Projector and projection method

Details Projector and projection method Projector and projection method

2008-11-06

2010-12-28

Dowling, William C (Department: 2878)

Optics: image projectors

Distortion compensation

C353S079000, C353S121000

Reexamination Certificate

active

07857461

ABSTRACT:
A projector includes: an image capturing unit that captures an image of a projection target image (an original image or a corrected image) projected by the projector on a projection surface; a shape model hold unit that holds shape models; a model selection unit that selects a projection surface shape model based on correspondence relationships between first feature points on the projection target image and second feature points on the captured image; a parameter calculation unit that calculates a model parameter which is to be used to approximate a shape of the projection surface shape model to the shape of the projection surface and indicates a positional relationship between the projection surface and the projector, for each projection target image based on the correspondence relationships; a correction unit that corrects another original image; and a projection unit that projects the corrected image as another projection target image.

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Takahashi et al., “A Geometric Correction Method for Projected Images Using SIFT Feature Points”, 5thACM/IEEE International Workshop on Projector-Camera Systems (PROCAMS2008), Aug. 2008.
Takahashi et al., “Performance Evaluation of a Feature-Based Geometric Correction Method for Projected Images”, The 7thForum on Information Technology (FIT2008), No. RI-006, 3rdVolume, pp. 21-23, Sep. 2008 (including English Translation).
Takahashi et al., “An Experimental Study on Geometric Correction for Projected Images Using Feature Point Extraction”, The 22ndSIP Symposium, No. A3-2, pp. 53-58, Nov. 2007 (including English translation).
Takahashi et al., “Image Correction Method for Multi-Projector Display Using SIFT Features”, SIGGRAPH Asia 2008, Dec. 2008.

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