Lighting system and control thereof
The invention relates to a method for controlling a lighting device to produce user customizable realistic lighting effects while compensating for rolling shutter, the method comprising: calculating a time varying lighting value based on at least one simulation parameter, said parameter comprising a user selectable camera frequency; and outputting said time varying lighting value thereby to simulate a realistic lighting effect, wherein the minimum pulse width of said time varying lighting value is determined by said camera frequency so as to avoid rolling shutter artefacts.
1. A method for controlling a lighting device to produce user customisable lighting effects while compensating for rolling shutter artefacts produced by a camera, the method comprising:
calculating, using an effect simulator, a time varying lighting value
compensating for the rolling shutter artefacts produced by the camera, the time varying lighting value being calculated based on at least one user input simulation parameter input by a user, said at least one user input simulation parameter comprising a user selectable parameter indicative of a member of a group consisting of:
a camera recording frequency of the camera,
a camera shutter speed of the camera, and
a camera frame rate of the camera; and
outputting, from said effect simulator, said calculated time varying lighting value to said lighting device thereby to simulate a lighting effect compensated for the rolling shutter artefacts.
2. The method according to claim 1 , wherein the lighting effect comprises a short time-period (e.g. stroboscopic) lighting effect with a user adjustable minimum pulse width.
3. The method according to claim 1 wherein the time varying lighting value is calculated so as to vary at a rate equivalent to at least one of: said camera recording frequency; and said camera frame rate.
4. The method according to claim 1 , further comprising matching a minimum pulse width of the time varying lighting value to a member of the group consisting of: said camera recording frequency of the camera; said camera shutter speed of the camera; and said camera frame rate of the camera.
5. The method according to claim 1 , wherein said user input of said user selectable parameter comprises a user selecting the at least one user input simulation parameter, via a user interface.
6. The method according to claim 1 , wherein the lighting effect is designed to mimic at least one of fire; lightning; police car light; television; a neon flickering sign; a candle; muzzle (gunshot); welding; spark/short circuit; a scan (e.g. fingerprint scanner); paparazzi flashes; fireworks; flashes (strobe); a propeller; a (nuclear) explosion; and a wormhole.
7. The method according to claim 1 , wherein the lighting value comprises at least one of: brightness; and colour data.
8. The method according to claim 7 , further comprising converting said at least one of: brightness; and colour data into lighting signals and outputting the lighting signal data.
9. The method according to claim 1 further comprising storing said at least one user input simulation parameter corresponding to said user customisable lighting effect.
10. The method according to claim 1 , wherein the controlling is for a lighting system for at least one of: videography, broadcast, cinematography, studio filming and location filming.
11. A controller adapted to control a lighting device to produce user customisable lighting effects while compensating for rolling shutter artefacts produced by a camera, the controller comprising:
an effect simulator adapted to calculate a time varying lighting value compensating for the rolling shutter artefacts produced by the camera based on at least one user input simulation parameter input by a user, said at least one user input simulation parameter comprising a user selectable parameter indicative of a member of a group consisting of:
a camera recording frequency of the camera;
a camera shutter speed of the camera; and
a camera frame rate of the camera; and
wherein the effect simulator is adapted to output said calculated time varying lighting value to the lighting device thereby to simulate a lighting effect compensated for rolling shutter artefacts.
12. The controller according to claim 11 , wherein the controller is adapted to control a plurality of lighting devices in dependence on the time varying lighting value.
13. The controller according to claim 11 , wherein the controller comprises an input interface adapted to receive a user input, and wherein the input interface comprises at least one of: a wireless communication interface; a dial; a slider; a display; and buttons.
14. The controller according to claim 11 , further comprising a converter adapted to convert at least one of: brightness; and colour data from the simulator into lighting signals.
15. The lighting system comprising a controller according to claim 11 and at least one lighting device; wherein said lighting device comprises at least one light emitting diode.
16. The lighting system according to claim 15 wherein said controller and said lighting device are integrated in a combined unit.
17. A computer program comprising software code for controlling a lighting device to produce user customisable lighting effects while compensating for rolling shutter artefacts produced by a camera, the computer program adapted to perform, when executed, the steps of:
calculating, using an effect simulator, a time varying lighting value compensating for the rolling shutter artefacts based on at least one user input simulation parameter input by a user, said at least one user input simulation parameter comprising a user selectable parameter indicative of a member of a group consisting of:
a camera recording frequency of the camera,
a camera shutter speed of the camera, and
a camera frame rate of the camera; and
wherein the effect simulator is adapted to output, from said effect simulator, said calculated time varying lighting value to said lighting device thereby to simulate a lighting effect compensated for rolling shutter artefacts.
18. The method according to claim 1 , further comprising controlling said time varying lighting value to illuminate evenly a camera frame.
19. The method according to claim 1 , wherein a pulse duration of said time varying lighting value is based on at least one of: said camera recording frequency; said camera shutter speed; and said camera frame rate.
20. The method according to claim 1 , further comprising controlling a minimum pulse width of said time varying lighting value based on at least one of: said camera recording frequency; said camera shutter speed; and said camera frame rate, to illuminate evenly a camera frame.
21. The method according to claim 9 further comprising recalling said at least one stored user input simulation parameter corresponding to said user customisable lighting effect.