US 12,073,592 B2
Quantization apparatus, quantization method, and program
Xiaojun Wu, Musashino (JP); Masaki Kitahara, Musashino (JP); and Atsushi Shimizu, Musashino (JP)
Assigned to NIPPON TELEGRAPH AND TELEPHONE CORPORATION, Tokyo (JP)
Appl. No. 17/595,125
Filed by NIPPON TELEGRAPH AND TELEPHONE CORPORATION, Tokyo (JP)
PCT Filed May 23, 2019, PCT No. PCT/JP2019/020468
§ 371(c)(1), (2) Date Nov. 9, 2021,
PCT Pub. No. WO2020/235081, PCT Pub. Date Nov. 26, 2020.
Prior Publication US 2022/0222860 A1, Jul. 14, 2022
Int. Cl. G06K 9/36 (2006.01); G06T 3/40 (2006.01); G06T 9/00 (2006.01)
CPC G06T 9/00 (2013.01) [G06T 3/40 (2013.01)] 5 Claims
OG exemplary drawing
 
1. A quantization apparatus comprising:
a processor; and
a storage medium having computer program instructions stored thereon, when executed by the processor, perform to:
convert statistical data at a position in a real space into a pixel value of a coordinate, which is associated with the position, in an image;
derive a quantization parameter corresponding to a quantization width of the pixel value for each of one or more positions in the real space with respect to a part or a whole of the image;
quantize an error value that is a difference between the pixel value not quantized with the quantization width and the pixel value quantized with the quantization width;
detect a pixel in which an absolute value of the error value is equal to or less than an absolute value of the quantization width; and
quantize the error value of the detected pixel to 0.