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US 6,163,342 AGranted
Image sensing method and apparatus
AssigneeCanon Kabushiki Kaisha
InventorMasao Suzuki
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AssigneeCanon Kabushiki Kaisha
InventorMasao Suzuki
Estimating the term…
When a selecting unit selects a second mode for sensing a document or the like, image signals obtained by exposing an exposing unit enters a second mode unit through a clamping unit and the selecting unit. High resolution image signals are generated in the second mode unit. Meanwhile, levels of the electrical image signals are detected by a detecting unit, and a control unit performs either exposure control by the exposing unit and gain control by a gain control unit or both in accordance with a peak level of the detected levels of the electrical image signals. At the same time, a correction unit sets a target value for the levels of the electrical image signals in accordance with a selected mode. The electrical image signals are controlled so that the detected levels approach the target value, thereby a document, an illustration, and the like can be sensed in high resolution and an image of high quality can be obtained regardless of character density in the document.
An image sensing apparatus having image sensing elements for converting an optical image of an object into electrical image signals and constructed so as to generate low resolution image signals on the basis of the electrical image signals in a first mode or to generate high resolution image signals in a second mode, selectively, comprising:
An image sensing method comprising the steps of:
An image pickup apparatus comprising:
An image pickup apparatus comprising:
An image pickup apparatus comprising:
Dependencies are inferred from the claim text.