US 9,811,715 B2
Image generator and image generation method
Shun Sakai, Shiga (JP)
Assigned to OMRON Corporation, Kyoto (JP)
Filed by OMRON Corporation, Kyoto-shi, Kyoto (JP)
Filed on Aug. 17, 2015, as Appl. No. 14/827,896.
Claims priority of application No. 2015-046008 (JP), filed on Mar. 9, 2015.
Prior Publication US 2016/0267318 A1, Sep. 15, 2016
Int. Cl. G06K 9/00 (2006.01); G06T 5/00 (2006.01); H04N 5/202 (2006.01); H04N 1/56 (2006.01); G06K 9/46 (2006.01); H04N 5/235 (2006.01); H04N 9/64 (2006.01)
CPC G06K 9/00228 (2013.01) [G06K 9/4661 (2013.01); G06T 5/009 (2013.01); H04N 1/56 (2013.01); H04N 5/202 (2013.01); H04N 5/2351 (2013.01); H04N 9/64 (2013.01); G09G 2320/0673 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A non-transitory computer readable medium comprising a program executable on a computer to generate a face detecting image used in face detection processing of detecting a face from a photographed image, the program causing the computer to perform:
calculating a representative luminance value representing a luminance value of each pixel of the photographed image obtained by photographing;
determining whether the representative luminance value is greater than or equal to a predetermined threshold; and
generating the face detecting image by performing gamma conversion processing on the photographed image,
wherein the luminance value of each pixel of the photographed image is converted using a predetermined gamma value,
wherein the gamma conversion processing is performed using a first gamma value to obtain a first face detecting image, when the representative luminance value that is calculated is greater than or equal to the predetermined threshold,
wherein the gamma conversion processing is performed using a second gamma value to obtain a second face detecting image when the representative luminance value is less than the predetermined threshold,
wherein the second face detecting image is lighter than the first face detecting image, and
wherein the predetermined threshold is larger than 0.25 and smaller than 0.41 when a possible representative luminance value ranges from 0 to 1.