Image processing method and image processing device

Details Image processing method and image processing device Image processing method and image processing device

2008-07-15

2008-07-15

Dowling, William C. (Department: 2851)

Optics: image projectors

Distortion compensation

C353S070000

Reexamination Certificate

active

07399086

ABSTRACT:
For keystone correction of the perspective distortion of an image (18) projected onto a projection surface (12), an image existing in electronic form is processed by a processing device to reverse the perspective distortion. For this purpose, the processing device, respectively rotates and shifts exactly one image line (36) at a time, respectively, while the orientation of the other image lines (40,42,46) is maintained fixed. In addition or alternately, the image lines (36,40,42,46) of the original electronic image comprise a plurality of partial sections of equal lengths which are differently stretched and/or compressed by the processing device. Subsequently, the image is newly computed under consideration of all of the image lines (36,40,42,46) and is projected onto a projection surface (12) by a projector.

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