US 9,813,630 B1
Picture brightness adjusted motion detection
Elliot N. Linzer, Bergenfield, NY (US)
Assigned to Ambarella, Inc., Santa Clara, CA (US)
Filed by Ambarella, Inc., Santa Clara, CA (US)
Filed on Jun. 8, 2015, as Appl. No. 14/732,968.
Int. Cl. H04N 5/14 (2006.01); G06K 9/46 (2006.01); H04N 5/235 (2006.01); H04N 9/77 (2006.01); H04N 5/202 (2006.01); H04N 9/69 (2006.01)
CPC H04N 5/235 (2013.01) [G06K 9/4652 (2013.01); H04N 5/144 (2013.01); H04N 5/202 (2013.01); H04N 5/2351 (2013.01); H04N 9/69 (2013.01); H04N 9/77 (2013.01)] 20 Claims
OG exemplary drawing
 
12. A method of performing motion detection comprising:
receiving a sequence of pictures;
determining a first picture brightness value representing an overall brightness of a reference picture selected from said sequence of pictures and a second picture brightness value representing an overall brightness of a target picture selected from said sequence of pictures;
selecting at least one of said reference picture or said target picture based upon the first and the second picture brightness values;
generating a brightness change factor based on one or more of gain information for said reference picture, gain information for said target picture, an average pixel value for said reference picture, and an average pixel value for said target picture;
remapping image data of the selected picture by calculating new pixel values using original pixel values of the selected picture and said brightness change factor; and
performing said motion detection between said reference picture and said target picture based upon the remapped image data of the at least one of said reference picture and said target picture and original image data of the picture that was not remapped.