US 12,170,795 B2
Image encoding method, image decoding method, image encoding apparatus, image decoding apparatus and program
Shiori Sugimoto, Musashino (JP); Seishi Takamura, Musashino (JP); Takayuki Kurozumi, Musashino (JP); and Hideaki Kimata, Musashino (JP)
Assigned to NIPPON TELEGRAPH AND TELEPHONE CORPORATION, Tokyo (JP)
Appl. No. 17/783,208
Filed by NIPPON TELEGRAPH AND TELEPHONE CORPORATION, Tokyo (JP)
PCT Filed Dec. 9, 2019, PCT No. PCT/JP2019/048034
§ 371(c)(1), (2) Date Jun. 7, 2022,
PCT Pub. No. WO2021/117082, PCT Pub. Date Jun. 17, 2021.
Prior Publication US 2023/0012229 A1, Jan. 12, 2023
Int. Cl. H04N 19/82 (2014.01); H04N 19/61 (2014.01); H04N 19/91 (2014.01)
CPC H04N 19/91 (2014.11) [H04N 19/61 (2014.11)] 7 Claims
OG exemplary drawing
 
1. An image coding method comprising:
an image acquisition step of acquiring a coding-target image;
a feature map generation step of generating a feature map, based on the image and an evaluation function, wherein the feature map has one or more fractals and each fractal has a fractal dimension and the fractal dimension includes a degree to which a feature fills available space, wherein the evaluation function is based on the fractal dimension and the fractal dimension is calculated for the coding-target image, such that the evaluation function is designed to have a greater loss result based on a code-target image having a lower fractality;
a contraction function generation step of performing fractal compression of the feature map and generating a contraction function; and
an entropy encoding step of performing entropy encoding of the contraction function.