EP1506368A1 - Appliance for digitising of curved and plane surfaces - Google Patents

Appliance for digitising of curved and plane surfaces

Info

Publication number
EP1506368A1
EP1506368A1 EP03746500A EP03746500A EP1506368A1 EP 1506368 A1 EP1506368 A1 EP 1506368A1 EP 03746500 A EP03746500 A EP 03746500A EP 03746500 A EP03746500 A EP 03746500A EP 1506368 A1 EP1506368 A1 EP 1506368A1
Authority
EP
European Patent Office
Prior art keywords
appliance
curved
digitising
plane surfaces
plane
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP03746500A
Other languages
German (de)
French (fr)
Inventor
Theodorus Maas
Thomas Gerardus Maria Jacobs
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Care-4-Feet International BV
Original Assignee
Care-4-Feet International BV
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Care-4-Feet International BV filed Critical Care-4-Feet International BV
Publication of EP1506368A1 publication Critical patent/EP1506368A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A43—FOOTWEAR
    • A43D—MACHINES, TOOLS, EQUIPMENT OR METHODS FOR MANUFACTURING OR REPAIRING FOOTWEAR
    • A43D1/00—Foot or last measuring devices; Measuring devices for shoe parts
    • A43D1/02—Foot-measuring devices
    • A43D1/025—Foot-measuring devices comprising optical means, e.g. mirrors, photo-electric cells, for measuring or inspecting feet
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/103—Measuring devices for testing the shape, pattern, colour, size or movement of the body or parts thereof, for diagnostic purposes
    • A61B5/107—Measuring physical dimensions, e.g. size of the entire body or parts thereof
    • A61B5/1077—Measuring of profiles
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B11/00—Measuring arrangements characterised by the use of optical techniques
    • G01B11/24—Measuring arrangements characterised by the use of optical techniques for measuring contours or curvatures
    • G01B11/25—Measuring arrangements characterised by the use of optical techniques for measuring contours or curvatures by projecting a pattern, e.g. one or more lines, moiré fringes on the object
    • G01B11/2518—Projection by scanning of the object

Definitions

  • Appliance for digitising of curved and plane surfaces Appliance for digitising of curved and plane surfaces.
  • the invention concerns an appliance for digitising of curved or plane surfaces.
  • the appliance based on a flatbed scanner where provisions are furnished to digitise for instance the form of the sole of a foot.
  • An appliance of this type is known from the publication US 6,205,230.
  • this appliance is the rainbow beam of a prism used.
  • a problem of this appliance is that the rainbow beam shows no sharp boundaries.
  • the invention uses the possibility to scan the object in a plane, perpendicular to the plane of the track of the scan head and to scan at a small angle in reference to the first scan in the direction of the movement of the scan head.
  • a shift in the direction of the scan head which is proportional to the distance between scan head and the object to be digitised. This is particularly in the case where the direction of the scan is not changed while scanning.
  • With a transformation program the digital information of both the scans can be converted to a three-dimensional image of the object.
  • the invention uses a simple prism to create a triangular measuring of which the precision is determined by the fineness of the scan.
  • the adaptations to the scanner to be used are minimal so commercial available scanners can be used.
  • An execution of the invention foresees the scanner of a structure which is foreseen of an elastic film with a line pattern where the film is pressed against the to be digitised object with for instance compressed gas.
  • the surface of the film is scanned by which a number of prisms which are placed on the scan head divides the scan in strips.
  • the prisms cause a shift of the image through what the distance between scan head and object can be calculated.
  • Fig. 1 shows a cross section through a part of the scanner and structure.
  • Fig. 2 shows an execution of the prism.
  • Fig. 3 shows a cross section through the prism.
  • Fig. 4 shows the principle of measuring.
  • Fig. 5 shows a transverse section of the film.
  • Fig. 6 shows the outcome of the scan for calculation.
  • FIG. 7 shows a cross section of a thickened line.
  • Fig. 1 is the structure indicated with (1).
  • film (2) On film (2) is made a line pattern (3) which consists of lines which are perpendicular to the direction of the scan. It can be useful to have a pattern of squares in some cases.
  • Air can be pumped between glass plate (4) and film (2) to press the film close to the object to be scanned.
  • scan head (5) On scan head (5) are placed a number of narrow prisms (6).
  • the prisms (6) cause a deflection of the light in the direction (13) of the movement of the scan head (5).
  • the prisms can be combined into one element to execute prism (6) as a wedge with notches (7).
  • prism (6) The effect of prism (6) is that the concerned partition of the line (3) on the film is recorded at an other position of the scan head than the partitions of the line (3) which are recorded direct by the scan head (5).
  • Fig. 4 is with (8) indicated the position of the scan head (5) where the line (3) is recorded via the prism.
  • line (3) is recorded direct.
  • the image that comes into being at the position of an impression as in Fig. 5 is one of a line (3) that is recorded as two interrupted lines (10, 11) as in Fig. 6.
  • the relative distance of the two interrupted lines (10, 11) is a size for the distance between scan head (5) and the to be measured object.
  • the interrupted line (10) the recorded line through the prism.
  • Fig. 1 is a practical situation shown where the elastic film (2) has a distance of 41 millimetre from the scan head (5).
  • the surface of glass plate (4) is 11 millimetre above the scan head (5).
  • the deflection (12) on the level of the elastic film (2) is here 3 millimetre. This means that on a distance of 11 millimetre the relative distance between the interrupted lines (10) and (11) 0.8 millimetre is. In this case the possible variation of the relative distance between the interrupted lines (10, 11) is from 0.8 to 3 millimetre.
  • a variant of the invention makes use of a prism without notches where first a scan is made with prism and after that another scan without prism. This way pairs of lines come into being where the relative distance a size is for the distance to the scan head (5).
  • a second variant uses scanners which have a double scan head where the second scan head is foreseen with a elongated prism or that the scan head is placed under an angle between 2 to 15 degrees in relation to the direction of the scan.
  • a third variant foresees into a adjustable optic where a second scan is made under a small angle.
  • the appliance is very suitable to digitise for instance the sole of a foot to manufacture arch supports. In this case it is profitable to foresee the elastic film with thickened lines (3) as is indicated in Fig. 7, so to derive the local pressure from the width of the line (3) for a foot which is loaded and pressed onto the glass plate (4).
  • the invention is not restricted to the digitising of parts of the body but can also with profit be used to digitise other articles and to digitise surface qualities such as form and deformity.
  • the invention is a profitable, compact and efficient appliance to scan local in shops sole of feet to manufacture arch supports.

