公开(公告)号：US10609313B2

公开(公告)日：2020-03-31

申请号：US15739556

申请日：2016-06-10

Applicant: ULIS

Inventor： Amaury Saragaglia ,  Alain Durand

IPC: H04N5/33 ,  H04N5/367 ,  H04N5/365

Abstract: The invention relates to a method for detecting bad pixels from a pixel array of a device, for capturing an image, that is sensitive to infrared radiation. The method includes: receiving an input image captured by the pixel system, and calculating a score for a plurality of target pixels including at least some of the pixels from the input image. The score for each target pixel is generated on the basis of k pixels of the input image that are selected in a window of H by H pixels around the target pixel. H is an odd integer greater than or equal to 3, and k is an integer between 2 and 5. Each pixel, from the set formed of the k pixels and the target pixel, share at least one border or corner with another pixel from said set, and the values of the k pixels are at respective distances from the value of the target pixel, the k pixels being selected on the basis of the k distances. The method also includes detecting that at least one of the target pixels is a bad pixel on the basis of the calculated scores.

公开(公告)号：US10015425B2

公开(公告)日：2018-07-03

申请号：US14695539

申请日：2015-04-24

Applicant: ULIS

Inventor： Amaury Saragaglia ,  Alain Durand

IPC: G01J1/44 ,  G01J5/22 ,  H04N3/09 ,  H04N5/365 ,  H04N5/33 ,  G01J5/24

CPC classification number: H04N5/3651 ,  G01J1/44 ,  G01J5/22 ,  G01J5/24 ,  G01J2001/444 ,  H04N3/09 ,  H04N5/33 ,  H04N5/365 ,  H04N5/3656

Abstract: The invention concerns a method of image processing involving: receiving, by a processing device, an input image (IB) captured by a pixel array sensitive to infrared radiation; determining, based on the input image and on a column component vector (VCOL), a first scale factor (α) by estimating a level of the column spread present in the input image; generating column offset values (α.VCOL(y)) based on the product of the first scale factor with the values of the vector; determining, based on the input image and on a 2D dispersion matrix (IDISP), a second scale factor (β) by estimating a level of the 2D dispersion present in the input image; generating pixel offset values (β.IDISP(x,y)) based on the product of the second scale factor with the values of the matrix; and generating a corrected image (IC′) by applying the column and pixel offset values.

公开(公告)号：US09581500B2

公开(公告)日：2017-02-28

申请号：US14340117

申请日：2014-07-24

Applicant: ULIS

Inventor： Alain Durand ,  Aurélie Touvignon

IPC: G06F11/30 ,  G01J5/20 ,  G01J5/22 ,  G01J5/00

CPC classification number: G01J5/20 ,  G01J5/22 ,  G01J2005/0048

Abstract: Method of diagnosing the state of signal-forming chains of a detector including an array of detection bolometers, each chain comprising a bolometer, a circuit of stimulation, and a circuit forming a signal according to said stimulation, including forming an image of a substantially uniform scene on the array; applying at least first and second stimulations to the chains; reading the formed signals; and for each chain in a predetermined set, defining a neighborhood of chains; calculating coefficients of a polynomial interpolating the values of signals formed by said chain; calculating, for each chain of the neighborhood, coefficients of a polynomial interpolating the values of signals formed by said neighborhood chain; calculating an average and standard deviation of said coefficients of the neighborhood chains or of the set of neighborhood chains and said chain; and diagnosing if said chain is defective using the coefficients and the calculated average and standard deviation.

Abstract translation: 诊断检测器的信号形成链的状态的方法，包括检测辐射热计的阵列，每条链包括测辐射热计，刺激电路和根据所述刺激形成信号的电路，包括形成基本均匀的图像 阵列上的场景; 将至少第一和第二刺激应用于链; 阅读形成的信号; 并且对于预定集合中的每个链，定义链的邻域; 计算内插由所述链形成的信号的值的多项式的系数; 对所述邻域的每个链计算对由所述邻域链形成的信号的值进行内插的多项式的系数; 计算邻近链或邻近链和所述链集合的所述系数的平均和标准偏差; 并使用系数和计算的平均值和标准偏差诊断所述链是否有缺陷。

公开(公告)号：US09442020B2

公开(公告)日：2016-09-13

申请号：US13771950

申请日：2013-02-20

Applicant: ULIS

Inventor： Alain Durand ,  Michel Vilain ,  Christophe Minassian

IPC: H04N5/33 ,  G01J5/22 ,  G01J5/00 ,  G01J5/24

CPC classification number: G01J5/24 ,  G01J5/22 ,  G01J2005/0048 ,  H04N5/33

Abstract: A method for detecting infrared radiation includes the steps of: providing a resistive bolometer retina including a plurality of resistive bolometers suspended above a substrate of a bolometric detector; acquiring the infrared radiation by the resistive bolometer retina to produce a plurality of raw read signals provided by the bolometers; correcting a response dispersion of the resistive bolometers in the raw read signals using a gain table, each gain of the gain table being associated with a bolometer of the resistive bolometer retina.

