Object extraction method, and image sensing apparatus using the method
First Claim
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1. An object extraction method for extracting a predetermined object from a sensed image, comprising the steps of:
- automatically changing a shape and/or a size of reference image associated with object extraction on the basis of at least an image sensing parameter of an image sensing means relative to an image sensing condition upon image sensing or an image sensing environment upon image sensing; and
extracting the predetermined object image from the sensed image by searching an image corresponding to the reference image changed in a shape and/or a size by said changing step;
wherein said image sensing parameter includes at least one of a focusing signal upon image sensing, focal length data of said image sensing means, and visual axis direction data and an illumination light condition upon image sensing.
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Abstract
This invention provides an object extraction method for performing processing for extracting and cutting out a specific object from a sensed image at high speed, and an image sensing apparatus using the method. In this invention, in a method of extracting an object by comparing a sensed image and a standard image, a focusing signal, focal length data, visual axis direction data, and illumination conditions are detected, and the initial size, initial position, or initial color of the standard image is changed on the basis of the detection results, and extraction is started under optical conditions.
182 Citations
34 Claims
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1. An object extraction method for extracting a predetermined object from a sensed image, comprising the steps of:
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automatically changing a shape and/or a size of reference image associated with object extraction on the basis of at least an image sensing parameter of an image sensing means relative to an image sensing condition upon image sensing or an image sensing environment upon image sensing; and
extracting the predetermined object image from the sensed image by searching an image corresponding to the reference image changed in a shape and/or a size by said changing step;
wherein said image sensing parameter includes at least one of a focusing signal upon image sensing, focal length data of said image sensing means, and visual axis direction data and an illumination light condition upon image sensing. - View Dependent Claims (2, 3, 4)
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5. An image information extraction apparatus comprising:
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image sensing means for generating an image by sensing an object;
reference image storage means for storing a reference image to be compared with the image output from said image sensing means;
initialization means for automatically initializing the reference image by correcting a shape and/or a size of the reference image on the basis of at least an image sensing parameter of said image sensing means relative to an image sensing state when said image sensing means senses the object; and
image comparison means for comparing the reference image corrected in a shape and/or a size by said initialization means with the image output from said image sensing means, and determining the presence of the object when similarity between the two images exceeds a predetermined value;
wherein said image sensing parameter includes at least one of a focusing signal upon image sensing, focal length data of said image sensing means, and visual axis direction data and an illumination light condition upon image sensing. - View Dependent Claims (6, 7, 8, 9, 10, 11, 12, 13)
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14. An image information extraction apparatus comprising:
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image sensing means for generating an image by sensing an object;
image sensing mode extraction means for extracting an image sensing mode when said image sensing means senses the object;
image sensing mode storage means for storing the image sensing mode extracted by said image sensing mode extraction means;
image storage means for storing the image output from said image sensing means;
reference image storage means for storing reference image information to be compared with the image output from said image sensing means;
initialization means for automatically initializing the reference image by correcting a shape and/or a size of the reference image on the basis of at least an image sensing parameter of said image sensing means relative to the image sensing mode extracted by said image sensing mode extraction means;
image comparison means for comparing the reference image corrected in a shape and/or a size by said initialization means with the image output from said image sensing means; and
image cutting means for cutting out an image on the basis of the output from said image comparison means;
wherein said image sensing parameter includes at least one of a focusing signal upon image sensing, focal length data of said image sensing means, and visual axis direction data and an illumination light condition upon image sensing. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22)
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23. An image information extraction method for searching for a specific object by executing:
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image generation processing for generating an image by sensing an object;
extraction processing for extracting an image sensing state in the case that the image is generated by performing the image generation processing;
reference image reading processing for reading out reference image from storage means to be compared with the image generated by the image generation processing from storage means;
initialization processing for automatically initializing the reference image read out from the storage means by the reference image reading processing by correcting a shape and/or a size of the reference image on the basis of at least an image sensing parameter of an image sensing means relative to the image sensing state extracted by the extraction processing; and
image comparison processing for comparing the reference image corrected in a shape and/or a size by the initialization processing with the image generated by the image generation processing;
wherein said image sensing parameter includes at least one of a focusing signal upon image sensing, focal length data of said image sensing means, and visual axis direction data and an illumination light condition upon image sensing.
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24. An image information extraction apparatus comprising:
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image sensing means for generating an image by sensing an object;
image sensing mode storage means for storing an image sensing mode when said image sensing means senses the object;
image storage means for storing the image output from said image sensing means;
reference image storage means for storing a reference image to be compared with the image output from said image sensing means;
initialization means for automatically initializing the reference image by correcting a shape and/or a size of the reference image on the basis of at least an image sensing parameter of said image sensing means relative to the image sensing mode stored in said image sensing mode storage means; and
image comparison means for comparing the reference image corrected in a shape and/or a size by said initialization means with the image output from said image sensing means, and determining the presence of the object when similarity between the two images exceeds a predetermined value;
wherein said image sensing parameter includes at least one of a focusing signal upon image sensing, focal length data of said image sensing means, and visual axis direction data and an illumination light condition upon image sensing. - View Dependent Claims (25, 26, 27, 28, 29, 30, 31, 32)
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33. A computer program product comprising a computer usable medium having computer readable program code means for extracting an object from a sensed image, including:
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computer reading program code means for changing a shape and/or a size of reference image associated with object extraction on the basis of at least an image sensing parameter of an image sensing means relative to an image sensing condition upon image sensing or an image sensing environment upon image sensing; and
computer readable program code means for extracting the object from the sensed image by searching an image corresponding to the reference image;
wherein said image sensing parameter includes at least one of a focusing signal upon image sensing, focal length data of said image sensing means, and visual axis direction data and an illumination light condition upon image sensing. - View Dependent Claims (34)
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Specification