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    • 9. 发明授权
    • Apparatus and method for detecting an error in a power signal
    • 用于检测功率信号中的误差的装置和方法
    • US07813097B2
    • 2010-10-12
    • US11459439
    • 2006-07-24
    • Jing Hu
    • Jing Hu
    • H02H3/08
    • H02M1/32H02M3/33507
    • An error detection apparatus for detecting an error in a power signal output by an external device switchable by a switching signal has a comparing unit for comparing the power signal with a reference signal to yield a comparison signal, a switching unit for providing the switching signal dependent on a control signal with the switching unit being designed to disregard the control signal and to ensure that the external device is switched off upon provision of a triggering signal to the switching unit, and a triggering unit for providing the triggering signal depending on the control signal and the comparison signal. Alternatively, the error detection apparatus has an influencing unit for influencing the power signal, such that the power signal fulfils a predetermined relationship to a reference signal in the case of an occurrence of the error, whereas the relationship is not fulfilled in the absence of the error.
    • 用于检测由切换信号切换的外部设备输出的功率信号中的误差的误差检测装置具有用于将功率信号与参考信号进行比较以产生比较信号的比较单元,用于提供切换信号的切换单元 在控制信号上,开关单元被设计成忽略控制信号,并确保在向开关单元提供触发信号时关闭外部设备;以及触发单元,用于根据控制信号提供触发信号 和比较信号。 或者,误差检测装置具有影响功率信号的影响单元,使得在发生错误的情况下,功率信号与参考信号达到预定的关系,而在没有 错误。
    • 10. 发明申请
    • METHOD AND DEVICE FOR REMOVING IMAGE NOISE BASED ON THE MEDIAN FILTER
    • 基于中值滤波器去除图像噪声的方法和装置
    • US20100098348A1
    • 2010-04-22
    • US12615923
    • 2009-11-10
    • Benhao ZHANGXiaoguang FengJing HuFuhuei Lin
    • Benhao ZHANGXiaoguang FengJing HuFuhuei Lin
    • G06K9/40
    • H04N5/21G06T5/002G06T5/20G06T2207/10024G06T2207/20032G06T2207/20192
    • A method and an apparatus for image denoising based on medium filter is disclosed according to the present invention. Such method and apparatus may be used to remove linear noise and random noise for the sensor, as well as the bad points in the sensor image, and to prevent over-denoising. The technical solutions includes selecting three groups of pixels from neighboring pixels of a current pixel, calculating medians Φ1, Φ2 and Φ3 for the pixels in each group; calculating a reference luminance Y: Y=Φ2+[(Φ1+Φ3−2*Φ2]*h*[1−k*var], where var=Φ3−Φ1; determining whether the current pixel (cur_pixel) is a bad pixel; letting a temporary variable (tmp_data) be Φ1 if the current pixel is a bad pixel; letting a temporary variable (tmp_data) be the current pixel value (cur_pixel) if the current pixel is not a bad pixel; determining whether the current pixel is located on an edge. If the current pixel is determined to be located on the edge, the reference luminance Y is limited to a range of [tmp_data−edge_limit , tmp_data+edge_limit], the current pixel value is updated with the limited reference luminance Y and the denoising process ends. If the current pixel is determined not to be located on the edge, the value of |Y−tmp_data| and the value of avoid_over_noise are compared. If |Y−tmp_data|
    • 根据本发明公开了一种基于介质滤波器的图像去噪方法和装置。 这种方法和装置可以用于消除传感器的线性噪声和随机噪声,以及传感器图像中的坏点,并防止过度去噪。 技术方案包括从当前像素的相邻像素中选择三组像素,为每组中的像素计算中值Φ1,Φ2和Φ3; 计算参考亮度Y:Y =Φ2+ [(Φ1+Φ3-2*Φ2] * h * [1-k * var],其中var =Φ3-Φ1;确定当前像素(cur_pixel)是否为坏像素; 如果当前像素是不良像素,则使临时变量(tmp_data)为Φ1;如果当前像素不是坏像素,则使临时变量(tmp_data)为当前像素值(cur_pixel);确定当前像素是否位于 如果当前像素被确定为位于边缘,则参考亮度Y被限制在[tmp_data-edge_limit,tmp_data + edge_limit]的范围内,以有限的参考亮度Y更新当前像素值,并且 去噪处理结束,如果确定当前像素不位于边缘,则比较| Y-tmp_data |的值和avoid_over_noise的值,如果| Y-tmp_data |