Image input device
AssigneeMatsushita Electric Industrial Co., Ltd.
InventorsYoshio Takahashi, Fumio Fujimura
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Abstract
In an image input apparatus having an image sensor composed of plural chips, the stepwise difference in density on a chip boundary is made inconspicuous by a few compensation memories. The image input apparatus obtains the stepwise differences in density between pixels positioned in the adjacent places to adjoining chips 2 and 3 of the image sensor for plural lines and averages the differences, and reads an image and displays the same on a screen after compensating the stepwise difference in density between the chips for each line by using the average value.
Claims24
An image input apparatus having an image reading unit which is constructed by arranging plural chips integrally wherein
- a stepwise difference in density between image signals which are respectively read by adjacent chips consisting of plural read pixels, which chips have different reading sensitivities, is successively calculated at a time of image reading, and
- the image signals which are respectively read by the adjacent chips are compensated such that the difference in density between the image signals is compensated.
Dependencies are inferred from the claim text.