Systems and methods for analyzing a motion based on images

A system for determining posture-related information of a subject using the subject's image, the system comprises:

• a memory that stores a set of instructions;
• and
• a hardware processor configured to execute the set of instructions to:
• receive a first image of a subject in a first posture;
• determine, from the first image, first positions of a first pair of joints;
• determine, from the first positions, a first body segment length of a first body segment associated with the first pair of joints;
• receive a second image of the subject in a second posture;
• determine, from the second image, second positions of a second pair of joints;
• determine, from the second positions, a second body segment length of a second body segment associated with the second pair of joints;
• determine, based on a relationship between the first and second body segment lengths, whether the first and second pairs of joints correspond to a pair of joints of the subject;
• If the first and second pairs of joints are determined to correspond to a pair of joints of the subject, determine, based on the second positions, information of a posture of the subject;
• and
• provide an indication regarding information associated with the posture of the subject.

A non-transistory computer readable medium storing instructions that are executable by one or more processors to cause the one or more processors to execute a method of determining posture-related information of a subject using the subject's image, the method comprising:

• receiving a first image of a subject in a first posture;
• determining, from the first image, first positions of a first pair of joints;
• determining, from the first positions, a first body segment length of a first body segment associated with the first pair of joints;
• receiving a second image of the subject in a second posture;
• determining, from the second image, second positions of a second pair of joints;
• determining, from the second positions, a second body segment length of a second body segment associated with the second pair of joints;
• determining, based on a relationship between the first and second body segment lengths, whether the first and second pairs of joints correspond to a pair of joints of the subject;
• If the first and second pairs of joints are determined to correspond to a pair of joints of the subject, determining, based on the second positions, information of a posture of the subject;
• and
• providing an indication regarding the information of a posture of the subject.