Image processing device, image processing method and computer readable product

An image processing method comprising:

• determining, whether or not a state of a face image included in an image at one time out of images obtained at a plurality of different times is a ready state that satisfies a condition for performing three-dimensionality determination;
• determining, whether or not a state of a face image included in an image at different time from the image at the one time is an initiation state changed from the ready state;
• and
• performing, the three-dimensionality determination on the face images included in the images when it is determined that the state is the initiation state.

A computer program product comprising a computer readable medium including programmed instructions, wherein the instructions, when executed by a computer, cause the computer to perform:

• determining whether or not a state of a face image included in an image at one time out of images obtained at a plurality of different times is a ready state that satisfies a condition for performing three-dimensionality determination;
• determining whether or not a state of a face image included in an image at different time from the image at the one time is an initiation state changed from the ready state;
• and
• performing the three-dimensionality determination on the face images included in the images when it is determined that the state is the initiation state.