Convert ArrayPlot Data to Matrix

 Convert ArrayPlot Data to Matrix

I might have made a mistake here. Suppose I have spent a long time doing a calculation for an array plot as follows:

ArrayPlot[
 ParallelTable[
  abc[15, 1, K, n], {K, 1, 400}, {n, 1, 400}]]

Where abc is just some function that takes a while to evaluate for large K and n. Now, once the computation finished, all of the information is there, visually. But suppose I want to keep all of the data (actual numerical values) in some kind of external file. Is there any way to do this after the fact? Or is the only way to get those numbers to go back, re-compute every value again in a table, and then export that table to a .hdf file?

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