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    • 1. 发明授权
    • Image converter
    • 图像转换器
    • US08363089B2
    • 2013-01-29
    • US12544240
    • 2009-08-20
    • Koji Inagaki
    • Koji Inagaki
    • H04N7/00H04N7/18
    • G06T3/0093G06T3/0062G06T5/006
    • Any given part is cut out from a distorted circular image photographed by use of a fisheye lens and converted into a planar regular image with less distortion. A virtual sphere H having a radius R on a distorted circular image S on an XY plane is defined, thereby allowing a user to designate a cut-out center point P, a magnification m, and a planar inclination angle φ. A visual line vector n passing through an intersecting point Q immediately above the point P is determined to define an UV orthogonal coordinate system having an orientation depending on the angle φ on a plane orthogonal to a visual line vector n at a point G in which a distance between two points OG is given as m·R. The UV orthogonal coordinate system is curved along the side face C of a “virtual cylindrical column in which the point G forms one point on the side face to have a straight line V′ parallel to the V axis and also passing through the point O as a central axis,” thereby defining the UV curved coordinate system. Correspondence relationship equations between a point Ci (ui, vi) on the UV curved coordinate system and a point Si (xi, yi) on the XY coordinate system are used to obtain an image in the vicinity of a point P on the UV curved coordinate system, and the image is expanded on a plane T to obtain a planar regular image.
    • 从通过使用鱼眼镜头拍摄的变形的圆形图像中切出任何给定的部分,并将其转换成具有较小失真的平面规则图像。 定义在XY平面上的畸变圆形图像S上具有半径R的虚拟球体H,从而允许用户指定切出的中心点P,倍率m和平面倾斜角度&phgr。 通过直接在点P上方的相交点Q的视线矢量n被确定为定义具有取决于角度&角度的取向的UV正交坐标系; 在与两点OG之间的距离为m·R的点G处与视线矢量n正交的平面上。 UV正交坐标系沿着虚拟圆柱体的侧面C弯曲,其中点G形成在侧面上的一个点,以具有平行于V轴的直线V',并且也通过点O作为 中心轴,从而限定了UV曲线坐标系。 使用UV曲线坐标系上的点Ci(ui,vi)和XY坐标系上的点Si(xi,yi)之间的对应关系方程来获得UV曲线坐标上的点P附近的图像 系统,并且在平面T上扩展图像以获得平面的常规图像。
    • 4. 发明申请
    • IMAGE CONVERTER
    • 图像转换器
    • US20100053325A1
    • 2010-03-04
    • US12544240
    • 2009-08-20
    • Koji Inagaki
    • Koji Inagaki
    • H04N7/18G06K9/36
    • G06T3/0093G06T3/0062G06T5/006
    • Any given part is cut out from a distorted circular image photographed by use of a fisheye lens and converted into a planar regular image with less distortion. A virtual sphere H having a radius R on a distorted circular image S on an XY plane is defined, thereby allowing a user to designate a cut-out center point P, a magnification m, and a planar inclination angle φ. A visual line vector n passing through an intersecting point Q immediately above the point P is determined to define an UV orthogonal coordinate system having an orientation depending on the angle φ on a plane orthogonal to a visual line vector n at a point G in which a distance between two points OG is given as m·R. The UV orthogonal coordinate system is curved along the side face C of a “virtual cylindrical column in which the point G forms one point on the side face to have a straight line V′ parallel to the V axis and also passing through the point O as a central axis,” thereby defining the UV curved coordinate system. Correspondence relationship equations between a point Ci (ui, vi) on the UV curved coordinate system and a point Si (xi, yi) on the XY coordinate system are used to obtain an image in the vicinity of a point P on the UV curved coordinate system, and the image is expanded on a plane T to obtain a planar regular image.
    • 从通过使用鱼眼镜头拍摄的变形的圆形图像中切出任何给定的部分,并将其转换成具有较小失真的平面规则图像。 定义在XY平面上的畸变圆形图像S上具有半径R的虚拟球体H,从而允许用户指定切出的中心点P,倍率m和平面倾斜角度&phgr。 通过直接在点P上方的相交点Q的视线矢量n被确定为定义具有取决于角度&角度的取向的UV正交坐标系; 在与两点OG之间的距离为m·R的点G处与视线矢量n正交的平面上。 UV正交坐标系沿着“虚拟圆柱体”的侧面C弯曲,其中点G形成在侧面上的一个点以具有平行于V轴的直线V',并且也通过点O作为 中心轴“,从而限定了UV曲线坐标系。 使用UV曲线坐标系上的点Ci(ui,vi)和XY坐标系上的点Si(xi,yi)之间的对应关系方程来获得UV曲线坐标上的点P附近的图像 系统,并且在平面T上扩展图像以获得平面的常规图像。