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    • 1. 发明授权
    • System and method for performing segmentation-based enhancements of a video image
    • 用于执行视频图像的基于分段的增强的系统和方法
    • US06903782B2
    • 2005-06-07
    • US09819360
    • 2001-03-28
    • Stephen HermanJohan G. Janssen
    • Stephen HermanJohan G. Janssen
    • H04N5/14H04N9/64H04N19/85
    • H04N19/85G06T5/001G06T7/11G06T7/143
    • There is disclosed an apparatus for performing segmentation-based enhancements of a video image. The apparatus comprises: 1) an input buffer for storing video frames of an incoming video signal; 2) a segmentation controller capable of segmenting a first stored frame into a plurality of segments, each of the plurality of segments comprising a plurality of pixels having at least one common property; 3) an image processor capable of calculating a probability function associated with at least one pixel in the first stored frame, the probability function indicating a probability that the at least one pixel belongs within a first selected one of the plurality of segments; and 4) an enhancement controller capable of enhancing a parameter of the at least one pixel as a function of the probability function of the at least one pixel.
    • 公开了一种用于执行视频图像的基于分段的增强的装置。 该装置包括:1)用于存储输入视频信号的视频帧的输入缓冲器; 2)分段控制器,其能够将第一存储的帧分割成多个段,所述多个段中的每一个段包括具有至少一个共同属性的多个像素; 3)能够计算与第一存储帧中的至少一个像素相关联的概率函数的图像处理器,所述概率函数指示所述至少一个像素属于所述多个片段中的第一选定的一个片段中的概率; 以及4)增强控制器,其能够根据所述至少一个像素的概率函数增强所述至少一个像素的参数。
    • 5. 发明授权
    • LED array having an active shunt arrangement
    • LED阵列具有主动分流装置
    • US6153980A
    • 2000-11-28
    • US434157
    • 1999-11-04
    • Thomas M. MarshallMichael D. PashleyStephen HermanGert W. Bruning
    • Thomas M. MarshallMichael D. PashleyStephen HermanGert W. Bruning
    • H05B33/08H05B37/03H05B37/00
    • H05B33/083H05B33/089H05B37/038Y10S362/80
    • A device, e.g., a luminaire, that includes a plurality of LEDs connected in series, and an active shunt arrangement for sensing a failure of one or more of the LEDs and for shunting current that would have otherwise flowed through a failed LED, to thereby maintain a flow of current through remaining ones of the plurality of LEDs. In one exemplary embodiment, the active shunt arrangement includes a plurality of active shunts connected in parallel across respective ones of the LEDs, and remote sense and digital control logic for detecting an open-circuit condition of the normally closed circuit, and for sequentially activating the active shunts until the normally closed circuit has been restored to a closed-circuit condition. In another exemplary embodiment, the active shunt arrangement includes a plurality of active shunts connected in parallel across respective ones of the LEDs, a plurality of sense circuits operatively associated with respective ones of the LEDs, each of the sense circuits being configured to sense a failure condition of its associated LED, and to produce a sense output signal upon sensing a failure condition of its associated LED, and a plurality of control circuits operatively associated with respective ones of the LEDs and respective ones of the sense circuits, each of the control circuits being responsive to the sense output signal produced by its associated sense circuit to activate the active shunt connected across its associated LED. Preferably, each of the active shunts is an active switching device, such as a power MOSFET, a bipolar transistor, or a micro-relay, that has a low on-resistance.
    • 包括串联连接的多个LED的装置,例如照明器,以及主动分流装置,用于感测一个或多个LED的故障以及将流过故障LED的分流电流,从而 保持电流流过多个LED中的剩余LED。 在一个示例性实施例中,主动分流装置包括并联连接在相应的LED上的多个主动分流器,以及用于检测常闭电路的开路状态的远程感测和数字控制逻辑,并且用于顺序地激活 主动分流,直到常闭电路恢复到闭路状态。 在另一个示例性实施例中,主动分流装置包括多个并联连接在相应的LED上的主动分流器,多个感测电路可操作地与相应的LED连接,每个感测电路被配置为感测故障 其相关联的LED的状态,并且在感测到其相关联的LED的故障状态时产生感测输出信号,以及多个控制电路,其操作上与LED中的相应LED以及相应的感测电路相关联,每个控制电路 响应于由其相关联的感测电路产生的感测输出信号,以激活连接在其相关联的LED上的主动分流器。 优选地,每个有源分流器是具有低导通电阻的有源开关器件,例如功率MOSFET,双极晶体管或微型继电器。
    • 7. 发明授权
    • Apparatus and method for correcting signal and color degradation in a video using known icons from video images
    • 用于使用视频图像中的已知图标校正视频中的信号和颜色劣化的装置和方法
    • US06674898B2
    • 2004-01-06
    • US09732586
    • 2000-12-08
    • Stephen Herman
    • Stephen Herman
    • G06K900
    • G09G5/02G09G2320/0666H04N9/73
    • There is disclosed an apparatus for correcting the color of objects appearing in a video image. The apparatus comprises: 1) a frame buffer for receiving and storing a first video frame from an incoming baseband video signal; 2) a memory for storing known pixel data corresponding to a plurality of known icons, the known pixel data comprising true color data values associated with the plurality of known icons; and 3) a color correction controller for comparing captured pixel data from the stored first video frame with the known pixel data stored in the memory and detecting a first actual image of a first known icon appearing in the stored first video frame. The color correction controller also compares a first true color data value associated with the first known icon and a first actual color data value associated with a first actual color in the first actual image of the first known icon. In response to the comparison, the color correction controller determine a first color correction factor associated with the first actual color data value.
