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Image processing apparatus, camera module, and image processing method

  • US 8,587,701 B2
  • Filed: 03/16/2011
  • Issued: 11/19/2013
  • Est. Priority Date: 07/22/2010
  • Status: Expired due to Fees
First Claim
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1. An image processing apparatus comprising:

  • a defect determining unit determining whether a target pixel is a defect or not, on the basis of a pixel value of the target pixel and pixel values of a plurality of adjacent pixels which are pixels for the same color as that of the target pixel and are located around the target pixel;

    a selection unit selecting a pixel value to be assigned to the target pixel according to the determination result from the defect determining unit; and

    a signal-to-noise ratio (SNR) estimating unit estimating an SNR of an image signal,wherein the defect determining unit performs defect determination according to the level of the SNR estimated by the SNR estimating unit,wherein when the defect determining unit determines that the target pixel is a defect, the selection unit outputs the pixel value according to the level of the SNR,wherein region setting is performed such that the level of the SNR is divided into a plurality of regions,wherein the SNR estimating unit outputs a mode switch signal representing a region including the estimated SNR, andwherein, according to the mode switch signal representing that the SNR is included in a lowest SNR region of the plurality of regions, the defect determining unit replaces a pixel value of a pixel with the maximum pixel value and a pixel value of a pixel with the minimum pixel value, with a pixel value of another pixel of the adjacent pixels.

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