초록 ▼

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 ve

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.

대표청구항 ▼

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 acqu

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.