Spatial and characteristic property data to detect a source in a system
Processes, algorithms and techniques are disclosed for detecting the presence of a source of at least one of heat, mass, momentum, energy, electrical field, and species in a system, such as, for identifying the presence of a heat source and its 3D location within a body part, and also to identify absence of a heat source within the body part. Multi-view thermal images are obtained of the body part and thermal and spatial information in different views are obtained. Iterative algorithms are developed to determine the presence of a heat source in the body part by employing the Physics-Informed Neural Network analyzer. Methods of generating a spatial-point-cloud and thermal-spatial-point-cloud are disclosed.
1 . A method of generating a thermal-spatial-point-cloud of an object, comprising:
placing the object within an image acquisition system comprising an optical camera, an infrared camera, and a light projector projecting a beam of light creating a light marker in the form of a spot or a line on a surface of the object;
rotating around an axis of rotation of the image acquisition system or the object;
obtaining multi-view infrared images of the surface of the object;
obtaining multi-view optical images of the surface of the object, wherein each multi-view optical image contains the light marker;
obtaining spatial information of each light marker from the multi-view optical images of the object using the angular and spatial relationship among the optical camera, infrared camera and the axis of rotation and the angular relationship of the light projector to the axis of rotation to generate a spatial-point-cloud of the surface of the object;
registering the multi-view optical images and multi-view infrared images to generate registered multi-view infrared images containing the light markers;
obtaining a temperature at each location of the light markers from the registered multi-view infrared images of the surface of the object corresponding to the spatial-point-cloud of the surface of the object; and
generating a thermal-spatial-point-cloud of the surface of the object from the temperature at the locations of the light markers corresponding to the spatial-point-cloud.
2 . The method of claim 1 , wherein the optical camera is oriented such that an angular center line of the optical camera passes through the axis of rotation and is normal to the axis of rotation.
3 . The method of claim 1 , wherein the light projector is oriented such that the light projector, the light marker, and the axis of rotation are in a same plane.
4 . The method of claim 1 , wherein the infrared camera is oriented such that an angular center line of the infrared camera passes through the axis of rotation and is normal to the axis of rotation.
5 . The method of claim 1 , wherein the optical camera and the infrared camera are placed in a plane that is normal to the axis of rotation.
6 . The method of claim 1 , further comprising generating a spatial-point-cloud of the interior of the object from the spatial information through interpolation.
7 . The method of claim 1 , wherein:
i) the infrared camera is placed at the same angular position around the axis of rotation as the optical camera in at least one of the images generated by the optical camera,
ii) the axis of rotation is at the center line of the images obtained by the infrared camera and the optical camera,
iii) registration of the optical images and infrared images is obtained by matching the center lines between the images at the same view to generate registered infrared images with light markers, and
iv) the thermal-spatial-point-cloud is generated using the temperatures at the location of the light markers on the registered infrared images.
8 . The method of claim 7 , wherein the object is a female breast, the thermal-spatial-point-cloud of the breast includes thermal-spatial-point-clouds of the surfaces of the breast, including the base of the breast connecting to the chest, and the interior region of the breast.
9 . The method of claim 8 , wherein the breast is imaged with the image acquisition system while the breast is in a position similar to that obtained while the female lies in a prone position with her breast hanging down.