Information processing apparatus, information processing method, and information processing program

An information processing method, comprising:

• a signal initialization step in which an information processing apparatus acquires an initial value of a pressure signal that is obtained after reception, by a receiving unit, of an elasticity wave propagating from a measuring object;
• an impulse response initialization step in which the information processing apparatus acquires an initial value of an impulse response of the receiving unit;
• an output step in which the information processing apparatus outputs a modified pressure signal based on the initial value of the pressure signal and the initial value of the impulse response,
• wherein said output step includes generating the modified pressure signal by executing the following steps iteratively according to a predetermined condition;
• a signal modifying step in which the information processing apparatus modifies the pressure signal in use of the impulse response;
• a signal constraining step in which the information processing apparatus modifies the pressure signal based on constraint conditions, wherein the constraint conditions include at least one of high contrast properties, positivity, and frequency band characteristics;
• an impulse response modifying step in which the information processing apparatus modifies the impulse response in use of the pressure signal;
• and
• an impulse response constraining step in which the information processing apparatus modifies the impulse response based on constraint conditions which are time-bandwidth characteristics of the impulse response.

A non-transitory computer-readable storage medium storing, in executable form, an information processing program for causing an information processing apparatus to execute an information processing method having:

• a signal initialization step of acquiring an initial value of a pressure signal that is obtained after reception, by a receiving unit, of an elasticity wave propagating from a measuring object;
• an impulse response initialization step of acquiring an initial value of an impulse response of the receiving unit;
• an output step of outputting a modified pressure signal based on the initial value of the pressure signal and the initial value of the impulse response,
• wherein said output step includes generating the modified pressure signal by executing the following steps iteratively according to a predetermined condition;
• a signal modifying step of modifying the pressure signal in use of the impulse response;
• a signal constraining step of modifying the pressure signal based on constraint conditions, wherein the constraint conditions include at least one of high contrast properties, positivity, and frequency band characteristics;
• an impulse response modifying step of modifying the impulse response in use of the pressure signal;
• and
• an impulse response constraining step of modifying the impulse response based on constraint conditions which are time-bandwidth characteristics of the impulse response.