Image acquiring apparatus and image acquiring method for detecting and recognizing size of scan target without using sensors
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United States of America Patent
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Jul 24, 2012
Grant Date -
Jun 11, 2009
app pub date -
Apr 28, 2008
filing date -
Dec 6, 2007
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An image acquiring apparatus and image acquiring method are provided. The image acquiring apparatus includes an image sensor for outputting a plurality of first analog image signals corresponding to a plurality of pixels; an ADC for converting the plurality of first analog image signals to a plurality of digital image signals; a DAC for converting the plurality of digital image signals to a plurality of second analog image signals, wherein each of which has an actual voltage value; a comparing unit for respectively comparing the actual voltage values of the plurality of second analog image signals with a reference voltage value so as to generate a plurality of corresponding comparing results; a counting unit for adjusting a counting value according to each of the comparing results; and a control unit for determining whether to stop a scanning operation of the image acquiring apparatus or not according to the counting value.
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