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# A Method and Apparatus of Fast Trademark Candidate Localization in Stream Media

IP.com Disclosure Number: IPCOM000196566D
Publication Date: 2010-Jun-07
Document File: 2 page(s) / 103K

## Publishing Venue

The IP.com Prior Art Database

## Abstract

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A Method and Apparatus of Fast Trademark Candidate Localization in Stream Media

Architecture (Fig 1):

Followings are the key components and their functions in this method:

Fig.1. The whole process of the invention.

Gappy Frame Differential (Fig.2)

A component to create the differential between adjacent frames and gappy frames.

Fig.2. Gappy frame differential.

Implementation details:
Given a stream media V , the gappy differential '

V can be computed as follows:

n

F

(

k

)

=

(

f

(

k

)

f

(

k

i

))

i

=

1

Where n is the length of gappy window, )

f is a frame of V , )

(*

F is the corresponding frame of '

V . k is the

(*

subscript of frames.

Still Region Detection (Fig.3)

A component to detect the still regions in stream media V .

Implementation details
First, we detect the zeros in gappy frame differential. If most pixels in a region are zeros, we expect this region which stays unchanged in a time window is a still region. Second, a typical frame in the time window is chosen, and this still region can be represented as corresponding part of this typical frame.

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Fig.3 Still region detection.

Still Region Entropy

A component to calculate the entropy of the still region thus filter out some false positives. Implementation details
This can be done by calculating the variance of the still region.

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