# US 2013/0278783 A1 · Alignment system for a digital image capture device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2013/0278783 A1 - Document ID: US20130278783A1 - Status: Published application - Kind: A1 - Application number: 13/451,772 - Filed: 2012-04-20 - Published: 2013-10-24 - Earliest claimed: 2012-04-20 - Assignees: Hewlett-Packard Development Company, L.P. - Inventors: DAVID B. LARSON - Web page: https://patentgrep.com/patent/US20130278783A1 ## CPC - H04N 1/19594: {using a television camera or a still video camera} - H04N 2201/0422: Media holders, covers, supports, backgrounds; Arrangements to facilitate placing of the medium (H04N2201/0406 - H04N2201/0412, H04N2201/0434 take precedence) - H04N 2201/0436: Scanning a picture-bearing surface lying face up on a support (H04N2201/0434 takes precedence; using cylindrical picture bearing surfaces H04N1/06; with manual scanning H04N1/107) - H04N 2201/0446: Constructional details not otherwise provided for, e.g. mounting of scanning components (H04N2201/0448 takes precedence) - H04N 2201/0448: for positioning scanning elements not otherwise provided for; Aligning, e.g. using an alignment calibration pattern - H04N: PICTORIAL COMMUNICATION, e.g. TELEVISION ## Abstract A method for aligning an image capture device for a print device includes providing a capture stage on which an object to be imaged by the capture device is placed. The capture stage includes a plurality of reference markers spaced apart by a predetermined distance. The reference markers are imaged with the capture device. A distance between the reference markers is measured. A correction difference between the measured distance of the reference markers and the predetermined distance is computed. An angular correction value based on the correction difference is computed. The angular position of the capture device relative to the capture stage is adjusted based upon the angular correction value. ## Claims ### Claim 1 A method for aligning an image capture device for a print device comprising: providing a capture stage on which an object to be imaged by the capture device is placed, the capture stage including a plurality of reference markers spaced apart by a predetermined distance; imaging the reference markers with the capture device; measuring a distance between the reference markers; computing a correction difference between the measured distance of the reference markers and the predetermined distance; computing an angular correction value based on the correction difference; and adjusting an angular position of the capture device relative to the capture stage based upon the angular correction value. ### Claim 2 (depends on 1) The method of claim 1 wherein the plurality of reference markers comprise first and second pairs of reference markers spaced apart a distance in a first direction along the capture stage, the reference markers within each first and second pair being spaced from one another a distance in a second direction along the capture stage that is perpendicular to the first direction. ### Claim 3 (depends on 1) The method of claim 1, further comprising repeating (ii) through (vi) until the angular correction value is within a predetermined threshold. ### Claim 4 (depends on 1) The method of claim 1, wherein the capture device includes a first planar surface that faces towards the capture stage and the capture stage includes a second planar surface that faces towards the capture device, the angular position of the capture device relative to the capture stage being adjusted until the first and second planar surfaces are substantially parallel to one another. ### Claim 5 (depends on 1) The method of claim 1, wherein the angular correction value is displayed on a monitor for viewing by an operator of the capture device. ### Claim 6 (depends on 1) The method of claim 1, wherein adjusting the angular position of the capture device comprises placing a shim of a first size from a plurality of different sized shims between the print device and a support arm secured to the capture device, the first size corresponding with the angular correction value. ### Claim 7 (depends on 6) The method of claim 6 further comprising locking the angular position of the support arm relative to the capture stage with magnetic force. ### Claim 8 (depends on 1) The method of claim 1 further comprising providing a lookup table that correlates the angular correction value to one of a plurality of different sized mechanical shims. ### Claim 9 A system comprising: an image capture device to image reference markers from a capture stage, the reference markers being spaced apart by a predetermined distance; memory to store instructions, which when executed by a processor cause the processor to calculate a distance between the reference markers; compute a correction difference between the measured distance of the reference markers and the predetermined distance; compute an angular correction value based on the correction difference; and generate an output based on the angular correction value. ### Claim 10 (depends on 9) The system of claim 9, wherein the memory further comprises a lookup table that correlates the angular correction value to one of a plurality of different sized mechanical shims, the output being generated from the look-up table indexed according to the angular correction value. ### Claim 11 (depends on 10) The system of claim 10, further comprising a display that provides a visualization corresponding to the output. ### Claim 12 (depends on 9) The system of claim 9, wherein the visualization includes an identification of one of a plurality of different sized shims to adjust the angular position of the capture device. ### Claim 13 (depends on 12) The system of claim 12, further comprising a set of differently sized shims for use in adjusting the angular position of the capture device relative to the capture stage, each differently sized shim corresponding with a different angular correction value. ### Claim 14 A system comprising: a capture stage on which an object to be imaged by the capture device is placed, the capture stage including a plurality of reference markers spaced apart by a predetermined distance; an image capture device to image the reference markers from the capture stage; a memory to store instructions and a lookup table that correlates angular correction values to a mechanical shim; a processor to access the instructions from the memory, the instructions comprising: a distance calculator to calculate a distance between the reference markers; a difference calculator to compute a correction difference between the measured distance of the reference markers and the predetermined distance; a correction calculator to compute an angular correction value based on the correction difference; and an output generator to generate an output based on the angular correction value. ### Claim 15 (depends on 14) The system of claim 14, further comprising a set of differently sized shims for use in adjusting the angular position of the capture device relative to the capture stage, each of the differently sized shims corresponding with a different angular correction value, the output comprising an identification of a selected one of the differently sized shims.