensional object in each of two images, the fixed pattern including a background region, an element that is distinct from the background region, and the single reference element that is distinct from the background region and the element;
determine a correspondence between portions of the two images based on the single reference element created by the fixed pattern;
determine three-dimensional information about the three-dimensional object based on the correspondence between the portions of the two images; and
generate a three dimensional surface model using the three-dimensional information based on projection of only the fixed pattern onto the three-dimensional object.
25. The non-transitory processor-readable medium for determining three-dimensional information of claim 24, wherein the instructions that cause the computer processor to determine the three-dimensional information about the three-dimensional object based on the correspondence between the portions of the two images comprises processor-readable instructions that cause the computer processor to:
determine a three-dimensional point cloud about the three-dimensional object based on the correspondence between the portions of the two images.
26. A method for determining three-dimensional information, the method comprising:
identifying a non-repeating reference element created by a fixed pattern projected onto a three-dimensional object at a single position in each of two images, the fixed pattern being fixed relative to a light source that is projecting the fixed pattern, the fixed pattern including a first portion having a first repetitive component created by light projected from the light source and a second portion having a second repetitive component created by an absence of light projected from the light source, wherein the non-repeating reference element is distinct from the first portion and the second portion;
determining a correspondence between portions of the two images based on the non-repeating reference element created by the fixed pattern;
determining three-dimensional information about the three-dimensional object based on the correspondence between the portions of the two images; and
generating a three dimensional surface model using the three-dimensional information based on projection of only the fixed pattern onto the three-dimensional object at the single position.
27. The method for determining three-dimensional information of claim 26, wherein the non-repeating reference element comprises light projected from the light source.
28. The method for determining three-dimensional information of claim 1, wherein the element and the single reference element of the fixed pattern comprise light projected onto the object, and wherein the background region of the fixed pattern comprises an area separating the projected light.