Current color correction base on cloud coverage will darken images #209
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Before change this line, our image looks below, it's too dark.

After change this line, seems color correction will have brighten result at area of land.

I suppose current cloud coverage based color correction could have some improvment. But I still not understand why minus 1/4 cloud will have such different result.
Just leave this pull request for reference these issues:
#66 , #128