Image processing apparatus and control method thereof

An image processing apparatus comprising one or more processors that function as:

• an area registration unit configured to register an image in a specific area of a first image included in a moving image as a reference area to be tracked;
• a setting unit configured to set a first feature amount based on the reference area and set a second feature amount which is obtained by expanding the first feature amount;
• and
• an identifying unit configured to identify an area having the highest degree of correlation with the reference area in a second image other than the first image,
• wherein the identifying unit identifies the area having the highest degree of correlation with the reference area using one of the first feature amount and the second feature amount, and
• wherein the setting unit sets both the first feature amount and the second feature amount based on hue information and saturation information in the reference area without using luminance information in the reference area.

A control method of an image processing apparatus comprising:

• an area registration step of registering an image in a specific area of a first image included in a moving image as a reference area to be tracked;
• a setting step of setting a first feature amount based on the reference area and setting a second feature amount which is obtained by expanding the first feature amount;
• a first identifying step of identifying an area having the highest degree of correlation with the reference area in a second image other than the first image;
• an updating step of updating the reference area using the area having the highest degree of correlation with the reference area identified in the identifying step;
• and
• a second identifying step of identifying an area having the highest degree of correlation with the updated reference area in a third image other than the first image and the second image,
• wherein the first identifying step identifies the area having the highest degree of correlation with the reference area using one of the first feature amount and the second feature amount.

A control method of an image processing apparatus comprising:

• an area registration step of registering an image in a specific area of a first image included in a moving image as a reference area to be tracked;
• a setting step of setting a first feature amount based on the reference area and setting a second feature amount which is obtained by expanding the first feature amount;
• and
• a first identifying step of identifying an area having the highest degree of correlation with the reference area in a second image other than the first image;
• wherein the identifying step identifies the area having the highest degree of correlation with the reference area using one of the first feature amount and the second feature amount, and
• wherein the setting step sets both the first feature amount and the second feature amount based on hue information and saturation information in the reference area without using luminance information in the reference area.