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Abstract: Single image deblurring is a highly ill-posed problem and requires to be regularized. Many common forms of image prior have a major drawback that is unable to make full use of local image information. In this paper, we propose a single image deblurring method using novel image prior constraints. We establish a probabilistic model by enforcing inspired image prior constraints and adopt an advanced iterative scheme that alternates between blur kernel estimation and non-blind image restoration. To suppress ringing artifacts caused by inevitable blur kernel estimated errors, our method employs total variation image restoration and presents an alternation half-quadratic algorithm to solve the non-convex cost function. Finally, experiments show that our method has good performance in suppressing ringing artifacts, and makes a good balance between alleviating staircase effects and preserving image details. [Copyright &y& Elsevier]

2-(N-tert-butoxycarbonylamino) pyridine and 2-(N-tert-butoxycarbonylamino)-3-methylpyridine were synthesized in a one-step method using either 2-aminopyridine or 2-amino-3-methyphyridine with tert-butylcarbonyl anhydride as the starting materials. The products were characterized by single-crystal X-ray diffraction, 1H NMR, 13C NMR, and HRMS. The biological activity of the two compounds against five fungi was determined. 2-(N-tert-butoxycarbonylamino) pyridine has more than 50% inhibitory activity against Pyricularia oryzae, Colletotrichum gloeosporioides, and Alternaria alternate. In addition, the inhibitory activity of 2-(N-tert-butoxycarbonylamino)-3-methylpyridine against Alternaria alternate reached 67.69%. Two 2-BOC aminopyridine derivatives were synthesized and structurally characterized by 1H NMR, 13C NMR, HRMS analysis and X-ray crystal diffraction. The inhibitory activity both compounds was studied. [ABSTRACT FROM AUTHOR]