# US 10,311,273 B2 · Thermal tags for real-time activity monitoring and methods for detecting the same > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,311,273 B2 - Document ID: US10311273B2 - Status: Granted - Kind: B2 - Application number: 15/296,090 - Filed: 2016-10-18 - Published: 2018-04-19 - Granted: 2019-06-04 - Earliest claimed: 2016-10-18 - Assignees: International Business Machines Corporation - Applicants: International Business Machines Corporation - Inventors: Li-Wen Hung; Jui-Hsin Lai - Web page: https://patentgrep.com/patent/US10311273B2 ## CPC - G06K 7/1413: {1D bar codes} - G06K 7/1417: {2D bar codes} - G06K 19/06037: {multi-dimensional coding} - G06K 19/06112: {the marking being simulated using a light source, e.g. a barcode shown on a display or a laser beam with time-varying intensity profile} - G06K 19/0614: {the marking being selective to wavelength, e.g. color barcode or barcodes only visible under UV or IR (methods or arrangements for sensing record carriers using a selected wavelength, see G06K7/12)} - G06K 19/0615: {the marking being of the rewritable type, e.g. thermo-chromic barcodes} - G06K: GRAPHICAL DATA READING (image or video recognition or understanding G06V); PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS ## Abstract A thermal tag includes a power source to generate current along a resistive path and a plurality of infrared-emitting features positioned along the resistive path to emit infrared light along an infrared-emitting pattern, wherein the plurality of infrared-emitting features include one or more infrared-emitting stripes on a first surface of the thermal tag defining a pattern region and a plurality of infrared-emitting dots within a portion of the pattern region to provide a thermal-diffusion resistant pattern for activity monitoring. ## Claims ### Claim 1 A thermal tag, comprising: a power source to generate current along a resistive path; and a plurality of infrared-emitting features positioned along the resistive path to emit infrared light along an infrared-emitting pattern, wherein the plurality of infrared-emitting features include one or more infrared-emitting stripes on a first surface of the thermal tag defining a pattern region and a plurality of infrared-emitting dots within a portion of the pattern region to provide a thermal-diffusion resistant pattern for activity monitoring. ### Claim 2 (depends on 1) The thermal tag of claim 1, wherein the one or more infrared-emitting stripes include at least two stripes orthogonal to each other. ### Claim 3 (depends on 2) The thermal tag of claim 2, wherein each of the at least two stripes are connected at a distal portion of each stripe. ### Claim 4 (depends on 1) The thermal tag of claim 1, wherein the one or more infrared-emitting stripes are indicative of at least one factor associated with the thermal tag, the at least one factor being selected from the group consisting of a distance of the thermal tag to a thermal sensor and an orientation of the thermal tag within an environment. ### Claim 5 (depends on 1) The thermal tag of claim 1, wherein each of the one or more infrared-emitting stripes comprises a predetermined length. ### Claim 6 (depends on 1) The thermal tag of claim 1, wherein: the pattern region includes a plurality of quantized sections, each quantized section being associated with a column and a row of a matrix configuration; and each of the plurality of infrared-emitting dots is positioned within one quantized section of the pattern region forming a matrix configuration. ### Claim 7 (depends on 6) The thermal tag of claim 6, wherein the matrix configuration is indicative of at least one factor associated with the thermal tag, the at least one factor being identification information associated with the thermal tag. ### Claim 8 (depends on 6) The thermal tag of claim 6, wherein the matrix configuration corresponds to a binary code identifying a tagged object attached to the thermal tag. ### Claim 9 (depends on 6) The thermal tag of claim 6, wherein each of the plurality of infrared-emitting dots is separated from an adjacent dot by a non-infrared-emitting gap. ### Claim 10 A method for activity monitoring, comprising: capturing an infrared image of an environment that comprises at least one patient being monitored and at least one infrared-emitting tag; detecting a plurality of infrared-emitting features arranged in an infrared-emitting pattern on the at least one infrared-emitting tag, wherein the plurality of infrared-emitting features include one or more infrared-emitting stripes on a first surface of the at least one infrared-emitting tag defining a pattern region and a plurality of infrared-emitting dots within a portion of the pattern region to provide a thermal-diffusion resistant pattern; and tracking a relationship between the patient being monitored and the at least one infrared-emitting tag using a processor. ### Claim 11 (depends on 10) The method of claim 10, wherein detecting the plurality of infrared-emitting features includes applying a Hough Line Transform. ### Claim 12 (depends on 10) The method of claim 10, wherein detecting the plurality of infrared-emitting features includes quantizing the pattern region into quantized sections and detecting at least one infrared-emitting dot within at least one quantized section. ### Claim 13 (depends on 10) The method of claim 10, further comprising determining at least one factor associated with the at least one infrared-emitting tag. ### Claim 14 (depends on 13) The method of claim 13, wherein determining the at least one factor includes detecting an observed length of the one or more infrared-emitting stripes and comparing the observed length with a predetermined length of the one or more infrared-emitting stripes to determine a distance of the at least one-infrared emitting tag to a thermal sensor. ### Claim 15 (depends on 13) The method of claim 13, wherein determining the at least one factor includes detecting an observed position of the one or more infrared-emitting stripes and comparing the observed position with a predetermined position of the one or more infrared-emitting stripes to determine an orientation of the at least one-infrared emitting tag within an environment. ### Claim 16 (depends on 13) The method of claim 13, wherein determining the at least one factor includes detecting a position within the pattern region of each of the plurality of infrared-emitting dots and comparing the position with a predetermine dot layout to determine identification information associated with the at least one infrared-emitting tag. ### Claim 17 A non-transitory computer readable storage medium comprising a computer readable program for activity monitoring, wherein the computer readable program, when executed on a computer, causes the computer to execute: capturing an infrared image of an environment that comprises at least one patient being monitored and at least one infrared-emitting tag; detecting a plurality of infrared-emitting features arranged in an infrared-emitting pattern on the at least one infrared-emitting tag, wherein the plurality of infrared-emitting features include one or more infrared-emitting stripes on a first surface of the at least one infrared-emitting tag defining a pattern region and a plurality of infrared-emitting dots within a portion of the pattern region to provide a thermal-diffusion resistant pattern; and tracking a relationship between the patient being monitored and the at least one infrared-emitting tag using a processor. ### Claim 18 (depends on 17) The non-transitory computer readable storage medium of claim 17, further comprising determining at least one factor associated with the at least one infrared-emitting tag. ### Claim 19 (depends on 18) The non-transitory computer readable storage medium of claim 18, wherein determining the at least one factor includes detecting an observed length of the one or more infrared-emitting stripes and comparing the observed length with a predetermined length of the one or more infrared-emitting stripes to determine a distance of the at least one-infrared emitting tag to a thermal sensor. ### Claim 20 (depends on 18) The non-transitory computer readable storage medium of claim 18, wherein determining the at least one factor includes detecting an observed position of the one or more infrared-emitting stripes and comparing the observed position with a predetermined position of the one or more infrared-emitting stripes to determine an orientation of the at least one-infrared emitting tag within an environment.