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Dissolves/Fade to white? #143
Description
Does PySceneDetect have a problem when a image dissolves or fades into white?
I was using the code provided in the python example usage: https://pyscenedetect.readthedocs.io/en/latest/examples/usage-python/
The intro started with a fade-in to white and ended with a fade-out from white. This was never detected and the whole scene was missed.
Any advice on how to better detect dissolves?
Activity
wjs018 commentedon Jan 24, 2020
Slow dissolves in general are not well suited to being detected using the
detect-contentmethod. That method works by looking for abrupt changes in the HSV colorspace above a certain threshold. There have been discussions in the past about how to best detect dissolves and fades before, #62 for example.You might try using
detect-thresholdif you know you are always going to looking for fades to/from a pure white and see what your results look like there.jihh commentedon Nov 17, 2022
I think
ThresholdDetectorshould add a switch.For blackframe, use
if frame_avg < self.threshold:.For whiteframe, use
if frame_avg > self.threshold:.[feature] Add fade to white detection for ThresholdDetector. #143
Breakthrough commentedon Feb 12, 2023
For v0.6.2 you can specify if you want to use either methods with ThresholdDetector, and can also have both by combining two instances of ThresholdDetector each using the other method.