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公开(公告)号：US10041786B2
公开(公告)日：2018-08-07
申请号：US15456676
申请日：2017-03-13
申请人： Cognex Corporation
发明人： Robert A. Wolff , Michael C. Moed , Mikhail Akopyan , Robert Tremblay , Willard Foster , Aaron S. Wallack
摘要： This invention provides a system for measuring displacement of an object surface having a displacement sensor that projects a line on the object surface and receives light from the projected line at an imager in a manner defines a plurality of displacement values in a height direction. A vision system processor operates on rows of imager pixels to determine a laser line center in columns of imager pixels in each of a plurality of regions of interest. Each region of interest defines a plurality of rows that correspond with expected locations of the projected line on the object surface. A GUI can be used to establish the regions. In further embodiments, the system generates grayscale images with the imager. These grayscale images can be compared to a generated height image to compensate for contrast-induced false height readings. Imager pixels can be compared to a reference voltage to locate the line.
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公开(公告)号：US20180157886A1
公开(公告)日：2018-06-07
申请号：US15700620
申请日：2017-09-11
申请人： COGNEX CORPORATION
发明人： James Negro , John F. Keating , Michael C. Moed
CPC分类号： G06K7/1465 , G06K7/10722 , G06K7/10762 , G06K7/10871 , G06K7/1417 , G06K7/1443
摘要： A method and apparatus for decoding codes applied to objects for use with a camera and a conveyor system wherein the camera includes an image sensor having a two dimensional field of view (FOV) and the conveyor system moves objects through the FOV such that objects enter the FOV along an entry edge and exit the FOV along an exit edge, the method comprising the steps of providing a processor programmed to perform the steps of obtaining images of the FOV, for each image identifying code candidates in at least portions of the image, ordering at least a subset of the code candidates for decoding in a candidate order wherein the candidate order is determined at least in part as a function of the first direction of travel through the FOV, attempting to decode code candidates in the order specified by the direction of travel and when a new image event occurs, foregoing attempts to decode at least a portion of the identified code candidates.
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公开(公告)号：US09760752B2
公开(公告)日：2017-09-12
申请号：US14191695
申请日：2014-02-27
申请人： COGNEX CORPORATION
发明人： James Negro , John F. Keating , Michael C. Moed
CPC分类号： G06K7/1465 , G06K7/10722 , G06K7/10762 , G06K7/10871 , G06K7/1417 , G06K7/1443
摘要： A method and apparatus for decoding codes applied to objects for use with a camera and a conveyor system wherein the camera includes an image sensor having a two dimensional field of view (FOV) and the conveyor system moves objects in a first direction of travel through the FOV such that objects enter the FOV along an entry edge and exit the FOV along an exit edge, the method comprising the steps of providing a processor programmed to perform the steps of obtaining images of the FOV, for each image identifying code candidates in at least portions of the image, ordering at least a subset of the code candidates for decoding in a candidate order wherein the candidate order is determined at least in part as a function of the first direction of travel through the FOV, attempting to decode code candidates in the order specified by the direction of travel and when a new image event occurs, foregoing attempts to decode at least a portion of the identified code candidates.
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公开(公告)号：US10775160B2
公开(公告)日：2020-09-15
申请号：US16056348
申请日：2018-08-06
申请人： Cognex Corporation
发明人： Robert A. Wolff , Michael C. Moed , Mikhail Akopyan , Robert Tremblay , Willard Foster , Aaron S. Wallack
摘要： This invention provides a system for measuring displacement of an object surface having a displacement sensor that projects a line on the object surface and receives light from the projected line at an imager in a manner defines a plurality of displacement values in a height direction. A vision system processor operates on rows of imager pixels to determine a laser line center in columns of imager pixels in each of a plurality of regions of interest. Each region of interest defines a plurality of rows that correspond with expected locations of the projected line on the object surface. A GUI can be used to establish the regions. In further embodiments, the system generates grayscale images with the imager. These grayscale images can be compared to a generated height image to compensate for contrast-induced false height readings. Imager pixels can be compared to a reference voltage to locate the line.
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公开(公告)号：US10325129B2
公开(公告)日：2019-06-18
申请号：US15700620
申请日：2017-09-11
申请人： COGNEX CORPORATION
发明人： James Negro , John F. Keating , Michael C. Moed
摘要： A method and apparatus for decoding codes applied to objects for use with a camera and a conveyor system wherein the camera includes an image sensor having a two dimensional field of view (FOV) and the conveyor system moves objects through the FOV such that objects enter the FOV along an entry edge and exit the FOV along an exit edge, the method comprising the steps of providing a processor programmed to perform the steps of obtaining images of the FOV, for each image identifying code candidates in at least portions of the image, ordering at least a subset of the code candidates for decoding in a candidate order wherein the candidate order is determined at least in part as a function of the first direction of travel through the FOV, attempting to decode code candidates in the order specified by the direction of travel and when a new image event occurs, foregoing attempts to decode at least a portion of the identified code candidates.
