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公开(公告)号：US20220011097A1
公开(公告)日：2022-01-13
申请号：US17294635
申请日：2019-11-18
发明人： Rongguang Liang , Junchao Zhang , Xiaobo Tian , Jianbo Shao
摘要： Methods, apparatus and systems for processing interferograms in metrology applications are described. In one example aspect, a method includes obtaining an input phase image based on the interferograms, segmenting the input phase image by classifying the input phase image into multiple regions based on the phase value and a location of each pixel, assigning an integer value to each of the multiple regions, and constructing an output phase image based on the input phase image and the phase offset of each of the multiple regions.
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公开(公告)号：US10730336B2
公开(公告)日：2020-08-04
申请号：US16066185
申请日：2016-12-23
发明人： Philippe Dietemann
IPC分类号： B42D25/342 , B42D25/351 , B42D25/305 , G07D7/207 , G07D7/00 , B42D25/373 , B42D25/378 , G06K9/32 , G06K9/82 , B42D25/328 , B42D25/355 , B42D25/364
摘要： A secure item including a first optical structure and a second optical structure, or an assembly comprising a secure item and another object. The first optical structure including a plurality of blocks and being one of a revealing screen and a combined image. The second optical structure being the other one. Each of the combined image blocks being made up of a plurality of interlaced images. The combined image or each combined image block including a periodic alternation of interlaced image elements. The elements of the interlaced images of a single interlaced image being the same color, but a different color from that of the other interlaced images. At least two blocks of the first optical structure each allowing the observation of a revealed image in each block of a first optical structure, showing different proportions of the interlaced images.
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公开(公告)号：US10445608B2
公开(公告)日：2019-10-15
申请号：US15792975
申请日：2017-10-25
发明人： Mina Kim , Rahul B. Desai , Rohan S. Prabhu , Kevin O. Foy
摘要： A method, a device, and a computer program product for identifying objects in image data. The device is enabled to, in response to determining that an object type of a first set of object types is represented in the image data, indicate that the object type is represented in captured image data. The device is further enabled to, in response to determining that no object type of the first set of object types is represented in the image data, determine whether the image data comprises an object characteristic of a specific one of a second set of object types. The device is further enabled to, in response to determining that the image data comprises an object characteristic of the specific one of the second set of object types, indicate that the image data comprises an object characteristic of the specific one of the second set of object types.
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公开(公告)号：US6091845A
公开(公告)日：2000-07-18
申请号：US28878
申请日：1998-02-24
申请人： Christophe Pierrat , James Burdorf
发明人： Christophe Pierrat , James Burdorf
IPC分类号： G01N21/956 , G03F1/84 , G03F7/20 , G06T7/00 , G06K9/82
CPC分类号： G06T7/0006 , G01N21/95607 , G03F1/84 , G03F7/70483 , G06T2207/30148
摘要： An improved technique for inspecting photomasks employs simulated images of the resist pattern. A simulated image of an original pattern is compared to a simulated image generated from a pattern captured from a photomask manufactured from the original pattern. Alternatively, simulated images generated from captured data from two different instances of the same original pattern formed in a photomask are compared.
