US 12,456,189 B2
Composition-guided post processing for x-ray images
Adam Ratcliffe, Stockton-on-Tees (GB); Richard Mcwilliam, Stockton-on-Tees (GB); and Chris Egan, Stockton-on-Tees (GB)
Assigned to IBEX INNOVATIONS LTD, Stockton-on-Tees (GB)
Appl. No. 17/782,863
Filed by IBEX INNOVATIONS LTD, Stockton-on-Tees (GB)
PCT Filed Dec. 4, 2020, PCT No. PCT/GB2020/053133
§ 371(c)(1), (2) Date Jun. 6, 2022,
PCT Pub. No. WO2021/111152, PCT Pub. Date Jun. 10, 2021.
Claims priority of application No. 1917920 (GB), filed on Dec. 6, 2019; and application No. 2007725 (GB), filed on May 22, 2020.
Prior Publication US 2023/0007835 A1, Jan. 12, 2023
Int. Cl. G06T 7/00 (2017.01); G06T 5/50 (2006.01)
CPC G06T 7/0012 (2013.01) [G06T 5/50 (2013.01); G06T 2207/10116 (2013.01); G06T 2207/20221 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A method of enhancing an x-ray image comprising:
receiving an input image, wherein the input image is an x-ray image of an object and comprises a plurality of image pixel values;
receiving a model of the object comprising:
a thickness data set comprising thickness values specifying respective thicknesses of portions of the object corresponding to respective locations of an image plane of the input image, and
a composition data set comprising composition values specifying respective material compositions of portions of the object corresponding to respective locations of the image plane, wherein the composition data set is defined at a first resolution;
deriving, based on image pixel values of the input image, the thickness data set and the composition data set, a mapping which maps an image pixel value and a corresponding thickness value specified for a given location in the image plane to a corresponding composition value for the location;
using the derived mapping to determine a second composition data set comprising composition values at a second resolution, wherein the second resolution is higher than the first resolution; and
determining image pixel values for pixels of an output image at the second resolution based on the second composition data set.