[3] [3] Vese L A,Chan T F.A multiphase level set framework for image segmentation using the Mumford and Shah model［J］.International Journal of Computer Vision. 2002.50(3):271-293.

[4] [4] Li C,Kao C Y,Gore J C,et al. Implicit active contours driven by local binary fitting energy［C］. Conference on Computer Vision and Pattern Recognition.Washington D C:IEEE.2007:1-7.

[5] [5] Zhang K, Song H, Zhang L. Active contours driven by local image fitting energy［J］. Pattern Recognition, 2010, 43(4):1199-1206.

[6] [6] Bataineh B, Abdullah S N H S, Omar K. An adaptive local binarization method for document images based on a novel thresholding method and dynamic windows［J］. Pattern Recognition Letters, 2011, 32(14):1805-1813.

[7] [7] Ntirogiannis K, Gatos B, Pratikakis I. A combined approach for the binarization of handwritten document images［J］. Pattern Recognition Letters, 2014, 35(1):3-15.

[9] [9] Chang Y F, Pai Y T, Ruan S J. An Efficient Thresholding Algorithm for Degraded Document Images Based on Intelligent Block Detection［C］. International Conference on Systems. IEEE, 2009:.

[11] [11] Niblack W. An introduction to digital image processing［M］.New Jersey: Prentice Hall, 1986. 115-116.

[12] [12] Sauvola Sauvola J, Pietik Inen M. Adaptive document image binarization［J］. Pattern Recognition, 2000, 33(2):225-236.

[13] [13] Badekas E, Papamarkos N. Automatic Evaluation of Document Binarization Results［J］. Lecture Notes in Computer Science, 2005, 3773:1005-1014.

[14] [14] Romen Singh T, Sudipta Roy, Imocha Q Singh. A New Local Adaptive Thresholding Technique in Binarization ［J］. International Journal of Computer Science Issues. 2011,8(6):271-277.

[16] [16] Liu T, Sun J, Zheng N N, et al. Learning to detect a salient object［C］. IEEE Conference on Computer Vision & Pattern Recognition. IEEE, 2007.

[17] [17] Chen C L P, Hong L, Wei Y, et al. A local contrast method for small infrared target detection［J］. IEEE Transactions on Geoscience & Remote Sensing, 2013, 52(1):574-581.

[19] [19] Lin K H,Chen S L,Mittra R. A looped-bowtie RFID tag an tenna design for metallic objects ［J］.IEEE Transactions on Antennas ＆ Propagation,2013,61 (2) :499-505.

[22] [22] Song J,Delp E J.The analysys of morphological filters with multiple structuring elements［J］.Computer Vision Graphics and Image Processing,1990.50:308-328.