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1. 发明授权

US08818130B2 Geometric parameter measurement of an imaging device 有权
标题翻译：成像装置的几何参数测量
公开(公告)号：US08818130B2
公开(公告)日：2014-08-26
申请号：US12275963
申请日：2008-11-21
申请人： David Morgan-Mar , Stephen James Hardy , Matthew R Arnison , Kieran Gerard Larkin , Christine Anne Deller
发明人： David Morgan-Mar , Stephen James Hardy , Matthew R Arnison , Kieran Gerard Larkin , Christine Anne Deller
IPC分类号： G06K9/00 , G06K9/36 , G06K9/62 , H04N17/00 , H04N17/02 , G01D18/00 , G01D21/00 , G01P21/00 , G01R35/00
CPC分类号： H04N17/002 , G06K9/3216 , G06T5/006 , H04N1/00827
摘要： Disclosed is a method of determining at least one three-dimensional (3D) geometric parameter of an imaging device. A two-dimensional (2D) target image is provided having a plurality of alignment patterns. The target image is imaged with an imaging device to form a captured image. At least one pattern of the captured image is compared with a corresponding pattern of the target image. From the comparison, the geometric parameter of the imaging device is then determined. The alignment patterns include at least one of (i) one or more patterns comprising a 2D scale and rotation invariant basis function, (ii) one or more patterns comprising a 1D scale invariant basis function, and (iii) one or more patterns having a plurality of grey levels and comprising a plurality of superimposed sinusoidal patterns, the plurality of sinusoidal patterns having a plurality of predetermined discrete orientations. Also disclosed is a two-dimensional test chart for use in testing an imaging device, the test chart comprising a plurality of alignment patterns, at least one of said alignment patterns including one of those patterns mentioned above.
摘要翻译：公开了一种确定成像装置的至少一个三维（3D）几何参数的方法。提供具有多个对准图案的二维（2D）目标图像。用成像装置成像目标图像以形成捕获的图像。拍摄图像的至少一个图案与目标图像的相应图案进行比较。从比较中，然后确定成像装置的几何参数。对准图案包括（i）包括2D刻度和旋转不变基函数的一个或多个图案中的至少一个，（ii）包括1D尺度不变基函数的一个或多个图案，以及（iii）一个或多个图案，其具有多个灰度级并且包括多个叠加的正弦图案，所述多个正弦图案具有多个预定的离散取向。还公开了用于测试成像装置的二维测试图，测试图包括多个对准图案，至少一个所述对准图案包括上述那些图案之一。

2. 发明申请

US20090161945A1 Geometric parameter measurement of an imaging device 有权
标题翻译：成像装置的几何参数测量
公开(公告)号：US20090161945A1
公开(公告)日：2009-06-25
申请号：US12275963
申请日：2008-11-21
申请人： David Morgan-Mar , Stephen James Hardy , Matthew R. Arnison , Kieran Gerard Larkin , Christine Anne Deller
发明人： David Morgan-Mar , Stephen James Hardy , Matthew R. Arnison , Kieran Gerard Larkin , Christine Anne Deller
IPC分类号： G06K9/00 , H04N17/00 , H04N1/00
CPC分类号： H04N17/002 , G06K9/3216 , G06T5/006 , H04N1/00827
摘要： Disclosed is a method of determining at least one three-dimensional (3D) geometric parameter of an imaging device. A two-dimensional (2D) target image is provided having a plurality of alignment patterns. The target image is imaged with an imaging device to form a captured image. At least one pattern of the captured image is compared with a corresponding pattern of the target image. From the comparison, the geometric parameter of the imaging device is then determined. The alignment patterns include at least one of (i) one or more patterns comprising a 2D scale and rotation invariant basis function, (ii) one or more patterns comprising a 1D scale invariant basis function, and (iii) one or more patterns having a plurality of grey levels and comprising a plurality of superimposed sinusoidal patterns, the plurality of sinusoidal patterns having a plurality of predetermined discrete orientations. Also disclosed is a two-dimensional test chart for use in testing an imaging device, the test chart comprising a plurality of alignment patterns, at least one of said alignment patterns including one of those patterns mentioned above.
摘要翻译：公开了一种确定成像装置的至少一个三维（3D）几何参数的方法。提供具有多个对准图案的二维（2D）目标图像。用成像装置成像目标图像以形成捕获的图像。拍摄图像的至少一个图案与目标图像的相应图案进行比较。从比较中，然后确定成像装置的几何参数。对准图案包括（i）包括2D刻度和旋转不变基函数的一个或多个图案中的至少一个，（ii）包括1D尺度不变基函数的一个或多个图案，以及（iii）一个或多个图案，其具有多个灰度级并且包括多个叠加的正弦图案，所述多个正弦图案具有多个预定的离散取向。还公开了用于测试成像装置的二维测试图，测试图包括多个对准图案，至少一个所述对准图案包括上述那些图案之一。

