Quote:
Originally Posted by nji
Think of the numbers as the "characteristic values" of the frames they stand for.
The question is how the deduping algorithms define "sequence of similar":
Are the neighboured frames compared, or is the first frame of the sequence
the reference to compare the others to?
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They usually compare similarity characteristics either difference from previous, or difference to next. Usually only small areas are sampled, not entire frame for speed purposes . The "%" value is what is used for the threshold
As mentioned earlier, for dedup it's only directly adjacent frame
Position
10 difference from 11
11 difference from 12
.
.
.
An example from a log looks like this
Code:
frm 22: diff from frm 23 = 2.1809% at (160,352)
frm 23: diff from frm 24 = 3.5938% at (256,448)
frm 24: diff from frm 25 = 2.9563% at (128,352)
frm 25: diff from frm 26 = 3.1458% at (160,352)
frm 26: diff from frm 27 = 3.4811% at (256,448)
frm 27: diff from frm 28 = 0.2851% at (416,256)
frm 28: diff from frm 29 = 3.4487% at (256,448)