Method and apparatus for generating images simulating non-homogeneous
fog effects
    1.
    发明授权
    Method and apparatus for generating images simulating non-homogeneous fog effects 失效
    用于产生模拟非均匀雾效应的图像的方法和装置

    公开(公告)号:US5535374A

    公开(公告)日:1996-07-09

    申请号:US423210

    申请日:1995-04-17

    申请人: Graham J. Olive

    发明人: Graham J. Olive

    CPC分类号: G06T15/10 G06T15/50 G09B9/301

    摘要: A method and apparatus for simulating the effect of non-homogeneous fog in an image displayed on a screen. The image is intended to represent the appearance of a model defined in a database in world space coordinates from an eyepoint position in world space, the model being defined in terms of individual features each having predetermined attributes defining the position and visible characteristics of the feature. Image data is derived from the model for each of an array of sampling points distributed across screen space. A non-homogeneous fog structure is defined in world space coordinates as a series of parallel strata of predetermined extinction coefficients. The positions of the eyepoint and a feature to be displayed relative to the fog structure are determined. The distance from the feature to the eyepoint is calculated. An average value of the extinction coefficients between the eyepoint and the feature is calculated from the defined parallel strata, and the attributes are modulated as a function of the calculated distance and the calculated average value of the extinction coefficients.

    摘要翻译: 一种用于模拟在屏幕上显示的图像中非均匀雾效果的方法和装置。 该图像旨在表示在世界空间中的眼点位置的世界空间坐标中的数据库中定义的模型的外观,该模型根据具有定义特征的位置和可见特征的预定属性的各个特征来定义。 图像数据是从分布在屏幕空间上的采样点阵列中的每一个的模型导出的。 非均匀雾结构在世界空间坐标中定义为一系列预定消光系数的平行层。 确定眼点的位置和相对于雾结构显示的特征。 计算从特征到眼点的距离。 从定义的并行层计算目标点和特征点之间的消光系数的平均值,并根据计算出的距离和计算出的消光系数的平均值对属性进行调制。

    Simulator assembly
    2.
    发明授权
    Simulator assembly 失效
    模拟器装配

    公开(公告)号:US5226816A

    公开(公告)日:1993-07-13

    申请号:US974329

    申请日:1992-11-10

    IPC分类号: G09B9/16 G09B9/32

    CPC分类号: G09B9/32 G09B9/165

    摘要: A method for assembling a simulator in which a visual display system is arranged to display an image for viewing from a predetermined viewing position within a simulated viewing station. The visual display system and viewing station are mounted on a base. The viewing station is fabricated such that the location of the viewing position relative to the viewing station is established. The visual display system is fabricated so that when mounted in a predetermined position on the base the location of the viewing position relative to the base is established. When the viewing station and visual display system are mounted on the base, the visual display system is mounted in the predetermined position, and the viewing station being mounted at a position relative to the base selected such that the eye position of a person sat within the viewing station coincides with the location of the viewing position relative to the base.

    摘要翻译: 一种用于组装模拟器的方法,其中视觉显示系统被布置为在模拟观察站内从预定的观察位置显示用于观看的图像。 视觉显示系统和观察台安装在基座上。 制造观察站使得观察位置相对于观察站的位置被建立。 视觉显示系统被制造成使得当安装在基座上的预定位置时,建立了相对于基座的观察位置的位置。 当观察台和视觉显示系统安装在基座上时,视觉显示系统安装在预定位置,观察台安装在相对于所选择的基座的位置,使得人的眼睛位置坐在 观察站与观察位置相对于基部的位置一致。

    Method and apparatus for generating images simulating non-homogeneous
fog effects
    3.
    发明授权
    Method and apparatus for generating images simulating non-homogeneous fog effects 失效
    用于产生模拟非均匀雾效应的图像的方法和装置

    公开(公告)号:US5412796A

    公开(公告)日:1995-05-02

    申请号:US915999

    申请日:1992-08-03

    申请人: Graham J. Olive

    发明人: Graham J. Olive

    CPC分类号: G06T15/10 G06T15/50 G09B9/301

    摘要: A method and apparatus for simulating the effect of non-homogeneous fog in an image displayed on a screen. The image is intended to represent the appearance of a model defined in a database in world space coordinates from an eyepoint position in world space, the model being defined in terms of individual features each having predetermined attributes defining the position and visible characteristics of the feature. Image data is derived from the model for each of an array of sampling points distributed across screen space. A non-homogeneous fog structure is defined in world space coordinates as a series of parallel strata of predetermined extinction coefficients. The positions of the eyepoint and a feature to be displayed relative to the fog structure are determined. The distance from the feature to the eyepoint is calculated. An average value of the extinction coefficients between the eyepoint and the feature is calculated from the defined parallel strata, and the attributes are modulated as a function of the calculated distance and the calculated average value of the extinction coefficients.

