Systems and methods for determining target event

A system, comprising:

• at least one storage device including a set of instructions;
• and
• at least one processor in communication with the at least one storage device, wherein when executing the set of instructions, the at least one processor is directed to cause the system to perform operations including:
• obtaining a first image including a first subject and information related to the first subject;
• determining, based on the first image and the information related to the first subject, a second image including the first subject, wherein the second image is captured no later than the first image;
• determining, based on the second image, a third image, wherein the third image is captured later than the second image;
• determining whether the third image includes the first subject based on the information related to the first subject;
• and
• in response to determining that the third image includes the first subject, determining that the first subject is a target subject.

A method, implemented on a computing device having at least one processor and at least one storage device, the method comprising:

• obtaining a first image including a first subject and information related to the first subject;
• determining, based on the first image and the information related to the first subject, a second image including the first subject, wherein the second image is captured no later than the first image;
• determining, based on the second image, a third image including a second subject, wherein the first subject is associated with the second subject;
• determining a background image which does not include the first subject;
• and
• determining a target event based on the background image, the second image, and the third image.