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公开(公告)号：US20050036689A1
公开(公告)日：2005-02-17
申请号：US10896753
申请日：2004-07-22
Applicant: Yaghoub Mahdavieh
Inventor： Yaghoub Mahdavieh
CPC classification number: G01V5/0008
Abstract: A method of detecting a presence or absence of subject matter of interest, for example, sheet explosives and/or other potential threat objects is provided by various local and/or global gradient analysis methods including determining characteristics of gradient information of regions in an X-ray image to determine if the regions are associated with subject matter of interest for which detection may be desired, for example, contraband, explosives and/or other prohibited or unauthorized material.
Abstract translation: 通过各种局部和/或全局梯度分析方法提供检测感兴趣的主题的存在或不存在的方法，例如片状炸药和/或其他潜在的威胁对象，包括确定X射线的区域的梯度信息的特性， 以确定区域是否与可能需要检测的感兴趣的主题相关联，例如违禁品，爆炸物和/或其他被禁止或未经授权的材料。
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公开(公告)号：US07613316B2
公开(公告)日：2009-11-03
申请号：US10896753
申请日：2004-07-22
Applicant: Yaghoub Mahdavieh
Inventor： Yaghoub Mahdavieh
CPC classification number: G01V5/0008
Abstract: A method of detecting a presence or absence of subject matter of interest, for example, sheet explosives and/or other potential threat objects is provided by various local and/or global gradient analysis methods including determining characteristics of gradient information of regions in an X-ray image to determine if the regions are associated with subject matter of interest for which detection may be desired, for example, contraband, explosives and/or other prohibited or unauthorized material.
Abstract translation: 通过各种局部和/或全局梯度分析方法提供检测感兴趣的主题的存在或不存在的方法，例如片状炸药和/或其他潜在的威胁对象，包括确定X射线的区域的梯度信息的特性， 以确定区域是否与可能需要检测的感兴趣的主题相关联，例如违禁品，爆炸物和/或其他被禁止或未经授权的材料。
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公开(公告)号：US5345514A
公开(公告)日：1994-09-06
申请号：US772761
申请日：1991-09-16
Applicant: Yaghoub Mahdavieh , Kristina H. V. Hedengren
Inventor： Yaghoub Mahdavieh , Kristina H. V. Hedengren
CPC classification number: B82Y15/00 , G01N27/9046
Abstract: A method for inspecting a component of a gas turbine engine or the like having a plurality of similarly shaped structural portions, such as the gear teeth of a gear, the dovetail slots of a turbine disk or the like, includes the steps of: scanning a surface of at least one of the similarly shaped structural portions with an eddy current probe to induce eddy currents in the component; generating a two-dimensional image of the at least one portion from eddy current signals received during scanning, the image including a multiplicity of pixels arranged in a two-dimensional array and each pixel having a gray scale intensity responsive to the eddy current induced in the component at a component location corresponding to a position of the pixel in the matrix array; preprocessing the image to substantially reduce any signals or changes in the gray scale intensity of any pixels relative to the background pixel intensities of the image caused by geometrical characteristics and background noise common to all similarly shaped structuaral portions; identifying any suspected defect regions from the preprocessed image; determining a defect signal for each suspected defect region; and rejecting the component if any defect signal exceeds a predetermined reference value.
Abstract translation: 用于检查具有多个类似形状的结构部分的燃气涡轮发动机等的部件的方法，例如齿轮的齿轮齿轮，涡轮盘等的燕尾槽，包括以下步骤：扫描 至少一个类似形状的结构部分的表面具有涡流探针以在部件中引起涡流; 从扫描期间接收到的涡流信号产生至少一部分的二维图像，该图像包括以二维阵列排列的多个像素，每个像素具有响应于在 在与矩阵阵列中的像素的位置相对应的分量位置处的分量; 对图像进行预处理以相对于由所有类似形状的结构部分共同的几何特征和背景噪声引起的图像的背景像素强度来基本上减少任何像素的灰度强度的任何信号或变化; 从预处理图像中识别任何可疑的缺陷区域; 确定每个可疑缺陷区域的缺陷信号; 并且如果任何缺陷信号超过预定参考值，则拒绝该组件。
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