Image scanner and peak detecting processing method of image scanner
AssigneeToshiba Tec Kabushiki Kaisha
InventorYusuke Hashizume
Life of this patent
Estimating the term…
Abstract
A sheet image scanner of the present invention has plural image sensors to output electric signals by detecting optical image data that are obtained by applying a light from a light source to documents, amplifiers to amplify outputs from the plural image sensors, and a peak detection processing unit to detect a peak value of sensitivity of at least one of the plural image sensors and set a gain value for each of amplifiers for the plural image sensors using the detected peak value.
Claims17
An image scanner comprising:
- plural image sensors to detect optical image data by applying light from a light source to a document and output electric signals;
- amplifiers to amplify the outputs of plural image sensors;
- and
- a peak detection processing portion to set gain values of the amplifiers for the plural image sensors by detecting a peak value of sensitivity of at least one image sensor of the plural image sensors.
A peak detection processing method of an image scanner to scan images by amplifying electric signals converted from input optical image data in plural image sensors, wherein
- gain values for the amplifiers are set for each of the plural image sensors using an optional peak value of sensitivity detected from the electric signals converted in at least one of the plural image sensors.
Dependencies are inferred from the claim text.