Motion detection and image acquisition apparatus and method of detecting the motion of and acquiring an image of an object
First Claim
Patent Images
1. Apparatus for capturing images of a record of micro-images, the record of micro-images including non-sparse images, the apparatus comprising:
- image acquisition means for repeatedly acquiring and at least temporarily storing successive non-sparse images from the record of micro-images;
the image acquisition means including an area sensor disposed to receive light from the non-sparse images;
and the apparatus further including a second sensor disposed to receive light from the record of micro-images, the second sensor being operatively connected to the storage means for supplying images to the storage means;
correlation means for correlating successive non-sparse images from the record of micro-images to create a correlation matrix and determine if motion of the record of micro-images has occurred between successive images of the record of micro-images;
the correlation means including means to;
(i) calculate the Fourier transform of the correlation matrix to produce a phase spectrum, the Fourier transform defining a frequency space having axes and the phase spectrum defining a plane in the frequency space; and
(ii) calculate the degree of movement of the current image from the reference image using the projection of the plane onto the axes of the frequency space; and
storage means for permanently storing an image of the record of micro-images when motion has occurred between successive images.
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Abstract
An image acquisition device for microfiche images which uses solid state sensor and supporting electronics to continuously digitize the image at high frame rates, and uses the correlation function of the current frame with respect to the previously saved reference frame to derive the image motion vector, keeping only frames whose image motion vector indicates motion of more than 1 unit of resolution, and reconstruct the acquired image as a mosaic of the save image frames and its associated motion vector.
96 Citations
35 Claims
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1. Apparatus for capturing images of a record of micro-images, the record of micro-images including non-sparse images, the apparatus comprising:
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image acquisition means for repeatedly acquiring and at least temporarily storing successive non-sparse images from the record of micro-images; the image acquisition means including an area sensor disposed to receive light from the non-sparse images; and the apparatus further including a second sensor disposed to receive light from the record of micro-images, the second sensor being operatively connected to the storage means for supplying images to the storage means; correlation means for correlating successive non-sparse images from the record of micro-images to create a correlation matrix and determine if motion of the record of micro-images has occurred between successive images of the record of micro-images; the correlation means including means to; (i) calculate the Fourier transform of the correlation matrix to produce a phase spectrum, the Fourier transform defining a frequency space having axes and the phase spectrum defining a plane in the frequency space; and (ii) calculate the degree of movement of the current image from the reference image using the projection of the plane onto the axes of the frequency space; and storage means for permanently storing an image of the record of micro-images when motion has occurred between successive images. - View Dependent Claims (2, 3, 4, 5)
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6. A method of controlling a device using an area sensor to detect motion of an object, the method comprising the steps of:
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repeatedly acquiring and at least temporarily storing successive electronic images of at least a non-sparse part of the object, the successive electronic images including at least a reference electronic image and a current electronic image; correlating the reference electronic image with the current electronic image in a computing device to determine if motion has occurred between them including the steps of; (a) correlating the electronic reference image with the current electronic image to yield a correlation matrix; (b) calculating the Fourier transform of the correlation matrix to produce a phase spectrum, the Fourier transform defining a frequency space having axes and the phase spectrum defining a plane in the frequency space; and (c) calculating the degree of movement of the current electronic image from the reference electronic image using the projection of the plane onto the axes of the frequency space; producing control signals upon calculating the degree of movement of the current electronic image from the reference electronic image; and providing the control signals to a controller to control operation of the device using the control signals. - View Dependent Claims (7, 8, 9, 10, 11, 12)
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13. Apparatus for controlling a device using an area sensor to detect motion of an object, the apparatus comprising:
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an area sensor for repeatedly acquiring and at least temporarily storing successive electronic images of at least a non-sparse part of the object, the successive electronic images including at least a reference electronic image and a current electronic image; computing means connected to receive signals from the area sensor for correlating the reference electronic image with the current electronic image to determine if motion has occurred between the reference electronic image and the current electronic image including; (a) means for correlating the electronic reference image with the current electronic image to yield a correlation matrix; (b) means for calculating the Fourier transform of the correlation matrix to produce a phase spectrum, the Fourier transform defining a frequency space having axes and the phase spectrum defining a plane in the frequency space; and (c) means for calculating the degree of movement of the current electronic image from the reference electronic image using the projection of the plane onto the axes of the frequency space; an interface for producing control signals upon calculating the degree of movement of the current electronic image from the reference electronic image; and a controller operatively connected to the interface and the device to control operation of the device using the control signals. - View Dependent Claims (14, 15, 16, 17, 18, 19)
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20. A method of controlling a device using an area sensor to detect motion of an object, the method comprising the steps of:
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repeatedly acquiring with an area sensor and at least temporarily storing successive electronic images of only a non-sparse areal subset of the object, the successive electronic images including at least a reference electronic image and a current electronic image; determining when movement has occurred between successive images of the object by correlation of the reference electronic image with the current electronic image and producing a control signal when movement has occurred; correlation of the reference electronic image and the current electronic image including; (a) correlating the electronic reference image with the current electronic image to yield a correlation matrix; (b) calculating the Fourier transform of the correlation matrix to produce a phase spectrum, the Fourier transform defining a frequency space having axes and the phase spectrum defining a plane in the frequency space; and (c) calculating the degree of movement of the current electronic image from the reference electronic image using the projection of the plane onto the axes of the frequency space; and providing the control signals to a controller to control operation of the device using the control signals.
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21. A method of controlling a device using an area sensor to detect motion of an object, the device having a field of view and the object being in the field of view of the device, the method comprising the steps of:
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repeatedly acquiring with an area sensor and at least temporarily storing successive electronic images of only a non-sparse areal subset of the object, the successive electronic images including at least a reference electronic image and a current electronic image; determining when movement has occurred between successive images of the object by correlation of the reference electronic image with the current electronic image and producing a control signal when movement has occurred; providing the control signals to a controller to control operation of the device using the control signals; and permanently storing an electronic image of the object by acquiring the electronic image using a second sensor when motion of the object has occurred. - View Dependent Claims (22, 23, 24, 25, 26)
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27. Apparatus for controlling a first sensor using an area sensor to detect motion of an object, the first sensor having a field of view and the object being observable in the field of view of the first sensor, the apparatus comprising:
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an area sensor for repeatedly acquiring and at least temporarily storing successive electronic images of only a non-sparse areal subset of the object, the successive electronic images including at least a reference electronic image and a current electronic image; a computer connected to receive electronic images from the area sensor for determining when movement has occurred between successive images of the object by correlation of the reference electronic image with the current electronic image; an interface operatively connected to the computer for producing control signals when movement has occurred between successive images; and a controller operatively connected to the interface and the first sensor to control operation of the first sensor using the control signals. - View Dependent Claims (28, 29, 30, 31, 32, 33, 34, 35)
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Specification