Help kill bad patent application "Image Processing Apparatus And Image Processing Method" by providing evidence of prior art.
Publication number US20130128027 A1 Publication type Application Application number US 13/653,469 Publication date May 23, 2013 Filing date Oct 17, 2012 Priority date Nov 18, 2011 Also published as CN103124358A, EP2595375A1 Inventors Masaaki Katsurada, Keisuke Nagoshi Original Assignee Keyence Corporation
CLAIM 1. An image processing apparatus, comprising: an imaging unit having
an imaging element for imaging an inspection object; and
an image processing unit for executing image processing on image data captured by the imaging unit, wherein the imaging unit converts a color image imaged by the imaging element to an HDR image based on a conversion characteristic for expanding a dynamic range, to output the HDR image, and
the image processing unit includes
an inverse conversion portion for inversely converting color component values with respect to each pixel of the HDR image, outputted from the imaging unit, based on the conversion characteristic,
a calculation portion for calculating brightness and a ratio of the color component values with respect to each pixel, from the inversely converted color component values, and
a post-correction HDR image generating portion for converting the calculated brightness based on the conversion characteristic, to generate a post-correction HDR image based on a ratio of the converted brightness and the calculated color component values.