US Patent No. 10,169,655

DETECTION OF LOGOS IN A SEQUENCE OF VIDEO FRAMES


Patent No. 10,169,655
Issue Date January 01, 2019
Title Detection Of Logos In A Sequence Of Video Frames
Inventorship Renxiang Li, Lake Zurich, IL (US)
Faisal Ishtiaq, Plainfield, IL (US)
Assignee ARRIS Enterprises LLC, Suwanee, GA (US)

Claim of US Patent No. 10,169,655

1. One or more computer-readable storage media containing instructions which, when executed by the one or more processors performs a method, comprising:buffering N frames of a video program, where N?2;
calculating an absolute difference frame D(n,k) between a first subsequent frame n and each of the buffered frames k by determining an absolute value of a difference between pixel values for corresponding pixels in at least a portion of the first subsequent frame n and each of the buffered frames k;
generating a histogram H(n,k) for each absolute difference frame;
for each histogram H(n,k) calculating a weight w(n,k) based on a distribution in the histogram of the absolute value of the difference between pixel values;
repeating the calculating of the absolute difference frame, the histograms and the weights for at least a second subsequent frame n;
generating an accumulation difference frame A, where
andidentifying a region in the accumulation difference frame as a static graphical logo if an average value of the absolute value of the pixels in the identified region of the accumulation difference frame is below a threshold value.