PATENT CLAIM ANALYSIS

Application Number: 15967364
Application Type: Utility
Filing Date: 2018-04
Publication Date: 2018-11
Patent Classification: ["348", "208200"]

Abstract:
A target image captured from a fisheye lens or other lens with known distortion parameters may be transformed to align it to a reference image. Corresponding features may be detected in the target image and the reference image. The features may be transformed to a spherical coordinate space. In the spherical space, images may be re-pointed or rotated in three dimensions to align all or a subset of the features of the target image to the corresponding features of the reference image. For example, in a sequence of images, background features of the target image in the spherical image space may be aligned to background features of the reference image in the spherical image space to compensate for camera motion while preserving foreground motion. An inverse transformation may then be applied to bring the images back into the original image space.

Claim (Index 36):
A video server comprising:\n one or more processors; and a non-transitory computer-readable apparatus comprising a computer program configured to align a target image to a reference image in the presence of lens distortion, the computer program comprising instructions that, when executed by the one or more processors, causes the one or more processors to:\n receive the target image and the reference image; \n detect a first plurality of visual features appearing in the target image at first image feature coordinates in a two-dimensional image space, and a corresponding second plurality of visual features appearing in the reference image at second image feature coordinates in the two-dimensional image space; \n transform the first image feature coordinates and the second image feature coordinates from the two-dimensional image space to a three-dimensional spherical space to generate respective first spherical feature coordinates and second spherical feature coordinates; \n apply a rotation to the target image in the three-dimensional spherical space to generate a rotated target image via at least:\n determination of at least a subset of the first spherical feature coordinates and a corresponding subset of the second spherical feature coordinates as background features in the target image and the reference image, respectively; \n determination of feature tracks representing a distance along a spherical arc and direction from the first spherical feature coordinates to a corresponding one of the second spherical feature coordinates; \n cluster the feature tracks by length to determine a plurality of feature track clusters; and \n determine from the plurality of feature track clusters, a background cluster of feature tracks corresponding to the background features; and \n \n inverse transform the rotated target image to the two-dimensional image space.

Metadata:
- Claim Count in Document: 59.0
- Percentile: 91.0
- Lexical Diversity: 2.34375
- Patent Class: 348.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: False
- Related Applications: ['15249347', '12110669', '13316356', '13178867', '15800047']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.5438367423985133
- 35 USC 102 Novelty (BERT): 0.5619999413975113
- Combined Prediction Score: 0.5456530622984131
- Mean Citation Score: 216.3645
- Max Citation Score: 422.66745
- Similarity Product: 381.43438657589263

Labels:
- Claim Label 101: 1
- Claim Label 102: 1
- Claim Label 103: 1
- Claim Label 112: 1
- Combined Label: 1
- Label 101 Adjusted: 1

Dataset: test