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1. 发明授权

US11216630B2 System and method for auto-focusing a vision system camera on barcodes 有权
公开(公告)号：US11216630B2
公开(公告)日：2022-01-04
申请号：US16896164
申请日：2020-06-08
申请人： Cognex Corporation
发明人： Ivan A. Bachelder , Chen Gao , Francisco Azcona Guerrero , Jose Fernandez Dorado , Esther Oteo Lozano , Andreas Weber
IPC分类号： G06K7/14 , G06K7/10 , H04N5/232
摘要： This invention provides a system and method for detecting and acquiring one or more in-focus images of one or more barcodes within the field of view of an imaging device. A measurement process measures depth-of-field of barcode detection. A plurality of nominal coarse focus settings of a variable lens allow sampling, in steps, of a lens adjustment range corresponding to allowable distances between the one or more barcodes and the image sensor, so that a step size of the sampling is less than a fraction of the depth-of-field of barcode detection. An acquisition process acquires a nominal coarse focus image for each nominal coarse focus setting. A barcode detection process detects one or more barcode-like regions and respective likelihoods. A fine focus process fine-adjusts, for each high-likelihood barcode, the variable lens near a location of the barcode-like regions. The process acquires an image for decoding using the fine adjusted setting.

2. 发明授权

US09361499B2 Barcode decoding 有权
标题翻译：条码解码
公开(公告)号：US09361499B2
公开(公告)日：2016-06-07
申请号：US14511030
申请日：2014-10-09
申请人： Cognex Corporation
发明人： Ivan A. Bachelder , Savithri Vaidyanathan
IPC分类号： G06K5/04 , G06K7/10 , G06K9/00 , G06K7/14
CPC分类号： G06K7/1439 , G06K7/10821 , G06K7/1465 , G06K7/1491
摘要： Systems and methods for decoding a barcode are disclosed. A scan signal for a first portion of the barcode is acquired. Integrated sub-character barcode feature evidence for the barcode is stored including evidence for a first plurality of possible sub-character barcode feature interpretations for a first plurality of sub-character barcode features. Sub-character barcode feature measurements are extracted for a second plurality of sub-character barcode features from the scan signal. Sub-character barcode feature evidence is determined for the second plurality of sub-character barcode features, including evidence for a second plurality of possible sub-character barcode feature interpretations for the second plurality of sub-character barcode features. Whether a portion of the integrated sub-character barcode feature evidence corresponds to a portion of the sub-character barcode feature evidence is determined. The sub-character barcode feature evidence is integrated into the integrated sub-character barcode. Character values are determined from the integrated sub-character barcode feature evidence.
摘要翻译：公开了用于解码条形码的系统和方法。获取条形码的第一部分的扫描信号。存储条形码的集成子字符条形码的特征证据包括用于第一多个子字符条形码特征的第一多个可能的子字符条形码特征解释的证据。从扫描信号提取第二多个子字符条形码特征的子字符条形码特征测量。对于第二多个子字符条形码特征确定子字符条形码特征证据，包括第二多个子字符条形码特征的第二多个可能的子字符条形码特征解释的证据。集成子字符条形码的一部分特征证据是否对应于子字符条形码特征证据的一部分。子字符条形码特征证据集成到集成子字符条形码中。字符值由集成的子字符条形码特征证据确定。

3. 发明授权

US10679024B2 System and method for auto-focusing a vision system camera on barcodes 有权
公开(公告)号：US10679024B2
公开(公告)日：2020-06-09
申请号：US16043716
申请日：2018-07-24
申请人： Cognex Corporation
发明人： Ivan A. Bachelder , Chen Gao , Francisco Azcona Guerrero , Jose Fernandez Dorado , Esther Oteo Lozano , Andreas Weber
IPC分类号： G06K7/14 , G06K7/10 , H04N5/232
摘要： This invention provides a system and method for detecting and acquiring one or more in-focus images of one or more barcodes within the field of view of an imaging device. A measurement process measures depth-of-field of barcode detection. A plurality of nominal coarse focus settings of a variable lens allow sampling, in steps, of a lens adjustment range corresponding to allowable distances between the one or more barcodes and the image sensor, so that a step size of the sampling is less than a fraction of the depth-of-field of barcode detection. An acquisition process acquires a nominal coarse focus image for each nominal coarse focus setting. A barcode detection process detects one or more barcode-like regions and respective likelihoods. A fine focus process fine-adjusts, for each high-likelihood barcode, the variable lens near a location of the barcode-like regions. The process acquires an image for decoding using the fine adjusted setting.

