Image input apparatus
AssigneeCanon Kabushiki Kaisha
InventorSeiji Hashimoto
Life of this patent
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Abstract
An image input apparatus for sequentially obtaining a plurality of partial images which are portions of an image of an object, by relatively moving the object and a sensor having a plurality of pixel circuit units, including a drive circuit which effects control so as to store photoelectric charge en bloc at photoelectric conversion units respectively included in the plurality of pixel circuit units, then blanket-transfer optical signals of the photoelectric conversion units respectively included in the plurality of pixels to memory units included in the corresponding pixel circuit units, and then read the photoelectric signals, and noise signals generated in the pixel circuit units in this order from the pixel circuit units.
Claims8
An image input apparatus for sequentially obtaining a plurality of partial images which are portions of an image of an object, by relatively moving the object and a sensor having a plurality of pixel circuit units, comprising:
- a drive circuit which effects control so as to store photoelectric charge en bloc in photoelectric conversion units respectively included in said plurality of pixel circuit units, then blanket-transfer optical signals of said photoelectric conversion units respectively included in the plurality of pixels to memory units included in the corresponding pixel circuit units, and then read the photoelectric signals, and noise signals generated in the pixel circuit units in this order from the pixel circuit units.
An image input apparatus for dividing and obtaining an image of an object so that the obtained object images overlap with each other, by relatively moving the object and a sensor, comprising:
- image synthesis means for correcting an overlap portion of a plurality of images outputted from the sensor to synthesize the plurality of images.
An image input apparatus comprising:
- a sensor including a plurality of pixels;
- a switch circuit which switches between a first reading mode for reading images from the plurality of pixels of said sensor and a second mode for reading images from a plurality of pixels smaller in number than the pixels used by the first mode;
- and
- a detection circuit which detects whether or not there is an object on said sensor by the second reading mode,
- wherein in case that the presence of object on said sensor is detected by said detection circuit, the process is switched to the first reading mode.
An image input apparatus comprising:
- a sensor including a plurality of pixels;
- a switch circuit which switches between a first reading mode for reading images from the plurality of pixels of said sensor and a second mode for reading images from a plurality of pixels smaller in number than the pixels used by the first mode;
- and
- a detection circuit which detects relative movements of said sensor and an object by the second reading mode,
- wherein in case of the relative movements is detected by said detection circuit, the process is switched to the first reading mode.
An image input apparatus for sequentially obtaining a plurality of partial images which are portions of an image of an object, by relatively moving the object and a sensor having a plurality of pixels, comprising:
- a control circuit which controls a timing of obtaining data of the plurality of partial images to be synthesized, on the basis of comparison of the data of the plurality of partial images.
Dependencies are inferred from the claim text.