Abstract translation: 一种检测红外线辐射的方法包括以下步骤：提供一种电阻式辐射热量计视网膜，其包括悬置在测温检测器基板上方的多个电阻辐射计; 通过电阻式辐射热量计视网膜获取红外辐射以产生由辐射热计提供的多个原始读取信号; 使用增益表校正原始读取信号中的电阻辐射计的响应色散，增益表的每个增益与电阻辐射热计视网膜的测辐射热谱相关联。

公开(公告)号：US20150039271A1

公开(公告)日：2015-02-05

申请号：US14340117

申请日：2014-07-24

Applicant: ULIS

Inventor： Alain Durand ,  Aurélie Touvignon

IPC: G01J5/20

CPC classification number: G01J5/20 ,  G01J5/22 ,  G01J2005/0048

Abstract: Method of diagnosing the state of signal-forming chains of a detector including an array of detection bolometers, each chain comprising a bolometer, a circuit of stimulation, and a circuit forming a signal according to said stimulation, including forming an image of a substantially uniform scene on the array; applying at least first and second stimulations to the chains; reading the formed signals; and for each chain in a predetermined set, defining a neighborhood of chains; calculating coefficients of a polynomial interpolating the values of signals formed by said chain; calculating, for each chain of the neighborhood, coefficients of a polynomial interpolating the values of signals formed by said neighborhood chain; calculating an average and standard deviation of said coefficients of the neighborhood chains or of the set of neighborhood chains and said chain; and diagnosing if said chain is defective using the coefficients and the calculated average and standard deviation.

Abstract translation: 诊断检测器的信号形成链的状态的方法，包括检测辐射热计的阵列，每条链包括测辐射热计，刺激电路和根据所述刺激形成信号的电路，包括形成基本均匀的图像 阵列上的场景; 将至少第一和第二刺激应用于链; 阅读形成的信号; 并且对于预定集合中的每个链，定义链的邻域; 计算内插由所述链形成的信号的值的多项式的系数; 对所述邻域的每个链计算对由所述邻域链形成的信号的值进行内插的多项式的系数; 计算邻近链或邻近链和所述链集合的所述系数的平均和标准偏差; 并使用系数和计算的平均值和标准偏差诊断所述链是否有缺陷。

公开(公告)号：US20130218500A1

公开(公告)日：2013-08-22

申请号：US13771950

申请日：2013-02-20

Applicant: ULIS

Inventor： Alain Durand ,  Michel Vilain ,  Christophe Minassian

IPC: G01J5/24

CPC classification number: G01J5/24 ,  G01J5/22 ,  G01J2005/0048 ,  H04N5/33

Abstract: A method corrects a gain table by a correction of the response dispersion of resistive bolometers of a bolometric detector of a bolometer retina.The method includes: acquiring read signals from the retina corresponding to a substantially temperature-uniform scene; calculating a correction table g according to relation: g  ( i , j ) = R a   c   _   shut  ( i , j ) R  a   c   _   ref  ( i , j ) · TCR ref  ( i , j ) TCR shut  ( i , j ) and correcting the gain table according to relation: G shut  ( i , j ) = g  ( i , j ) · G ref  ( i , j ) N where: (i, j) represent the coordinates of the bolometers in the retina and the tables; Gref and Gshut respectively are the gain table before and after correction; Rac—shut(i, j) and Rac—ref(i, j) are the resistances of bolometer (i, j) at the time of acquisition of the signals and at a previous time; TCRshut(i, j) and TCRref(i, j) are the temperature variation coefficients of bolometer (i, j) at the time of acquisition of the signals and at a previous time; N is a scalar factor for normalizing gain table Gshut.

Abstract translation: 一种方法通过校正辐射热度计视网膜的测温检测器的电阻辐射热计的响应色散校正增益表。 该方法包括：从对应于基本上温度均匀的场景的视网膜获取读取信号; 根据关系式计算校正表g：g（i，j）= R（a，j）R（a，j） j）·TCR参考（i，j）TCR闭（i，j）并根据关系校正增益表：G shut（i，j）= g（i，j）·G ref ，j）N其中：（i，j）表示视网膜和表中的辐射热仪的坐标; Gref和Gshut分别是校正前后的增益表。 Rac-shut（i，j）和Rac-ref（i，j）是在获取信号时和前一时间的测辐射热计（i，j）的电阻; TCRshut（i，j）和TCRref（i，j）是在获取信号时和前一时间的测辐射热计（i，j）的温度变化系数; N是用于归一化增益表Gshut的标量因子。