Landscapes

  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Biophysics (AREA)
  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Medical Informatics (AREA)
  • Surgery (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Dentistry (AREA)
  • Molecular Biology (AREA)
  • Pathology (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Computer Vision & Pattern Recognition (AREA)
  • General Physics & Mathematics (AREA)
  • Length Measuring Devices By Optical Means (AREA)

Abstract

The invention concerns an appliance to digitise curved or plane surfaces. The appliance is based on a flatbed scanner where provisions are foreseen for instance to digitise the form of a foot-sole. Herewith is a structure that is foreseen with an elastic film with a line pattern where the film is pressed against the to be digitised object. The surface of the object is scanned while the scan is divided in strips by a number of prisms which are placed onto the scan head. The prisms causes a movement of the image through what the distance between scan head and object can be calculated. A version of the invention concerns an appliance to scan where plural or adjustable optics cause the image shift.

Description

Appliance for digitising of curved and plane surfaces.
The invention concerns an appliance for digitising of curved or plane surfaces. By preference is the appliance based on a flatbed scanner where provisions are furnished to digitise for instance the form of the sole of a foot.
An appliance of this type is known from the publication US 6,205,230. In this appliance is the rainbow beam of a prism used. A problem of this appliance is that the rainbow beam shows no sharp boundaries. The invention uses the possibility to scan the object in a plane, perpendicular to the plane of the track of the scan head and to scan at a small angle in reference to the first scan in the direction of the movement of the scan head. Among the two images comes into being a shift in the direction of the scan head which is proportional to the distance between scan head and the object to be digitised. This is particularly in the case where the direction of the scan is not changed while scanning. With a transformation program the digital information of both the scans can be converted to a three-dimensional image of the object.
The invention uses a simple prism to create a triangular measuring of which the precision is determined by the fineness of the scan. The adaptations to the scanner to be used are minimal so commercial available scanners can be used. An execution of the invention foresees the scanner of a structure which is foreseen of an elastic film with a line pattern where the film is pressed against the to be digitised object with for instance compressed gas. The surface of the film is scanned by which a number of prisms which are placed on the scan head divides the scan in strips. The prisms cause a shift of the image through what the distance between scan head and object can be calculated. When the line pattern on the elastic film is thickened with elastic material, the line will deform when the film is pressed with some pressure onto the glass plate of the scanner. The line can for instance have the cross section of a triangle. This enables the calculation of the local pressure by which a foot presses on a flat surface. The width of contact will be larger as the pressure increases. The invention will be explained according to the drawings. Fig. 1 shows a cross section through a part of the scanner and structure. Fig. 2 shows an execution of the prism. Fig. 3 shows a cross section through the prism. Fig. 4 shows the principle of measuring. Fig. 5 shows a transverse section of the film. Fig. 6 shows the outcome of the scan for calculation. Fig. 7 shows a cross section of a thickened line. ln Fig. 1 is the structure indicated with (1). On film (2) is made a line pattern (3) which consists of lines which are perpendicular to the direction of the scan. It can be useful to have a pattern of squares in some cases. Air can be pumped between glass plate (4) and film (2) to press the film close to the object to be scanned. On scan head (5) are placed a number of narrow prisms (6). The prisms (6) cause a deflection of the light in the direction (13) of the movement of the scan head (5). The prisms can be combined into one element to execute prism (6) as a wedge with notches (7).
The effect of prism (6) is that the concerned partition of the line (3) on the film is recorded at an other position of the scan head than the partitions of the line (3) which are recorded direct by the scan head (5). In Fig. 4 is with (8) indicated the position of the scan head (5) where the line (3) is recorded via the prism. At position (9) of the scan head (5) line (3) is recorded direct. The image that comes into being at the position of an impression as in Fig. 5 is one of a line (3) that is recorded as two interrupted lines (10, 11) as in Fig. 6. The relative distance of the two interrupted lines (10, 11) is a size for the distance between scan head (5) and the to be measured object. Herewith is the interrupted line (10) the recorded line through the prism.
In Fig. 1 is a practical situation shown where the elastic film (2) has a distance of 41 millimetre from the scan head (5). The surface of glass plate (4) is 11 millimetre above the scan head (5). The deflection (12) on the level of the elastic film (2) is here 3 millimetre. This means that on a distance of 11 millimetre the relative distance between the interrupted lines (10) and (11) 0.8 millimetre is. In this case the possible variation of the relative distance between the interrupted lines (10, 11) is from 0.8 to 3 millimetre. By means of calculations with a computer the three-dimensional image can be composed.
