eliminating edges

Hello guys, who tells me how to remove the edges and the center line? So as to have only the characters? Thank you https://03054610326450256607.googlegroups.com/attach/6315ce91be5fc/temp_4_ocr_00000.tmp0%20%28copia%29.png?part=0.1&view=1&vt=ANaJVrEA5QNN9CpW0JdRj0nKVP_fOZ5ccAPqjSr99WX3LA4b-SRxngIE2K4IfyIJOtDCLZLxhZkmCJOD8SGstgm-G4R6R6pJHWsmvlDzm9f8mqwHOHNiFoU