Image processing apparatus, method of tracking a target object, and storage medium

A method of tracking a target object by estimating a position of the target object on each of a plurality of images, the method comprising:

• performing a first estimation process to estimate the position of the target object in at least one of the plurality of images;
• performing a second estimating process to estimate the position of the target object in at least one of the plurality of images, wherein estimating accuracy of the position of the target object in the second estimating process is lower than the estimating accuracy in the first estimation process;
• correcting the position of the target object estimated by the second estimation process on a second image of the plurality of the images, based on the position of the target object estimated by the first estimation process on a first image of the plurality of images, wherein the second image is an image captured at a different time from the first image;
• and
• determining a reliability of a tracking history composed of a plurality of positions estimated by the first estimation process or the second estimation process for the target object in each of the plurality of images.

A non-transitory computer-readable storage medium storing a program that, when executed by a computer, causes the computer to perform a method of tracking a target object by estimating a position of the target object on each of a plurality of images, the method comprising:

• performing a first estimation process to estimate the position of the target object in at least one of the plurality of images;
• performing a second estimating process to estimate the position of the target object in at least one of the plurality of images, wherein estimating accuracy of the position of the target object in the second estimating process is lower than the estimating accuracy in the first estimation process;
• correcting the position of the target object estimated by the second estimation process on a second image of the plurality of the images, based on the position of the target object estimated by the first estimation process on a first image of the plurality of images, wherein the second image is an image captured at a different time from the first image;
• and
• determining a reliability of a tracking history composed of a plurality of positions estimated by the first estimation process or the second estimation process for the target object in each of the plurality of images.