公开(公告)号：US6034741A

公开(公告)日：2000-03-07

申请号：US558596

申请日：1995-10-30

申请人： Laura Pennino ,  Rinaldo Poluzzi ,  Massimo Mancuso ,  Gianguido Rizzotto ,  Federico Travaglia

发明人： Laura Pennino ,  Rinaldo Poluzzi ,  Massimo Mancuso ,  Gianguido Rizzotto ,  Federico Travaglia

IPC分类号： H04N5/213 ,  G06T5/20 ,  H04N5/21

CPC分类号： G06T5/20 ,  H03H2222/02

摘要： A filter performs a reduction of pulsed noise in video images in accordance with fuzzy logic. An interface circuit of the filter receives consecutive digital signals in time corresponding to the video images and generates an image window having a digital signal to be processed at the center. The filter also has a comparator block, a plurality of digital subtractors, and a memory circuit connected in cascade to the comparator block. The filter also has a filtering circuit that organizes values of digital signals of the video image, and an arithmetic block that performs a switch between the digital signal to be processed and the output of the filtering circuit on the basis of the values taken by the parameter.

摘要翻译： 滤波器根据模糊逻辑执行视频图像中的脉冲噪声的降低。 滤波器的接口电路在对应于视频图像的时间中接收连续的数字信号，并产生具有要在中心处理的数字信号的图像窗口。 滤波器还具有比较器块，多个数字减法器和与比较器块级联连接的存储器电路。 滤波器还具有组合视频图像的数字信号的值的滤波电路，以及基于由参数取得的值执行要处理的数字信号和滤波电路的输出之间的切换的运算块 。

公开(公告)号：US5748796A

公开(公告)日：1998-05-05

申请号：US519056

申请日：1995-08-24

申请人： Laura Pennino ,  Massimo Mancuso ,  Federico Travaglia ,  Rinaldo Poluzzi ,  Gianguido Rizzotto

发明人： Laura Pennino ,  Massimo Mancuso ,  Federico Travaglia ,  Rinaldo Poluzzi ,  Gianguido Rizzotto

IPC分类号： G06F9/44 ,  G06N7/02 ,  G06T5/00 ,  G06T5/20 ,  H04N1/40 ,  H04N1/38

CPC分类号： G06T5/20

摘要： A fuzzy device for image noise reduction, includes an interface adapted to retrieve the gray level of a pixel to be processed of an image and of neighbouring pixels; a difference circuit connected to the interface and adapted to generate a difference of the gray levels between said neighbouring pixels and said pixels to be processed; a fuzzy flat area smoothing circuit connected to the difference circuit and adapted to perform a low-pass smoothing of an almost homogeneous region defined by said pixel and by said neighbouring pixels; an edge preserving smoothing circuit connected to the difference circuit and adapted to perform low-pass filtering on a high-frequency information region defined by the pixel and by the neighbouring pixels; a region voter circuit connected to the interface and adapted to give a measure for considering whether the region defined by the pixel and the neighbouring pixels is almost homogeneous; and a soft switching circuit connected to the outputs of the smoothing circuit and adapted to perform the weighting of the outputs of the smoothing circuit on the basis of the measure.

摘要翻译： 一种用于图像噪声降低的模糊设备，包括适于检索要处理的图像和相邻像素的像素的灰度级的接口; 连接到所述接口并适于产生所述相邻像素与要处理的像素之间的灰度级差的差分电路; 连接到差分电路的模糊平坦区域平滑电路，并且适于执行由所述像素和所述相邻像素限定的几乎均匀的区域的低通平滑化; 连接到所述差分电路并适于对由所述像素和所述相邻像素定义的高频信息区域执行低通滤波的边缘保持平滑电路; 连接到界面的区域选举电路，并且适于给出用于考虑由像素和相邻像素定义的区域是否几乎是均匀的度量; 以及软切换电路，连接到平滑电路的输出，并且适于基于该测量执行平滑电路的输出的加权。