摘要翻译： 用于检查光掩模的改进技术使用抗蚀剂图案的模拟图像。 将原始图案的模拟图像与从由原始图案制造的光掩模捕获的图案生成的模拟图像进行比较。 或者，比较从在光掩模中形成的相同原始图案的两个不同实例的捕获数据生成的模拟图像。
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5.发明授权Automated recognition of characters using optical filtering with maximum uncertainty - minimum variance (MUMV) functions 失效使用最大不确定度 - 最小方差（MUMV）功能的光学滤波自动识别字符
公开(公告)号：US5371808A
公开(公告)日：1994-12-06
申请号：US882926
申请日：1992-05-14
申请人： Charles L. Wilson , James L. Blue
发明人： Charles L. Wilson , James L. Blue
CPC分类号： G06K9/82
摘要： A method and apparatus is described for recognition of hand printed characters using maximum uncertainty--minimum variance (MUMV) functions, such as Gabor functions, implemented by optical elements. A set of optical elements having varying optical density corresponding to a set of two-dimensional MUMV functions is generated. A pattern of illumination responsive to the image of the character to be identified is simultaneously transmitted through each of the optical elements implementing the MUMV functions. The amount of light transmitted through each of the elements is measured, providing a transmission coefficient. Such transmission coefficients are used as a set of inputs to a neural network, such that the inputs to the neural network are a set of transmission coefficients resulting from transmission of light corresponding to a character to be identified through a complete set of optical elements implementing a set of two-dimensional MUMV functions. The neural network calculates weighted sums of the transmission coefficients. The neural network may be implemented as a network of resistors connected between input nodes, intermediate nodes, and output nodes. The output node having the highest voltage identifies the character to be identified.
摘要翻译： 描述了使用由光学元件实现的最大不确定性 - 最小方差（MUMV）函数（诸如Gabor函数）来识别手印字符的方法和装置。 产生具有对应于一组二维MUMV功能的具有变化的光密度的一组光学元件。 响应于要识别的字符的图像的照明模式通过实现MUMV功能的每个光学元件同时传输。 测量透过每个元件的光量，提供透射系数。 这样的传输系数被用作神经网络的一组输入，使得到神经网络的输入是由对应于要通过完整的一组光学元件识别的字符的光的传输而产生的一组传输系数， 一套二维MUMV功能。 神经网络计算传输系数的加权和。 神经网络可以被实现为连接在输入节点，中间节点和输出节点之间的电阻网络。 具有最高电压的输出节点识别要识别的字符。
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6.发明授权
公开(公告)号：US4462046A
公开(公告)日：1984-07-24
申请号：US394812
申请日：1982-07-02
申请人： Carl Spight
发明人： Carl Spight
CPC分类号： G06K9/82
摘要： An object or scene viewed by the programmable optical processor based machine vision system is converted into a video signal representative of a spatial orientation and position of a viewed object being viewed. Reference information stored within a system control processor and indicative of a desired object to be identified and its spatial orientation and position of is used to produce a reference video signal. Both the object video signal representative of the object being viewed and the reference video signal representative of the desired object to be identified are converted into incoherent optical representations of these signals which are optically parallel processed in order to obtain a cross-correlation of the respective signals. This cross-correlation is converted into an electrical signal and is evaluated using any suitable known correlation evaluation technique in order to determine whether a high degree of correlation exists between the object being viewed and its position and orientation and the reference signal indicative of a desired object to be identified and its orientation. If a high degree of correlation exists, the effector control processor is provided with information related to the object so that the effector control processor may control a robotic manipulator in a desired manner. If a high degree of correlation does not exist between the respective signals, new object signal or reference signal information related to the object being viewed is iteratively correlated with the remaining original signal in order to determine the degree of correlation between these two signals.
摘要翻译： 由基于可编程光学处理器的机器视觉系统观看的对象或场景被转换为表示被观看对象的空间取向和位置的视频信号。 存储在系统控制处理器内并指示要识别的期望对象及其空间取向和位置的参考信息用于产生参考视频信号。 表示正在观看的对象的对象视频信号和表示要识别的期望对象的参考视频信号被转换成光学并行处理的这些信号的非相干光学表示，以便获得各个信号的互相关 。 这种互相关被转换成电信号，并且使用任何合适的已知相关性评估技术进行评估，以便确定被观察对象与其位置和取向之间是否存在高度的相关性以及指示所需对象的参考信号 被确定及其方向。 如果存在高度的相关性，则向效能器控制处理器提供与该对象相关的信息，使得效应器控制处理器可以以期望的方式控制机器人操纵器。 如果各个信号之间不存在高度的相关性，则与被观察对象相关的新对象信号或参考信号信息与剩余的原始信号迭代地相关，以便确定这两个信号之间的相关程度。
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公开(公告)号：US4387989A
公开(公告)日：1983-06-14
申请号：US171614
申请日：1980-07-23
申请人： Andrew R. Pirich
发明人： Andrew R. Pirich
CPC分类号： G06K9/82
摘要： A coherent optical feature identifier apparatus utilizing an optical data gathering system in conjunction with a digital data correlator unit to recognize uninterpretable features on photographs. A dual visual display is utilized to compare a desired feature with the Fourier transform correlation from the comparator storage unit.
