Paper Info
Title
Improved LUT-Based Image Warping for Video Cameras
Abstract
Image warping is usually used to perform real-time geometry transformation for video cameras. Several existing look-up table (LUT)-based algorithms achieve real-time performance, but the size of LUT is large and it has to be stored into off-chip memory. To reduce latency and bandwidth requirements due to using off-chip memory, this paper proposes an improved LUT (ILUT) scheme which compresses the LUT small enough that it can be stored in on-chip memory. Firstly, a one-stop transformation is adopted instead of several stages of on-line calculation. Then, the memory size of LUT is reduced by utilizing the similarity of neighbor coordinates and the symmetric characteristic of some image warping. Moreover, an elaborate pipeline hardware structure, cooperating with a novel 25-point interpolation algorithm, is proposed to accelerate the system and save further usage of memory. The proposed system is implemented by a field-programmable gate array-based platform. Two different examples show that the proposed ILUT achieves a real-time performance with small memory usage and low system requirements.
Year
DOI
Venue
2011
10.1109/CSE.2011.83
C3S2E
Keywords
Field
DocType
video cameras,proposed ilut,off-chip memory,image warping,improved lut-based image,on-chip memory,small memory usage,low system requirement,lut small enough,improved lut,memory size,real-time performance,image processing,look up table,interpolation,field programmable gate arrays,computational geometry,real time,fpga,chip,field programmable gate array
Lookup table,Computer vision,Image warping,Computer science,Interpolation,Computational geometry,Field-programmable gate array,Image processing,Geometric transformation,Gate array,Artificial intelligence
Conference
Citations 
PageRank 
References 
2
0.41
8
Authors
6
Name
Order
Citations
PageRank
Lin-bo Luo118915.97
Changshuai Wang261.59
Jun Chen320.41
Sangwoo An420.75
Yeumcheul Jeung520.41
Jong-Wha Chong612032.87