公开(公告)号：US20040101169A1

公开(公告)日：2004-05-27

申请号：US10717745

申请日：2003-11-20

Applicant: STMicroelectronics S.A.

Inventor： Christel-Loic Tisse ,  Laurent Plaza ,  Guillaume Petitjean

IPC: G06K009/00

CPC classification number: G06K9/00597

Abstract: A method and a system determine a score characteristic of the definition of a digital imageby cumulating the quadratic norm of horizontal and vertical gradients of luminance values of pixels of the image, the pixels being chosen at least according to a first maximum luminance threshold of other pixels in the concerned direction.

Abstract translation: 一种方法和系统通过累积图像的像素的亮度值的水平和垂直梯度的二次方程来确定数字图像的定义的分数特征，所述像素至少根据其他像素的第一最大亮度阈值来选择 在有关方向。