A method to fade-out the streak image used in the scanner with staggered sensor for scanning the documents includes the following steps, to judge whether the absolute value obtained by deducting to n+1 number of picture element obtained by the scan of the scanning line with the streak phenomenon from number (n refering to a positive integer) of picture element obtained by the scan is smaller than the critical value or not first, then to revised the number of picture element obtained by the scan as the processed n number of picture element when the absolute value is smaller than the critical value. |