Title:
IMAGE PROCESSING DEVICE, IMAGE PROCESSING METHOD, AND PROGRAM
Document Type and Number:
WIPO Patent Application WO/2017/203941
Kind Code:
A1
Abstract:
Provided are a device and method for reducing the banding phenomenon in subsampled images, and that achieve high picture quality. A subsampled image to which an adjoining pixel value is copied at the subsampling position of the pixel value is made to serve as an input image, and global gain for the signal to be corrected, which is the ratio of the inclination of the signal to be corrected for the global area comprising a plurality of consecutive pixels including the pixel position of the pixel to be corrected in the input image to the inclination of the brightness signal, is calculated, local inclination of brightness, which is the inclination of the brightness signal of a local area smaller than the global area, which is within the global area and includes the pixel position of the pixel to be corrected of the input image, is calculated, local inclination of brightness is multiplied by the global gain of the signal to be corrected, and the multiplication results are applied to calculate the corrected pixel value for the pixel to be corrected. For example, the signal pixel value subject to correction on the edge of the local area is added to the multiplied value to calculate the corrected pixel value.
Inventors:
ETO HIROAKI (JP)
Application Number:
PCT/JP2017/017114
Publication Date:
November 30, 2017
Filing Date:
May 01, 2017
Export Citation:
Assignee:
SONY CORP (JP)
International Classes:
H04N11/20; H04N9/77
Foreign References:
| JP2014033357A | 2014-02-20 | |||
| JP2008182627A | 2008-08-07 | |||
| JP2005039679A | 2005-02-10 |
Attorney, Agent or Firm:
MIYATA, Masaaki et al. (JP)
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