Invention Grant
- Patent Title: Apparatus and methods for image alignment
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Application No.: US16694834Application Date: 2019-11-25
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Publication No.: US10972661B2Publication Date: 2021-04-06
- Inventor: Antoine Meler , Thomas Derbanne
- Applicant: GoPro, Inc.
- Applicant Address: US CA San Mateo
- Assignee: GoPro, Inc.
- Current Assignee: GoPro, Inc.
- Current Assignee Address: US CA San Mateo
- Agency: Esplin & Associates, PC
- Main IPC: H04N5/232
- IPC: H04N5/232 ; G06T3/00 ; G06T7/55 ; G06T11/60 ; H04N5/262 ; G06T7/593 ; H04N9/64

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 a refinement 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 refined solution, the warp transformation may be determined at multiple spatial scales.
Public/Granted literature
- US20200092475A1 APPARATUS AND METHODS FOR IMAGE ALIGNMENT Public/Granted day:2020-03-19
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