Image acquisition device removing distortion in image signals
AssigneeMinolta Co., Ltd.
InventorsSinji Harada, Takahiro Mouri, Masumi Shoji, Iwao Adachi
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Abstract
The image acquisition device of the present invention includes an image forming lens to form a condensed image, a CCD to convert a condensed image to electric signals, and flag table memory to store predetermined correction flags, which indicate whether or not to cull a pixel so as to correct distortion caused by the image forming lens. The image acquisition device further includes a distortion correction circuit to execute the culling of pixels included in image signals in accordance with a correction flag for each pixel. The image acquisition device removes the distortion component contained in the image signal in real time.
Claims29
An image acquisition device for converting an optical image formed via an optical system to a plurality of pixels, said image acquisition device comprising:
- a storage means for storing predetermined correction data, said correction data identifying which of said plurality of pixels are to be culled to correct for distortion of said optical system, and
- a correction means for executing the culling of said plurality of pixels by determining, for each pixel of said plurality of pixels, whether or not said each pixel of said plurality of pixels is to be culled in accordance with said correction data, and for said each pixel of said plurality of pixels that is to be culled, not writing said each pixel of said plurality of pixels that is to be culled to a pixel data output memory.
An image acquisition device comprising:
- an optical system for projecting an image,
- means for obtaining image data by reading the image projected by said optical system, said image data representing said projected image and including a plurality of pixels, and
- correction means for culling portions of said image data which represents a distortion of said image by determining, for each pixel of said plurality of pixels, whether or not said each pixel of said plurality of pixels is to be culled, and for said each pixel of said plurality of pixels that is to be culled, not writing said each pixel of said plurality of pixels that is to be culled to an image data output memory, said distortion being generated by said optical system.
An image acquisition device comprising:
- a projection lens for projecting an image;
- photoelectric conversion elements for reading the image projected by said projection lens and providing image data, the image data including a plurality of pixels,
- means for moving said projected image relative to said photoelectric conversion elements a constant speed in a subscan direction,
- memory for storing predetermined correction data corresponding to distortion caused by said projection lens;
- and
- correction means for culling said image data in accordance with said predetermined correction data by determining, for each pixel of said plurality of pixels, whether or not said each pixel of said plurality of pixels is to be culled, and for said each pixel of said plurality of pixels that is to be culled, not writing said each pixel of said plurality of pixels that is to be culled to an image data output memory.
An image acquisition device comprising:
- an image forming lens for forming a condensed image,
- an image sensor, comprising a plurality of photoelectric conversion elements, for converting a condensed image to electric signals, said condensed image represented by a plurality of pixels,
- a flag table memory for storing predetermined correction flags, each of said correction flags indicating whether a given pixel should be culled to correct for distortion caused by said image forming lens, and
- a distortion correction circuit for culling said plurality of pixels by determining, for each pixel of said plurality of pixels, whether or not said each pixel of said plurality of pixels is to be culled, and for said each pixel of said plurality of pixels that is to be culled, not writing said each pixel of said plurality of pixels that is to be culled to a pixel image output memory.
An image acquisition device comprising:
- a projection lens for projecting an image;
- conversion means for reading the image and converting the read image to a plurality of pixels;
- a pixel output memory receiving respective pixels to be output from the image acquisition device;
- a memory for storing predetermined correction data identifying which of said plurality of pixels are to be culled to correct for distortion caused by said projection lens;
- and
- a correction controller culling the plurality of pixels by determining, for each pixel of said plurality of pixels, whether or not said each pixel of said plurality of pixels is to be culled in accordance with said correction data, and for said each pixel of said plurality of pixels that is to be culled, not writing said each pixel of said plurality of pixels that is to be culled to a pixel data output memory.
Dependencies are inferred from the claim text.