Relating to image projecting

• US 20070242233A1
• Filed: 04/13/2006
• Published: 10/18/2007
• Est. Priority Date: 04/13/2006
• Status: Active Grant

• Current Assignee: Nokia Corporation
• Original Assignee: Nokia Corporation
• Inventors: Kuusilinna, Kimmo, Sokeila, Tomi, Launiainen, Aki, Pesonen, Mika, Leppanen, Tapani
• Granted Patent: US 7,717,569 B2
• Time in Patent Office: Days
• US Class Current: 353/69
• CPC Class Codes: G03B 21/26 Projecting separately subsidiary matter simultaneously with main image
• CPC Class Codes: H04N 9/3185 Geometric adjustment, e.g. keystone or convergence optical or mechanical adjustment of convergence H04N9/317; using scanning means H04N3/22; optical or mechanical adjustments of projectors not peculiar to the presence of an electronic spatial light modulator G03B21/14

Abstract

A projector screen is shown comprising one or more markers arranged to be used by projection processing circuitry to calculate a user perceived distortion in an image to be projected on the projector screen. A related method, computer program and projection processing circuitry are also shown.

Claims

1. A projector screen, the projector screen comprising one or more markers arranged to be used by projection processing circuitry to calculate a user perceived distortion in an image to be projected on the projector screen.

2. A projector screen as claimed in claim 1, wherein the one or more markers are arranged to be used by projection processing circuitry to calculate a user perceived distortion in an image projected on the projector screen.

3. A projector screen as claimed in claim 1, wherein the one or more markers comprise light emitting markers.

4. A projector screen as claimed in claim 1, wherein the one or more markers comprise light emitting markers, the light emitting markers having a light emitting state and a non-light emitting state, and where the light emitting state is provided by an energy source.

5. A projector screen as claimed in claim 1, wherein the one or more markers comprise light emitting markers, the light emitting markers having a light emitting state and a non-light emitting state, and where the light emitting state is provided by an integral energy source.

6. A projector screen as claimed in claim 1, wherein the one or more markers comprise light emitting markers, the light emitting markers having a light emitting state and a non-light emitting state, the projector screen comprising user interface circuitry to move the one or more markers into the light emitting state from the non-light emitting state.

7. A projector screen as claimed in claim 1, wherein the one or more markers comprise light emitting markers, the light emitting markers having a light emitting state and a non-light emitting state, the projector screen comprising user interface circuitry to receive a signal command to move the one or more markers into the light emitting state from the non-light emitting state, the user interface circuitry being arranged to receive the signal command from a user interface element located on the screen.

8. A projector screen as claimed in claim 1, wherein the one or more markers comprise light emitting markers, the light emitting markers having a light emitting state and a non-light emitting state, the projector screen comprising user interface circuitry to receive a signal command to move the one or more markers into the light emitting state from the non-light emitting state, the user interface circuitry being arranged to receive the signal command from a remote source.

9. A projector screen as claimed in claim 1, wherein the one or more markers comprise light emitting markers, the light emitting markers having a light emitting state and a non-light emitting state, the projector screen comprising user interface circuitry to receive a signal command to move the one or more markers into the light emitting state from the non-light emitting state, the user interface circuitry being arranged to receive the signal command from a remote control source, the signal command being transmitted from the remote control source to the user interface circuitry under the initiation of a user.

10. A projector screen as claimed in claim 1, wherein the one or more markers comprise light emitting markers, the light emitting markers having a light emitting state and a non-light emitting state, the projector screen comprising user interface circuitry to receive a signal command to move the one or more markers into the light emitting state from the non-light emitting state, the user interface circuitry being arranged to receive the signal command from a remote control source, the signal command being transmitted from the remote control source to the user interface circuitry without the initiation of a user.

11. A projector screen as claimed in claim 1, wherein the one or more markers comprise light emitting markers, the light emitting markers having a light emitting state and a non-light emitting state, the projector screen comprising user interface circuitry to receive a signal command to move the one or more markers into the light emitting state from the non-light emitting state, the user interface circuitry being arranged to receive the signal command from a remote control source, the signal command being transmitted from the remote control source to the user interface circuitry over an air interface.

12. A projector screen as claimed in claim 1, wherein the one or more markers comprise light emitting markers, the light emitting markers having a light emitting state and a non-light emitting state, the projector screen being arranged to move the one or more markers into the light emitting state from the non-light emitting state at predetermined intervals.

13. A projector screen as claimed in claim 1, wherein the one or more markers comprise light emitting markers arranged to emit light in the non-visual spectrum.

14. A projector screen as claimed in claim 1, wherein the one or more markers comprise light emitting markers arranged to emit light in the visual spectrum.

15. A projector screen as claimed in claim 1, wherein the one or more markers comprise light emitting markers arranged to emit light in the visual spectrum, and wherein the markers comprise fluorescent material.

16. A projector screen as claimed in claim 1, wherein the one or more markers comprise light emitting markers arranged to emit light in the visual spectrum, and wherein the markers comprise a fluorescent paint applied to the surface of the projector screen.

17. A projector screen as claimed in claim 1, wherein one or more of the markers are of a colour distinct from the colour of the projection viewing area.

18. A projector screen as claimed in claim 1, wherein one or more of the markers are positioned around the projection viewing area of the screen.

19. A projector screen as claimed in claim 1, wherein one or more markers are positioned around the projection viewing area to form a frame around the projection viewing area.

20. A projector screen as claimed in claim 1, wherein the projector screen is portable.

21. A projector screen as claimed in claim 1, wherein the projector screen comprises a projection viewing area made from a foldable material.

22. A projector screen as claimed in claim 1, wherein the projector screen comprises a projection viewing area made from a foldable parachute-based material.

