Local Polar DCT Features for Image Description

Local Polar DCT Features for Image Description
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用于图像描述的局部极地 DCT 特征

DOI:
10.1109/lsp.2012.2229273
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发表时间:
2013
影响因子:
3.9
通讯作者:
Hongliang Li
Hongliang Li
中科院分区:
工程技术2区
文献类型:
--
作者:
Tiecheng Song;Hongliang Li

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我们提出了一种新的特征描述符,局部极性DCT特征(LPDF),这是强大的各种图像变换。具体地说,在设计的极坐标几何结构中对局部块进行量化,然后提取二维DCT特征并重新排列。所得到的DCT系数的子集被选为我们的紧凑LPDF描述符。我们采用最先进的方法进行全面的绩效评估,即,SIFT、DAISY、LIOP和GLOH在标准Oxford数据集和两个额外的测试图像对上进行。实验结果表明,所提出的描述符的优越性,在各种图像变换,即使是非常低的维度。
We present a novel feature descriptor, Local Polar DCT Features (LPDF), which is robust to a variety of image transformations. Specifically, the local patch is quantized in the designed polar geometric structure and the 2-D DCT features are then extracted and rearranged. A subset of the resulting DCT coefficients is selected as our compact LPDF descriptor. We perform a comprehensive performance evaluation with state-of-the-art methods, i.e., SIFT, DAISY, LIOP, and GLOH on the standard Oxford dataset and two additional test image pairs. Experimental results demonstrate the superiority of proposed descriptor under various image transformations, even with very low dimensions.
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