Fast imaging system calibration
AssigneeSeiko Epson Corporation
InventorsAli Zandifar, Anoop K. Bhattacharjya
Life of this patent
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Abstract
Systems and methods are disclosed for calibrating an imaging system comprising a processing unit communicatively coupled to one or more imaging devices. The imaging system may also include a display. In an embodiment, a sequence of display features are displayed on a display, and imaged by the imaging device or devices. Spatial data is compiled related to the display features and the corresponding image features. In an embodiment, the display, imaging device or device, or both may be repositioned and another sequence of display features may be presented and the spatial data compiled. Using optimization and calibration techniques, the compiled spatial data may be used to obtain one or more internal imaging device parameters, one or more external parameters, or both.
Claims19
A method for calibrating an imaging device comprising the steps of:
- positioning a display at a first pose within a field of view of the imaging device;
- displaying a set of single display features on the display, each single display feature consisting of multiple pixels, each single display feature in the set of single display features is displayed at different locations, at different times;
- capturing a set of image features in the imaging device corresponding to the set of single display features;
- compiling spatial data related to the set of single display features and related to the set of image features;
- and
- estimating an imaging device parameter based upon the spatial data.
A method for calibrating an imaging system comprising an array of imaging devices, the method comprising the steps of:
- positioning a display at a plurality of poses within a field of view of at least two imaging devices from the array of imaging devices;
- at each pose:
- displaying a set of single display features on the display, each single display feature consisting of multiple pixels, each single display feature in the set of single display features is displayed at different locations, at different times;
- registering in each of the at least two imaging devices an imaging feature corresponding to the single display feature;
- compiling spatial data related to the single display feature and the corresponding image features;
- and
- estimating a parameter for the imaging system based upon the spatial data.
An imaging system comprising:
- a processing unit;
- a display communicatively coupled to the processing unit;
- and
- at least one imaging device communicatively coupled to the processor unit;
- wherein the processing unit is adapted to perform the steps comprising:
- displaying a set of single display features on the display, each single display feature consisting of multiple pixels, each single display feature in the set of single display features is displayed at different locations, at different times;
- registering in the at least one imaging device an imaging feature corresponding to the single display feature;
- compiling spatial data related to the single display feature and the corresponding image feature;
- and
- estimating a parameter for the imaging system based upon the spatial data.
Dependencies are inferred from the claim text.