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Intelligent Data Acquisition and Information Process Technologies
and Their Applications. Part II.




Vol. 19, Special Issue, February 2013, pp.89-93



An Improved Bilinear Interpolation Algorithm Using Center Coordinates of Pixels


1, 2,* Jing Lu, 1 Min Xia, 1 Wei Li, and 1 Ke-Cheng Yang

1 Wuhan National Laboratory for Optoelectronics,

College of Optoelectronic Science and Engineering,

Huazhong University of Science and Technology, Wuhan, 430074, China

2 Department of Computer Science and Technology, Hubei University of Education,

Wuhan, 430205, China

E-mail: lujing8102@126.com


Received: 2012   /Accepted: 15 January 2013   /Published: 19 February 2013

Digital Sensors and Sensor Sysstems


Abstract: How to guarantee high image quality is the key point when converting standard-definition television (SDTV) images to high-definition television (HDTV) images. Unfortunately, the change of pixel shape from rectangular to square makes traditional interpolation methods inappropriate because traditional methods are based on integer coordinates. In this paper, a novel interpolation algorithm using center coordinates of pixels (IAUCCP) is proposed. The color value of each pixel on HDTV images is revised by correcting the pixel’s xy coordinates. Considering the huge enlarging multiples, sharpening treatment is done to the HDTV images after interpolating. Experiments show that our method greatly improves the HDTV image quality comparing with traditional interpolation algorithms.


Keywords: Center coordinates of pixels, Bilinear interpolation, Image zooming, HDTV, SDTV


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