-
公开(公告)号：US09754374B1
公开(公告)日：2017-09-05
申请号：US15042860
申请日：2016-02-12
Applicant: MATROX ELECTRONIC SYSTEMS LTD.
Inventor： Arnaud Lina
CPC classification number: G06T7/0044 , G06K9/2036 , G06K9/4661 , G06K2209/401 , G06T7/0057 , G06T2207/20024
Abstract: A method for detecting a position of a sheet of light is described. A second derivative filter is applied to an intensity profile of a line of pixels. An ingress pixel position associated with an ingress zero-crossing second derivative value is determined. The ingress pixel position is between a first pixel position with a first minimum intensity value of the intensity profile and a second pixel position with a first maximum intensity value of the intensity profile. An egress pixel position associated with an egress zero-crossing second derivative value is determined. The egress pixel position is between a third pixel position with a second maximum intensity value of the intensity profile and a fourth pixel position with a second minimum intensity value of the intensity profile. A midpoint pixel position between the ingress pixel position and the egress pixel position is output as the position of the sheet of light.
-
公开(公告)号：US09830532B1
公开(公告)日：2017-11-28
申请号：US14466564
申请日：2014-08-22
Applicant: MATROX ELECTRONIC SYSTEMS LTD.
Inventor： Arnaud Lina
CPC classification number: G06K9/6215 , G06K9/34 , G06K9/42 , G06K9/527 , G06T7/0065 , G06T7/0095 , G06T2207/20048 , G06T2207/20112
Abstract: There is described herein a method and system for detecting, in a segmented image, the presence and position of objects with a dimension greater than or equal to a minimum dimension. The objects exhibit a property whereby a distance map of the object at a first scale and a distance map of the object at a second scale greater than the first scale differ by a constant value over a domain of the distance map of the object at the first scale. A distance map of a model object is compared to a distance map of a target object using a similarity score that is invariant to an offset.
-
公开(公告)号：US09792675B1
公开(公告)日：2017-10-17
申请号：US14797504
申请日：2015-07-13
Applicant: Matrox Electronic Systems, Ltd.
Inventor： Arnaud Lina , Jean-Sébastien Lemieux , Jérôme Dubois
CPC classification number: G06T5/30 , G06T7/0065 , G06T2207/20012 , G06T2207/20036
Abstract: A method for recognizing an occurrence of an object in an image is provided where the appearance of the object may vary from one occurrence to another. The method includes defining a model set for object recognition, the model set including at least one model, acquiring a target image, processing the target image according to a set of morphological operations to obtain a set of morphologically-processed target images, performing object recognition on the set of morphologically-processed target images for the defined model set, and selecting at least one candidate occurrence of a model of the defined model set in the target image based on the object recognition performed on the set of morphologically-processed target images.
-
公开(公告)号：US09417058B1
公开(公告)日：2016-08-16
申请号：US14522766
申请日：2014-10-24
Applicant: MATROX ELECTRONIC SYSTEMS LTD.
Inventor： Arnaud Lina
Abstract: In a method and system for detecting a position of a sheet of light in an image, two parameters are used, namely the width of the widest peak to be detected and the intensity difference of the least-contrasted peak to be detected. From these two parameters, a size S, a distance D, and a threshold T are determined. A region of interest (ROI) is determined based on the intensity profile associated with a line of pixels of the image, distance D and threshold T. A derivative filter of size S is applied to the intensity profile to produce a slope of the intensity profile. In the determined ROI, one or more zero-crossings in the slope of the intensity profile are detected. From the detected zero-crossings, a zero-crossing is selected and the position of the selected zero-crossing is returned as the detected position of the sheet of light for the line of pixels.
Abstract translation: 在用于检测图像中的一张光的位置的方法和系统中，使用两个参数，即要检测的最宽峰的宽度和要检测的最小对比峰的强度差。 根据这两个参数，确定尺寸S，距离D和阈值T. 基于与图像的像素线，距离D和阈值T相关联的强度分布来确定感兴趣区域（ROI）。将尺寸S的导数滤波器应用于强度分布以产生强度分布的斜率 。 在确定的ROI中，检测强度分布的斜率中的一个或多个过零点。 从检测到的过零点中，选择过零点，并且返回所选过零点的位置作为针对像素行的光束的检测位置。
