Image processing method, image processing apparatus, and computer-readable recording medium storing image processing program
First Claim
1. An image processing method comprising the steps of:
- obtaining a weighting parameter for a statistical characteristic quantity representing a degree of sharpness in a predetermined structure in an input image by fitting a model representing the structure to the structure in the input image, the model obtained by carrying out predetermined statistical processing on a plurality of images representing the predetermined structure in different degrees of sharpness, and the model representing the structure by one or more statistical characteristic quantities including the statistical characteristic quantity representing the degree of sharpness and by weighting parameter or parameters for weighting the statistical characteristic quantity or quantities according to an individual characteristic of the structure; and
adjusting sharpness in at least a part of in the input image according to a value of the obtained weighting parameter.
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Abstract
Sharpness is adjusted for more appropriately representing a predetermined structure in an image. A parameter acquisition unit obtains a weighting parameter for a principal component representing a degree of sharpness in a face region detected by a face detection unit as an example of the predetermined structure in the image, by fitting to the face region a mathematical model generated by a statistical method such as AAM based on a plurality of sample images representing human faces in different degrees of sharpness. Based on a value of the parameter, sharpness is adjusted in at least a part of the image. For example, a parameter changing unit changes the value of the parameter to a preset optimal face sharpness value, and an image reconstruction unit reconstructs the image based on the parameter having been changed and outputs the image having been subjected to the sharpness adjustment processing.
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Citations
12 Claims
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1. An image processing method comprising the steps of:
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obtaining a weighting parameter for a statistical characteristic quantity representing a degree of sharpness in a predetermined structure in an input image by fitting a model representing the structure to the structure in the input image, the model obtained by carrying out predetermined statistical processing on a plurality of images representing the predetermined structure in different degrees of sharpness, and the model representing the structure by one or more statistical characteristic quantities including the statistical characteristic quantity representing the degree of sharpness and by weighting parameter or parameters for weighting the statistical characteristic quantity or quantities according to an individual characteristic of the structure; and
adjusting sharpness in at least a part of in the input image according to a value of the obtained weighting parameter.
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2. An image processing apparatus comprising:
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parameter acquisition means for obtaining a weighting parameter for a statistical characteristic quantity representing a degree of sharpness in a predetermined structure in an input image by fitting a model representing the structure to the structure in the input image, the model obtained by carrying out predetermined statistical processing on a plurality of images representing the predetermined structure in different degrees of sharpness, and the model representing the structure by one or more statistical characteristic quantities including the statistical characteristic quantity representing the degree of sharpness and by weighting parameter or parameters for weighting the statistical characteristic quantity or quantities according to an individual characteristic of the structure; and
sharpness adjustment means for carrying out sharpness adjustment in at least a part of the input image according to a value of the weighting parameter obtained by the parameter acquisition means. - View Dependent Claims (3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A computer-readable recording medium storing an image processing program causing a computer to function as:
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parameter acquisition means for obtaining a weighting parameter for a statistical characteristic quantity representing a degree of sharpness in a predetermined structure in an input image by fitting a model representing the structure to the structure in the input image, the model obtained by carrying out predetermined statistical processing on a plurality of images representing the predetermined structure in different degrees of sharpness, and the model representing the structure by one or more statistical characteristic quantities including the statistical characteristic quantity representing the degree of sharpness and by weighting parameter or parameters for weighting the statistical characteristic quantity or quantities according to an individual characteristic of the structure; and
sharpness adjustment means for adjusting sharpness in at least a part of the input image according to a value of the weighting parameter obtained by the parameter acquisition means.
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Specification