Structure damage cause estimation system, structure damage cause estimation method, and structure damage cause estimation server

A structure damage cause estimation method comprising:

• an image acquisition step of, with an image acquisition unit, acquiring a captured image of a target structure to be inspected;
• an actual size information acquisition step of, with an actual size information acquisition unit, acquiring an actual size of a characteristic portion of the target structure in the captured image or an actual length of the target structure;
• a damage detection step of, with a damage detection unit, detecting damage from the captured image acquired in the image acquisition step, and calculating a degree of the damage, based on information acquired in the actual size information acquisition step;
• a similar damage extraction step of, with a similar damage extraction unit, by using a database having data of a captured image of damage of a structure before the repair, a damage cause of the structure, damage information of the structure including a type of the damage, a position of the damage and a degree of the damage, and at least one of structure information, environment information and history information of the structure, determining a degree of similarity of the damage detected in the damage detection step to damage of the structure in the database, and extracting one or more kinds of similar damage for which the degree of similarity is high;
• and
• a damage cause presentation step of, with a damage cause presentation unit, presenting damage causes of the kinds of similar damage extracted in the similar damage extraction step,
• wherein the method further comprises:
• determining the degree of similarity, based on a feature space having information as feature vectors, the feature space being a multi-dimensional space defined by parameters selected from the information;
• setting a predetermined distance from damage of the target structure as a predetermined threshold value;
• calculating a distance in the multi-dimensional space of the parameters between damage of the target structure and damage of another structure stored in the database;
• and
• extracting damage having the calculated distance equal to or less than the predetermined threshold value, as similar damage, and
• wherein the method further comprises:
• storing at least one of captured images or pieces of damage information of the damage of the structure at a plurality of past time points,
• acquiring chronological images of the target structure, and
• using a chronological change in a position of the damage or the degree of the damage obtained from the captured images or the pieces of damage information of the damage of the structure at the plurality of past time points to determine the degree of similarity.

A structure damage cause estimation server that is connected to a user terminal via a network and estimates a damage cause of a target structure to be inspected, the structure damage cause estimation server comprising:

• a memory configured to store data of a captured image of damage of a structure before repair, a damage cause of the structure, damage information of the structure including a type of the damage, a position of the damage and a degree of the damage, and at least one of structure information, environment information and history information of the structure;
• and
• at least one processor configured to:
• acquire a captured image of a target structure to be inspected;
• acquire actual size information including an actual size of a characteristic portion of the target structure in the captured image or an actual length of the target structure;
• detect damage from the captured image, and calculate a degree of the damage, based on the actual size information;
• determine a degree of similarity of the damage to damage of the structure in the memory, and extract one or more kinds of similar damage for which the degree of similarity is high;
• present damage causes of the kinds of similar damage;
• and
• receive the captured image from the user terminal via the network, and transmit the damage causes to the user terminal, wherein
• the at least one processor is further configured to:
• determine the degree of similarity, based on a feature space having information as feature vectors, the feature space being a multi-dimensional space defined by parameters selected from the information;
• set a predetermined distance from damage of the target structure as a predetermined threshold value;
• calculate a distance in the multi-dimensional space of the parameters between damage of the target structure and damage of another structure stored in the memory;
• and
• extract damage having the calculated distance equal to or less than the predetermined threshold value, as similar damage,
• the memory is configured to store at least one of captured images or pieces of damage information of the damage of the structure at a plurality of past time points,
• the at least one processor is configured to acquire chronological images of the target structure, and
• the at least one processor is configured to use a chronological change in a position of the damage or the degree of the damage obtained from the captured images or the pieces of damage information of the damage of the structure at the plurality of past time points to determine the degree of similarity.