US 12,260,568 B2
Optimal automatic mapping method of real image and thermal image in a body heat tester and body heat tester applying method thereof
Jung Hoon Lee, Wonju-si (KR); Joo Sung Lee, Wonju-si (KR); and Hyun Chul Ko, Wonju-si (KR)
Assigned to MESH CO., LTD., Wonju-si (KR)
Filed by MESH CO., LTD., Wonju-si (KR)
Filed on Nov. 23, 2021, as Appl. No. 17/534,241.
Claims priority of application No. 10-2020-0162528 (KR), filed on Nov. 27, 2020.
Prior Publication US 2022/0172381 A1, Jun. 2, 2022
Int. Cl. G06T 7/30 (2017.01); G06T 7/11 (2017.01); G06T 7/13 (2017.01); G06V 10/25 (2022.01)
CPC G06T 7/30 (2017.01) [G06T 7/11 (2017.01); G06T 7/13 (2017.01); G06V 10/25 (2022.01); G06T 2207/10048 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A body heat tester comprising:
a thermal imaging camera for taking thermal images of an area with a plurality of subjects;
a real imaging camera for taking real images of an area with a plurality of subjects at a same time as the thermal camera; and
a data processing unit that performs operations, comprising:
matching thermal and real images received from the thermal imaging camera and the real imaging camera,
obtaining reconstructed real images matched with the thermal images by stretching or shortening a top, bottom, left, and right of the real images based on the thermal images, and
detecting a body heat of subjects using the thermal images and the reconstructed real images;
wherein the data processing unit further comprises a real and thermal image mapping unit configured to:
store real image frames each at a time before and after of thermal image frames in a memory unit;
select a real image frame having a maximum matching rate with a thermal image among the stored real image frames;
detect boundaries of a subject in a thermal image frame and the selected real image frame; and
match the thermal image frame with results of expanding or stretching and reducing or shortening the selected real image frame by 1 pixel in each direction of top, bottom, left and right to select a point in the real image frame with the maximum matching rate.