1. A method comprising:
painting an irregular feature onto a target surface using a graphcuts operation that is constrained by at least one user input, wherein the at least one user input comprises a first user input and a second user input; and further comprising:
accepting a demarcated foreground feature of a sample texture as the first user input; and
accepting a delineated foreground region of the target surface as the second user input;
constructing a dense mesh from a target mesh such that vertices of the dense mesh correspond to pixels of an image, wherein the vertices of the dense mesh have a substantially one-to-one correspondence with the pixels of the image;
creating a work image from a work patch using at least one image chart;
building the work patch around a constrained vertex of the dense mesh based on a working patch size, the constrained vertex having a largest number of immediate vertex neighbors that are already synthesized;
synthesizing the sample texture onto a target surface associated with the target mesh responsive to the dense mesh;
performing patch matching with regard to the work image using the sample texture;
performing patch fitting with regard to the work patch using the sample texture and a graphcuts operation; and
assigning texture values to vertices of a target mesh responsive to the patch matching and the patch fitting.
2. The method as recited in claim 1, wherein the performing comprises:
patch matching with regard to the work image by translating and rotating the sample texture.
3. The method as recited in claim 1, wherein the sample texture comprises a bidirectional texture function (BTF) sample patch.
4. The method as recited in claim 1, wherein the constructing comprises:
densely sampling the target mesh using one or more multi-chart geometric image meshes (MCGIMs) in conjunction with at least one texture atlas derived from the target surface.
5. A method comprising:
painting an irregular feature onto a target surface using a graphcuts operation that is constrained by at least one user input, wherein the at least one user input comprises a first user input and a second user input; and further comprising:
accepting a demarcated foreground feature of a sample texture as the first user input; and
accepting a delineated foreground region of the target surface as the second user input;
performing patch matching by translating and rotating the sample texture to locate a position for the sample texture;
performing patch fitting by implementing a graphcuts operation with the sample texture at the located position;
assigning texture values to vertices of a target mesh responsive to the patch matching and the patch fitting;
densely resampling the target mesh to produce a dense mesh with vertices having a substantially one-to-one correspondence with pixels of at least one image;
creating a work image from a work patch using at least one image chart; and
building the work patch around a constrained vertex of the dense mesh based on a working patch size, the constrained vertex having a largest number of immediate vertex neighbors that are already synthesized.
6. The method as recited in claim 5, wherein the patch matching is performed in an image space, and the patch fitting is performed in a mesh space.
7. The method as recited in claim 5, wherein the performing patch matching comprises:
performing the matching using at least one of a number of pre-computed rotated versions of the sample texture.
8. The method as recited in claim 5, further comprising:
painting an irregular feature onto the target mesh using a graphcuts operation that involves minimizing energy corresponding to at least one user-input constraint.
9. A method comprising:
accepting a first user input demarcating a foreground feature of a texture sample;
accepting a second user input delineating a foreground region of an intermediate output texture;
performing a graphcuts operation that involves the texture sample and that is constrained by the demarcated foreground feature and the delineated foreground region;
synthesizing the demarcated foreground feature onto a target mesh to produce an updated output texture;
performing patch matching by translating and rotating the sample texture to locate a position for the sample texture;
performing patch fitting by implementing a graphcuts operation with the sample texture at the located position;
assigning texture values to vertices of a target mesh responsive to the patch matching and the patch fitting;
densely resampling the target mesh to produce a dense mesh with vertices having a substantially one-to-one correspondence with pixels of an image of a target surface associated with the target mesh;
creating a work image from a work patch using at least one image chart; and
building the work patch around a constrained vertex of the dense mesh based on a working patch size, the constrained vertex having a largest number of immediate vertex neighbors that are already synthesized.
10. The method as recited in claim 9, wherein the performing comprises:
minimizing a constraint energy, the constraint energy measuring how well a resulting synthesized texture satisfies the foreground constraints.
11. The method as recited in claim 10, wherein the performing further comprises:
minimizing a smoothness energy, the smoothness energy measuring how well a foreground feature patch fits into the intermediate output texture along a seam therebetween.
12. The method as recited in claim 10, wherein the minimizing comprises implementing an optimal swap move algorithm on pixels that are overlapped by a foreground feature patch and the intermediate output texture.
13. The method as recited in claim 9, further comprising:
synthesizing another sample texture onto the target surface to produce the intermediate output texture.
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 wind power plant where a driving shaft communicates with a synchronous generator (3) and with a transformer with a number of output windings, said transformer communicating through an ACDC rectifier with an HVDC transmission cable (9), measures being taken so as to secure against possible variations in the speed of rotation, characterised by a magnetic field controller (4) connected to the generator (3), said magnetic field controller (4) being adapted to vary the magnetic field in the synchronous generator (3) in response to a speed of rotation-depending output parameter of said generator (3) in such a manner that possible variations in the speed of rotation are compensated for, wherein the ACDC rectifier is composed of diodes.
2. A wind power plant as claimed in claim 1, characterised in that the magnetic field controller (4) is adapted to detect the currents (IG1, IG2) generated by the synchronous generator (3), a negative feedback being established for regulating the current through the rotor winding (3a).
3. A wind power plant as claimed in claim 1, characterised in that the magnetic field controller (4) is adapted to detect the voltages (IG1, IG2) generated by the synchronous generator (3), a negative feedback being established for regulating the current through the rotor winding (3a).
4. A wind power plant as claimed in claim 1, characterised in that the magnetic field controller (4) is adapted to detect the power generated by the generator (3), a negative feedback being established for regulating the current through the rotor winding (3a) in response to the detected power.
5. A wind power plant as claimed in claim 4, characterised in that the negative feedback for regulating the current through the rotor windings (3a) includes a P, I or D regulation or a combination thereof.
6. A wind power plant as claimed in claim 1, characterised in that the rotor windings are dimensioned with a relatively low inductance.
7. A wind power plant as claimed in claim 1, characterised in that the rotor is adapted to rotate at a speed of rotation high enough to further reduce the inductance.
8. A wind power plant as claimed in claim 1, characterised in that the synchronous generator (3) is multipolar.
9. A wind power plant as claimed in claim 1, where the wind turbine comprises a transformer with a number of output windings coupled in series with n an equal number of rectifiers so as to obtain an HVDC.
10. A wind power plant as claimed in claim 1 wherein the driving shaft communicates with the synchronous generator (3) through a gear (2).