Imaging-based sensor calibration
Sensor calibration relative to common coordinates with depth, height and shift dimensions includes obtaining, via a mobile apparatus camera, an image of a calibration target. The calibration target includes first and second surfaces at first and second predefined depths, bearing first and second set...
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creator | Obotnine Alexandre |
description | Sensor calibration relative to common coordinates with depth, height and shift dimensions includes obtaining, via a mobile apparatus camera, an image of a calibration target. The calibration target includes first and second surfaces at first and second predefined depths, bearing first and second sets of indicia at heights encoded by the indicia and having predefined shifts. The method includes decoding the heights; generating first and second transforms between image coordinates and first and second planes at predefined common coordinate depths; applying the transforms to each of a plurality of calibration pixels to generate position pairs including calibration positions on each of the first and second planes; determining a common coordinate camera position from an intersection of calibration lines defined by the position pairs; and storing the camera position in association with a location of the mobile apparatus, for common coordinate mapping of subsequent images captured at subsequent mobile apparatus locations. |
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The calibration target includes first and second surfaces at first and second predefined depths, bearing first and second sets of indicia at heights encoded by the indicia and having predefined shifts. The method includes decoding the heights; generating first and second transforms between image coordinates and first and second planes at predefined common coordinate depths; applying the transforms to each of a plurality of calibration pixels to generate position pairs including calibration positions on each of the first and second planes; determining a common coordinate camera position from an intersection of calibration lines defined by the position pairs; and storing the camera position in association with a location of the mobile apparatus, for common coordinate mapping of subsequent images captured at subsequent mobile apparatus locations.</description><language>eng</language><subject>CALCULATING ; CHAMBERS PROVIDED WITH MANIPULATION DEVICES ; COMPUTING ; COUNTING ; ELECTRIC COMMUNICATION TECHNIQUE ; ELECTRICITY ; HAND TOOLS ; HANDLING RECORD CARRIERS ; MANIPULATORS ; PERFORMING OPERATIONS ; PHYSICS ; PICTORIAL COMMUNICATION, e.g. TELEVISION ; PORTABLE POWER-DRIVEN TOOLS ; PRESENTATION OF DATA ; RECOGNITION OF DATA ; RECORD CARRIERS ; TRANSPORTING</subject><creationdate>2018</creationdate><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=20180410&DB=EPODOC&CC=US&NR=9940535B1$$EHTML$$P50$$Gepo$$Hfree_for_read</linktohtml><link.rule.ids>230,309,781,886,25566,76549</link.rule.ids><linktorsrc>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=20180410&DB=EPODOC&CC=US&NR=9940535B1$$EView_record_in_European_Patent_Office$$FView_record_in_$$GEuropean_Patent_Office$$Hfree_for_read</linktorsrc></links><search><creatorcontrib>Obotnine Alexandre</creatorcontrib><title>Imaging-based sensor calibration</title><description>Sensor calibration relative to common coordinates with depth, height and shift dimensions includes obtaining, via a mobile apparatus camera, an image of a calibration target. The calibration target includes first and second surfaces at first and second predefined depths, bearing first and second sets of indicia at heights encoded by the indicia and having predefined shifts. The method includes decoding the heights; generating first and second transforms between image coordinates and first and second planes at predefined common coordinate depths; applying the transforms to each of a plurality of calibration pixels to generate position pairs including calibration positions on each of the first and second planes; determining a common coordinate camera position from an intersection of calibration lines defined by the position pairs; and storing the camera position in association with a location of the mobile apparatus, for common coordinate mapping of subsequent images captured at subsequent mobile apparatus locations.