Estimating dimensions of geo-referenced ground level imagery using orthogonal imagery

Patent metadata

Field	Value
Publication number	US-11004259-B2
Application number	US-201415025132-A
Country	US
Kind code	B2
Filing date	Oct 24, 2014
Priority date	Oct 25, 2013
Publication date	May 11, 2021
Grant date	May 11, 2021

Abstract

A system and method is provided for measurements of building façade elements by combining ground-level (201) and orthogonal imagery (906). The measurements of the dimension of building façade elements are based on ground-level imagery that is scaled and geo-referenced using orthogonal imagery (209). The method continues by creating a tabular dataset (1002) of measurements for one or more architectural elements such as siding (e.g., aluminum, vinyl, wood, brick and/or paint), windows or doors. The tabular dataset can be part of an estimate report (1002).

First claim

What is claimed is:

1. A method of measuring in a three-dimensional building model, comprising:
collecting, using a smartphone, a plurality of ground-level images capturing all sides of a single building;
determining a location for the plurality of ground-level images;
generating an outline of a plurality of façades associated with all sides of the single building shown within the ground-level images to assist in generation of a three-dimensional building model of the single building;
generating the three-dimensional building model based on the outlined plurality of façades associated with all sides of the single building, wherein the generating the three-dimensional building model includes at least correlation and rectification of the outlined plurality of façades and representing points of the single building projected in three-dimensional space;
retrieving a geo-referenced top-view orthogonal image of the single building based on the determined location of at least one of the plurality of ground-level images;
deriving a scale as between all points of the three-dimensional building model by geo-referencing all points of the three-dimensional building model using the geo-referenced top-view orthogonal image by correlating the geo-referenced top-view orthogonal image to include matching at least two points of the three-dimensional building model to corresponding roof pixels in the geo-referenced top-view orthogonal image and identifying those matches as being part of a same feature within the three-dimensional building model of the single building;
measuring, on the scaled three-dimensional building model, between at least one starting geo-referenced point and at least one ending geo-referenced point to determine dimensions of one or more architectural elements, the dimensions including at least width and height of the one or more architectural elements, located within at least a first façade of the geo-referenced three-dimensional building model; and
labeling the architectural element within the scaled three-dimensional building model, the labeling representing the determined dimensions.

2. The method of claim 1 , wherein the one or more architectural elements comprise windows.

3. The method of claim 1 , wherein the one or more architectural elements comprise doors.

4. The method of claim 1 , further comprising creating a tabular dataset of measurements for one or more architectural elements and their respective determined measurements.

5. The method of claim 4 , wherein the tabular dataset comprises one or more of default ones of the architectural elements or selectable ones of the architectural elements.

6. The method of claim 4 , wherein the tabular dataset comprises one or more portions of an estimate report.

7. The method of claim 6 , wherein the one or more portions of an estimate report are modified using product data.

8. The method of claim 4 , wherein the tabular dataset comprises measurements for siding.

9. The method of claim 4 , wherein the tabular dataset comprises measurements for paint.

10. The method of claim 1 , wherein the measuring is conducted interactively by repeated selecting of at least one starting geo-referenced point and at least one ending geo-referenced point.

11. A method of measuring in a three-dimensional building model, comprising:
collecting, using a smartphone, a plurality of ground-level images capturing all sides of a single building;
determining a location for the plurality of ground-level images;
generating an outline of a plurality of façades shown within the ground-level images of all sides of the single building to assist in generation of a three-dimensional building model of the single building;
generating the three-dimensional building model based on the outlined plurality of façades, wherein the generating the three-dimensional building model includes at least correlation and rectification of the outlined plurality of façades and representing points of the single building projected in three-dimensional space;
retrieving a geo-referenced top-view orthogonal image of the single building based on the determined location of at least one of the plurality of ground-level images;
deriving a scale as between all points of the three-dimensional building model by geo-referencing all points within the three-dimensional building model by matching at least two points of the three-dimensional building model associated with at least one outlined façade to corresponding roof pixels in the geo-referenced top-view orthogonal image;
measuring, on the scaled three-dimensional building model, between at least one starting geo-referenced point and at least one ending geo-referenced point to determine dimensions of one or more architectural elements located within the plurality of façades; and
labeling the one or more architectural element with the determined dimensions.

Assignees

• Hover Inc

Inventors

• Hu Bo
• Sahu Sarthak

Classifications

• G06T17/20 Primary

  Finite element generation, e.g. wire-frame surface description, {tesselation} · CPC title

• G06T7/75

  involving models · CPC title

• G06T17/00 Primary

  Three-dimensional [3D] modelling for computer graphics · CPC title

• G06T2210/04

  Architectural design, interior design · CPC title

• G06T2219/012

  Dimensioning, tolerancing · CPC title