3. 发明授权

US09836855B2 Determining a depth map from images of a scene 有权
公开(公告)号：US09836855B2
公开(公告)日：2017-12-05
申请号：US13606822
申请日：2012-09-07
申请人： David Morgan-Mar , Tuan Quang Pham , Matthew R Arnison , Kieran Gerard Larkin
发明人： David Morgan-Mar , Tuan Quang Pham , Matthew R Arnison , Kieran Gerard Larkin
IPC分类号： G06T7/571 , H04N13/02 , G06T7/00
CPC分类号： G06T7/571 , G06T2207/10148
摘要： A technique determines a depth measurement associated with a scene captured by an image capture device. The technique receives at least first and second images of the scene, in which the first image is captured using at least one different camera parameter than that of the second image. At least first and second image patches are selected from the first and second images, respectively, the selected patches corresponding to a common part of the scene. The selected image patches are used to determine which of the selected image patches provides a more focused representation of the common part. At least one value is calculated based on a combination of data in the first and second image patches, the combination being dependent on the more focused image patch. The depth measurement of the common part of the scene is determined from the at least one calculated value.

4. 发明申请

US20130063566A1 DETERMINING A DEPTH MAP FROM IMAGES OF A SCENE 有权
标题翻译：从场景图像中确定深度图
公开(公告)号：US20130063566A1
公开(公告)日：2013-03-14
申请号：US13606822
申请日：2012-09-07
申请人： David Morgan-Mar , Tuan Quang Pham , Matthew R. Arnison , Kieran Gerard Larkin
发明人： David Morgan-Mar , Tuan Quang Pham , Matthew R. Arnison , Kieran Gerard Larkin
IPC分类号： H04N13/02
CPC分类号： G06T7/571 , G06T2207/10148
摘要： A technique determines a depth measurement associated with a scene captured by an image capture device. The technique receives at least first and second images of the scene, in which the first image is captured using at least one different camera parameter than that of the second image. At least first and second image patches are selected from the first and second images, respectively, the selected patches corresponding to a common part of the scene. The selected image patches are used to determine which of the selected image patches provides a more focused representation of the common part. At least one value is calculated based on a combination of data in the first and second image patches, the combination being dependent on the more focused image patch. The depth measurement of the common part of the scene is determined from the at least one calculated value.
摘要翻译：技术确定与由图像捕获设备捕获的场景相关联的深度测量。该技术至少接收场景的第一和第二图像，其中利用与第二图像相比不同的相机参数捕获第一图像。分别从第一和第二图像中选择至少第一和第二图像补丁，所选择的补丁对应于场景的公共部分。所选择的图像补丁用于确定所选择的图像补丁中的哪一个提供了公共部分的更集中的表示。基于第一和第二图像补丁中的数据的组合来计算至少一个值，该组合取决于更聚焦的图像补丁。从所述至少一个计算值确定场景的公共部分的深度测量。

5. 发明申请

US20090003601A1 ALPHA-MASKED IMAGE MATCHING 审中-公开
标题翻译： ALPHA-MASKED图像匹配
公开(公告)号：US20090003601A1
公开(公告)日：2009-01-01
申请号：US12145963
申请日：2008-06-25
申请人： Stephen James Hardy , Kieran Gerard Larkin , Stephen Farrar , Peter Alleine Fletcher , Tuan Quang Pham
发明人： Stephen James Hardy , Kieran Gerard Larkin , Stephen Farrar , Peter Alleine Fletcher , Tuan Quang Pham
IPC分类号： H04L9/10
CPC分类号： G09C5/00
摘要： A method and system is disclosed for authenticating a physical medium (1405). The method starts by retrieving (1406) a reference digital signature (1412) previously determined (1403) based upon visual characteristics of an area (1402) of a reference physical medium (1400). A candidate digital signature (1415) is determined based upon visual characteristics of an area (1408) of the physical medium (1405), the area (1408) of the physical medium (1405) being at least partly corresponding to the area (1402) of the reference physical medium (1400). Weight values associated with different parts of at least one of the areas (1402 and 1408) are determined (201). Finally, the candidate digital signature (1415) is compared (1420) with the reference digital signature (1412), wherein the contributing of the parts in the comparison (1420) is based upon the weight values.
摘要翻译：公开了用于认证物理介质（1405）的方法和系统。该方法通过基于参考物理介质（1400）的区域（1402）的视觉特征来检索（1406）先前确定的参考数字签名（1402）（1403）。基于物理介质（1405）的区域（1408）的视觉特性确定候选数字签名（1415），物理介质（1405）的区域（1408）至少部分地对应于区域（1402）的参考物理介质（1400）。确定与区域（1402和1408）中的至少一个区域的不同部分相关联的重量值（201）。最后，将候选数字签名（1415）与参考数字签名（1412）进行比较，其中比较（1420）中的部分的贡献基于权重值。

