Image processing apparatus, method of controlling the same, and storage medium

A control method of an image processing apparatus, the control method comprising:

• calculating an impact of an image, detecting a candidate region for a region of interest in the image based on the impact, and setting the detected candidate region as a first region that is part of the image;
• calculating a first feature amount relating to luminance components in each of the first region and a second region that is a different part of the image to the first region, and a second feature amount relating to color components in each of the first region and the second region;
• calculating a strength of color in the first region in the image;
• calculating an interest level for the first region based on a difference for the first feature amount between the first region and the second region, a difference for the second feature amount between the first region and the second region, and an importance for each of the differences in the first and second feature amounts, wherein the importance for the difference for the first feature amount and the importance for the difference for the second feature amount is determined based on the strength of color;
• detecting the region of interest in the image by using the interest level.

A non-transitory computer-readable storage medium storing a program for causing a computer to execute a control method of an image processing apparatus, the control method comprising:

• calculating an impact of an image, detecting a candidate region for a region of interest in the image based on the impact, and setting the detected candidate region as a first region that is part of the image;
• calculating a first feature amount relating to luminance components in each of the first region and a second region that is a different part of the image to the first region, and a second feature amount relating to color components in each of the first region and the second region;
• calculating a strength of color in the first region in the image;
• calculating an interest level for the first region based on a difference for the first feature amount between the first region and the second region, a difference for the second feature amount between the first region and the second region, and an importance for each of the differences in the first and second feature amounts, wherein the importance for the difference for the first feature amount and the importance for the difference for the second feature amount is determined based on the strength of color;
• detecting the region of interest in the image by using the interest level.

An image processing apparatus comprising:

• a memory configured to store instructions;
• and
• a processor connected to the memory and configured to execute the instructions to:
• determine an index of a region of an image using a difference between a feature amount of an inner region for the region and a feature amount of a surrounding region for the region, the feature amount including at least one of a pixel value average;
• a histogram indicating a pixel value distribution and an edge amount, detect at least one region among the regions of the image on the index as a candidate region of interest in the image, and set the detected candidate region as a first region that is part of the image;
• determine a first feature amount relating to luminance components in each of the first region and a second region that is a different part of the image to the first region, and a second feature amount relating to color components in each of the first region and the second region;
• determine a strength of color in the first region in the image;
• determine an interest level for the first region based on a difference for the first feature amount between the first region and the second region, a difference for the second feature amount between the first region and the second region, and an importance for each of the differences in the first and second feature amounts, wherein the importance for the difference for the first feature amount and the importance for the difference for the second feature amount is determined based on the strength of color;
• and
• detect a region of interest among the candidate region of interest in the image by using the interest level.

A control method of an image processing apparatus, the control method comprising:

• determining an index of a region of an image using a difference between a feature amount of an inner region and a feature amount of a surrounding region for the region, the feature amount including at least one of a pixel value average, a histogram indicating a pixel value distribution and an edge amount;
• detecting at least one region among the regions of the image based on the index as a candidate region of interest in the image;
• setting the detected candidate region as a first region that is part of the image;
• determining a first feature amount relating to luminance components in each of the first region and a second region that is a different part of the image to the first region;
• determining a second feature amount relating to color components in each of the first region and the second region;
• determining a strength of color in the first region in the image;
• determining an interest level for the first region based on a difference for the first feature amount between the first region and the second region, a difference for the second feature amount between the first region and the second region, and an importance for each of the differences in the first and second feature amounts, wherein the importance for the difference for the first feature amount and the importance for the difference for the second feature amount is determined based on the strength of color;
• and
• detecting a region of interest among the candidate region of interest in the image by using the interest level.

A non-transitory computer-readable storage medium storing a program for causing a computer to execute a control method of an image processing apparatus, the control method comprising:

• determining an index of an image using a difference between a feature amount of an inner region for the region and a feature amount of a surrounding region for the region, the feature amount including at least one of a pixel value average, a histogram indicating a pixel value distribution and an edge amount;
• detecting at least one region among the regions of the image based on the index as a candidate region of interest in the image;
• setting the detected candidate region as a first region that is part of the image;
• determining a first feature amount relating to luminance components in each of the first region and a second region that is a different part of the image to the first region;
• determining a second feature amount relating to color components in each of the first region and the second region;
• determining a strength of color in the first region in the image;
• determining an interest level for the first region based on a difference for the first feature amount between the first region and the second region, a difference for the second feature amount between the first region and the second region, and an importance for each of the differences in the first and second feature amounts, wherein the importance for the difference for the first feature amount and the importance for the difference for the second feature amount is determined based on the strength of color;
• and
• detecting a region of interest among the candidate region of interest in the image by using the interest level.