| 摘要 |
The present invention provides a technology for generating an image enabling high-accuracy face detection processing. An image generator (100) according to the present invention is configured to generate a face detecting image used in face detection processing, the image generator (100) includes: a representative luminance calculation unit (101) configured to calculate a representative luminance value representing a luminance value of each pixel of a photographed image obtained by a photographing device (200); and a gamma conversion unit (103) configured to generate the face detecting image by performing gamma conversion processing on the photographed image, the luminance value of each pixel of the image being converted using a predetermined gamma value. At this point, the gamma conversion unit (103) performs the gamma conversion processing using a first gamma value when the representative luminance value is greater than or equal to a predetermined threshold, and the gamma conversion unit performs the gamma conversion processing using a second gamma value when the representative luminance value is less than the predetermined threshold. A face detecting image lighter than the face detecting image obtained by using the first gamma value can be obtained by using the second gamma value. |
