Method for pre-focus of digital slides
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United States of America Patent
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Feb 22, 2011
Grant Date -
Feb 4, 2010
app pub date -
Apr 14, 2009
filing date -
May 3, 2000
priority date (Note) -
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Abstract
Methods and apparatus are provided for computing focus information prior to scanning digital microscope slides with a line scan camera. The methods include a point-focus procedure that works by moving the slide to the desired measurement location, moving the objective lens through a predefined set of height values, acquiring imagery data at each height, and determining the height of maximum contrast. The methods also include a ribbon-focus procedure whereby imagery data are acquired continuously, while the slide and objective lens are in motion. Both methods may be applied with either a static or a dynamic implementation.
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