4. 发明申请

US20160104020A1 BARCODE DECODING 有权
标题翻译：条形码解码
公开(公告)号：US20160104020A1
公开(公告)日：2016-04-14
申请号：US14511030
申请日：2014-10-09
申请人： Cognex Corporation
发明人： Ivan A. Bachelder , Savithri Vaidyanathan
IPC分类号： G06K7/14 , G06K7/10
CPC分类号： G06K7/1439 , G06K7/10821 , G06K7/1465 , G06K7/1491
摘要： Systems and methods for decoding a barcode are disclosed. A scan signal for a first portion of the barcode is acquired. Integrated sub-character barcode feature evidence for the barcode is stored including evidence for a first plurality of possible sub-character barcode feature interpretations for a first plurality of sub-character barcode features. Sub-character barcode feature measurements are extracted for a second plurality of sub-character barcode features from the scan signal. Sub-character barcode feature evidence is determined for the second plurality of sub-character barcode features, including evidence for a second plurality of possible sub-character barcode feature interpretations for the second plurality of sub-character barcode features. Whether a portion of the integrated sub-character barcode feature evidence corresponds to a portion of the sub-character barcode feature evidence is determined. The sub-character barcode feature evidence is integrated into the integrated sub-character barcode. Character values are determined from the integrated sub-character barcode feature evidence.
摘要翻译：公开了用于解码条形码的系统和方法。获取条形码的第一部分的扫描信号。存储条形码的集成子字符条形码的特征证据包括用于第一多个子字符条形码特征的第一多个可能的子字符条形码特征解释的证据。从扫描信号提取第二多个子字符条形码特征的子字符条形码特征测量。对于第二多个子字符条形码特征确定子字符条形码特征证据，包括第二多个子字符条形码特征的第二多个可能的子字符条形码特征解释的证据。集成子字符条形码的一部分特征证据是否对应于子字符条形码特征证据的一部分。子字符条形码特征证据集成到集成子字符条形码中。字符值由集成的子字符条形码特征证据确定。

5. 发明申请

US20140119665A1 SYSTEM AND METHOD FOR FINDING SADDLE POINT-LIKE STRUCTURES IN AN IMAGE AND DETERMINING INFORMATION FROM THE SAME 有权
标题翻译：用于在图像中发现类似点状结构的系统和方法以及从其确定信息
公开(公告)号：US20140119665A1
公开(公告)日：2014-05-01
申请号：US13797910
申请日：2013-03-12
申请人： COGNEX CORPORATION
发明人： Earle B. Stokes , Fenghua Jin , William M. Silver , Xiangyun Ye , Ivan A. Bachelder
IPC分类号： G06T7/00
CPC分类号： G06K9/2063 , G06K7/10861 , G06K7/10871 , G06K7/1417 , G06K7/1443 , G06K9/4604 , G06K9/4609 , G06K9/4623 , G06T7/60
摘要： This invention provides a system and method for finding features in images that exhibit saddle point-like structures using relatively computationally low-intensive processes, illustratively consisting of an anti-correlation process, and associated anti-correlation kernel, which operates upon a plurality of pixel neighborhoods within the image. This process enables an entire image to be quickly analyzed for any features that exhibit such saddle point-like structures by determining whether the anti-correlation kernel generates a weak or strong response in various positions within the image. The anti-correlation kernel is designed to generate a strong response regardless of the orientation of a saddle point-like structure. The anti-correlation process examines a plurality of pixel neighborhoods in the image, thereby locating any saddle point-like structures regardless of orientation, as it is angle-independent. The structures are then grouped and refined (for example in a grid) in an effort to locate and decode ID topologies within the image.
摘要翻译：本发明提供一种用于在图像中发现特征的系统和方法，该特征使用相对计算上的低密集过程表现出鞍点状结构，其示意性地由抗相关过程和相关联的反相关核组成，该相关反相内核基于多个像素图像内的社区。该过程使得能够通过确定反相关内核是否在图像内的各个位置中产生弱或强响应来呈现出诸如鞍点状结构的任何特征，从而快速分析整个图像。反相关核被设计成产生强烈的响应，而不管鞍点状结构的取向如何。反相关处理检查图像中的多个像素邻域，从而定位任何鞍状结构，而不管方位如何，因为它是与角度无关的。然后将结构分组和精化（例如，在网格中），以努力定位和解码图像内的ID拓扑。

