Systems and methods for planning hair transplantation
Systems and methods for creating a treatment plan for cosmetic procedures, for example, a hair transplantation procedure, are provided. The treatment plan allows user to provide input on a proposed hair element using a free-hand drawing in a two-dimensional plane, and for the proposed hair element to be generated and displayed on a three-dimensional model of a body surface. Various techniques and methods described in the application provide for improved planning of a natural looking hair.
1. A method of planning for transplantation of follicular units in a body surface, the method comprising:
receiving one or more two-dimensional (2-D) curves;
automatically assigning at least two control points to each of the one or more curves;
automatically determining an initial orientation for each of the control points based on an angle of a tangent to the one or more curves at each respective control point; and
automatically generating, with use of a processor, proposed follicular unit implantation or harvesting sites based on the at least two control points of the one or more curves and their corresponding automatically assigned initial orientations.
2. The method of claim 1 , wherein the one or more 2-D curves comprise free-hand drawings.
3. The method of claim 1 , wherein automatically determining the initial orientation is based at least in part on one or more existing follicular units.
4. The method of claim 1 , further comprising altering the automatically determined initial orientation of the at least two control points based on a distance of each of the at least two control points from a center of a hair whorl.
5. The method of claim 1 , further comprising identifying a hair boundary and automatically generating a plurality of control points based on the hair boundary, wherein the hair boundary surrounds the one or more curves.
6. The method of claim 5 , wherein automatically generating the plurality of control points based on the hair boundary comprises utilizing polygon approximation.
7. The method of claim 5 , further comprising generating additional curves within the hair boundary.
8. The method of claim 1 , further comprising converting the one or more 2-D curves to 3-D locations by determining a point of intersection between 2-D values and a 3-D model of a body surface.
9. The method of claim 8 , wherein automatically determining the initial orientation of each control point is based at least in part on one or more features of the 3-D model.
10. The method of claim 1 , further comprising determining a center of a hair whorl based on the one or more 2-D curves and wherein automatically assigning the initial orientation to each of the control points is based on an orientation of a virtual line from the center of the whorl to each of the respective control points.
11. The method of claim 10 , wherein the hair whorl center is inside a hair boundary curve.
12. The method of claim 1 , further comprising smoothing the one or more 2-D curves to remove noise.
13. The method of claim 1 , wherein the automatically generated sites comprise follicular unit implantation sites, and the method further comprises generating and displaying proposed hair follicles or follicular units.
14. The method of claim 13 , wherein the proposed hair follicles or follicular units comprise a predetermined length which may be modified by a user.
15. A system for planning for transplantation of follicular units or hair grafts in a body surface, the system comprising:
at least one non-transitory storage medium storing instructions and one or more modules for executing operations on image data, the one or more modules comprising instructions for:
receiving one or more two-dimensional (2-D) curves;
automatically assigning at least two control points to each of the one or more curves;
automatically determining an initial orientation for each of the control points based on an angle of a tangent to the one or more curves at each respective control point; and
automatically generating proposed follicular unit implantation or harvesting sites based on the at least two control points of the one or more curves and their corresponding automatically assigned initial orientations.
16. The system of claim 15 , further comprising a user interface, including a user input device.
17. The system of claim 15 , further comprising a smoothing module to remove noise from the one or more 2-D curves.
18. The system of claim 15 , further comprising a monitor configured to display the proposed follicular unit implantation or harvesting sites.
19. The system of claim 15 , further comprising instructions to convert the one or more 2-D curves into 3-D locations on a 3-D model of a body surface.
20. The system of claim 19 , wherein the 3-D model of the body surface is generated from at least four 2-D images.