A variant of the invention makes use of a prism without notches where first a scan is made with prism and after that another scan without prism. This way pairs of lines come into being where the relative distance a size is for the distance to the scan head (5).
A second variant uses scanners which have a double scan head where the second scan head is foreseen with a elongated prism or that the scan head is placed under an angle between 2 to 15 degrees in relation to the direction of the scan.
A third variant foresees into a adjustable optic where a second scan is made under a small angle.
In a number of cases there is no need for the elastic film when the object has sufficient marks on which the scan can be made.
The appliance is very suitable to digitise for instance the sole of a foot to manufacture arch supports. In this case it is profitable to foresee the elastic film with thickened lines (3) as is indicated in Fig. 7, so to derive the local pressure from the width of the line (3) for a foot which is loaded and pressed onto the glass plate (4).
Also other parts of the body can be digitised to manufacture support elements.
The invention is not restricted to the digitising of parts of the body but can also with profit be used to digitise other articles and to digitise surface qualities such as form and deformity.
The invention is a profitable, compact and efficient appliance to scan local in shops sole of feet to manufacture arch supports.

Claims

Claims
1. Appliance for digitising of curved and plane surfaces with the help of one image sensor with one or more rows of photo-sensitive sensors characterised in that several optical sub systems the photo-sensitive sensors divide in minimal two groups that observe the surface marks in mutual different directions
2. Appliance for digitising of curved and plane surfaces as in claim 1 where by means of an adjustment device the same group sensors can observe the surface marks of the to be digitised plane consecutive in relative different directions.
3. Appliance for digitising of curved and plane surfaces as in claim 2, where the image sensor is adjustable.
4. Appliance for digitising of curved and plane surfaces as in claim 2, where the optics are adjustable.
5. Appliance for digitising of curved and plane surfaces as in claim 4, where the optics contain at least one adjustable lens.
6. Appliance for digitising of curved and plane surfaces as in claim 4, where the optics contain at least one adjustable mirror.
7. Appliance for digitising of curved and plane surfaces as in claim 4, where the optics contain at least one adjustable prism.
8. Appliance for digitising of curved and plane surfaces as in one of the previous claims where the surface marks are scanned with the help of an image sensor that moves in relation to the to be digitised plane.
9. Appliance for digitising of curved and plane surfaces as in claim 8, where the surface marks are scanned with the help of a flatbed scanner.
10. Appliance for digitising of curved and plane surfaces as in claim 8 or 9, where the scan head is foreseen with one or more series of lenses causing at least two images which are relative moved in the direction of the movement of the scan head.
11. Appliance for digitising of curved and plane surfaces as in one of the previous claims where a flatbed scanner is used with at least two image sensors that observe the surface marks of the plane to be digitised in mutual different directions and the images that come into being via the different image sensors are moved relative to each other in the direction of the movement of the scan head.
12. Appliance for digitising of curved and plane surfaces as in one of the previous claims, where the appliance is foreseen with an elastic film with marks.
13. Appliance for digitising of curved and plane surfaces as in claim 12, where the elastic film is mounted above a transparent base and the film can be pressed with a pressure medium against the to be measured plane.
14. Appliance for digitising of curved and plane surfaces as in claim 13, where the pressure medium consists of a gas.
15. Appliance for digitising of curved and plane surfaces as in claim 13, where the pressure medium consists of a fluid.
16. Appliance for digitising of curved and plane surfaces as in claim 12, 13, 14 or 15, where the film is foreseen with thickenings of elastic material.
17. Appliance for digitising of curved and plane surfaces as in claim 16, where the thickenings can be pressed against a transparent base.
18. Appliance for digitising of curved and plane surfaces as in one of the previous claims, where the appliance is used to digitise the form of a part of a body.
19. Appliance for digitising of curved and plane surfaces as in one of the previous claims, where the appliance is used to digitise the form of a foot-sole.
20. Method to digitise a plane with the help of an appliance as in one of the previous claims.
* * * *
EP03746500A 2002-04-15 2003-03-25 Appliance for digitising of curved and plane surfaces Withdrawn EP1506368A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
NL1020394A NL1020394C2 (en) 2002-04-15 2002-04-15 Device for digitizing curved and flat surfaces.
NL1020394 2002-04-15
PCT/NL2003/000222 WO2003087717A1 (en) 2002-04-15 2003-03-25 Appliance for digitising of curved and plane surfaces

