Text resolution determinations via optical performance metrics
AssigneeHewlett-Packard Development Company, L.P.
InventorsEmily Ann Miginnis, Yow Wei Cheng
Life of this patent
Estimating the term…
Abstract
An example non-transitory machine-readable storage medium encoded with instructions executable by a processor is provided. The machine-readable storage medium includes instructions to identify fiducials on a target comprising multiple sample areas, instructions to determine positions of the fiducials in relation to the multiple sample areas, and instructions to detect a different region of interest (ROI) associated with each of the multiple sample areas based upon the positions. The machine-readable storage medium further includes instructions to calculate an optical performance metric based upon the ROI associated with each sample area, and instructions to determine a text resolution based upon the optical performance metric.
Claims15
A non-transitory machine-readable storage medium encoded with instructions executable by a processor, the machine-readable storage medium comprising:
- instructions to identify fiducials on a target comprising multiple sample areas;
- instructions to determine positions of the fiducials in relation to the multiple sample areas;
- instructions to detect a different region of interest (ROI) associated with each of the multiple sample areas based upon the positions;
- instructions to calculate an optical performance metric based upon the ROI associated with each sample area;
- and
- instructions to determine a text resolution based upon the optical performance metric.
A testing system comprising:
- a processor;
- and
- a storage encoded with instructions executable by the processor to:
- identify fiducials on a target comprising multiple sample areas, the multiple sample areas including a first sample area and a second sample area;
- employ a computer vision technique to determine positions of the fiducials in relation to the first and second sample areas;
- detect, based upon the positions of the fiducials, a first region of interest (ROI) and a second ROI associated with the first sample area and the second sample area, respectively;
- calculate an optical performance metric based upon the first and second ROIs associated with the first and second sample areas, wherein the optical performance metric is calculated using a single image of the target;
- and
- determine a text resolution based upon the optical performance metric.
A test system comprising:
- a test fixture to secure a target;
- and
- a storage encoded with instructions executable by a processor to:
- identify a first marker and a second marker on the target, the target comprising a first slanted edge target and a second slanted edge target;
- determine positions of the first and second markers in relation to the first and second slanted edge targets;
- detect, based upon the positions of the first and second markers, a first region of interest (ROI) and a second ROI associated with the first and second slanted edge targets, respectively;
- calculate an optical performance metric based upon the first and second ROIs associated with the first and second slanted edge targets;
- and
- determine a text resolution based upon the optical performance metric.
Dependencies are inferred from the claim text.