Information processing apparatus and control method thereof

An information processing apparatus, comprising:

• a memory;
• and
• a processor configured to use the memory and execute a process, the process comprising:
• converting voxel data to node data in which a voxel of the voxel data, which has a brightness value that is outside a certain brightness value range to be focused on, is set as a first node that represents that the brightness value of the voxel is outside the certain brightness value range, and a voxel of the voxel data, which has a brightness value that is within the certain brightness value range, is set as a second node that has a capability to extract relating nodes that are based on a neighborhood relationship between voxels;
• performing, for each second node included in the node data, a calculation processing to calculate an output value of a reaction-diffusion equation by using a value corresponding to a brightness value of the second node and values corresponding to brightness values of relating nodes extracted from the second node, a predetermined number of times;
• and
• determining a brightness value of each second node from the output value of the reaction-diffusion equation after performing the calculation processing the predetermined number of times.

A non-transitory computer-readable storage medium storing a program for causing a computer to execute a process, the process comprising:

• converting voxel data to node data in which a voxel of the voxel data, which has a brightness value that is outside a certain brightness value range to be focused on, is set as a first node that represents that the brightness value of the voxel is outside the certain brightness value range, and a voxel of the voxel data, which has a brightness value that is within the certain brightness value range, is set as a second node that has a capability to extract relating nodes that are based on a neighborhood relationship between voxels;
• performing, for each second node included in the node data, a calculation processing to calculate an output value of a reaction-diffusion equation by using a value corresponding to a brightness value of the second node and values corresponding to brightness values of relating nodes extracted from the second node, a predetermined number of times;
• and
• determining a brightness value of each second node from the output value of the reaction-diffusion equation after performing the calculation processing the predetermined number of times.