Publications (1)

Publication Number Publication Date
EP1506368A1 true EP1506368A1 (en) 2005-02-16

Family

ID=29244986

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03746500A Withdrawn EP1506368A1 (en) 2002-04-15 2003-03-25 Appliance for digitising of curved and plane surfaces

Country Status (4)

Country Link
EP (1) EP1506368A1 (en)
AU (1) AU2003225413A1 (en)
NL (1) NL1020394C2 (en)
WO (1) WO2003087717A1 (en)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7392559B2 (en) 2005-04-28 2008-07-01 Esoles L.L.C. Method and apparatus for manufacturing custom orthotic footbeds
US7552494B2 (en) * 2005-04-28 2009-06-30 Esoles, L.L.C. Method and apparatus for manufacturing custom orthotic footbeds that accommodate the effects of tibial torsion
BRPI0911009B8 (en) * 2008-07-16 2021-06-22 Podo Activa S L method and device for obtaining a plantar image and double-sided machining of the insole obtained by the method
EP2149313A1 (en) * 2008-07-29 2010-02-03 Cluster Aragones Del Calzado Method for generating an elastic membrane for supporting the whole of the plantar arch integrated in the shoe and the membrane resulting from this method
HRP20120714B1 (en) * 2012-09-07 2015-12-04 Cognitus D.O.O. Za Informatiku THREE-DIMENSIONAL DIGITALIZER OF FOOT AND OTHER SURFACES BASED ON A COMMERCIALLY AVAILABLE TABLE SCANNER
US20140276094A1 (en) * 2013-03-15 2014-09-18 Roy Herman Lidtke Apparatus for optical scanning of the foot for orthosis
CA2948875C (en) * 2014-05-21 2022-05-03 Cryos Technologies Inc. Three-dimensional plantar imaging apparatus and membrane assembly for use in the same
EP3130885A1 (en) * 2015-08-11 2017-02-15 Ivoclar Vivadent AG Scanning apparatus, balloon for operation with a scanning apparatus, method for operating a scanning apparatus and control program for a scanning apparatus
WO2017137398A1 (en) * 2016-02-08 2017-08-17 Ivoclar Vivadent Ag Scanning arrangement having a scanning head
CA3020757C (en) 2016-04-13 2024-02-13 Cryos Technologies Inc. Membrane-based foot imaging apparatus including a camera for monitoring foot positioning
US12419521B2 (en) 2020-08-21 2025-09-23 Empo Health, Inc. System to detect foot abnormalities

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Publication number Priority date Publication date Assignee Title
FR2682028B1 (en) * 1991-10-03 1998-04-17 Michel Leonard METHOD, DEVICE AND APPARATUS FOR OBTAINING AN IMPRESSION OF THE SURFACE OF AN OBJECT OR A PART OF THE BODY.
JPH06194118A (en) * 1992-12-24 1994-07-15 Nippon Telegr & Teleph Corp <Ntt> Optical sensor
ES2215208T3 (en) * 1996-10-10 2004-10-01 Elpatronic Ag PROCEDURE AND DEVICE FOR THE OPTICAL VERIFICATION OF A WELDING SEWING.
SG72860A1 (en) * 1998-08-27 2001-03-20 Agilent Technologies Inc Leaded components inspection system
CA2304978C (en) * 2000-04-13 2008-02-12 Giuceppe Milioto Limb extremity positioning device and measurement method
DE10033828A1 (en) * 2000-07-19 2002-01-31 Robert Massen Optical detection of the spatial shape of bodies and body parts

Non-Patent Citations (1)

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Title
See references of WO03087717A1 *

Also Published As

Publication number Publication date
NL1020394C2 (en) 2003-10-17
WO2003087717A1 (en) 2003-10-23
AU2003225413A1 (en) 2003-10-27

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