A projector screen includes one or more markers that are configured to be usable by projection processing circuitry in order to calculate a user perceived distortion in an image to be projected on the projector screen.
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The invention claimed is: 1. A projection system for calculating a user perceived distortion in an image to be projected onto a projector screen, the projection system comprising: a projector screen; and projection processing circuitry, the projector screen comprising one or more markers configured
The invention claimed is: 1. A projection system for calculating a user perceived distortion in an image to be projected onto a projector screen, the projection system comprising: a projector screen; and projection processing circuitry, the projector screen comprising one or more markers configured to be able to provide a reference picture image to be used by projection processing circuitry to allow for calculation of a user perceived geometric/color distortion in an image drat is to the projected on the projector screen or more markers comprise light emitting markers, the projection processing circuitry comprising: image capturing circuitry configured to provide digital capturing of a reference picture image provided by the one or more markers of the projector screen to thereby provide reference picture image data; distortion calculating circuitry configured to calculate user perceived geometric/color distortion of the reference picture image using the reference picture image data. 2. The projection system as claimed in claim 1, wherein the one or more light emitting markers, have a light emitting state and a non-light emitting state, and where the light emitting state is provided by an energy source. 3. The projection system as claimed in claim 1, wherein the one or more light emitting markers have a light emitting state and a non-light emitting state, and where the light emitting state is provided by an integral energy source. 4. The projection system as claimed in claim 1, wherein the one or more light emitting markers have 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. 5. The projection system as claimed in claim 1, wherein the one or more light emitting markers have 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 configured to receive the signal command front a user interface element located on the screen. 6. The projection system as claimed in claim 1, wherein the one or more light emitting markers have 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 inure markers into the light emitting state from the non-light emitting state, the user interface circuitry being configured to receive the signal command from a remote source. 7. The projection system as chimed in claim 1, wherein the one or more light emitting markers have 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 line the light emitting state from the non-light emitting state, the user interface circuitry being configured 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. 8. The projection system as claimed in claim 1, wherein the one or more light emitting markers have a light emitting state and a non-fight 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 configured 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. 9. The projection system as claimed in claim 1, wherein the one or more light emitting markers have 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 configured 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. 10. The projection system as claimed in claim 1, wherein the one or more light emitting markers have a light emitting state and a non-light emitting state, the projector screen being configured to move the one or more markers into the light emitting state from the non-light emitting state at predetermined intervals. 11. The projection system as chimed in claim 1, wherein the one or more light emitting markers are configured to emit light in the non-visual spectrum. 12. The projection system as claimed in claim 1, wherein the one or more light emitting markers are configured to emit light in the visual spectrum. 13. The projection system as claimed in claim 1, wherein the one or more light emitting markers are configured to emit light in the visual spectrum, and wherein the markets comprise fluorescent material. 14. The projection system as claimed in claim 1, wherein the one or more light emitting markers are configured to emit light in the visual spectrum, and wherein the markers comprise a fluorescent paint applied to the surface of the projector screen. 15. The projection, system as claimed in claim 1, wherein one or more of the light emitting markers are of a color distinct from the color of the projection viewing area. 16. The projection system as claimed in claim 1, wherein one or more of light emitting markers are positioned around the projection viewing area of the screen. 17. The projection system as claimed in claim 1, wherein one or more light emitting markers are positioned around the projection viewing area to form a frame around the projection viewing area. 18. The projection system as claimed in claim 1, wherein the projector screen is portable. 19. The projection system as claimed in claim 1, wherein the projector screen comprises a projection viewing area made from a foldable material. 20. The projection system as claimed in claim 1, wherein the projector screen comprises a projection viewing area made from a foldable parachute-based material. 21. The projection system as claimed in claim 1, wherein the projection system further comprises projector screen user interface circuitry configured to be able to control the activation of the one or more light emitting markers of the projector screen, the light emitting markers have a light emitting state and a non-light emitting state and being configured to be used by projection processing circuitry to calculate a user perceived geometric/color 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 configured to receive a signal command to move the one or mare markers into the light emitting state from the non-light emitting state. 22. The projection system as claimed in claim 1, wherein the projector screen is a portable projector screen, the projector screen comprising a projection viewing area, and wherein the projection viewing area is made from a foldable material. 23. The projection system as claimed in claim 22, wherein the foldable material has similar foldable properties to parachute material. 24. The projection system as claimed in claim 22, wherein the foldable material comprises same parachute material. 25. The projection system as claimed in claim 22, wherein the foldable material is a parachute material. 26. The projection system as claimed in claim 22, 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. 27. The projection system as claimed in claim 22, wherein the projection viewing area is nude 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. 28. The projection system as claimed in claim 1, wherein the projector screen is collapsible. 29. The projection system as claimed in claim 1, the projector screen comprising a frame, wherein the frame is configured to allow for the screen to move from a folded collapsed configuration to an unfolded configuration. 30. The projection system as claimed in claim 29, wherein the frame is formed from telescopic parts which are configured to be opened to form the frame. 31. The projection system as claimed in claim 30, wherein: the frame is formed from a flexible wire; in the folded configuration, the wire is folded back upon itself; and in the unfolded configuration, the wire opens into the frame. 32. The projection system as claimed in claim 31, wherein the wire of the frame is configured to open our into the unfolded configuration when unbiased. 33. The projection system as claimed in claim 1, wherein the distortion calculating circuitry is further configured to generate one or more correction parameters using the reference picture image data. 34. The projection system as claimed in claim 33, the projection processing circuitry further comprising: projection image circuitry configured to use one or more of the correction parameters generated by the distortion calculating circuitry to adjust the projection properties of a subsequent image to be projected to compensate for the user perceived geometric/color distortion. 35. The projection system as claimed in claim 1, 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. 36. The projection system as claimed in claim 1, wherein the image capturing circuitry is configured to capture a reference picture in the non-visual part of the spectrum. 37. The projection system as claimed in claim 1, wherein the image capturing circuitry is configured to provide reference picture image data relating to the image quality of the reference picture image, the image quality relating to the intrinsic properties of the reference picture. 38. The projection system as claimed in claim 1, wherein the image capturing circuitry is configured 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. 39. The projection system as claimed in claim 1, wherein the distortion calculating circuitry is configured to use the distance between a projector apparatus and image capturing apparatus to calculate one or more correction parameters. 40. The projection system as claimed in claim 1, wherein the distortion calculating circuitry is configured 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. 41. The projection system as claimed in claim 1, wherein the image capturing circuitry is configured 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. 42. The projection system as claimed in claim 1, wherein the distortion calculating circuitry is configured to calculate the rotational distortion of a reference image to determine correction parameters to compensate for the rotational distortion.
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