# US 11,029,210 B2 · Process for the approach to an oriented relative position between a camera or scanning device and a dental assistance element > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,029,210 B2 - Document ID: US11029210B2 - Status: Granted - Kind: B2 - Application number: 16/469,986 - Filed: 2017-12-22 - Published: 2020-03-19 - Granted: 2021-06-08 - Earliest claimed: 2016-12-22 - Assignees: Ivoclar Vivadent AG - Applicants: Ivoclar Vivadent AG - Inventors: Manuel Schlegel; Markus Pauler - Web page: https://patentgrep.com/patent/US11029210B2 ## CPC - A61C 19/10: Supports for artificial teeth for transport or for comparison of the colour - G01J 3/508: {measuring the colour of teeth} - G06T 7/74: {involving reference images or patches} - H04N 23/633: {for displaying additional information relating to control or operation of the camera} - H04N 23/635: {Region indicators; Field of view indicators} - A61C 9/0053: {Optical means or methods, e.g. scanning the teeth by a laser or light beam} - G06T 2207/10024: Color image - G06T 2207/30036: Dental; Teeth - G06T 2207/30204: Marker - G06T 2207/30244: Camera pose - A61C: DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE (non-driven toothbrushes A46B; {tongue scrapers A61B17/24;} preparations for dentistry A61K6/00; preparations for cleaning the teeth or mouth A61K8/00, A61Q11/00) - G01J: MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY (light sources F21, H01J, H01K, H05B; investigating properties of materials by optical means G01N) - G06T: IMAGE DATA PROCESSING OR GENERATION, IN GENERAL - H04N: PICTORIAL COMMUNICATION, e.g. TELEVISION ## Abstract The invention concerns a process for the approach to an oriented relative position between a camera or scanning device and a dental assistance element (10), in particular via an app on a smartphone, for recording the dental assistance element (10), such as a miniature shade guide (10). A mark (4) is attached to the dental assistance element (10), and/or at least one part of the dental assistance element (10) is used as a mark (4). A stencil (6) which is congruent with or mathematically similar to the mark (4) is displayed on a display device of the camera or scanning device. For the approach to the oriented relative position between the camera or scanning device and the dental assistance element, a modification of the degree of coverage of the stencil (6) with the mark (4) or the one part of the dental assistance element (10) is detected. ## Claims ### Claim 1 Process for an approach to an oriented relative position between a camera or scanning device and a dental assistance element (10) for recording the dental assistance element (10) comprising wherein the dental assistance element (10) comprises a miniature shade guide, wherein there is a mark (4) attached to the dental assistance element (10), and/or wherein at least one part of the dental assistance element (10) is used as a mark (4), wherein a stencil (6) which is congruent with or mathematically similar to the mark (4) is displayed on a display device of the camera or scanning device, and wherein for the approach to the oriented relative position between the camera or scanning device and the dental assistance element, a modification of a degree of coverage of the stencil (6) with the mark (4) or the at least one part of the dental assistance element (10) is detected. ### Claim 2 (depends on 1) Process according to claim 1, wherein the mark (4) is provided with at least one asymmetry. ### Claim 3 (depends on 1) Process according to claim 1, wherein for the approach to the oriented relative position between the camera or scanning device and the dental assistance element, the stencil (6) is brought to coverage or is brought substantially to coverage with the mark (4) or the at least one part of the dental assistance element (10), or the mark (4) or at least one part of the dental assistance element (10) and the stencil (6) are aligned with each other. ### Claim 4 (depends on 3) Process according to claim 3, wherein the congruence or coverage between the stencil (6) and the mark (4) or the at least one part of the dental assistance element (10) is signalled by an optical, acoustic, or mechanic display (16), or by triggering the camera. ### Claim 5 (depends on 1) Process according to claim 1, wherein assistance notifiers are displayed on an optical surface (7) of the camera or scanning device when coverage has not yet been reached, wherein the assistance notifiers point into the direction in which the coverage may be reached by a relative movement between the dental assistance element (10), or a patient with the dental assistance element (10), and the camera or scanning device. ### Claim 6 (depends on 5) Process according to claim 5, wherein the assistance notifiers comprise arrows (12, 14). ### Claim 7 (depends on 1) Process according to claim 1, wherein the stencil (6) is displayed on an optical surface (7) of the camera or scanning device. ### Claim 8 (depends on 1) Process according to claim 1, wherein the stencil (6) is physically present and is displayed on a virtual image and is detected by an image recognition device and is converted into data, and wherein based on the data for the approach to the oriented relative position between the camera or scanning device and the dental assistance element, a modification of the degree of coverage of the stencil (6) with the mark (4) or the at least one part of the dental assistance element (10) is detected and/or the degree of coverage and/or the modification of the degree of coverage is signalled. ### Claim 9 (depends on 8) Process according to claim 8, wherein alignment advice (12, 14, 16) is output for the camera or scanning device depending on the position of the stencil (6) relative to the image detected. ### Claim 10 (depends on 9) Process according to claim 9, wherein the alignment advice (12, 14) concerns focusing or an electronically controllable detection range (7) of the camera, and based on the alignment advice, the detection of the image is modified, if necessary. ### Claim 11 (depends on 9) Process according to claim 9, wherein the alignment advice (12, 14, 16) is provided as optical and/or acoustic and/or mechanic advice. ### Claim 12 (depends on 11) Process according to claim 11, wherein the optical and/or acoustic and/or mechanic advice comprises vibrations and/or pulses for a user of the camera or scanning device. ### Claim 13 (depends on 1) Process according to claim 1, wherein the mark (4) or the at least one part of the dental assistance element (10) is provided for detection of an angular error, with points (30) arranged in a line, or with lines having congruence with corresponding line of points or mark of the stencil (6) in order to determine an angular error. ### Claim 14 (depends on 1) Process according to claim 1, wherein the process occurs on an application (app) on a smartphone. ### Claim 15 Process for an approach to an oriented relative position between a camera or scanning device and a dental assistance element (10), for recording the dental assistance element (10) comprising wherein the dental assistance element (10) comprises a miniature shade guide, wherein there is a mark (4) attached to the dental assistance element (10), and/or wherein at least one part of the dental assistance element (10) is used as a mark (4), wherein inside the camera or inside the scanning device or inside a memory for the camera or inside a memory for the scanning device, a stencil (6) which is congruent with or mathematically similar to the mark (4) or to the at least one part of the dental assistance element (10) is or are stored as a virtual image or characterising features of the mark (4) or at least one part of the dental assistance element (10) is stored, with relation to the distances of points from the stencil (6) and the mark (4) or the at least one part of the dental assistance element and/or an angle between lines and/or the positions of points and lines and/or the color values of points, and wherein for the approach to the oriented relative position between the camera or scanning device and the dental assistance element, a modification of the degree of coverage of the stencil (6) with the mark (4) or the at least one part of the dental assistance element (10) is detected and/or the degree of coverage and/or the modification of the degree of coverage is signalled, or wherein the approach to the oriented relative position between the camera or scanning device and the dental assistance element based on the stored features, the features of the mark (4) or the at least one part of the dental assistance element (10) are searched, wherein during the search, an identification of at least one of the features is detected and signalled. ### Claim 16 (depends on 2) Process according to claim 2, wherein for the approach to the oriented relative position between the camera or scanning device and the dental assistance element, the distance between the stencil (6) and the mark (4) or the at least one part of the dental assistance element (10) is displayed and/or the modification of this distance is signalled. ### Claim 17 (depends on 15) Process according to claim 15, wherein the process occurs on an application (app) on a smartphone.