23. Projector screen user interface circuitry arranged to control the activation of one or more projector screen light emitting markers, the light emitting markers having a light emitting state and a non-light emitting state and being arranged to be used by projection processing circuitry to calculate a user perceived distortion in an image to be projected on the projector screen when one or more of the markers are in a light emitting state, the projector screen user interface circuitry being arranged to receive a signal command to move the one or more markers into the light emitting state from the non-light emitting state.

54. Apparatus comprising the circuitry according to claim 23.

24. A portable projector screen, the projector screen comprising a projection viewing area, and wherein the projection viewing area is made from a foldable material.

25. A screen as claimed in claim 24, wherein the foldable material has similar foldable properties to parachute material.

26. A projector screen as claimed in claim 24, wherein the foldable material comprises some parachute material.

27. A projector screen as claimed in claim 24, wherein the foldable material is a parachute material.

28. A projector screen as claimed in claim 24, wherein the projector screen comprises a collapsible frame in which the unfolded material can be framed to provide the viewing area configured to receive a projected image.

29. A projector screen as claimed in claim 24, wherein the projection viewing area is made from a semi-transparent material allowing viewing of a projected image from the viewing area and from an area on the reverse face of the viewing area.

30. Projection processing circuitry comprising:

image capturing circuitry arranged to provide digital capturing of a reference picture image to provide reference picture image data;

distortion calculating circuitry arranged to calculate user perceived distortion of the reference picture image to generate one or more correction parameters using the reference picture image data;

projection image circuitry arranged to use one or more of the correction parameters to adjust the projection properties of a subsequent projection image to compensate for the user perceived distortion.

31. Projection processing circuitry as claimed in claim 30, wherein the distortion correction parameters are generated by comparing one or more properties of the captured digital reference picture image determined from the reference picture data with one or more predetermined properties of the reference picture.

32. Projection processing circuitry as claimed in claim 30, comprising projection circuitry arranged to project one or more reference images.

33. Projection processing circuitry as claimed in claim 30, wherein the image capturing circuitry is arranged to capture a reference picture in the visual part of the spectrum.

34. Projection processing circuitry as claimed in claim 30, wherein the image capturing circuitry is arranged to capture a reference picture in the non-visual part of the spectrum.

35. A user-portable device comprising the projection processing circuitry of claim 30.

36. A user-portable device comprising the image capturing circuitry of claim 30.

37. A user-portable device comprising the distortion calculating circuitry of claim 30.

38. A user-portable device comprising the projection image circuitry of claim 30.

39. A user-portable device comprising the image capturing circuitry of claim 30, wherein the device is arranged to be connectable to the image distortion calculating circuitry.

40. A user-portable device comprising the image capturing circuitry of claim 30, wherein the device is arranged to be connectable to the projection image circuitry.

41. Projection processing circuitry as claimed in claim 30, wherein the image capturing circuitry is arranged to provide reference picture data relating to the image quality of the reference picture, the image quality relating to the intrinsic properties of the reference picture.

42. Projection processing circuitry as claimed in claim 30, wherein the image capturing circuitry is arranged to provide reference picture data relating to the image quality of the reference picture, the image quality relating to the intrinsic properties of the reference picture, the intrinsic property including one or more of brightness, colour correction, auto white balance, contrast, background texture information.

43. Projection processing circuitry as claimed in claim 30, wherein the distortion calculating circuitry is arranged to use the distance between a projector apparatus and image capturing apparatus to calculate one or more correction parameters.

44. Projection processing circuitry as claimed in claim 30, wherein the image capturing circuitry is arranged to capture the relative movement of the projector with respect to a reference image on a projection screen to determine reference picture image data relating to the relative movement.

45. Projection processing circuitry as claimed in claim 30, wherein the distortion calculating circuitry is arranged to calculate the relative movement of the projector with respect to a reference image on a projection screen to determine correction parameters to compensate for the relative movement.

46. Projection processing circuitry as claimed in claim 30, wherein the image capturing circuitry is arranged to capture the relative movement of the projector with respect to a reference image on a projection screen by capturing the movement of the reference image within a captured view to determine reference picture image data relating to the relative movement.

47. Projection processing circuitry as claimed in claim 30, wherein the image capturing circuitry is arranged to capture the geometric distortion of a reference image on a projection screen to determine reference picture image data relating to geometric distortion.

48. Projection processing circuitry as claimed in claim 30, wherein the distortion calculating circuitry is arranged to calculate the geometric distortion of a reference image to determine correction parameters to compensate for the geometric distortion.

49. Projection processing circuitry as claimed in claim 30, wherein the image capturing circuitry is arranged to capture the rotational distortion of a reference image on a projection screen to determine reference picture image data relating to rotational distortion.

50. Projection processing circuitry as claimed in claim 30, wherein the distortion calculating circuitry is arranged to calculate the rotational distortion of a reference image to determine correction parameters to compensate for the rotational distortion.

51. Projection processing circuitry according to claim 30, wherein the projection processing circuitry is arranged to detect laser light to provide user input to the projection processing circuitry.

55. Apparatus comprising the circuitry according to claim 30.

56. Apparatus comprising the circuitry according to claim 51.

52. A method of projecting an image on a screen comprising

digitally capturing a reference picture to provide digitally captured reference picture image data;

calculating user perceived distortion of the reference picture image;

generating one or more correction parameters based on the user perceived distortion calculation;

preparing a subsequent projection image using one or more of the correction parameters to adjust the projection properties of the subsequent projection image to compensate for the user perceived distortion.

53. A method as claimed in claim 52, wherein the calculating step comprises comparing one or more properties of the captured digital reference picture image obtained from the reference picture image data with one or more predetermined properties of the reference picture

57. A computer program comprising computer code arranged to perform the method of claim 52.