公开(公告)号：US07329852B2

公开(公告)日：2008-02-12

申请号：US11487777

申请日：2006-07-17

Applicant: Canwen Liu

Inventor： Canwen Liu

IPC: H01L31/00

CPC classification number: G01N30/8641 ,  G01N21/274 ,  G01N2201/12784 ,  G06T5/002

Abstract: Automatic background signal removal for input data, such as for spectrometry data, is provided. Input data includes input pixel points, such as those read by a CCD spectrometer or chromatography device, and intensity values corresponding to the data points. A distribution of changes in the intensity values between the data points is determined, and a noise level is judged by setting a threshold for the distribution. A noise region is identified as a predetermined number of consecutive input points for which the changes in the intensity values are within the noise level. Adjacent noise regions may be connected and the background signal is thus determined and subtracted. A spike noise region may also be identified and filtered, such that a peak obtained from fewer than a second predetermined number of the pixel points is determined as a spike, not a true peak. Non-spike large amplitude noises are optionally filtered.

Abstract translation: 提供输入数据的自动背景信号去除，如光谱数据。 输入数据包括诸如由CCD光谱仪或色谱装置读取的像素点和对应于数据点的强度值的输入像素点。 确定数据点之间强度值变化的分布，并通过设定分配阈值来判断噪声水平。 噪声区域被识别为强度值的变化在噪声水平内的预定数量的连续输入点。 可以连接相邻的噪声区域，从而确定并减去背景信号。 也可以识别和滤波尖峰噪声区域，使得从少于第二预定数量的像素点获得的峰值被确定为尖峰，而不是真峰值。 可选地过滤非尖峰大振幅噪声。

公开(公告)号：US10018561B2

公开(公告)日：2018-07-10

申请号：US14420101

申请日：2013-07-23

Applicant: PerkinElmer Singapore PTE Ltd

Inventor： Robert Alan Hoult

IPC: G01N21/62 ,  G01J3/28 ,  G01N21/27 ,  G01N21/552

CPC classification number: G01N21/62 ,  G01J3/28 ,  G01N21/274 ,  G01N21/552 ,  G01N2201/1218 ,  G01N2201/12784

Abstract: A method of using a spectrometer to produce corrected diamond Attenuated Total Reflectance (ATR) spectral data includes acquiring, using the spectrometer, an initial set of ATR spectral data for a sample pressed into contact with a diamond ATR crystals; numerically matching, using the spectrometer, a pressure dependent diamond artifact reference spectrum to a corresponding pressure dependent diamond artifact in the initial set of ATR spectral data; and numerically subtracting out the numerically matched pressure dependent diamond artifact reference spectrum from the initial set of ATR spectral data to yield a corrected set of ATR spectral data for the sample for output by the spectrometer.

公开(公告)号：US20230266236A1

公开(公告)日：2023-08-24

申请号：US18173035

申请日：2023-02-22

Applicant: Hyperspectral Corp.

Inventor： Euan Mowat ,  Matthew Theurer ,  Sarah Rachel Hernandez ,  Mario Martinez

IPC: G01N21/31 ,  G01N21/27

CPC classification number: G01N21/314 ,  G01N21/274 ,  G01N2021/317 ,  G01N2201/12784 ,  G01N2201/0484 ,  G01N2201/061 ,  G01N2021/0125

Abstract: An example system includes a light intensity measuring apparatus couplable to a food processing apparatus and a computing system. The light intensity measuring apparatus includes a chamber configured to receive a water sample from the food processing apparatus, a light source, a detector configured to detect light that has passed through the water sample and measure multiple times intensities of wavelengths of the light to obtain multiple sets of measured intensities of wavelengths, and a communication module configured to provide the multiple sets of measured intensities of wavelengths. The computing system may receive the multiple sets of measured intensities, process the multiple sets to obtain a set of values, apply a first set of decision trees to the set of values to obtain a first result indicating a positive or negative foodborne pathogen detection, generate a notification indicating either the positive of negative detection, and provide the notification.

公开(公告)号：US5347474A

公开(公告)日：1994-09-13

申请号：US762396

申请日：1991-09-19

Applicant: Jacob Y. Wong

Inventor： Jacob Y. Wong

IPC: G01N21/27 ,  G01N21/35 ,  G06F15/20

CPC classification number: G01N21/274 ,  G01N21/3504 ,  G01N2201/12753 ,  G01N2201/12784

Abstract: Some cyclic variables include within each cycle a value that can be determined extrinsically. In such case, the sensed value may differ from the known value by an amount that is a combination of long-term drift of the sensor and random measuring error. The drift component can be evaluated and eliminated by the following method. Once each cycle, for a number of cycles, the sensor measures the variable at a time when its value should equal the extrinsically-known value. The differences are plotted versus time, and a best-fitting straight line is determined, which indicates the drift. Throughout the next cycle as the variable is continuously sensed, the drift determined from the best-fitting straight line is continuously applied to correct the sensed value.

