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Image processing apparatus, image device, image processing method, and program for reducing noise or false colors in an image

  • US 10,200,664 B2
  • Filed: 05/17/2017
  • Issued: 02/05/2019
  • Est. Priority Date: 03/27/2012
  • Status: Active Grant
First Claim
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1. An image processing apparatus comprising:

  • an image sensor that has an RGBW array including R, G and B pixels which are light receiving elements corresponding to wavelength lights of each RGB color and a W pixel which is a light receiving element receiving substantially all RGB wavelength light; and

    an image processor comprising a processing device and a memory storing instructions that, when executed by the processing device, perform image processing by inputting a sensor image formed of an RGBW pixel signal output from the image sensor,wherein the image sensor has a periodic array of a unit composition formed of each RGBW pixel,wherein the image processor converts a pixel array of the sensor image formed of the RGBW pixel signal, and performs array conversion processing for generating an RGB array image formed of a Bayer array,wherein the image processor has an array converter which generates the RGB array image formed of the Bayer array, andwherein the array converter has a W pixel interpolator which generates a whole W pixel image signal by setting the W pixel at an RGB pixel position of the sensor image;

    an RGBW pixel generator which generates an RGBW corresponding low frequency signal which is a low frequency signal of each RGBW pixel signal at each pixel position of the sensor image; and

    a correlation processor which inputs the whole W pixel image signal and the RGBW corresponding low frequency signal, and which performs array conversion for a composition pixel of the sensor image and generates an RGB image of the Bayer array by calculating a pixel value based on an estimation in which the W pixel and the R, G and B pixels have a positive correlation.

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