6. 发明授权

US07313249B2 Mark embedding and detection using projective transforms 失效
标题翻译：使用投影变换标记嵌入和检测
公开(公告)号：US07313249B2
公开(公告)日：2007-12-25
申请号：US10660623
申请日：2003-09-12
申请人： Peter Alleine Fletcher , Stephen James Hardy , Kieran Gerard Larkin
发明人： Peter Alleine Fletcher , Stephen James Hardy , Kieran Gerard Larkin
IPC分类号： G06K9/00
CPC分类号： G06T1/0064 , G06T2201/0052 , H04N19/467
摘要： A method (200) is disclosed of detecting one or more patterns embedded in an image. Each pattern embedded in the image has been formed from a one-dimensional basis function. The method (200) starts by calculating (210) a projective transform of the image. A 1-D correlation is then calculated (220) between the projective transform and the basis function for a selection of angles. Finally, one or more peaks of the correlation are found (230). The position of each of the peaks provides spatial parameters of one of the one or more embedded patterns.
摘要翻译：公开了一种检测图像中嵌入的一个或多个图案的方法（200）。图像中嵌入的每个图案已经由一维基函数形成。方法（200）通过计算（210）图像的投影变换来开始。然后计算投影变换和角度选择的基函数之间的一维相关性（220）。最后，发现一个或多个相关峰（230）。每个峰的位置提供一个或多个嵌入图案之一的空间参数。

7. 发明授权

US08939540B2 Method of measuring printer characteristics 有权
标题翻译：测量打印机特性的方法
公开(公告)号：US08939540B2
公开(公告)日：2015-01-27
申请号：US12122270
申请日：2008-05-16
申请人： Peter Alleine Fletcher , Steven Parker , Ben Yip , Scott Alexander Rudkin , Kieran Gerard Larkin , Stephen James Hardy , Takeshi Yazawa
发明人： Peter Alleine Fletcher , Steven Parker , Ben Yip , Scott Alexander Rudkin , Kieran Gerard Larkin , Stephen James Hardy , Takeshi Yazawa
IPC分类号： B41J29/393
CPC分类号： B41J29/393
摘要： A method (300) is described of determining characteristic of an ink jet printer (15). A chart containing multiple regions or patches is printed (320) on a print medium (115) using the ink jet print (15). The chart includes at least a first region printed using a first set of nozzles, and at least a second region printed using a second set of nozzles. The first and second sets of nozzles are a predetermined distance apart in the printer head of the printer (15). The printing of the first and second regions is also separated by a print medium advance operation equal to the predetermined distance. This causes the first and second regions to be aligned in the direction of the print medium advance operation. The chart is then imaged using scanner (16) chart to form a chart image. The positions of the regions appearing in the chart image are next determined (340). The spatial alignment characteristic of the printer is calculated from the distance, in the medium advance direction, between said first and second regions.
摘要翻译：描述了确定喷墨打印机（15）的特性的方法（300）。使用喷墨打印（15）将包含多个区域或贴片的图形打印（320）在打印介质（115）上。该图表包括使用第一组喷嘴打印的至少第一区域，以及使用第二组喷嘴打印的至少第二区域。第一组和第二组喷嘴在打印机（15）的打印头中间隔预定距离。第一和第二区域的打印也通过等于预定距离的打印介质提前操作来分离。这使得第一和第二区域在打印介质提前操作的方向上对准。然后使用扫描仪（16）图表将图表成像，以形成图表图像。接下来确定出现在图表图像中的区域的位置（340）。打印机的空间对准特性是从介质前进方向到所述第一和第二区域之间的距离来计算的。

