The detection of fades or dissolves is based once again on the
establishment of a similarity criterion between two successive frames (a
distance in a specific color space for example). The temporal evolution
of the criterion leads to a 1D-signal which presents
small hills at the dissolve positions. These hills are still extracted by
morphological filtering, but this time it is applied hierarchically on the
curves. One obtains therefore the following information : the beginning frame of
the dissolve, its last frame and its duration.
To see an example of a dissolve detected by this technique,click here.
Criterion evolution curve
Sequence nantes (5hz) - CopyrightCMM/ENSMP.
We present successively the key frames from the cut detection and the key frames from the dissolve detection. Let us underline the dissolve extration (shot #5) between frames #26 and #29 of the sequence.