| 摘要 |
<P>PROBLEM TO BE SOLVED: To correct a person image photographed under backlight to an image with sufficient visibility. <P>SOLUTION: A face detection section 1 detects presence or absence and a position of a face from an input image or a reduced image of the input image. A parameter calculation control section 2 controls a calculation method of a correction parameter in accordance with presence or absence of the face. When the face is detected, a face region correction parameter calculation section 3 calculates the correction parameter having a characteristic to correct the image to be darker as a representative luminance value is higher and to be brighter as the value is lower on the basis of a boundary luminance level which is previously determined in a luminance value with which a color of the skin is preferably displayed in response to the representative luminance value calculated from a center region of the detected face. When the face is not detected, a standard correction parameter calculation section 4 calculates the correction parameter on the basis of image data of the input image or the reduced image of the input image irrespective of an image content. An image conversion section 5 corrects gradation by converting a pixel value of the input image by using the obtained correction parameter. <P>COPYRIGHT: (C)2013,JPO&INPIT |