Abstract translation: 一些循环变量包括在每个周期内可以通过外部确定的值。 在这种情况下，感测值可以与已知值不同，该量是传感器的长期漂移与随机测量误差的组合。 可以通过以下方法评估和消除漂移部件。 每个循环一次，在多个循环中，传感器在其值应等于外部已知值的时候测量变量。 差异相对于时间作图，并且确定最佳拟合直线，其指示漂移。 在连续感测变量的整个下一个循环中，连续施加从最佳拟合直线确定的漂移以校正感测值。

公开(公告)号：US20230160812A1

公开(公告)日：2023-05-25

申请号：US18151632

申请日：2023-01-09

Applicant: VIAVI Solutions Inc.

Inventor： Lan SUN ,  Changmeng HSIUNG

IPC: G01N21/27 ,  G06F17/18

CPC classification number: G01N21/274 ,  G06F17/18 ,  G01N2201/12753 ,  G01N2201/12769 ,  G01N2201/12784

Abstract: A device may obtain a master beta coefficient of a master calibration model associated with a master instrument. The master beta coefficient may be at a grid of a target instrument. The device may perform constrained optimization of an objective function, in accordance with a set of constraints, in order to determine a pair of transferred beta coefficients. The constrained optimization may be performed based on an initial pair of transferred beta coefficients, the master beta coefficient, and spectra associated with a scouting set. The device may determine, based on the pair of transferred beta coefficients, a transferred beta coefficient. The device may determine a final transferred beta coefficient based on a set of transferred beta coefficients including the transferred beta coefficient. The final transferred beta coefficient may be associated with generating a transferred calibration model, corresponding to the master calibration model, for use by the target instrument.

公开(公告)号：US20060255249A1

公开(公告)日：2006-11-16

申请号：US11487777

申请日：2006-07-17

Applicant: Canwen Liu

Inventor： Canwen Liu

IPC: G06M7/00

CPC classification number: G01N30/8641 ,  G01N21/274 ,  G01N2201/12784 ,  G06T5/002

Abstract: Automatic background signal removal for input data, such as for spectrometry data, is provided. Input data includes input pixel points, such as those read by a CCD spectrometer or chromatography device, and intensity values corresponding to the data points. A distribution of changes in the intensity values between the data points is determined, and a noise level is judged by setting a threshold for the distribution. A noise region is identified as a predetermined number of consecutive input points for which the changes in the intensity values are within the noise level. Adjacent noise regions may be connected and the background signal is thus determined and subtracted. A spike noise region may also be identified and filtered, such that a peak obtained from fewer than a second predetermined number of the pixel points is determined as a spike, not a true peak. Non-spike large amplitude noises are optionally filtered.

Abstract translation: 提供输入数据的自动背景信号去除，如光谱数据。 输入数据包括诸如由CCD光谱仪或色谱装置读取的像素点和对应于数据点的强度值的输入像素点。 确定数据点之间强度值变化的分布，并通过设定分配阈值来判断噪声水平。 噪声区域被识别为强度值的变化在噪声水平内的预定数量的连续输入点。 可以连接相邻的噪声区域，从而确定并减去背景信号。 也可以识别和滤波尖峰噪声区域，使得从少于第二预定数量的像素点获得的峰值被确定为尖峰，而不是真峰值。 可选地过滤非尖峰大振幅噪声。

公开(公告)号：US20050285023A1

公开(公告)日：2005-12-29

申请号：US10874420

申请日：2004-06-23

Applicant: Canwen Liu

Inventor： Canwen Liu

IPC: G01N21/27 ,  G01N30/86 ,  G06M7/00 ,  G06T5/00

CPC classification number: G01N30/8641 ,  G01N21/274 ,  G01N2201/12784 ,  G06T5/002

Abstract: Automatic background signal removal for input data, such as for spectrometry data, is provided. Input data includes input pixel points, such as those read by a CCD spectrometer of chromatography device, and intensity values corresponding to the data points. A distribution of changes in the intensity values between the data points is determined, and a noise level is judged by setting a threshold for the distribution. A noise region is identified as a predetermined number of consecutive input points for which the changes in the intensity values are within the noise level. Adjacent noise regions may be connected and the background signal is thus determined and subtracted. A spike noise region may also be identified and filtered, such that a peak obtained from fewer than a second predetermined number of the pixel points is determined as a spike, not a true peak. Non-spike large amplitude noises are optionally filtered.

