摘要:
An image is obtained of an identifying object that is on a printed document. A forensic signature is extracted from the image. Access to the extracted forensic signature profile is enabled via information encoded in the identifying object. The identifying object may be interpreted to access the forensic signature for comparison with another.
摘要:
A method of authenticating the identity of an item bearing or associated with a printed security marker, the method comprising: a. printing the security marker with a pattern that encodes at least one of a unique product identifier, a batch identifier, and positional information about a portion of the marker; b. scanning and storing an image of the security marker as printed, said image being taken at sufficiently high resolution to capture artefacts of the printing process; and authentication steps comprising: c. imaging a portion of the marker at sufficiently high resolution to capture the artefacts, and d. querying a data store by providing the image of the portion of the marker or a compressed or parameterised version of the image and data derived from the pattern.
摘要:
An image is obtained of an identifying object that is on a printed document. A forensic signature is extracted from the image. Access to the extracted forensic signature profile is enabled via information encoded in the identifying object. The identifying object may be interpreted to access the forensic signature for comparison with another.
摘要:
A method of authenticating the identity of an item bearing or associated with a printed security marker, the method comprising: a. printing the security marker with a pattern that encodes at least one of a unique product identifier, a batch identifier, and positional information about a portion of the marker; b. scanning and storing an image of the security marker as printed, said image being taken at sufficiently high resolution to capture artifacts of the printing process; and authentication steps comprising: c. imaging a portion of the marker at sufficiently high resolution to capture the artifacts, and d. querying a data store by providing the image of the portion of the marker or a compressed or parameterized version of the image and data derived from the pattern.
摘要:
A forensic authentication system includes an imaging device to capture an image of a printed mark and a non-printed area of a substrate directly adjacent to the printed mark, and a processor to run computer readable instructions. The processor can run computer readable instructions to utilize a model to define a substrate region that corresponds with at least a portion of the non-printed area of the substrate directly adjacent to the printed mark; and computer readable instructions to generate a substrate signature for the defined substrate region. Each of the computer readable instructions is embedded on a non-transitory, tangible computer readable medium.
摘要:
A forensic authentication system includes an imaging device to capture an image of a printed mark and a non-printed area of a substrate directly adjacent to the printed mark, and a processor to run computer readable instructions. The processor can run computer readable instructions to utilize a model to define a substrate region that corresponds with at least a portion of the non-printed area of the substrate directly adjacent to the printed mark; and computer readable instructions to generate a substrate signature for the defined substrate region. Each of the computer readable instructions is embedded on a non-transitory, tangible computer readable medium.
摘要:
First, second, and third image planes are obtained from at least one image sensor. The first image plane is formed from light of a first spectral distribution. The second image plane is formed from light of a second spectral distribution. The third image plane is formed from light of a spectral distribution which substantially covers the visible spectrum. First spatial frequency components are generated from the first, second and third image planes. A second spatial frequency component is generated from the third image plane. A color transform is applied to the first spatial frequency components from the first, second, and third image planes to obtain at least first, second and third transformed first spatial frequency image planes. The at least first, second and third transformed first spatial frequency image planes are combined with the second spatial frequency component from the third image plane to form an image.
摘要:
A method for selecting a focus setting for a digital image acquisition appliance, the method comprising: acquiring at least two images, the images being acquired with different focus settings; calculating a figure-of-merit for each of the images; calculate a normalization constant using the figure-of-merit calculated for each of the images; calculating a normalized figure-of-merit for each of the images by dividing the figure-of-merit of each image by the normalization constant; selecting the focus setting using the normalized figure-of-merit for each of the images and a predetermined selection criteria.
摘要:
Provided is an image processing method comprising: obtaining first, second and third image planes from at least one image sensor, the first image plane formed from light of a first spectral distribution, the second image plane formed from light of a second spectral distribution and the third image plane formed from light of a spectral distribution which substantially covers the visible spectrum; generating first spatial frequency components from the first, second and third image planes; generating a second spatial frequency component from the third image plane; applying a color transform to the first spatial frequency components from the first, second and third image planes to obtain at least first, second and third transformed first spatial frequency image planes; combining the at least first, second and third transformed first spatial frequency image planes with the second spatial frequency component from the third image plane to form an image.
摘要:
Disclosed are digital imaging devices that embody a method or algorithm for transitioning from a displayable focus process to a high speed focus process which can be displayed, and wherein the transition is accomplished in a seamless fashion. In addition, the digital imaging devices may embody a method for quickly verifying the focus quality of the image. If the focus quality is acceptable, the device indicates that focus is good and avoids a long auto-focus time.