Camera-Based Measurement Calibration Using Virtual Workspace

The patent introduces a calibration object with known dimensions as an intermediary between the camera and the workspace. This calibration object serves as a mediator that translates the camera's potentially inaccurate measurements into accurate measurements by providing a reference with known dimensions. The calibration object captures manufacturer-specific characteristics and converts them into accurate measurement data through the established relationship between the calibration object's known dimensions and the camera's measured dimensions.

The patent changes the measurement parameters by introducing a calibration factor derived from the calibration object. Instead of relying on the camera's raw measurement parameters which vary by manufacturer, the system transforms the measurement process by incorporating a calibration parameter that accounts for manufacturer-specific characteristics. This parameter change converts inaccurate raw measurements into accurate measurements by applying the calibration ratio between known and measured dimensions of the calibration object.

The calibration process is designed to be self-service in nature, where the system automatically captures images of the calibration object, extracts its dimensions, and computes calibration factors without requiring manual intervention or complex setup procedures. The computing device autonomously processes the calibration data and establishes the relationship between the calibration object's known dimensions and the camera's measurements, eliminating the need for complex manual calibration procedures.

The patent uses a digital copy or representation of the calibration object within the virtual workspace to establish measurement accuracy. By creating a virtual model of the calibration object with known dimensions and comparing it to the camera's captured image, the system establishes a calibration relationship without requiring physical manipulation or complex hardware modifications. This copying approach simplifies the calibration process while maintaining precision.

The patent replaces the mechanical system of physical markers with a digital/virtual calibration object. Instead of requiring users to print, cut, and physically place markers throughout the workspace, the system uses a virtual calibration object that can be digitally positioned and referenced within the software environment. This substitution eliminates the manual physical handling of markers while maintaining the calibration function, significantly improving ease of operation.

The calibration object serves multiple functions: it provides dimensional reference for calibration, acts as a measurement reference for the workspace, and can be virtually positioned anywhere in the digital environment. This multi-functionality eliminates the need for multiple different physical markers while maintaining measurement precision across different locations and scales in the workspace.