Device and method for making measurements
First Claim
1. A device comprising:
- a viewing screen which presents first and second reference icons having an adjustable reference characteristic controlled with substantially only a single adjustable parameter;
an image-gathering component for providing the screen with frames of a video image of a scene in which first and second scene locations have a scene characteristic whose value is to be approximately determined; and
a control system responsive to external instruction (a) for causing a frame of the image of the scene to be captured while the first reference icon is approximately superimposed on the first scene location or for causing a frame of the image of the scene to be captured and then for causing the first reference icon to be approximately superimposed on the first scene location in the captured frame and (b) for causing the second reference icon to be approximately superimposed on the second scene location in the captured frame as the adjustable parameter is adjusted to enable the reference characteristic to approximately match the scene characteristic, the device determining the value of the adjustable parameter, or the value of a further parameter containing the adjustable parameter, as an approximation to the value of the scene characteristic in the captured frame when the first and second reference icons are respectively approximately superimposed on the first and second scene locations in the captured frame.
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Accused Products
Abstract
An information-presentation device (100) contains a viewing screen (108) and an image-gathering component (106). The viewing screen presents first and second reference icons (136 and 138) having an adjustable reference characteristic controlled with substantially only a single adjustable parameter. The image-gathering component provides the screen with frames of a video image of a scene in which first and second scene locations (152 and 154) have a scene characteristic whose value is to be approximately determined. A user first causes the first reference icon to be approximately superimposed on the first scene location in a captured frame of the image. The user then causes the second reference icon to be approximately superimposed on the second scene location in the captured frame as the adjustable parameter is adjusted to enable the reference characteristic to approximately match the scene characteristic and thereby provide a measurement of the scene characteristic.
3 Citations
30 Claims
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1. A device comprising:
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a viewing screen which presents first and second reference icons having an adjustable reference characteristic controlled with substantially only a single adjustable parameter; an image-gathering component for providing the screen with frames of a video image of a scene in which first and second scene locations have a scene characteristic whose value is to be approximately determined; and a control system responsive to external instruction (a) for causing a frame of the image of the scene to be captured while the first reference icon is approximately superimposed on the first scene location or for causing a frame of the image of the scene to be captured and then for causing the first reference icon to be approximately superimposed on the first scene location in the captured frame and (b) for causing the second reference icon to be approximately superimposed on the second scene location in the captured frame as the adjustable parameter is adjusted to enable the reference characteristic to approximately match the scene characteristic, the device determining the value of the adjustable parameter, or the value of a further parameter containing the adjustable parameter, as an approximation to the value of the scene characteristic in the captured frame when the first and second reference icons are respectively approximately superimposed on the first and second scene locations in the captured frame. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A method of operating a device having an image-gathering component and a viewing screen which presents first and second reference icons having an adjustable reference characteristic controlled with substantially only a single adjustable parameter, the image-gathering component providing the screen with frames of a video image of a scene in which first and second scene locations have a scene characteristic whose value is to be approximately determined, the method comprising:
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capturing a frame of the image of the scene; approximately superimposing the first reference icon on the first scene location before or after capturing the frame of the image of the scene such that the first reference icon is so superimposed on the first scene location in the captured frame; approximately superimposing the second reference icon on the second scene location in the captured frame as the adjustable parameter is adjusted to enable the reference characteristic to approximately match the scene characteristic; and determining the value of the adjustable parameter, or the value of a further parameter containing the adjustable parameter, as an approximation to the value of the scene characteristic in the captured frame when the first and second reference icons are respectively approximately superimposed on the first and second scene locations in the captured frame. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30)
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Specification