# US 10,455,203 B2 · Methods and apparatus for controlled shadow casting to increase the perceptual quality of projected content > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,455,203 B2 - Document ID: US10455203B2 - Status: Granted - Kind: B2 - Application number: 16/139,939 - Filed: 2018-09-24 - Published: 2019-01-24 - Granted: 2019-10-22 - Earliest claimed: 2017-06-30 - Assignees: Intel Corporation - Applicants: Intel Corporation - Inventors: Srenivas Varadarajan; Selvakumar Panneer; Carl S. Marshall - Web page: https://patentgrep.com/patent/US10455203B2 ## CPC - H04N 9/3155: {for controlling the light source (light source control per se H05B35/00 – H05B47/00; control of an illumination source for displays in general G09G3/3406)} - H04N 9/3141: {Constructional details thereof (details not peculiar to the presence of an electronic spatial light modulator G03B21/14)} - H04N 9/3147: {Multi-projection systems (video walls G06F3/1446)} - H04N 9/3185: {Geometric adjustment, e.g. keystone or convergence (optical or mechanical adjustment of convergence H04N9/317; using scanning means H04N3/22; optical or mechanical adjustments of projectors not peculiar to the presence of an electronic spatial light modulator G03B21/14)} - H04N 9/3194: {including sensor feedback} - H04N: PICTORIAL COMMUNICATION, e.g. TELEVISION ## Abstract Methods and apparatus for controlled shadow casting to increase the perceptual quality of projected content are disclosed. In some examples, an apparatus is to increase a perceptual quality of content projected onto a projection surface. In some examples, the apparatus includes a processor and memory. In some examples, the memory includes computer readable instructions. In some examples, the instructions, when executed, cause the processor to determine a target shutter position for a shutter based on a location of a light source and a location of a projection surface. In some examples, the instructions, when executed, further cause the processor to move the shutter to the target shutter position to cast a shadow onto the projection surface around a portion of content projected onto the projection surface. ## Claims ### Claim 1 An apparatus to increase a perceptual quality of content projected onto a projection surface, the apparatus comprising: a processor; and memory comprising computer readable instructions which, when executed, cause the processor to at least: determine a target shutter position for a shutter based on a location of a light source and a location of the projection surface; and move the shutter to the target shutter position to cast a shadow onto the projection surface around a portion of content projected onto the projection surface. ### Claim 2 (depends on 1) The apparatus as defined in claim 1, wherein the shutter is to be located between the location of the light source and the location of the projection surface in response to the moving of the shutter to the target shutter position. ### Claim 3 (depends on 1) The apparatus as defined in claim 1, wherein the shutter is to be moved to the target shutter position along a surface of a dome. ### Claim 4 (depends on 1) The apparatus as defined in claim 1, wherein the instructions, when executed, further cause the processor to: determine a target projection source position for a projection source based on a location of a projector and the location of the projection surface; and move the projection source to the target projection source position to project the content onto the projection surface. ### Claim 5 (depends on 4) The apparatus as defined in claim 4, wherein the projection source is to be directed toward the projection surface in response to the moving of the projection source to the target projection source position. ### Claim 6 (depends on 4) The apparatus as defined in claim 4, wherein the instructions, when executed, further cause the processor to identify the projection surface and the location of the projection surface. ### Claim 7 (depends on 6) The apparatus as defined in claim 6, wherein the instructions, when executed, further cause the processor to identify the projection surface from among a plurality of candidate projection surfaces based on the location of the projector. ### Claim 8 (depends on 7) The apparatus as defined in claim 7, wherein the candidate projection surfaces correspond to structural surfaces associated with a projection environment, the structural surfaces to be identified by an imaging engine based on image data associated with the projection environment. ### Claim 9 (depends on 8) The apparatus as defined in claim 8, wherein the instructions, when executed, cause the processor to identify the projection surface based further on a location of an audience associated with the projection environment, the location of the audience to be identified by the imaging engine based on the image data. ### Claim 10 (depends on 9) The apparatus as defined in claim 9, wherein the instructions, when executed, cause the processor to identify the projection surface based further on a pose of the audience, the pose of the audience to be identified by the imaging engine based on the image data. ### Claim 11 An apparatus to increase a perceptual quality of content projected onto a projection surface, the apparatus comprising: means for determining a target shutter position for a shutter based on a location of a light source and a location of the projection surface; and means for moving the shutter to the target shutter position to cast a shadow onto the projection surface around a portion of the content projected onto the projection surface. ### Claim 12 (depends on 11) The apparatus as defined in claim 11, wherein the shutter is to be located between the location of the light source and the location of the projection surface in response to the shutter being moved to the target shutter position by the means for moving the shutter. ### Claim 13 (depends on 11) The apparatus as defined in claim 11, wherein the means for moving the shutter is to move the shutter along a surface of a dome. ### Claim 14 (depends on 11) The apparatus as defined in claim 11, further including: means for determining a target projection source position for a projection source based on a location of a projector and the location of the projection surface; and means for moving the projection source to the target projection source position to project the content onto the projection surface. ### Claim 15 (depends on 14) The apparatus as defined in claim 14, wherein the projection source is to be directed toward the projection surface in response to the projection source being moved to the target projection source position by the means for moving the projection source. ### Claim 16 (depends on 14) The apparatus as defined in claim 14, further including means for identifying the projection surface and the location of the projection surface. ### Claim 17 (depends on 16) The apparatus as defined in claim 16, wherein the means for identifying the projection surface is to identify the projection surface from among a plurality of candidate projection surfaces based on the location of the projector. ### Claim 18 (depends on 17) The apparatus as defined in claim 17, wherein the candidate projection surfaces correspond to structural surfaces associated with a projection environment, the structural surfaces to be identified by an image processing means based on image data associated with the projection environment. ### Claim 19 (depends on 18) The apparatus as defined in claim 18, wherein the means for identifying the projection surface is to identify the projection surface based further on a location of an audience associated with the projection environment, the location of the audience to be identified by the imaging processing means based on the image data. ### Claim 20 (depends on 19) The apparatus as defined in claim 19, wherein the means for identifying the projection surface is to identify the projection surface based further on a pose of the audience, the pose of the audience to be identified by the imaging processing means based on the image data.