http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-2325579-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_481c5254b98ca8e0a6a095f4f4defcbb |
| classificationCPCAdditional | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/H04N23-695 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/H04N23-635 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/H04N5-272 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/H04N23-673 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/H04N5-232 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/H04N5-272 |
| filingDate | 1998-03-30^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_df04fde62074276305ceec138100e4db |
| publicationDate | 1998-11-25^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-2325579-A |
| titleOfInvention | Camera and lens calibration |
| abstract | A method and apparatus for performing a lens calibration procedure which is executed for each camera and lens pair. The calibration procedure is performed to determine the camera and lens nodal point offset and field of view, plus image offset in both the horizontal and vertical directions as a function of lens zoom and focus settings. The method includes the step of providing apparatus which enables the semi-automatic and rapid entry of data points representing lens zoom and focus setting information, thereby eliminating a source of human error. The general method includes the steps of creating a real image and an identical virtual image. The camera's zoom and focus rings are incremented through a plurality of values by discrete steps. For each value, the virtual image is moved until the real and virtual images coincide on a screen. The settings associated with the virtual image are then recorded as a data point corresponding to a specific camera lens zoom and focus setting. A plurality of data points are then recorded to create the calibration dataset. |
| priorityDate | 1997-04-04^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
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