公开(公告)号：US20110176744A1

公开(公告)日：2011-07-21

申请号：US12657753

申请日：2010-01-27

申请人： Sung-Jea Ko ,  Jong-Woo Han ,  Sung-Hyun Cheon ,  Tae-Shick Wang

发明人： Sung-Jea Ko ,  Jong-Woo Han ,  Sung-Hyun Cheon ,  Tae-Shick Wang

IPC分类号： G06K9/40 ,  G06K9/32

CPC分类号： G06T3/4007

摘要： An apparatus and method for image interpolation using an anisotropic Gaussian filter, the image interpolation apparatus including: an edge information calculator calculating a first edge orientation that is an orientation of an edge of each of a plurality of pixels that constitute an input low resolution image, and first edge orientation energy that is a maximal strength of the edge corresponding to the first edge orientation; an image enlarging unit calculating a second edge orientation and second edge orientation energy of each of pixels to be interpolated, which are obtained by subtracting reference pixels corresponding to each of the pixels of the low resolution image among a plurality of pixels that constitute the high resolution image that is obtained by enlarging the low resolution image, based on the first edge orientation and the first edge orientation energy of the adjacent reference pixels; and a pixel value calculator calculating a value of each of the pixels to be interpolated, by using an interpolation filter having a direction and a width determined according to the second edge orientation and the second edge orientation energy of each of the pixels to be interpolated. The Gaussian filter having a direction and a width that are adaptively adjusted according to an orientation and strength of an edge is used to interpolate values of pixels of a high resolution image that is obtained by image enlargement so that deterioration of image quality can be minimized with a small amount of calculation and an image with high quality and high resolution can be generated.

摘要翻译： 一种使用各向异性高斯滤波器进行图像插值的装置和方法，所述图像插值装置包括：边缘信息计算器，计算作为构成输入低分辨率图像的多个像素中的每一个的边缘的取向的第一边缘取向， 以及第一边缘取向能量，其是对应于第一边缘取向的边缘的最大强度; 图像放大单元，其计算要被内插的每个像素的第二边缘取向和第二边缘取向能量，其通过在构成高分辨率的多个像素中减去与低分辨率图像的每个像素相对应的参考像素来获得 通过基于相邻参考像素的第一边缘取向和第一边缘取向能量扩大低分辨率图像而获得的图像; 以及像素值计算器，通过使用具有根据要插值的每个像素的第二边缘取向和第二边缘取向能量确定的方向和宽度的内插滤波器来计算要插值的每个像素的值。 具有根据边缘的取向和强度自适应地调整的方向和宽度的高斯滤波器用于内插通过图像放大获得的高分辨率图像的像素的值，从而可以最小化图像质量的劣化， 可以产生少量的计算和具有高质量和高分辨率的图像。