Image analysis – Applications – Biomedical applications
Reexamination Certificate
2008-07-28
2010-10-26
Strege, John B (Department: 2624)
Image analysis
Applications
Biomedical applications
C382S260000
Reexamination Certificate
active
07822256
ABSTRACT:
A system for enhancing a digital image. The system includes: means for providing a digital image; means for decomposing the provided digital image into a multi-frequency band representation of four frequency bands as follows: a lowest frequency band image which represents large-sized features in the digital image; a low-to-mid frequency band image which represents mid-sized features of the digital image; a mid-to-high frequency band image which represents the small-sized features in the digital image; and a highest frequency band which represents very fine detail in the digital image; means for manipulating said low-to-mid frequency band image to produce a contrast effect without affecting the overall dynamic range of said digital image; means for multiplying each of said high-frequency band images with a gain factor; means for summing together said unmodified low frequency band image and said modified high-frequency band images to produce a reconstructed digital image; and means for mapping said reconstructed digital image through a tone-scale look-up table to map said reconstructed digital image to optical densities.
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Couwenhoven Mary E.
Senn Robert A.
Carestream Health Inc.
Strege John B
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