Color balance correction based on skin color and highlight color
First Claim
1. An image processing apparatus comprising:
- a first acquisition unit which acquires a color of an object in image data;
a second acquisition unit which acquires a highlight color in the image data based on an analysis result of luminance components in the image data; and
a correction unit which corrects, in a case where a distance between the highlight color and the color of the object is equal to or larger than a predetermined distance on a color plane, the highlight color in the image data so that a correction amount of the highlight color becomes larger as the distance becomes longer.
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Abstract
An image processing apparatus for applying a color balance correction to input image data, comprises a detection unit which detects an object included in the image data; an object color calculation unit which calculates an object color as a color of the object; an acquisition unit which acquires a highlight color in the image data; a calculation unit which calculates a correction value for the object color and the highlight color based on a relative positional relationship between the object color and the highlight color on a color space; and a color balance correction unit which applies the color balance correction to the highlight color and the object color using the correction value.
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Citations
17 Claims
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1. An image processing apparatus comprising:
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a first acquisition unit which acquires a color of an object in image data; a second acquisition unit which acquires a highlight color in the image data based on an analysis result of luminance components in the image data; and a correction unit which corrects, in a case where a distance between the highlight color and the color of the object is equal to or larger than a predetermined distance on a color plane, the highlight color in the image data so that a correction amount of the highlight color becomes larger as the distance becomes longer. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. An image processing method comprising:
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a first acquisition step of acquiring a color of an object in image data; a second acquisition step of acquiring a highlight color in the image data based on an analysis result of luminance components in the image data; and a correction step of correcting, in a case where a distance between the highlight color and the color of the object is equal to or larger than a predetermined distance on a color plane, the highlight color in the image data so that a correction amount of the highlight color becomes larger as the distance becomes longer.
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10. An image processing apparatus comprising:
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a calculation unit which calculates an object color of an object included in the image data; a detection unit which detects a highlight color of the image data; a reliability calculation unit which calculates a reliability for a value of the object color calculated by said calculation unit and a reliability for a value of the highlight color acquired by said acquisition unit based on a relative positional relationship between the object color and the highlight color on a color space, and differences between the object color and the highlight color, and reference values; and a color balance correction unit which applies the color balance correction to the object color and the highlight color by controlling a correction amount for the object color and the highlight color using the reliability for the value of the object color and the reliability for the value of the highlight color. - View Dependent Claims (11, 12, 13, 14, 15, 16)
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17. An image processing method comprising:
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a calculation step of calculating an object color of an object included in image data; a detection step of detecting a highlight color of the image data; a reliability calculation step of calculating a reliability for a value of the object color calculated in the calculation step and a reliability for a value of the highlight color acquired in the acquisition step based on a relative positional relationship between the object color and the highlight color on a color space, and differences between the object color and the highlight color, and reference values; and a color balance correction step of applying the color balance correction to the object color and the highlight color by controlling a correction amount for the object color and the highlight color using the reliability for the value of the object color and the reliability for the value of the highlight color.
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Specification