PATENT CLAIM ANALYSIS

Application Number: 15761075
Application Type: Utility
Filing Date: 2018-03
Publication Date: 2018-09
Patent Classification: ["356", "300000"]

Abstract:
A measuring device ( 10 ) for determining the location of one or more measurement points relative to the measuring device. The measuring device is arranged to be coupled to a non-contact distance measuring device or EDM ( 12 ) and one or more sensors ( 16 ) for determining the orientation of the EDM. The measuring device comprises an image capture device or ICD ( 20 ) operable to output digital images and being arranged to be coupled to the EDM such that the ICD moves in known registration with respect to the EDM. A controller ( 28 ) is arranged to receive data from the one or more sensors and the ICD. The controller is configured to: a) associate an image with the orientation of the EDM during exposure of the image; b) locate one of the measurement points within the image; and c) use the location of the measurement point within the image in combination with the EDM orientation to establish the direction of the measurement point with respect to the measuring device.

Claim (Index 21):
A method of calibrating intrinsic and extrinsic image capture device (ICD) parameters for a measuring device, which can be a measuring device according to  claim 1 , comprising an ICD which is operable to output digital images and is coupled to a non-contact distance measuring device (EDM) such that the ICD moves in fixed registration with respect to the EDM, the intrinsic parameters describing parameters of the ICD, the extrinsic parameters describing the position and orientation of the ICD coordinate system with respect to the EDM coordinate system, the method comprising:\n (a) establishing a first approximation of:\n the position and orientation of the ICD coordinate system with respect to the EDM coordinate system; \n the ICD focal length; \n the ICD pixel size; \n a principal point, the principal point being defined by the point of intersection of the optical axis with the ICD image sensor, the first approximation optionally being taken to be at the centre of the ICD image sensor; and \n the ICD distortion parameters; \n (b) selecting a calibration point having a known three dimensional position with respect to the distance measuring device; (c) locating the calibration point within the image to record a location (x0, y0); (d) recording pan and tilt angles of the EDM direction (h0 and v0); (e) optionally updating the first approximation of the principal point to equate to (x0, y0); (f) changing the orientation of the EDM so that the calibration point moves within the image; (g) locating the calibration point within the image and recording the image coordinates of the calibration point (x1, y1) and the pan and tilt angle of the EDM (h1 and v1); (h) solving for ICD focal length, whereby solving for ICD focal length comprises:\n calculating the focal length using a pin-hole camera model; and \n (i) solving for ICD roll relative to the EDM coordinate system, whereby solving for ICD roll relative to the EDM coordinate system comprises:\n defining a line segment intersecting (x0, y0) and (x1, y1); and \n measuring the direction of the line to calculate the angle of roll.

Metadata:
- Claim Count in Document: 58.0
- Percentile: 90.0
- Lexical Diversity: 2.59722
- Patent Class: 356.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: True
- Related Applications: ['15389877', '13348740', '14363269', '13696982', '14363098']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.6813357070732704
- 35 USC 102 Novelty (BERT): 0.4751542599582155
- Combined Prediction Score: 0.6607175623617649
- Mean Citation Score: 161.611182
- Max Citation Score: 181.24504
- Similarity Product: 133.83865882092476

Labels:
- Claim Label 101: 1
- Claim Label 102: 1
- Claim Label 103: 1
- Claim Label 112: 1
- Combined Label: 1
- Label 101 Adjusted: 1

Dataset: test