Projection display apparatus and display method
First Claim
1. A projection display apparatus for displaying an image on a projection plane by projection, comprising:
- an image capturing unit capturing an image;
an angle calculator calculating an angle of the projection plane relative to the projection display apparatus;
a straight line detector detecting two straight lines at a left side and a right side of a frame of the projection plane having the largest integrated value of values correlated with an edge amount along the corresponding straight line out of the straight lines passing through a vertical vanishing point in the captured image, and two straight lines at a top side and a bottom side of the frame of the projection plane having the largest integrated value of values correlated with an edge amount along the corresponding straight line out of the straight lines passing through a horizontal vanishing point in the captured image; and
a keystone corrector correcting a keystone distortion of an image to be displayed on the projection plane on the basis of the detection result in the straight line detector.
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Accused Products
Abstract
A projection display apparatus for displaying an image on a projection plane by projection, includes: an image capturing unit capturing an image; an angle calculator calculating an angle of the projection plane relative to the projection display apparatus; a straight line detector detecting a straight line in the captured image corresponding to a line perpendicular to a predetermined reference plane and a straight line in the captured image corresponding to a line parallel to the predetermined reference plane on the basis of the calculated angle; and a keystone corrector correcting a keystone distortion of an image to be displayed on the projection plane on the basis of the detection result in the straight line detector.
10 Citations
9 Claims
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1. A projection display apparatus for displaying an image on a projection plane by projection, comprising:
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an image capturing unit capturing an image; an angle calculator calculating an angle of the projection plane relative to the projection display apparatus; a straight line detector detecting two straight lines at a left side and a right side of a frame of the projection plane having the largest integrated value of values correlated with an edge amount along the corresponding straight line out of the straight lines passing through a vertical vanishing point in the captured image, and two straight lines at a top side and a bottom side of the frame of the projection plane having the largest integrated value of values correlated with an edge amount along the corresponding straight line out of the straight lines passing through a horizontal vanishing point in the captured image; and a keystone corrector correcting a keystone distortion of an image to be displayed on the projection plane on the basis of the detection result in the straight line detector. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A display method of displaying an image on a projection plane by projection, comprising:
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(a) capturing an image; (b) calculating an angle of the projection plane relative to the optical axis of the projection; (c) detecting two straight lines at a left side and a right side of a frame of the projection plane having the largest integrated value of values correlated with an edge amount along the corresponding straight line out of the straight lines passing through a vertical vanishing point in the captured image, and two straight lines at a top side and a bottom side of the frame of the projection plane having the largest integrated value of values correlated with an edge amount along the corresponding straight line out of the straight lines passing through a horizontal vanishing point in the captured image; and (d) correcting a keystone distortion of an image to be displayed on the projection plane on the basis of the detection result of the straight lines.
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Specification