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Sparsity preserving projections (SPP) rooted in compressive sensing has already been successfully applied in face recognition. SPP is based on subspace analysis. The key of methods based on subspace analysis is seeking a good projection matrix to extract the features. It allows the desirable characteristics in the original high-dimensional space can be preserved in the low-dimensional subspace. In SPP, projection matrix is closely related to sparse weighting vector, so the key of SPP is seeking a sparse weighting vector as well as possible to describe the original signals. In order to get a better sparse weighting vector and gain a higher recognition rate, we proposed a new method integrating Radon transform and SPP (RadonSPP). In this paper, we conduct experiments on the public BJUT Eyebrow Database to verify the feasibility and validity of the proposed method. In addition, the experiment results show that the method integrating Radon transform and SPP can gain a higher recognition rate than SPP, and we explain the reason.
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