Geologically constrained infrared imaging detection method and system for urban deeply-buried strip-like passage

A geologically constrained infrared imaging detection method for an urban buried strip passage, the method comprising:

• (1) generating an urban hierarchical three-dimensional temperature field model according to urban street digital elevation model (DEM) data and geological data corresponding to urban streets,
• wherein the urban hierarchical three-dimensional temperature field model comprises a three-dimensional temperature field model of concrete material covering urban surface roads and a three-dimensional temperature field model of urban street subterranean strata;
• (2) determining urban stratum geological background heat flux via the urban hierarchical three-dimensional temperature field model, and using a total solar radiation energy distribution model to determine urban surface total solar radiation energy on the basis of the DEM data;
• (3) filtering out the urban surface total solar radiation energy from an infrared remote sensing image of a region corresponding to a strip underground target;
• (4) filtering out, with reference to the DEM data, the urban stratum geological background heat flux from the infrared remote sensing image processed in step (3), to acquire a perturbation signal image of an urban street buried strip passage;
• and
• (5) performing detecting and positioning using an inverse detection method after preprocessing the perturbation signal image of the urban street buried strip passage, to acquire location information of a strip underground passage;
• wherein the urban hierarchical three-dimensional temperature field model is generated on the basis of geometric characteristics of the strip underground passage, urban stratum background thermal radiation characteristics, and thermal radiation characteristics of the strip underground passage, and the total solar radiation energy distribution model is constructed via distribution of direct solar radiation and distribution of diffuse solar radiation.