Why does 'imwrite' not preserve transparency in animated GIFs?

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MathWorks Support Team
回答： MathWorks Support Team 2019-3-21
When creating an animated GIF using the 'imwrite' function, previous frames are not cleared. How do I clear them?

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MathWorks Support Team
To make sure that previous frames are cleared, set pass the Option-Value pair ('DisposalMethod','restoreBG') to the 'imwrite' function.
An example with a reproduction of the issue and a solution is shown in the attached script.

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