The document digitization is one of the emerging trends of digitization. The digitization of documents allows retrieving of information from paper document. This information can be ECG, EEG, humidity etc. The document digitization process involves conversion of paper document into image and processing of obtained image to extract information. The digitized signals can be directly applied to present prediction algorithms. As the digitization literature is surveyed, the process of extraction of digital signal from scanned paper document plays very important role in document digitization process. Generally this is done using horizontal scanning. This paper emphasize on use of vertical scanning for extraction of signal trace from paper documents in contrast to horizontal scanning. The vertical scanning method reduces complexity of the digitization process as well as gives accurate digitization.