ALEXANDRIA, Va., Dec. 23 -- United States Patent no. 12,504,561, issued on Dec. 23, was assigned to NEC Corp. (Tokyo).
"Concealment method and concealment system" was invented by Yuki Ashino (Tokyo).
According to the abstract* released by the U.S. Patent & Trademark Office: "A concealment method includes: acquiring image data showing a background of an object; detecting a change in a component in a predetermined direction included in the image data; determining a pseudo direction of the image data on the basis of the result of the detection; and arranging, between the object and an observation position of the object, a first concealment body including a plurality of optical elements having a property of refracting light rays in a predeter...