公开(公告)号：EP1574994A1

公开(公告)日：2005-09-14

申请号：EP04354011.1

申请日：2004-03-11

Applicant: STMicroelectronics S.r.l. ,  STMicroelectronics S.A.

Inventor： Rovati, Fabrizio Simone ,  Zambotti, Paolo Sergio ,  Mellot, Pascal Jean

IPC: G06T7/20

CPC classification number: G06T7/207

Abstract: A method for estimating motion in a sequence of bidimensional arrays of sampled values (e.g. video frames), includes the step of generating (104; 114) estimated motion vectors having at least one component along at least one reference axis (x, y). Motion estimation is performed with a given resolution (110, 112), and the method includes at least one of:

dynamically varying (110, 112) the resolution between subsequent estimation steps (114), and
if said estimated motion vectors have two components along two reference axes (x, y), selectively varying (110, 112) the resolution of motion estimation independently along said two axes (x, y).

Preferred application is in optical mouse arrangements.

Abstract translation: 一种用于在采样值（例如视频帧）的二维阵列的序列估计运动的方法，包括：生成步骤（104; 114）沿至少一个参考轴线（X，Y），其具有至少一个分量估计的运动向量。 运动估计执行与给定的分辨率（110，112），并且该方法包括以下至少一个：动态地改变（110，112）的后续估计步骤（114）之间的分辨率，并且如果所述估计的运动矢量沿着具有两个部件 两个参考轴（x，y）的选择性地改变（110，112）的运动估计unabhängig的分辨率沿着所述两个轴（X，Y）。 优选的应用是在光学鼠标的安排。

公开(公告)号：EP1574993A1

公开(公告)日：2005-09-14

申请号：EP04354010.3

申请日：2004-03-11

Applicant: STMicroelectronics S.r.l. ,  STMicroelectronics SA

Inventor： Rovati, Fabrizio Simone ,  Zambotti, Paolo Sergio ,  Mellot, Pascal Jean

IPC: G06T7/20

CPC classification number: G06T7/20

Abstract: A system for estimating motion from a sequence of bidimensional arrays of sampled values (e.g. video frames) includes a motion estimator (PC) configured for performing motion estimation between a current frame and a reference frame to derive an estimated motion vector (V). The motion estimator (PC) is configured for performing, if at least one of the components of the estimated motion vector is null, at least one of the steps of:

a) maintaining said reference frame as the reference frame for motion estimation with a further frame in said sequence, and
b) reducing the frame rate of said sequence of arrays.

Preferred application is in optical mouse arrangements.

Abstract translation: 一种用于从采样值（例如视频帧）的二维阵列的序列估计运动系统包括被配置用于当前帧和参考帧之间执行运动估计来导出估计运动向量（V）的运动估计器（PC）。 运动估计器（PC）被配置用于执行，如果所估计的运动向量的分量中的至少一个是零，以下步骤中的至少一个：a）维持所述参考帧作为用于运动估计的参考帧与另外的 所述序列帧，和b）降低阵列的所述序列的帧速率。 优选的应用是在光学鼠标的安排。

公开(公告)号：EP1574994B1

公开(公告)日：2012-05-30

申请号：EP04354011.1

申请日：2004-03-11

Applicant: STMicroelectronics Srl ,  STMicroelectronics S.A.

Inventor： Rovati, Fabrizio Simone ,  Zambotti, Paolo Sergio ,  Mellot, Pascal Jean

IPC: G06T7/20

CPC classification number: G06T7/207