feat: add image callback in sampling

[hanxiao]

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[codecov]

Codecov Report

❗ No coverage uploaded for pull request base (main@4738bc0). Click here to learn what that means.
The diff coverage is n/a.

@@           Coverage Diff           @@
##             main     #140   +/-   ##
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  Coverage        ?   67.03%           
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  Files           ?       17           
  Lines           ?     1098           
  Branches        ?        0           
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  Hits            ?      736           
  Misses          ?      362           
  Partials        ?        0           

Flag	Coverage Δ
discoart	67.03% <0.00%> (?)

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