Imaging apparatus and method
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United States of America Patent
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Aug 27, 2013
Grant Date -
Jun 21, 2012
app pub date -
Dec 20, 2011
filing date -
Dec 21, 2010
priority date (Note) -
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Abstract
An imaging apparatus that adjusts focus based on frequency components extracted from an image signal is provided. The apparatus includes a 1st order Infinite Impulse Response (IIR)-filter including a plurality of sample delayers having a plurality of line buffers for buffering and delaying a plurality of samples to sequentially read pixels of the image signal through raster scanning and extracting frequency components of the image signal from the read pixels by using the plurality of sample delayers; and a delay sample number controller for controlling the IIR-filter to match the number of horizontal pixels sequentially read from the image signal through raster scanning to the number of the plurality of samples buffered by the plurality of line buffers.
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