> >I believe logo detection catches this. > > > > > Does it specifically catch the brief presence of the logo? > > On most stations I've seen that have a logo, the logo disappears during > the commercial and reappears just after it ends.
Logo detection starts by searching short sections of video at specific intervals through the video looking for a logo. If it finds commonalities between the sections and what looks like a logo, the logo information is recorded. Then when the normal flagging process goes through frame-by-frame, the previously detected logo information is used to determine if a logo is present on the current frame. If a logo is present, that frame is flagged as having a logo. Later the code does some analysis looking at the frames with logos to help determine when commercials start/stop, so Yes, it does try to detect when logos disappear and reappear around a commercial break. -- Chris
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