Zeng Jie-Xian, Zhu Xiao-Chao, Fu Xiang. Image linear feature extraction based on improved structureless algorithms of beamlet transform[J]. Journal of Image and Graphics, 2010, 15(12): 1748. DOI: 10.11834/jig.20101212.
Traditional linear feature detection methods based on structureless algorithms of Beamlet transform are mostly used to detect simple line segments and curves
while fail to detect complicated edges in natural images. Wavelet transform has great advantages in point feature detection
meaning that it is good at detecting edge and details. In this paper we improve traditional methods with the help of wavelet. Meanwhile
energy function in traditional algorithm is improved and a new drawing linear feature rule is proposed in order to represent a dyadic square with at most one optimal Beamlet. First
image is decomposed into low frequency and high frequencies with wavelet to highlight edge detail feature; second
the edge image’s transform coefficients are obtained by Beamlet transform. Finally the coefficients are dealt with using the improved energy function and linear features are extracted following the new drawing rule. Experimental results show that without costing obvious extra computing time
our proposed method can extract complete and clear linear features in natural images.