Patent ID: 9204011
Filing Date: 2015-12-01
Classification: G06K,G06T,H04N

Abstract:
1. An apparatus for extracting a background luminance map of an image, comprising: a luminance extracting unit, configured to extract luminance values in the image to obtain a luminance map; a separating unit, configured to separate background from foreground of the image based on the luminance map, to obtain an initial background luminance map; a top and bottom luminance obtaining unit, configured to extract values of a top row and a bottom row of the initial background luminance map as top luminance and bottom luminance respectively, and in a case of a part of one of and both of the top luminance and the bottom luminance being missing, to supplement a missing part utilizing existing data of one of and both of the top luminance and the bottom luminance to obtain a complete top luminance and bottom luminance; and an interpolation unit, configured to perform interpolation on the image based on the complete top luminance and bottom luminance obtained by the top and bottom luminance obtaining unit, to obtain the background luminance map of the image.