Abstract translation: 提供输入数据的自动背景信号去除，如光谱数据。 输入数据包括诸如由色谱装置的CCD光谱仪读取的输入像素点和对应于数据点的强度值。 确定数据点之间强度值变化的分布，并通过设定分配阈值来判断噪声水平。 噪声区域被识别为强度值的变化在噪声水平内的预定数量的连续输入点。 可以连接相邻的噪声区域，从而确定并减去背景信号。 也可以识别和滤波尖峰噪声区域，使得从少于第二预定数量的像素点获得的峰值被确定为尖峰，而不是真峰值。 可选地过滤非尖峰大振幅噪声。

公开(公告)号：US20240264077A1

公开(公告)日：2024-08-08

申请号：US18567571

申请日：2022-06-10

Applicant: Senseair AB

Inventor： Cheng Yang ,  Tobias Oechtering ,  You Yang

IPC: G01N21/3504 ,  G01N21/27

CPC classification number: G01N21/3504 ,  G01N21/274 ,  G01N2201/12784

Abstract: A computer implemented method and a gas sensor device comprising a spectroscopic sensing unit (2), a memory (3) and a control unit (4), is described. The control unit (4) is configured to output calibrated values, which are measures of a concentration of a gas component measured by the spectroscopic sensing unit (2), wherein the calibrated values are determined from measurement values obtained from the spectroscopic sensing unit (2) and a baseline calibration parameter retrieved from the memory (3). The control unit is configured to update the baseline calibration parameter (zero) by identifying the minimum measurement value obtained during a predetermined first time period (14), obtaining a time for the first time period (14), obtaining a model value corresponding to the obtained time, determining an updated baseline calibration parameter based on the minimum measurement value and the model value, and updating the baseline calibration parameter stored in the memory (3).

公开(公告)号：US20150177142A1

公开(公告)日：2015-06-25

申请号：US14420101

申请日：2013-07-23

Applicant: PerkinElmer Singapore PTE Ltd

Inventor： Robert Alan Hoult

IPC: G01N21/62 ,  G01J3/28

CPC classification number: G01N21/62 ,  G01J3/28 ,  G01N21/274 ,  G01N21/552 ,  G01N2201/1218 ,  G01N2201/12784

Abstract: A method of using a spectrometer to produce corrected diamond Attenuated Total Reflectance (ATR) spectral data includes acquiring, using the spectrometer, an initial set of ATR spectral data for a sample pressed into contact with a diamond ATR crystals; numerically matching, using the spectrometer, a pressure dependent diamond artefact reference spectrum to a corresponding pressure dependent diamond artefact in the initial set of ATR spectral data; and numerically subtracting out the numerically matched pressure dependent diamond artefact reference spectrum from the initial set of ATR spectral data to yield a corrected set of ATR spectral data for the sample for output by the spectrometer.

Abstract translation: 使用光谱仪产生校正的菱形衰减全反射（ATR）光谱数据的方法包括采用光谱仪获取与菱形ATR晶体接触的样品的初始ATR光谱数据集; 使用光谱仪将压力依赖金刚石假象参考光谱数值匹配到初始ATR光谱数据集中相应的压力依赖金刚石伪影; 并从初始的ATR光谱数据集中数字地减去与数字匹配的压力相关金刚石伪像参考光谱，以产生用于由光谱仪输出的样品的校正的ATR光谱数据集。

公开(公告)号：US4837450A

公开(公告)日：1989-06-06

申请号：US259414

申请日：1988-10-18

Applicant: Seiichiro Satomura ,  Masahide Kotera

Inventor： Seiichiro Satomura ,  Masahide Kotera

IPC: G01N21/59 ,  H04N1/403

CPC classification number: H04N1/403 ,  G01N21/5911 ,  G01N2021/5946 ,  G01N2201/12784

Abstract: An apparatus for reading a microfilmed image to obtain digital image signal, in which the level of quantizing is determined by measuring the density of image and of background.

Abstract translation: 一种用于读取缩微胶卷图像以获得数字图像信号的装置，其中通过测量图像和背景的密度来确定量化水平。