Invention Grant
- Patent Title: Apparatus and methods for image alignment
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Application No.: US14949786Application Date: 2015-11-23
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Publication No.: US09792709B1Publication Date: 2017-10-17
- Inventor: Antoine Meler
- Applicant: GOPRO, INC.
- Applicant Address: US CA San Mateo
- Assignee: GoPro, Inc.
- Current Assignee: GoPro, Inc.
- Current Assignee Address: US CA San Mateo
- Agency: Sheppard Mullin Richter & Hampton LLP
- Main IPC: G06T11/60
- IPC: G06T11/60 ; G06T3/00 ; H04N5/232

Abstract:
Multiple images may be combined to obtain a composite image. Individual images may be obtained with different camera sensors and/or at different time instances. In order to obtain the composite image source images may be aligned in order to produce a seamless stitch. Source images may be characterized by a region of overlap. A disparity measure may be determined for pixels along a border region between the source images. A warp transformation may be determined using an optimizing process configured to determine displacement of pixels of the border region based on the disparity. Pixel displacement at a given location may be constrained to direction configured tangential to an epipolar line corresponding to the location. The warp transformation may be propagated to pixels of the image. Spatial and/or temporal smoothing may be applied. In order to obtain optimized solution, the warp transformation may be determined at multiple spatial scales.
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