基于OTSU的图像插值算法  

Image Interpolation Algorithm Based on OTSU

作　　者：张文翔 董宏林[1] ZHANG Wenxiang;DONG Honglin(School of Computer Science and Engineering,Nanjing University of Science and Technology,Nanjing 210094)

机构地区：[1]南京理工大学计算机科学与工程学院,南京210094

出　　处：《计算机与数字工程》2022年第1期186-189,共4页Computer & Digital Engineering

摘　　要：在图像畸变矫正和图像缩放过程中,需要使用插值算法对像素点进行插值。为了更好地保留图像的纹理细节,以及降低算法时间复杂度,论文提出一种基于OTSU的图像插值算法。利用被插值点四邻域像素的方差来划分图像区域,并采用OTSU算法确定阈值,对图像平坦区域采用双线性插值,而图像纹理细节部分采用双三次插值。实验结果表明,该算法很好地保留了图像细节部分,算法时间复杂度较低,获得的图像质量高,算法具有一定的实用价值。In the process of image distortion correction and image scaling,it is necessary to use interpolation algorithms to in⁃terpolate pixels.In order to better preserve the texture details of the image and reduce the time complexity of the algorithm,an image interpolation algorithm based on OTSU is proposed.The image area is divided by the variance of the four neighboring pixels of the in⁃terpolated points,and the threshold is determined using the OTSU algorithm.Bilinear interpolation is used for the flat area of the im⁃age,and bicubic interpolation is used for the details of the image texture.The experimental results show that the algorithm retains the details of the image well,the time complexity of the algorithm is low,the quality of the obtained image is high,and the algo⁃rithm has certain practical value.

关 键 词：图像插值 OTSU 方差 时间复杂度 图像质量 

分 类 号：TP301.6[自动化与计算机技术—计算机系统结构]