摘要翻译： 一种相干光学特征标识符装置，其利用与数字数据相关器单元结合的光学数据采集系统来识别照片上的不可解释的特征。 利用双重视觉显示器将期望的特征与来自比较器存储单元的傅立叶变换相关性相比较。
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公开(公告)号：US4352559A
公开(公告)日：1982-10-05
申请号：US152636
申请日：1980-05-23
摘要： Apparatus for performing tests for determining the validity of a paper purported to be a valid instrument is presented. Fundamentally, the invention comprises a tray for receiving a paper offered as a valid instrument and maintaining the same in sliding relationship between a light source and reticle. A photocell is operatively connected to the reticle and senses light passing from the light source and through the paper and reticle. The output of the photocell is applied to an operational amplifier having a dynamic feedback network and the output of this amplifier is characteristic of both a grid pattern upon the paper and the optical density thereof. This output is then passed to an amplifier circuit which establishes an optical density domain and is operative to pass a signal only if the paper falls within such domain. This output is then passed to appropriate integrating and comparator circuitry to ultimately determine the validity of the paper.
摘要翻译： 呈现用于确定被认为是有效仪器的纸张的有效性的测试的装置。 本发明基本上包括用于接收作为有效仪器提供的纸并将其保持在光源和标线片之间的滑动关系的托盘。 光电管可操作地连接到掩模版并且感测从光源通过纸和光罩的光。 光电管的输出被施加到具有动态反馈网络的运算放大器，并且该放大器的输出是纸上的网格图案和其光密度两者的特征。 然后，该输出被传递到建立光密度域的放大器电路，并且仅当纸落入该域内时才能使信号传递。 然后将该输出传递给适当的积分和比较器电路，以最终确定纸张的有效性。
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公开(公告)号：US4308521A
公开(公告)日：1981-12-29
申请号：US11585
申请日：1979-02-12
申请人： David P. Casasent , Demetri Psaltis
发明人： David P. Casasent , Demetri Psaltis
CPC分类号： G06K9/82
摘要： A multiple-invariant, space variant optical processor in which two functions described by any number of separate distortion parameters can be correlated with no loss in signal-to-noise ratio of the correlation. The unknown distortion parameters can also be determined in this scheme. Experimental confirmation of the key step, determination of the non-linear phase portion of a complex optical transform can be provided.
摘要翻译： 一种多不变的空间变异光学处理器，其中通过任何数量的分离的失真参数描述的两个功能可以与相关的信噪比没有损失相关联。 未知的失真参数也可以在该方案中确定。 可以提供关键步骤的实验确认，确定复杂光学变换的非线性相位部分。
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公开(公告)号：US11082581B2
公开(公告)日：2021-08-03
申请号：US16653866
申请日：2019-10-15
发明人： Reiji Misawa
IPC分类号： H04N1/40 , G06K9/20 , G06K9/44 , H04N1/405 , H04N1/00 , G06K9/82 , G06T5/00 , G06K9/00 , G06K9/46 , H04N1/60
摘要： An image processing apparatus includes a reading unit configured to read an image of a document and generate image data, a first binarization unit configured to generate binary image data by performing halftone processing on the image data generated by the reading unit, a smoothing unit configured to perform smoothing processing on a character region of the binary image data, a second binarization unit configured to perform binarization processing on the character region having been subjected to the smoothing processing by the smoothing unit, and a character recognition unit configured to perform character recognition processing on the character region having been subjected to the binarization processing by the second binarization unit.
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