Methods and systems for analyzing the quality of digital signature confirmation images
AssigneeUnited States Postal Service
InventorRobert S. Zimmerman
Life of this patent
Estimating the term…
Abstract
Methods and systems for evaluating an imager that produces bi-chrome images from a scanner or a digital imaging device, the bi-chrome images having pixels of a first and second color. In one embodiment, a method includes generating an image with a hand-held imaging device, the image having pixels of a first color and a second color, analyzing the image to determine information about particles of the first and second color contained in the image, each particle comprising contiguous pixels of the same color, the particle information comprising information on first and second color particle size and count, and determining if the image is unacceptable based on predetermined objective criteria and the particle information.
Claims29
A method of evaluating a bi-chrome digital image generated by an imaging device, the method comprising:
- generating an image with a hand-held imaging device, the image having pixels of a first color and a second color;
- dividing the image into a first area corresponding to a first portion of the image and a second area corresponding to a portion of the first portion of the image;
- determining information on the particle size and the particle location of particles of the first color contained in the image;
- each particle comprising contiguous pixels of the first color;
- developing a first value corresponding to the percentage of the first area covered by particles of the first color;
- developing a second value corresponding to the percentage of the second area covered by particles of the first color;
- and
- determining if the image is unacceptable based on predetermined objective criteria and the first and second values.
A non-transitory machine readable medium comprising instructions for evaluating a bi-chrome image produced by an imager, the bi-chrome image having pixels of a first and second color, wherein the instructions upon execution cause a machine to:
- generate an image with an imaging device, the image having pixels of a first color and a second color;
- divide the image into a first area corresponding to a first portion of the image and a second area corresponding to a portion of the first portion of the image;
- determine information about the particles contained in the image, each particle comprising continguous pixels of the same color, the particle information comprising information on the particle size and the particle location of particles of the first color contained in the first area;
- develop a first value corresponding to the percentage of the first area covered by particles of the first color;
- develop a second value corresponding to the percentage of the second area covered by particles of the first color;
- and
- determine if the image is unacceptable based on predetermined objective criteria and the first and second values.
A system for generating and evaluating bi-chrome digital images, comprising:
- an imaging device configured to capture a digital bi-chrome image, the image having particles of a first color and particles of a second color, each particle comprising contiguous pixels of the same color,
- a processor configured to:
- divide the image into a first area corresponding to a first portion of the entire image and a second area corresponding to a portion of the first portion of the image,
- analyze at least a portion of the bi-chrome image and determine information about the particles contained in the image, the particle information comprising information on the particle size and the particle location of particles of the first color contained in the image;
- information about the particles of the first and second color,
- develop a first value corresponding to the percentage of the first area covered by particles of the first color and to develop a second value corresponding to the percentage of the second area covered by particles of the first color, and
- determine if the image is unacceptable based on predetermined objective criteria and the first and second values.
Dependencies are inferred from the claim text.