PATENT CLAIM ANALYSIS

Application Number: 15970965
Application Type: Utility
Filing Date: 2018-05
Publication Date: 2018-11
Patent Classification: ["382", "205000"]

Abstract:
The present disclosure relates to a high precision method, model, and apparatus for calibrating the intrinsic camera parameter values of one or more intrinsic parameters of a camera. The intrinsic parameters include focal lengths, skew, optical center, and radial distortion coefficients. The practical implementation of the solution consists of a camera capturing several images of a planar calibration pattern from different viewpoints, and a computer implemented processing pipeline. The solution does not require additional human input and is robust to misdetection of the calibration pattern in some of the images.

Claim (Index 1):
A method for automatic camera calibration of an image capture device, the method comprising:\n obtaining, by a computing unit, a plurality of images of a planar calibration pattern captured by the image capture device from different respective angles; detecting, by the computing unit, a plurality of distinguishable features depicted in the planar calibration pattern for each obtained image; for each image, generating, by the computing unit, a respective lattice graph corresponding to the image based on the distinguishable features detected from the image, wherein each respective lattice graph has a plurality of nodes corresponding to distinguishable features; repeatedly calibrating, by the computing unit, a plurality of intrinsic camera parameter values corresponding to one or more intrinsic camera parameters of the image capture device based on two or more distinguishable features detected in two or more of the images and the lattice graphs corresponding to the two or more images, wherein the calibrating is performed for two or more different combinations of the images; selecting, by the computing unit, one or more intrinsic camera parameter values from the plurality of intrinsic camera parameter values, wherein the one or more intrinsic camera parameter values are selected to minimize a robust estimator of a reprojection error over the obtained plurality of images; and refining, by the computing unit, calibration of the plurality of intrinsic camera parameter values based on the one or more selected intrinsic camera parameters.

Metadata:
- Claim Count in Document: 65.0
- Percentile: 93.0
- Lexical Diversity: 1.5873
- Patent Class: 382.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: False
- Related Applications: ['14286165', '15635120', '15710702', '15801692', '14865211']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.3218729657330659
- 35 USC 102 Novelty (BERT): 0.4826331685648564
- Combined Prediction Score: 0.337948986016245
- Mean Citation Score: 187.46679
- Max Citation Score: 197.2603
- Similarity Product: 144.66461104676725

Labels:
- Claim Label 101: 1
- Claim Label 102: 1
- Claim Label 103: 0
- Claim Label 112: 1
- Combined Label: 1
- Label 101 Adjusted: 1

Dataset: test