8. 发明授权

US07853098B2 Image registration method improvement 有权
标题翻译：图像配准方法改进
公开(公告)号：US07853098B2
公开(公告)日：2010-12-14
申请号：US10555446
申请日：2004-07-02
申请人： Stephen James Hardy , Peter Alleine Fletcher , Kieran Gerard Larkin
发明人： Stephen James Hardy , Peter Alleine Fletcher , Kieran Gerard Larkin
IPC分类号： G06K9/32
CPC分类号： G06T7/32
摘要： A method (200) of determining at least rotation and scale parameters of a transformation relating two images is disclosed. The method (200) starts by forming a spatial domain representation of each of the images that is invariant to translation of the images. A correlation in the log-polar domain is next performed between the representations. After detecting a magnitude peak in the correlation, the method (200) determines the rotation and scale parameters from the position of the magnitude peak.
摘要翻译：公开了至少确定关于两个图像的变换的旋转和缩放参数的方法（200）。方法（200）通过形成对图像的翻译不变的每个图像的空间域表示开始。接下来在表示之间执行对数极域中的相关性。在相关性中检测到幅度峰值之后，方法（200）从幅度峰值的位置确定旋转和比例参数。

9. 发明申请

US20090021551A1 METHOD OF MEASURING PRINTER CHARACTERISTICS 有权
公开(公告)号：US20090021551A1
公开(公告)日：2009-01-22
申请号：US12122270
申请日：2008-05-16
申请人： Peter Alleine Fletcher , Steven Parker , Ben Yip , Scott Alexander Rudkin , Kieran Gerard Larkin , Stephen James Hardy , Takeshi Yazawa
发明人： Peter Alleine Fletcher , Steven Parker , Ben Yip , Scott Alexander Rudkin , Kieran Gerard Larkin , Stephen James Hardy , Takeshi Yazawa
IPC分类号： B41J29/393
CPC分类号： B41J29/393
摘要： A method (300) is described of determining characteristic of an ink jet printer (15). A chart containing multiple regions or patches is printed (320) on a print medium (115) using the ink jet print (15). The chart includes at least a first region printed using a first set of nozzles, and at least a second region printed using a second set of nozzles. The first and second sets of nozzles are a predetermined distance apart in the printer head of the printer (15). The printing of the first and second regions is also separated by a print medium advance operation equal to the predetermined distance. This causes the first and second regions to be aligned in the direction of the print medium advance operation. The chart is then imaged using scanner (16) chart to form a chart image. The positions of the regions appearing in the chart image are next determined (340). The spatial alignment characteristic of the printer is calculated from the distance, in the medium advance direction, between said first and second regions.

10. 发明授权

US08090218B2 Imaging system performance measurement 有权
标题翻译：成像系统性能测量
公开(公告)号：US08090218B2
公开(公告)日：2012-01-03
申请号：US10598939
申请日：2005-03-30
申请人： Kieran Gerard Larkin , Peter Alleine Fletcher , Stephen James Hardy
发明人： Kieran Gerard Larkin , Peter Alleine Fletcher , Stephen James Hardy
IPC分类号： G06K9/36
CPC分类号： G06T7/001 , G06K9/6203 , G06T7/32 , G06T7/33
摘要： A method (1000) of measuring performance parameters of an imaging device (120, 160) is disclosed. The method (1000) maintains a test pattern image (1005), the test pattern image (1005) comprising alignment features and image analysis features. A test chart (110, 170) containing a representation of the test pattern image is next imaged using the imaging device (120, 160) to form a second image (1010). The test pattern image (1005) and the second image (1010) are then registered using region based matching (1035) operating on the alignment features. Finally, the performance parameters are measured by analysing (1060) the image analysis features.
摘要翻译：公开了一种测量成像装置（120,160）的性能参数的方法（1000）。方法（1000）维持测试图案图像（1005），测试图案图像（1005）包括对准特征和图像分析特征。接下来，使用成像装置（120,160）对包含测试图案图像的表示的测试图（110,170）进行成像，以形成第二图像（1010）。然后使用在对准特征上操作的基于区域的匹配（1035）来登记测试图案图像（1005）和第二图像（1010）。最后，通过分析（1060）图像分析特征来测量性能参数。

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