Image warping correction in forming 360 degree panoramic images

Image analysis – Image transformation or preprocessing – Combining image portions

Reexamination Certificate

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C382S289000, C382S294000, C382S296000, C345S649000, C348S580000

Reexamination Certificate

active

07400782

ABSTRACT:
A method for creating a 360 degree panoramic image from multiple images includes (1) computing a gross rotation error ΔR between a first image and a calculated first image rotated to be stitched to a last image, and (2) spreading the gross rotation error ΔR to each pixel on the panoramic image. Spreading the gross rotation error ΔR includes (1) computing a rotation angle θ0and rotational axis n0from the gross rotational error ΔR, (2) determining an angle α of each pixel, and (3) determining a compensation matrix Rcfor each pixel using the following formula: Rc(α)=R(α/2πθ0). Spreading the gross rotation error ΔR further includes (4) tracing a pixel on the panoramic image to a camera optical center of the images to form a first ray, (5) determining a second ray originating from the camera optical center that would be rotated by the compensation matrix Rcto coincide with the first ray, (6) tracing the second ray to a second pixel on one of the images, and (7) painting the first pixel with color values of the second pixel.

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