SYSTEMS AND METHODS FOR THE MEASUREMENT OF SURFACES

• US 20100091104A1
• Filed: 09/27/2007
• Published: 04/15/2010
• Est. Priority Date: 09/27/2006
• Status: Abandoned Application

• Current Assignee: Georgia Tech Research Corporation (University System of Georgia)
• Original Assignee: Georgia Tech Research Corporation (University System of Georgia)
• Inventors: Duckworth, Mark, Lankton, Shawn M., Patel, Nirmal J., Sprigle, Stephen, Starner, Thad
• Application Number:
  US12/443,158
• Publication Number:
  US 20100091104A1
• Time in Patent Office: Days
• US Class Current: 348/136
• CPC Class Codes: A61B 5/0059 using light, e.g. diagnosis by transillumination, diascopy, fluorescence A61B5/0093, A61B5/1455, A61B5/02416 and A61B5/0261 take precedence
• CPC Class Codes: A61B 5/0064 Body surface scanning
• CPC Class Codes: A61B 5/445 Evaluating skin irritation or skin trauma, e.g. rash, eczema, wound, bed sore
• CPC Class Codes: G06T 2207/30004 Biomedical image processing
• CPC Class Codes: G06T 7/0012 Biomedical image inspection
• CPC Class Codes: G06T 7/62 of area, perimeter, diameter or volume
• CPC Class Codes: Y02A 90/10 Information and communication technologies [ICT] supporting adaptation to climate change, e.g. for weather forecasting or climate simulation

Abstract

The present invention discloses systems and methods for the measurement of surfaces. More particularly, the present invention discloses a portable, hand-held, non-contact surface measuring system comprising an image capturing element, at least four projectable reference elements positioned parallel to one another at known locations around the image capturing element, a processing unit, and a user interface. The present invention further discloses a method for the non-contact surface measurement comprising projecting at least four references onto a target surface, capturing an image of the targeted surface and the projected references with the image transferring device, transferring the image to a processing unit, processing the image using triangulation-based computer vision techniques to correct for skew and to obtain surface measurement data, transferring the data to the user interface, modifying the data with the user interface. The systems and methods for the measurement of surfaces can be applied to the measurement of biological surfaces, such as skin, wounds, lesions, and ulcers.

Claims

1-58. -58. (canceled)

59. A portable, hand-held, non-contact self-contained surface measuring system capable of providing quantitative measurements of a target object on a target surface, the system comprising:

an image capturing element for capturing an image of at least a portion of the target object;

at least four projectable reference elements for defining at least one characteristic of at least a portion the target object;

a processing unit; and

a user interface for displaying the captured image.

60. The system of claim 59, wherein the target object is a wound and the target surface is a biological surface.

61. The system of claim 59, wherein the characteristic of at least a portion of the target object is a shape of the target object, a size of the target object, a boundary of the target object, an edge of the target object, a depth of the target object, or combinations thereof.

62. The system of claim 59, wherein the projectable reference elements are positioned substantially parallel to one another at known locations around the image capturing element.

63. The system of claim 59, wherein at least one of the projectable reference elements is a laser.

64. The system of claim 59, wherein the processing unit further comprises a computer vision component for displaying the captured image.

65. The system in claim 64, wherein the computer vision component performs an edge detection based segmentation algorithm.

66. The system in claims 65, wherein the computer vision component automatically detects boundaries of the target object.

67. The system of claim 59, wherein the user interface allows user-modification of detected boundaries of the target object.

68. The system of claim 59, wherein surface measurement of the target object is performed with a single image.

69. A method for providing quantitative measurements of a target object on a target surface, the method comprising:

providing a target object on a target surface;

projecting at least four reference elements at least a portion of the target object;

capturing an image of at least a portion of the target object; and

defining at least one characteristic of at least a portion of the target object.

70. The method of claim 69, further comprising displaying the captured image on a user interface.

71. The method of claim 69, wherein the target object is a wound and the target surface is a biological surface.

72. The method of claim 69, wherein the characteristic of at least a portion of the target object is a shape of the target object, a size of the target object, a boundary of the target object, an edge of the target object, a depth of the target object, or combinations thereof.

73. The method of claim 69, wherein defining at least one characteristic of at least a portion of the target object comprises performing an edge detection based segmentation algorithm.

74. The method of claim 69, further comprising displaying detected boundaries of the target object.

75. A method for non-contact surface measurement of a target object on a target surface, the method comprising:

projecting at least four reference points on at least a portion of the target object;

locating the at least a portion of the target object and the projected reference points within the viewfinder of an image capturing device;

capturing an image of the at least a portion of the target object and the projected reference points with the image capturing device;

transferring the image to a processing unit;

processing the captured image using triangulation-based computer vision techniques to correct for skew and to obtain surface measurement data;

transferring the data to the user interface; and

modifying the data with the user interface.

76. The method of claim 75, further comprising determining at least one characteristic of at least a portion of the target object.

77. The method of claim 76, wherein at least one characteristic of at least a portion of the target object is a size of the target object, a boundary of the target object, an edge of the target object, a depth of the target object, or combinations thereof.

78. The method of claim 76, wherein surface measurement of the target object is performed with a single image.