Method and system for enhancing portrait images
First Claim
1. A method for enhancing the skin texture of a face appearing in a digital image, said method comprising the steps of:
- (a) generating a luminance image from the digital image;
(b) using a valley/peak detector to detect skin features in the luminance image;
(c) classifying the skin features according to their feature-based characteristics;
(d) selecting relevant skin features for modification;
(e) modifying the relevant skin features using an adaptive interpolation procedure, thereby producing a modified image; and
(f) blending the digital image and the modified image to produce an enhanced image.
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Accused Products
Abstract
A retouching method for enhancing an appearance of a face located in a digital image involves acquiring a digital image containing one or more faces and detecting a location of facial feature points in the faces, where the facial feature points include points identifying salient features such as skin, eyes, eyebrows, nose, mouth, and hair. The location of the facial feature points are used to segment the face into different regions such as skin, eyes, eyebrows, nose, mouth, neck and hair regions. Facially relevant characteristics of the different regions are determined and, based on these facially relevant characteristics, an ensemble of enhancement filters are selected, each customized especially for a particular region, and the default parameters for the enhancement filters are selected. The enhancement filters are then executed on the particular regions, thereby producing an enhanced digital image from the digital image.
112 Citations
61 Claims
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1. A method for enhancing the skin texture of a face appearing in a digital image, said method comprising the steps of:
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(a) generating a luminance image from the digital image; (b) using a valley/peak detector to detect skin features in the luminance image; (c) classifying the skin features according to their feature-based characteristics; (d) selecting relevant skin features for modification; (e) modifying the relevant skin features using an adaptive interpolation procedure, thereby producing a modified image; and (f) blending the digital image and the modified image to produce an enhanced image. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A method for enhancing the skin tone of a face appearing in a digital image, said method comprising the steps of:
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(a) generating a blurred version of the digital image; (b) generating a blending coefficient; and (c) applying a blending operation to the digital image and its blurred version to generate an enhanced image with improved skin tone, wherein the blending operation uses the blending coefficient to combine the digital image and its blurred version; wherein the blending coefficient is generated from a shadow/highlight strength image obtained from the digital image, said shadow/highlight strength image having a shadow/highlight strength value for each pixel of said digital image, and wherein the blending operation uses the blending coefficient to adaptively combine the digital image and its blurred version.
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19. A method for enhancing the skin tone of a face appearing in a digital image, said method comprising the steps of:
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(a) generating a blurred version of the digital image; (b) generating a blending coefficient; and (c) applying a blending operation to the digital image and its blurred version to generate an enhanced image with improved skin tone, wherein the blending operation uses the blending coefficient to combine the digital image and its blurred version; wherein the blending coefficient is generated from a shadow/highlight strength image obtained from the digital image, and wherein the blending operation uses the blending coefficient to adaptively combine the digital image and its blurred version; and wherein the step (b) of generating a blending coefficient comprises the steps of generating a luminance image from the digital image, generating an average luminance image from the luminance image, and subtracting the average luminance image from the luminance, image to generate a shadow/highlight image. - View Dependent Claims (20, 21)
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22. A method for enhancing the skin texture of a face appearing in a digital image, said method comprising the steps of:
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generating a luminance image from the digital image; using a valley/peak detector to detect a plurality of skin features in said luminance image; classifying said skin features according to feature-based characteristics; modifying one or more of said skin features using an adaptive interpolation procedure to produce a modified image; and blending the digital image and said modified image to produce an enhanced image. - View Dependent Claims (23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37)
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38. A system for enhancing the skin texture of a face appearing in a digital image, said system comprising:
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means for generating a luminance image from the digital image; means for using a valley/peak detector to detect a plurality of skin features in said luminance image; means for classifying said skin features according to feature-based characteristics; means for modifying one or more of said skin features using an adaptive interpolation procedure to produce a modified image; and means for blending the digital image and said modified image to produce an enhanced image. - View Dependent Claims (39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52)
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53. A method for enhancing the skin tone of a face in a digital image, said method comprising the steps of:
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generating a blurred version of the digital image; generating a blending coefficient; and blending the digital image and said blurred version using said blending coefficient; said method further comprising; obtaining a shadow/highlight strength image from the digital image, said shadow/highlight strength image having a shadow/highlight strength value for each pixel of said digital image; and generating said blending coefficient from said shadow/highlight strength image.
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54. A method for enhancing the skin tone of a face in a digital image, said method comprising the steps of:
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generating a blurred version of the digital image; generating a blending coefficient; and blending the digital image and said blurred version using said blending coefficient; said method further comprising; obtaining a shadow/highlight strength image from the digital image; and generating said blending coefficient from said shadow/highlight strength image; wherein said obtaining further comprises; generating a luminance image from the digital image; generating an average luminance image from said luminance image; and subtracting said average luminance image from said luminance image to generate said shadow/highlight strength image. - View Dependent Claims (55, 56, 57)
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58. A system for enhancing the skin tone of a face in a digital image, said system comprising:
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means for generating a blurred version of the digital image; means for generating a blending coefficient; and means for blending the digital image and said blurred version using said blending coefficient; said system further comprising; means for obtaining a shadow/highlight strength image from the digital image, said shadow/highlight strength image having a shadow/highlight strength value for each pixel of said digital image; and means for generating said blending coefficient from said shadow/highlight strength image. - View Dependent Claims (60, 61)
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59. A system for enhancing the skin tone of a face in a digital image, said system comprising:
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means for generating a blurred version of the digital image; means for generating a blending coefficient; and means for blending the digital image and said blurred version using said blending coefficient, further comprising; means for obtaining a shadow/highlight strength image from the digital image; and means for generating said blending coefficient from said shadow/highlight strength image; wherein said means for obtaining further comprises; means for generating a luminance image from the digital image; means for generating an average luminance image from said luminance image; and means for subtracting said average luminance image from said luminance image to generate said shadow/highlight strength image.
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Specification