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公开(公告)号：US09605950B2
公开(公告)日：2017-03-28
申请号：US14149774
申请日：2014-01-07
申请人： Cognex Corporation
发明人： Robert A. Wolff , Michael C. Moed , Mikhail Akopyan , Robert Tremblay , Willard Foster , Aaron S. Wallack
CPC分类号： G01B11/2522 , G01B11/026 , G05B15/02 , G06K9/2081 , G06K9/3233 , G06T5/005 , G06T7/74 , G06T2200/24 , G06T2207/20072
摘要： This invention provides a system for measuring displacement of an object surface having a displacement sensor that projects a line on the object surface and receives light from the projected line at an imager in a manner defines a plurality of displacement values in a height direction. A vision system processor operates on rows of imager pixels to determine a laser line center in columns of imager pixels in each of a plurality of regions of interest. Each region of interest defines a plurality of rows that correspond with expected locations of the projected line on the object surface. A GUI can be used to establish the regions. In further embodiments, the system generates grayscale images with the imager. These grayscale images can be compared to a generated height image to compensate for contrast-induced false height readings. Imager pixels can be compared to a reference voltage to locate the line.
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公开(公告)号：US20190265027A1
公开(公告)日：2019-08-29
申请号：US16056348
申请日：2018-08-06
申请人： Cognex Corporation
发明人： Robert A. Wolff , Michael C. Moed , Mikhail Akopyan , Robert Tremblay , Willard Foster , Aaron S. Wallack
摘要： This invention provides a system for measuring displacement of an object surface having a displacement sensor that projects a line on the object surface and receives light from the projected line at an imager in a manner defines a plurality of displacement values in a height direction. A vision system processor operates on rows of imager pixels to determine a laser line center in columns of imager pixels in each of a plurality of regions of interest. Each region of interest defines a plurality of rows that correspond with expected locations of the projected line on the object surface. A GUI can be used to establish the regions. In further embodiments, the system generates grayscale images with the imager. These grayscale images can be compared to a generated height image to compensate for contrast-induced false height readings. Imager pixels can be compared to a reference voltage to locate the line.
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公开(公告)号：US20170299380A1
公开(公告)日：2017-10-19
申请号：US15456676
申请日：2017-03-13
申请人： Cognex Corporation
发明人： Robert A. Wolff , Michael C. Moed , Mikhail Akopyan , Robert Tremblay , Willard Foster , Aaron S. Wallack
CPC分类号： G01B11/2522 , G01B11/026 , G05B15/02 , G06K9/2081 , G06K9/3233 , G06T5/005 , G06T7/74 , G06T2200/24 , G06T2207/20072
摘要： This invention provides a system for measuring displacement of an object surface having a displacement sensor that projects a line on the object surface and receives light from the projected line at an imager in a manner defines a plurality of displacement values in a height direction. A vision system processor operates on rows of imager pixels to determine a laser line center in columns of imager pixels in each of a plurality of regions of interest. Each region of interest defines a plurality of rows that correspond with expected locations of the projected line on the object surface. A GUI can be used to establish the regions. In further embodiments, the system generates grayscale images with the imager. These grayscale images can be compared to a generated height image to compensate for contrast-induced false height readings. Imager pixels can be compared to a reference voltage to locate the line.
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公开(公告)号：US09626776B2
公开(公告)日：2017-04-18
申请号：US14136864
申请日：2013-12-20
申请人： Cognex Corporation
CPC分类号： G06T11/003 , G06T7/55 , G06T7/62 , G06T7/73 , G06T11/001 , G06T2207/10028 , G06T2215/08
摘要： The disclosed apparatus, systems, and methods can process height maps. For example, the disclosed computerized method of determining posture information of an object in a two-dimensional height map captured by a range sensor system can include receiving the height map of the object captured by the range sensor system, generating a plurality of one-dimensional slices of the height map and a location record indicating locations of the plurality of one-dimensional slices on the height map, identifying points of interest in the plurality of one-dimensional slices, determining locations of the identified points of interest in the height map based on the location record, and determining the posture information of the object based on the locations of the identified points of interest in the height map.
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公开(公告)号：US09803975B2
公开(公告)日：2017-10-31
申请号：US15069308
申请日：2016-03-14
申请人： COGNEX CORPORATION
CPC分类号： G01B11/06 , G01B11/25 , G06K7/10544 , G06K7/1417 , G06K9/2027 , G06K9/22 , G06K9/3208 , G06K9/3216 , G06K2007/10524 , G06T7/62 , G06T2207/10016 , G06T2207/10152
摘要： A handheld device and method using the device, the device comprising a sensor receiving light from within a field of view (FOV) to generate a plurality of consecutive images of the FOV, a structured light source that is controllable to generate a plurality of light patterns, the source arranged to project at least one light patterns into the FOV where at least a portion of a pattern reflects from an object and is captured by the sensor and a processor to receive images, the processor programmed to control the source to project a pattern into the FOV, locate the pattern in at least one of the generated images, locate discontinuities in the pattern and use the discontinuities to measure at least one dimension.
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