A binary image is a digital image that has just two possible values destined for each pixel. In general two colors are used for a binary image i. e. black and white. Binarization is one of the most important pre-processing step which consists to divide foreground and background of document images. Image binarization is the method of division of pixel values into double collections, black as foreground and white as background. The average mean filter applied for image filtering. Triangular fuzzy logic method is best contrast enhancement method. Edge detection done by morphological operator in this paper. Thresholding has formed to be a well-known method used for binarization of document images. Global and local thresholding well-known technique for binarization. To improve the quality of the output binary image, Bradley method used in local thresholding. After binarization of document image, to discover the values of parameters. Parameters like PSNR, F-measure, NRM, MPM and DRD.

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Binarization Local Thresholding Global Thresholding Document Image