US 11,889,070 B2
Image filtering apparatus, image decoding apparatus, and image coding apparatus
Tomohiro Ikai, Sakai (JP); Norio Itoh, Sakai (JP); Takeshi Chujoh, Sakai (JP); Yasuaki Tokumo, Sakai (JP); and Hiroshi Watanabe, Tokyo (JP)
Assigned to SHARP KABUSHIKI KAISHA, Sakai (JP)
Appl. No. 17/040,404
Filed by SHARP KABUSHIKI KAISHA, Sakai (JP)
PCT Filed Mar. 25, 2019, PCT No. PCT/JP2019/012589
§ 371(c)(1), (2) Date Sep. 22, 2020,
PCT Pub. No. WO2019/182159, PCT Pub. Date Sep. 26, 2019.
Claims priority of application No. 2018-057181 (JP), filed on Mar. 23, 2018.
Prior Publication US 2021/0021820 A1, Jan. 21, 2021
Int. Cl. H04N 19/117 (2014.01); H04N 19/124 (2014.01); H04N 19/82 (2014.01); H04N 19/159 (2014.01); G06N 3/08 (2023.01)
CPC H04N 19/117 (2014.11) [G06N 3/08 (2013.01); H04N 19/124 (2014.11); H04N 19/159 (2014.11); H04N 19/82 (2014.11)] 5 Claims
OG exemplary drawing
 
1. An image filtering apparatus for filtering an input image, the image filtering apparatus comprising:
a loop filter that includes (i) at least a first neural network filter and a second neural network filter, and (ii) an adaptive loop filter,
wherein:
the first neural network filter receives (i) the input image and (ii) an image of a quantization parameter which is defined by an array of two dimensions, and outputs a first output image,
the second neural network filter receives the input image or the first output image, and outputs a second output image, and
the adaptive loop filter receives (i) the input image, (ii) the first output image, and (iii) the second output image, and outputs a filtered image, as a third output image.