公开(公告)号：US06650792B1

公开(公告)日：2003-11-18

申请号：US09600108

申请日：2000-07-06

申请人： Toru Aida ,  Masamichi Nakajima ,  Masayuki Kobayashi ,  Junichi Onodera ,  Hideyuki Ohmori

发明人： Toru Aida ,  Masamichi Nakajima ,  Masayuki Kobayashi ,  Junichi Onodera ,  Hideyuki Ohmori

IPC分类号： G06K932

CPC分类号： H04N1/393

摘要： An image processor containing an EPROM (38) stored with coefficient data for image enlargement and reduction, coefficient read controllers (40-44) for reading out coefficient data from the EPROM (38) according to an enlargement/reduction selection signal, a variable horizontal characteristic filter (16) for executing either image enlargement or image reduction according to the coefficient data, a variable vertical characteristic filter (18) also for executing either image enlargement or image reduction according to the coefficient data, a frame memory (20), a contour correcting circuit (14), and selectors (22-30). When image enlargement is selected by selectors (22-30), input video signals are processed by the contour correcting circuit (14), the frame memory (20), and the filters (16,18) in this order while, when image reduction is selected, input video signals are processed by the same in the reverse order. The portion which should not undergo contour enhancement does not undergo contour enhancement during image enlargement, and high frequency components enhanced by contour correction during image reduction do not disappear and adequate contour correction, even when either processing image enlargement or reduction, is selected.

摘要翻译： 包含存储有用于图像放大和缩小的系数数据的EPROM（38）的图像处理器，用于根据放大/缩小选择信号从EPROM（38）读出系数数据的系数读取控制器（40-44） 用于根据系数数据执行图像放大或图像缩小的特征滤波器（16），还用于根据系数数据执行图像放大或图像缩小的可变垂直特征滤波器（18），帧存储器（20）， 轮廓校正电路（14）和选择器（22-30）。 当选择器（22-30）选择图像放大时，输入视频信号按照该顺序由轮廓校正电路（14），帧存储器（20）和滤波器（16,18）进行处理 被选择，输入视频信号以相反的顺序被处理。 不要进行轮廓增强的部分在图像放大期间不会进行轮廓增强，即使选择了任何一种处理图像放大或缩小，图像缩小期间通过轮廓校正增强的高频分量也不会消失，并且可以进行适当的轮廓校正。

公开(公告)号：US06970204B1

公开(公告)日：2005-11-29

申请号：US09831461

申请日：1999-11-02

申请人： Toru Aida ,  Hideyuki Ohmori

发明人： Toru Aida ,  Hideyuki Ohmori

IPC分类号： G06T3/40 ,  G09G3/20 ,  G09G5/00 ,  G09G5/36 ,  G09G5/391 ,  G09G5/395 ,  H04N1/393 ,  H04N5/262 ,  H04N11/00

CPC分类号： H04N5/2628 ,  G06T3/40 ,  G09G5/391 ,  G09G5/395 ,  G09G2340/0421

摘要： An image magnifying circuit is made up of a frame memory 12 for storing input image data, a coefficient memory 18 in which filter coefficients corresponding to a plurality of magnification ratios are stored, a non-linear magnification controller 20 for outputting an enable signal for reading the corresponding image data from the frame memory 12 and a coefficient selecting address AD3 for reading the corresponding filter coefficient from the coefficient memory 18, on the basis of an area width w predetermined to divide a display screen into n parts and a predetermined magnification for the n parts, and a filter 14 for filtering the image data from the frame memory 12 on the basis of the filter coefficients from the coefficient memory 18 to output the image data on the image which is non-linearly magnified in a horizontal direction. These filter coefficients correspond to the magnification ratio which are set for the n parts of the display screen.

摘要翻译： 图像放大电路由用于存储输入图像数据的帧存储器12，存储有与多个倍率相对应的滤波器系数的系数存储器18，用于输出用于读取的使能信号的非线性放大控制器20 来自帧存储器12的对应图像数据和用于从系数存储器18读取相应的滤波器系数的系数选择地址AD 3，其基于预定将显示屏划分为n个部分的区域宽度w和用于 n部分，以及滤波器14，用于根据来自系数存储器18的滤波器系数对来自帧存储器12的图像数据进行滤波，以将图像数据输出到在水平方向上非线性放大的图像上。 这些滤波器系数对应于为显示屏幕的n个部分设置的放大率。