Image processing apparatus and imaging apparatus with noise correction function and signal level correction function
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United States of America Patent
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May 31, 2016
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Dec 25, 2014
app pub date -
Jun 18, 2014
filing date -
Jun 19, 2013
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Abstract
An image signal processing apparatus includes an image signal input unit, a local information acquisition unit for calculating a statistical quantity of pixel values in a local area including a noted pixel from an image signal as local information, a noise correction unit for conducting noise correction on the image signal by using the local information and outputting a noise-corrected image signal, an image signal correction unit for conducting signal level correction on the image signal from the noise correction unit and outputting a level-corrected image signal, an image signal correction intensity control unit for determining correction intensity in the level correction and changing input-output characteristics in the level correction, a signal correction characteristic estimation unit for estimating level correction characteristics based on the correction intensity, and a noise correction intensity control unit for controlling correction intensity in the noise correction in conjunction with the level correction characteristics.
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