Patent
Conversion of an image represented by a field of pixels in a gray scale to a field of pixels in binary scale
TLDR
In this paper, a gray scale image of a fingerprint composed of a field of pixels is converted to a binary image composed of pixels by a technique which takes into account the directivity of ridge and valley structure.Abstract:
A gray scale image of a fingerprint composed of a field of
pixels is converted to a binary image composed of a field of
pixels by a technique which takes into account the directivity of
the ridge and valley structure. Three intermediate binary im
ages are developed, one by the use of a vertical filter, one by
the use of a horizontal filter and a reference image by the use of
a filter which is not directionally biased. Corresponding sub
fields around each pixel in each of the three images are com
pared. If the subfield for the vertically derived image is closer to
that of the reference image then is the subfield for the horizon
tally derived image, then the binary value for the pixel from the
vertically derived image is used in the final image; and vice
versa. In this fashion, a fourth a final binary image is derived
from a combination of the vertically derived image and horizon
tally derived image which includes the best imagery from each
of those two intermediate images.read more
Citations
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Patent
Adaptive pattern recognition based control system and method
TL;DR: An adaptive interface for a programmable system, for predicting a desired user function, based on user history, as well as machine internal status and context, is presented for confirmation by the user, and the predictive mechanism is updated based on this feedback as mentioned in this paper.
Patent
Internet appliance system and method
TL;DR: In this paper, an Internet appliance, comprising, within a single housing, packet data network interfaces, adapted for communicating with the Internet and a local area network, at least one data interface selected from the group consisting of a universal serial bus, an IEEE-1394 interface, a voice telephony interface, an audio program interface, video program interfaces, an audiovisual program interface and a camera interface.
Patent
Fingerprint recognition system
Vance C. Bjorn,Serge Belongie +1 more
TL;DR: A method and apparatus for fingerprint recognition is described in this article, where a fingerprint is detected on a sensor and digitized, and a digitized background is subtracted from the fingerprint, resulting in a difference print.
Patent
Method and apparatus for verifying identity using image correlation
TL;DR: In this paper, a method and apparatus for verification of personnel identity by correlation of fingerprint images was proposed, which includes the steps of: first enrolling a person by the stages of forming a reference image of a fingerprint of the person, identifying a plurality of reference sections within the reference image, where the image data contained in each of the reference sections is distinct relative to the image images adjacent to and surrounding the reference section, and saving the image datasets of each of these reference sections, and then verifying the identity of someone claiming to be an enrolled person.
Patent
Method and apparatus for halftone rendering of a gray scale image using a blue noise mask
Kevin J. Parker,Theophano Mitsa +1 more
TL;DR: In this paper, a method for rendering a halftone image of a gray scale image by utilizing a pixel-by-pixel comparison of the grey scale image against a blue noise mask is disclosed.
References
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Patent
Picture signal coding apparatus
TL;DR: In this paper, a frame of a gray-scaled picture is divided into blocks, in each of which the mean luminance of picture elements is used as a threshold value for comparison with each picture element signal to classify it into 0 or 1 according to its magnitude to provide a resolution component.
Patent
Pattern preliminary processing system
TL;DR: In this article, a pattern preliminary processing system is proposed, where high and low frequency noise other than the pattern signal from a pick-up tube are eliminated by a filtering circuit, and the thus obtained pattern signal is tri-valued into signals of high, medium and low levels by means of a processing circuit having two different threshold values, and then the signal of the medium level is converted into a signal of high or low level with reference to peripheral information.
Patent
Electronic character-reading system
TL;DR: In this paper, a set of photoelectric transducers, optically scanning a line transverse to the direction of movement of a character-bearing document to be electronically read, is periodically actuated to pick up light from a multiplicity of elemental areas of that document and to generate electrical analog voltages commensurate with the brightness of these areas.
Patent
Image processing architecture
TL;DR: In this article, a sliding submatrix window of signals located within a larger image matrix is described, and associated circuitry combines the uncentered moment signals to produce centered moment signals.
Patent
Method of restoring a picture through estimation
TL;DR: In a picture restoring method, an original picture is divided into picture elements arranged in matrix form, the picture elements are grouped into picture element regions each of which has an arrangement of nxn picture elements, and each picture element region is divided by a minute picture element having an arrangement 1.5n×1.5 n minute picture elements.