    摘要翻译: PCT No.PCT / GB91 / 00627 Sec。 371日期:1992年8月3日 102(e)日期1992年8月3日PCT 1991年4月22日PCT PCT。 第WO91 / 18359号公报 日期:1991年11月28日。一种用于模拟在屏幕上显示的图像中非均匀雾的影响的方法和装置。 图像旨在表示在世界空间中的眼点位置的世界空间坐标中的数据库中定义的模型的外观,该模型根据各自具有限定特征的位置和可见特征的预定属性来定义。 图像数据是从分布在屏幕空间上的采样点阵列中的每一个的模型导出的。 非均匀雾结构在世界空间坐标中定义为一系列预定消光系数的平行层。 确定眼点的位置和相对于雾结构显示的特征。 计算从特征到眼点的距离。 从定义的并行层计算目标点和特征点之间的消光系数的平均值,并根据计算出的距离和计算出的消光系数的平均值对属性进行调制。

    Simulator
    6.
    发明授权
    Simulator 失效
    模拟器

    公开(公告)号:US4667199A

    公开(公告)日:1987-05-19

    申请号:US693244

    申请日:1985-01-22

    CPC分类号: G09B9/54

    摘要: A simulator for simulating radar or sonar signals returned to an observation point from a three-dimensional object of non-uniform reflectivity. An imaginary three-dimensional object is defined spatially in the form of a series of three-dimensional regularly shaped elements. Each element has allocated to it a predetermined level of uniform reflectivity.The position of boundaries of the element along an imaginary radial line extending from the observation point are calculated and the reflectivity allocated to points on the line on each side of each of the boundary positions is calculated. A sequence of signals is then generated which is representative of the allocated reflectivities occurring along the length of the line.

    摘要翻译: 用于模拟雷达或声纳信号的模拟器从不均匀反射率的三维物体返回到观察点。 虚拟的三维物体以一系列三维规则形状的元素的形式在空间上定义。 每个元件已经分配了预定水平的均匀反射率。计算沿着从观察点延伸的假想径向线的元素的边界位置,并且分配给每个边界位置的每一侧的线上的点的反射率 被计算。 然后产生一系列信号,其代表沿线长度发生的所分配的反射率。

    Image generator for simulating the illumination effects of a
vehicle-mounted light source on an image displayed on a screen
    7.
    发明授权
    Image generator for simulating the illumination effects of a vehicle-mounted light source on an image displayed on a screen 失效
    用于模拟车载光源对屏幕上显示的图像的照明效果的图像发生器

    公开(公告)号:US5384719A

    公开(公告)日:1995-01-24

    申请号:US960402

    申请日:1993-01-15

    CPC分类号: G06T15/506 G09B9/301

    摘要: A method and apparatus for simulating the illumination effects of a vehicle-mounted light source in an image displayed on a screen. The image is intended to represent the appearance of a model defined in a database in world space coordinates from and eyepoint position in world space, the model being defined in terms of a plurality of features each having predetermined attributes. The vehicle-mounted light source is defined in terms of an origin and a direction in eyepoint space. For each feature potentially contributing to the image, the angular position of a point on that feature relative to the light source is calculated as the angle between the light source direction and a line drawn to that point from the light source. An illumination intensity for that point is determined by reference to the calculated angle, and the illumination intensity is reduced as a function of the distance from the eyepoint to the said point to provide a resultant intensity. The attributes of the feature at the said point are modulated as a function of the resultant intensity.

    摘要翻译: PCT No.PCT / GB91 / 00884 Sec。 371日期:1993年1月15日 102(e)日期1993年1月15日PCT Filed Jun。3,1991 PCT Pub。 公开号WO91 / 19280 日期1991年12月12日。一种用于模拟车载光源在屏幕上显示的图像中的照明效果的方法和装置。 该图像旨在表示在世界空间中的世界空间坐标和眼点位置的数据库中定义的模型的外观,该模型根据具有预定属性的多个特征来定义。 车载光源根据眼点空间中的原点和方向来定义。 对于潜在地对图像有贡献的每个特征,该特征相对于光源的点的角位置被计算为光源方向与从光源绘制到该点的线之间的角度。 通过参照计算出的角度确定该点的照明强度,并且照射强度作为从眼点到所述点的距离的函数减小以提供合成的强度。 所述点处的特征的属性作为合成强度的函数被调制。

    Method and apparatus for generating an elliptical image
    8.
    发明授权
    Method and apparatus for generating an elliptical image 失效
    用于产生椭圆图像的方法和装置

    公开(公告)号:US5338200A

    公开(公告)日:1994-08-16

    申请号:US934483

    申请日:1992-09-15

    申请人: Graham J. Olive

    发明人: Graham J. Olive

    CPC分类号: G09B9/301 G06T15/005

    摘要: Elliptical features are described in an image generator database in terms of an origin and major and minor axes defined by reference to a world or model space coordinate system. Image data is assembled for display by transforming the database contents into screen space and assessing for each of an array of sampling points distributed across screen space which features are to contribute to the portion of a final image in which the sampling point is located. In the case of elliptical features, data is transformed into eyepoint space and each sampling point is projected into eyepoint space to determine the point of intersection between a line drawn through the sampling point from the eyepoint and a plane defined by the axes. The coordinates of the intersection point in a coordinate system defined by the origin and axes, are used to determine whether or not the feature contributes to the sampling point.

    摘要翻译: PCT No.PCT / GB91 / 00589 Sec。 371日期:1992年9月15日 102(e)日期1992年9月15日PCT 1991年4月15日提交PCT公布。 WO91 / 16700 PCT出版物 日期1991年10月31日。根据通过引用世界或模型空间坐标系定义的原点和主轴和短轴,图像生成器数据库中描述了椭圆特征。 通过将数据库内容转换为屏幕空间并且对屏幕空间中分布的采样点阵列中的每一个进行评估,从而对图像数据进行组合以显示哪些特征对于采样点所在的最终图像的部分有贡献。 在椭圆特征的情况下,将数据转换为眼点空间,并将每个采样点投影到眼点空间中,以确定从眼点通过采样点绘制的线与由轴定义的平面之间的交点。 由原点和轴定义的坐标系中的交点的坐标用于确定特征是否有助于采样点。