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1. 发明授权

US09754374B1 Detection of a sheet of light based on second derivative 有权
公开(公告)号：US09754374B1
公开(公告)日：2017-09-05
申请号：US15042860
申请日：2016-02-12
申请人： MATROX ELECTRONIC SYSTEMS LTD.
发明人： Arnaud Lina
IPC分类号： G06K9/46 , G06T7/00
CPC分类号： G06T7/0044 , G06K9/2036 , G06K9/4661 , G06K2209/401 , G06T7/0057 , G06T2207/20024
摘要： 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.

2. 发明授权

US09830532B1 Object detection in images using distance maps 有权
公开(公告)号：US09830532B1
公开(公告)日：2017-11-28
申请号：US14466564
申请日：2014-08-22
申请人： MATROX ELECTRONIC SYSTEMS LTD.
发明人： Arnaud Lina
IPC分类号： G06K9/62 , G06K9/34 , G06K9/42 , G06T7/00
CPC分类号： G06K9/6215 , G06K9/34 , G06K9/42 , G06K9/527 , G06T7/0065 , G06T7/0095 , G06T2207/20048 , G06T2207/20112
摘要： 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.

3. 发明授权

US09792675B1 Object recognition using morphologically-processed images 有权
公开(公告)号：US09792675B1
公开(公告)日：2017-10-17
申请号：US14797504
申请日：2015-07-13
申请人： Matrox Electronic Systems, Ltd.
发明人： Arnaud Lina , Jean-Sébastien Lemieux , Jérôme Dubois
IPC分类号： G06K9/46 , G06T5/30 , G06T7/00
CPC分类号： G06T5/30 , G06T7/0065 , G06T2207/20012 , G06T2207/20036
摘要： 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.

4. 发明授权

US09417058B1 Detecting a position of a sheet of light in an image 有权
标题翻译：检测图像中的一张光的位置
公开(公告)号：US09417058B1
公开(公告)日：2016-08-16
申请号：US14522766
申请日：2014-10-24
申请人： MATROX ELECTRONIC SYSTEMS LTD.
发明人： Arnaud Lina
IPC分类号： G06K9/00 , G01B11/14 , G01J1/42
CPC分类号： G01J1/42 , G06T7/13 , G06T7/521 , G06T7/73
摘要： 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.
摘要翻译：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。

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