6. 发明授权

US09946947B2 System and method for finding saddle point-like structures in an image and determining information from the same 有权
公开(公告)号：US09946947B2
公开(公告)日：2018-04-17
申请号：US13797910
申请日：2013-03-12
申请人： Cognex Corporation
发明人： Earle B. Stokes , Fenghua Jin , William M. Silver , Xiangyun Ye , Ivan A. Bachelder
IPC分类号： G06K9/50 , G06K9/20 , G06K7/14 , G06K9/46 , G06K7/10 , G06T7/60
CPC分类号： G06K9/2063 , G06K7/10861 , G06K7/10871 , G06K7/1417 , G06K7/1443 , G06K9/4604 , G06K9/4609 , G06K9/4623 , G06T7/60
摘要： This invention provides a system and method for finding features in images that exhibit saddle point-like structures using relatively computationally low-intensive processes, illustratively consisting of an anti-correlation process, and associated anti-correlation kernel, which operates upon a plurality of pixel neighborhoods within the image. This process enables an entire image to be quickly analyzed for any features that exhibit such saddle point-like structures by determining whether the anti-correlation kernel generates a weak or strong response in various positions within the image. The anti-correlation kernel is designed to generate a strong response regardless of the orientation of a saddle point-like structure. The anti-correlation process examines a plurality of pixel neighborhoods in the image, thereby locating any saddle point-like structures regardless of orientation, as it is angle-independent. The structures are then grouped and refined (for example in a grid) in an effort to locate and decode ID topologies within the image.

7. 发明申请

US20220318539A1 SYSTEM AND METHOD FOR AUTO-FOCUSING A VISION SYSTEM CAMERA ON BARCODES 有权
公开(公告)号：US20220318539A1
公开(公告)日：2022-10-06
申请号：US17567832
申请日：2022-01-03
申请人： Cognex Corporation
发明人： Ivan A. Bachelder , Chen Gao , Francisco Azcona Guerrero , Jose Fernandez Dorado , Esther Oteo Lozano , Andreas Weber
IPC分类号： G06K7/14 , H04N5/232 , G06K7/10
摘要： This invention provides a system and method for detecting and acquiring one or more in-focus images of one or more barcodes within the field of view of an imaging device. A measurement process measures depth-of-field of barcode detection. A plurality of nominal coarse focus settings of a variable lens allow sampling, in steps, of a lens adjustment range corresponding to allowable distances between the one or more barcodes and the image sensor, so that a step size of the sampling is less than a fraction of the depth-of-field of barcode detection. An acquisition process acquires a nominal coarse focus image for each nominal coarse focus setting. A barcode detection process detects one or more barcode-like regions and respective likelihoods. A fine focus process fine-adjusts, for each high-likelihood barcode, the variable lens near a location of the barcode-like regions. The process acquires an image for decoding using the fine adjusted setting.

8. 发明申请

US20200034591A1 SYSTEM AND METHOD FOR AUTO-FOCUSING A VISION SYSTEM CAMERA ON BARCODES 审中-公开
公开(公告)号：US20200034591A1
公开(公告)日：2020-01-30
申请号：US16043716
申请日：2018-07-24
申请人： Cognex Corporation
发明人： Ivan A. Bachelder , Chen Gao , Francisco Azcona Guerrero , Jose Fernandez Dorado , Esther Oteo Lozano , Andreas Weber
IPC分类号： G06K7/14 , H04N5/232 , G06K7/10
摘要： This invention provides a system and method for detecting and acquiring one or more in-focus images of one or more barcodes within the field of view of an imaging device. A measurement process measures depth-of-field of barcode detection. A plurality of nominal coarse focus settings of a variable lens allow sampling, in steps, of a lens adjustment range corresponding to allowable distances between the one or more barcodes and the image sensor, so that a step size of the sampling is less than a fraction of the depth-of-field of barcode detection. An acquisition process acquires a nominal coarse focus image for each nominal coarse focus setting. A barcode detection process detects one or more barcode-like regions and respective likelihoods. A fine focus process fine-adjusts, for each high-likelihood barcode, the variable lens near a location of the barcode-like regions. The process acquires an image for decoding using the fine adjusted setting.

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