Abstract: In Image binarization, segmentation is a major technique which is used for the separation of foreground and background. Image Binarization technique is used to segment the degraded images in order to gain images similar to that of the original images of the documents. One of the well-known techniques for binarization of documents is-Thresholding. This technique is further classified into Global and local thresholding techniques. There are also many techniques for Binary documentation process. Hence the work states the different techniques of binarization which are used for improving the quality of degraded documents.

Keywords: Image binarization, Segmentation, Binary documentation, Thresholding.