Quasi-Convolution Pyramidal Blurring

Journal of virtual reality and broadcasting

Martin Kraus¹ 

[1] Technische Universität München$$

关键词: GPU;    blurring;    image processing;    pyramid algorithm;    real-time;    rendering;   

DOI  :  10.20385/1860-2037/6.2009.6

学科分类：计算机科学（综合）

来源: Di P P - N R W

【 摘 要 】

Efficient image blurring techniques based on the pyramid algorithm can be implemented on modern graphicshardware; thus, image blurring with arbitrary blur width is possible in real time even for large images. However, pyramidal blurring methods do not achieve the image quality provided by convolution filters; in particular, the shape of the corresponding filter kernelvaries locally, which potentially results in objectionable rendering artifacts. In this work, a new analysis filter is designed that significantly reduces this variation for a particular pyramidal blurring technique. Moreover, the pyramidal blur algorithm is generalized to allow for a continuous variation of the blur width. Furthermore, an efficient implementation for programmable graphics hardware is presented. The proposed method is named “quasi-convolution pyramidal blurring�? since the resulting effect is very close to image blurring based on a convolution filter for many applications.

【 授权许可】

Unknown