    • 公开了一种用于校正出现在视频图像中的对象的颜色的装置。 该装置包括:1)帧缓冲器,用于从输入的基带视频信号接收和存储第一视频帧; 2)用于存储对应于多个已知图标的已知像素数据的存储器,所述已知像素数据包括与所述多个已知图标相关联的真实颜色数据值; 以及3)颜色校正控制器,用于将来自存储的第一视频帧的捕获像素数据与存储在存储器中的已知像素数据进行比较,并检测出现在所存储的第一视频帧中的第一已知图标的第一实际图像。 颜色校正控制器还将与第一已知图标相关联的第一真实颜色数据值和与第一已知图标的第一实际图像中的第一实际颜色相关联的第一实际颜色数据值进行比较。 响应于比较,颜色校正控制器确定与第一实际颜色数据值相关联的第一颜色校正因子。
    • 8. 发明授权
    • Apparatus for mixing light from different color LEDs
    • 用于混合来自不同颜色LED的光的装置
    • US06264346B1
    • 2001-07-24
    • US09406287
    • 1999-09-24
    • Michael D. PashleyThomas MarshallStephen Herman
    • Michael D. PashleyThomas MarshallStephen Herman
    • F21V500
    • G02B27/126F21V5/00F21V7/00F21V7/09F21V13/04F21Y2115/10G02B27/143
    • A faceted surface has first and second facets which deflect respective first and second light beams to produce first sub-beams which alternate with second sub-beams. The faceted surface may be a reflector having first facets at 120° to second facets for mixing light beams which are incident at 120° to each other. 100% of reflected sub-beams from each source alternate with 100% of sub-beams from the other source. The faceted surface may also be a refractor which is part of a transparent block having two parallel faceted surfaces. A first refractive surface refracts parallel light beams to produce diverging beams which are each split into spaced apart sub-beams by the second refractive surface. 50% of refracted sub-beams originating from each source alternate with 50% of refracted sub-beams of each adjacent source.
    • 分面具有第一和第二小平面,其使相应的第一和第二光束偏转以产生与第二子光束交替的第一子光束。 分面表面可以是具有在120°至第二面的第一面的反射器,用于混合彼此以120°入射的光束。 来自每个源的反射子光束的100%与来自另一个源的100%的子光束交替。 分面表面也可以是折射器,其是具有两个平行的刻面的透明块的一部分。 第一折射表面折射平行光束以产生发散光束,每个光束通过第二折射表面分裂成间隔开的子光束。 源于每个源的折射子束的50%与每个相邻源的50%的折射子光束交替。
    • 9. 发明授权
    • Method and apparatus for performing dynamic gamma contrast control
    • 用于执行动态伽马对比度控制的方法和装置
    • US5394195A
    • 1995-02-28
    • US76565
    • 1993-06-14
    • Stephen Herman
    • Stephen Herman
    • H04N5/202H04N9/69
    • H04N5/202H04N9/69
    • Ordinarily, television signals are subjected to gamma correction at the source to compensate for non-linearities in CRT-based displays in accordance with set standards. However, it has been found in practice that all CRT-based displays do not exhibit the same amount of non-linearity. Hence, some television receivers include gamma correction circuitry which compensate for the difference between the particular CRT display and that assumed by the transmission system standard. In addition the above, circuitry is added for adapting this correction to local areas on the display thereby achieving dynamic range equalization. The input video signal is first low-pass filtered and then subjected to a normalization between 0.0 and a first predefined maximum value A. A second predefined value B is then added to this normalized signal generating a gamma exponential. At the same time, the input video signal is normalized for the range 0.0 and 1.0. This normalized input signal is then raised to an exponential power equivalent to the gamma exponential. Finally, this resultant signal is re-scaled back to the dynamic range of the input video signal. The resultant video signal on display then has the dark portions thereof more visible without the bright parts looking washed out.
    • 通常,电视信号在源处进行伽马校正,以根据设定的标准补偿基于CRT的显示器中的非线性。 然而,在实践中已经发现,所有基于CRT的显示器都不具有相同量的非线性。 因此,一些电视接收机包括伽马校正电路,其补偿特定CRT显示器与传输系统标准所假定的差异。 此外,添加电路以使该校正适应于显示器上的局部区域,从而实现动态范围均衡。 输入视频信号首先被低通滤波,然后在0.0和第一预定义的最大值A之间进行归一化。然后将第二预定义值B加到产生伽马指数的该归一化信号上。 同时,输入视频信号的范围为0.0和1.0。 然后将该归一化的输入信号提高到等于伽马指数的指数函数。 最后,将该结果信号重新缩小到输入视频信号的动态范围。 所显示的结果视频信号之后,其较暗的部分可见,而没有明亮的部分被洗出来。