Methods and systems for analyzing the quality of digital signature confirmation images
AssigneeUnited States Postal Service
InventorRobert S. Zimmerman
Life of this patent
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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 for evaluating an imager includes generating an image that contains pixels of a first color and a second color. The image may be analyzed to determine information about particles of the first and second color. The particles may be described as contiguous pixels of the same color, and the particle information may relate to the size and quantity of the particles of each color. The method may further include determining if the image is unacceptable based on the particle information compared to predefined objective criteria.
Claims23
A method of evaluating two bi-chrome digital images generated by an imaging device, the method comprising:
- generating a first image, the first image having pixels of a first color and a second color;
- identifying, using a processor, a particle comprising contiguous pixels of the first color in the first image;
- determining, using a processor, first information relating to particle size and particle location of particles of the first color contained in the first image;
- generating a second image, the second image having pixels of the first color and the second color;
- identifying, using a processor, a particle comprising contiguous pixels of the first color in the second image;
- determining, using a processor, second information relating to particle size and particle location of particles of the first color contained in the second image;
- developing, using a processor and the first information, a first value corresponding to the area of the first image covered by particles of the first color;
- developing, using a processor and the second information, a second value corresponding to the area of the second image covered by particles of the first color;
- and
- determining, using a processor, if the second image is acceptable based on a predetermined objective criteria and the first and second values.
A non-transitory machine readable medium comprising instructions for evaluating two bi-chrome digital images, wherein the instructions cause a machine to:
- generate a first image, the first image having pixels of a first color and a second color;
- identify a particle comprising contiguous pixels of the first color in the first image;
- determine first information relating to particle size and particle location of particles of the first color contained in the first image;
- generate a second image, the second image having pixels of the first color and the second color;
- identify a particle comprising contiguous pixels of the first color in the second image;
- determine second information relating to particle size and particle location of particles of the first color contained in the second image;
- develop, using the first information, a first value corresponding to the area of the first image covered by particles of the first color;
- develop, using the second information, a second value corresponding to the area of the second image covered by particles of the first color;
- and
- determine if the second image is acceptable based on a predetermined objective criteria and the first and second values.
A system for evaluating two bi-chrome digital images generated by an imaging device, the method comprising:
- means for generating a first image, the first image having pixels of a first color and a second color;
- means for identifying a particle comprising contiguous pixels of the first color in the first image;
- means for determining first information relating to particle size and particle location of particles of the first color contained in the first image;
- means for generating a second image, the second image having pixels of the first color and the second color;
- means for identifying a particle comprising contiguous pixels of the first color in the second image;
- means for determining second information relating to particle size and particle location of particles of the first color contained in the second image;
- means for developing a first value corresponding to the area of the first image covered by particles of the first color;
- means for developing a second value corresponding to the area of the second image covered by particles of the first color;
- and
- means for determining if the second image is acceptable based on a predetermined objective criteria and the first and second values.
Dependencies are inferred from the claim text.