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SonyPatent applicationCameras & imagingInterest 4/10

Sony patents camera calibration using shifting patterns on a tilted screen

Sony describes a system that calibrates a camera by taking photos of a pattern displayed on a screen that is tilted relative to the lens. Instead of using one static image, the system captures the screen at different moments where the pattern has shifted, then combines these points into a single dataset to calculate accurate camera settings.

Why it mattersThis method could help devices like cameras or AR headsets align their lenses more precisely without needing physical calibration tools.

In the filing’s own words

The present disclosure relates to a camera calibration apparatus, a camera calibration method, and a recording medium that allow calibration with higher accuracy to be performed reliably. There is provided a camera calibration apparatus that includes: an image acquisition unit that acquires, from a camera, a captured image indicating a chart pattern displayed in a time division manner on a display panel inclined with respect to an optical axis direction of the camera; a feature-point-information generation unit that generates integrated feature point information by integrating a feature point at a first time of a chart pattern at the first time and a feature point at a second time of a chart pattern at the second time on a single plane, the chart pattern at the first time being included in an image frame at the first time of the captured image, the chart pattern at the second time being included in an image frame at the second time of the captured image and having arrangement of a feature point group different from that of the chart pattern at the first time; and a parameter acquisition unit that acquires a parameter for calibration of the camera on the basis of the integrated feature point information.

What exactly they claim (claim 1)

1. A camera calibration apparatus, comprising: an image acquisition unit that acquires, from a camera, a captured image indicating a chart pattern displayed in a time division manner on a display panel inclined with respect to an optical axis direction of the camera; a feature-point-information generation unit that generates integrated feature point information by integrating a feature point at a first time of a chart pattern at the first time and a feature point at a second time of a chart pattern at the second time on a single plane, the chart pattern at the first time being included in an image frame at the first time of the captured image, the chart pattern at the second time being included in an image frame at the second time of the captured image and having arrangement of a feature point group different from that of the chart pattern at the first time; and a parameter acquisition unit that acquires a parameter for calibration of the camera on a basis of the integrated feature point information.

Facts

Company
Sony (Sony Group Corporation)
Official title
CAMERA CALIBRATION APPARATUS, CAMERA CALIBRATION METHOD, AND RECORDING MEDIUM
Publication number
US20260260381A1
Application number
18994624
Filed
Aug 7, 2023
Published
Sep 3, 2026
Inventors
1
Claims
11

Classified under

G06T 7/80 Physics & computingH04N 17/002 Electricity & electronicsG06T 2207/10048 Physics & computingG06T 2207/30204 Physics & computing
Read the full filing (official PDF) ↗ Open in the Patent Tracker

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Summaries are simplified from the filing’s own abstract and first claim. A patent filing is not a product announcement.
Patent data and drawings: U.S. Patent and Trademark Office (USPTO). Nebula is not affiliated with or endorsed by the USPTO.