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Apparatus and method for image configuring

外国特許コード F110005609
整理番号 RX03P13WO
掲載日 2011年9月9日
出願国 アメリカ合衆国
出願番号 59613704
公報番号 20070160310
公報番号 7657122
出願日 平成16年12月1日(2004.12.1)
公報発行日 平成19年7月12日(2007.7.12)
公報発行日 平成22年2月2日(2010.2.2)
国際出願番号 JP2004017881
国際公開番号 WO2005055592
国際出願日 平成16年12月1日(2004.12.1)
国際公開日 平成17年6月16日(2005.6.16)
優先権データ
  • 特願2003-401726 (2003.12.1) JP
  • 2004WO-JP17881 (2004.12.1) WO
発明の名称 (英語) Apparatus and method for image configuring
発明の概要(英語) (US7657122)
Using image data on a plurality of reduced object images to calculate a shift amount in regard to the gap of relative positions between the reduced object images by a correlation calculation between the reduced object images.
A conversion equation is obtained from the shift amount for geometric projection process from the object image to each of the reduced object images.
Initial image data on a single object image is generated using image data on the plurality of reduced object images.
The above are used to estimate images of each of the reduced object images.
A difference between the estimated image of the reduced object images and the reduced object images is projected in the reverse process of the geometric projection process, updating the image data on the single object image.
The processes are repeated until the difference satisfies a predetermined condition and a high resolution object image is outputted.
特許請求の範囲(英語) [claim1]
1. An image configuring apparatus comprising: an object image configuring means, which reads image data of a plurality of reduced object images from a reduced image recording means for recording image data of a plurality of reduced object images obtained by photographing an object as using a compound-eye camera that focuses a plurality of reduced object images on a photo detector through micro lens array having a plurality of micro lenses arrayed therein, and configures a single object image based on said image data and then outputs its image data,
wherein said object image configuring apparatus is also configured that said micro lens and said light receiving elements are set without alignment error, and preset in the conditions including the distance between object and micro lens array, using the aligning distance of each micro lens of lens array and the focal length of micro lens array, and based on such presetting condition, the magnification ratio of reducing optical system is calculated with the known distance to the object, and by obtaining the relation among one pixel of the reduced image element and its corresponding area of the object, and previously obtain the geometric transfer function Tk describing optical projection from the said real object to create said reduced image element and inverse transfer function Tk-1;
wherein said object image configuring means comprises:
a generating means of initial object image for generating an initial image data of a single object image based on an image data of a plurality of said reduced object images captured by said micro lens array under said known condition using said inverse transfer function Tk-1;
a reduced image estimating means for estimating an estimated image of each of said reduced object images from an image data of a provided single object image which comes from said generating means of initial object image, based on a geometric projection process where said transfer function Tk is used;
an object image updating means for updating an image data of said single object image provided in said reduced image estimating means by projecting a difference between said estimated image of each reduced object images which comes from said reduced image estimating means and each of said reduced object images which is captured under said known condition of micro lens array, using said inverse process Tk-1 of said geometric projection process; and
an iterative control means for firstly giving said initial image data to said reduced image estimating means as an initial value of an image data of said single object image, and then repetitively conducting an estimating processing of said reduced image estimating means as well as an updating processing of said object image updating means until said difference satisfying a predetermined condition, then outputting an image data of said single object image at the time of said difference satisfying said predetermined condition as a final image data of an object image.
[claim2]
2. An image configuring apparatus according to claim 1, wherein said object image configuring means further comprises a shift amount calculating means for calculating a shift amount in regard to a gap of relative positions between said reduced object images through correlation calculation between said reduced object images by using an image data of a plurality of said reduced object images.
[claim3]
3. An image configuring apparatus according to claim 2, wherein said object image configuring means further comprises a projection process deriving means for obtaining a conversion equation indicating said geometric projection process employed in said reduced image estimating means based on said shift amount obtained in said shift amount calculating means.
[claim4]
4. An image configuring apparatus according to claim 2, wherein said generating means of initial object image in said object image configuring means generates an image data of a single object image by arranging a plurality of said reduced object images onto a same area based on said shift amount obtained in said shift amount calculating means, and then generates an initial image data of said single object image by interpolating blank pixels with respect to said image data.
[claim5]
5. An image configuring method for configuring a single object image based on an image data of a plurality of reduced object images obtained by photographing an object as using a compound-eye camera that focuses a plurality of reduced object images on a photo detector having a plurality of light receiving elements through micro lens array having a plurality of micro lenses arrayed therein, comprising the steps of: configuring the plurality of micro lenses and the plurality of light receiving elements in corresponding micro lens/light receiving element pairs positioned without alignment error,
setting a distance between the object and the micro lens array, according to an aligning distance of each micro lens of lens array and the focal length of the micro lens array,
generating an initial image data of a single object image based on an image data of a plurality of said reduced object images using known conditions and an inverse transfer function Tk-1;
estimating an estimated image of each of said reduced object images from an image data of a provided single object image based on a geometric projection process using a transfer function Tk;
updating an image data of said single object image provided in said reduced image estimating process by projecting a difference between estimated images of each of said reduced object images and each of said reduced object images in an inverse process (Tk-1) of said geometric projection process; providing said initial image data to said reduced image estimating process as an initial value of an image data of said single object image;
repetitively conducting said reduced image estimating process as well as said object image updating process until said difference satisfying a predetermined condition; and
outputting image data of said single object image at the time of said difference satisfying said predetermined condition as a final image data of an object image.
  • 発明者/出願人(英語)
  • TANIDA JUN
  • NITTA KOUICHI
  • JAPAN SCIENCE AND TECHNOLOGY AGENCY
国際特許分類(IPC)
米国特許分類/主・副
  • G06T003/40
  • H04N005/225C4
  • H04N005/335
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