H - Electricity – 04 – N
Patent
H - Electricity
04
N
H04N 1/04 (2006.01) H04N 1/047 (2006.01) H04N 1/10 (2006.01) H04N 1/21 (2006.01) H04N 1/193 (2006.01)
Patent
CA 2121611
A scanner is so arranged that a quantity of light reaching a CCD sensor can be kept constant with a change in reading position. In cases where a light source and a reading optical unit are driven independent of each other, variations in feed amount inevitably occur. To deal with it, a test chart of a specified length is first read to measure amounts of movement of the light source and the reading optical unit. Then, the reading optical unit is moved by a predetermined amount. The light source is moved to effect a correction based on the amount of movement initially measured. Then, a one-line reading process is carried out to scan an image on a document.
Imagawa Takashi
Nagano Fumikazu
G. Ronald Bell & Associates
Sharp Kabushiki Kaisha
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