</description><subject>CALCULATING</subject><subject>CHAMBERS PROVIDED WITH MANIPULATION DEVICES</subject><subject>COMPUTING</subject><subject>COUNTING</subject><subject>ELECTRIC COMMUNICATION TECHNIQUE</subject><subject>ELECTRICITY</subject><subject>HAND TOOLS</subject><subject>HANDLING RECORD CARRIERS</subject><subject>MANIPULATORS</subject><subject>PERFORMING OPERATIONS</subject><subject>PHYSICS</subject><subject>PICTORIAL COMMUNICATION, e.g. TELEVISION</subject><subject>PORTABLE POWER-DRIVEN TOOLS</subject><subject>PRESENTATION OF DATA</subject><subject>RECOGNITION OF DATA</subject><subject>RECORD CARRIERS</subject><subject>TRANSPORTING</subject><fulltext>true</fulltext><rsrctype>patent</rsrctype><creationdate>2018</creationdate><recordtype>patent</recordtype><sourceid>EVB</sourceid><recordid>eNrjZFDwzE1Mz8xL101KLE5NUShOzSvOL1JITszJTCpKLMnMz-NhYE1LzClO5YXS3AwKbq4hzh66qQX58anFBYnJqXmpJfGhwZaWJgamxqZOhsZEKAEAFnwlJw</recordid><startdate>20180410</startdate><enddate>20180410</enddate><creator>Obotnine Alexandre</creator><scope>EVB</scope></search><sort><creationdate>20180410</creationdate><title>Imaging-based sensor calibration</title><author>Obotnine Alexandre</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-epo_espacenet_US9940535B13</frbrgroupid><rsrctype>patents</rsrctype><prefilter>patents</prefilter><language>eng</language><creationdate>2018</creationdate><topic>CALCULATING</topic><topic>CHAMBERS PROVIDED WITH MANIPULATION DEVICES</topic><topic>COMPUTING</topic><topic>COUNTING</topic><topic>ELECTRIC COMMUNICATION TECHNIQUE</topic><topic>ELECTRICITY</topic><topic>HAND TOOLS</topic><topic>HANDLING RECORD CARRIERS</topic><topic>MANIPULATORS</topic><topic>PERFORMING OPERATIONS</topic><topic>PHYSICS</topic><topic>PICTORIAL COMMUNICATION, e.g. TELEVISION</topic><topic>PORTABLE POWER-DRIVEN TOOLS</topic><topic>PRESENTATION OF DATA</topic><topic>RECOGNITION OF DATA</topic><topic>RECORD CARRIERS</topic><topic>TRANSPORTING</topic><toplevel>online_resources</toplevel><creatorcontrib>Obotnine Alexandre</creatorcontrib><collection>esp@cenet</collection></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>Obotnine Alexandre</au><format>patent</format><genre>patent</genre><ristype>GEN</ristype><title>Imaging-based sensor calibration</title><date>2018-04-10</date><risdate>2018</risdate><abstract>Sensor calibration relative to common coordinates with depth, height and shift dimensions includes obtaining, via a mobile apparatus camera, an image of a calibration target. The calibration target includes first and second surfaces at first and second predefined depths, bearing first and second sets of indicia at heights encoded by the indicia and having predefined shifts. The method includes decoding the heights; generating first and second transforms between image coordinates and first and second planes at predefined common coordinate depths; applying the transforms to each of a plurality of calibration pixels to generate position pairs including calibration positions on each of the first and second planes; determining a common coordinate camera position from an intersection of calibration lines defined by the position pairs; and storing the camera position in association with a location of the mobile apparatus, for common coordinate mapping of subsequent images captured at subsequent mobile apparatus locations.</abstract><oa>free_for_read</oa></addata></record> |
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subjects | CALCULATING CHAMBERS PROVIDED WITH MANIPULATION DEVICES COMPUTING COUNTING ELECTRIC COMMUNICATION TECHNIQUE ELECTRICITY HAND TOOLS HANDLING RECORD CARRIERS MANIPULATORS PERFORMING OPERATIONS PHYSICS PICTORIAL COMMUNICATION, e.g. TELEVISION PORTABLE POWER-DRIVEN TOOLS PRESENTATION OF DATA RECOGNITION OF DATA RECORD CARRIERS TRANSPORTING |
title | Imaging-based sensor calibration |
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