Thresholding

Using two different quiet sun images and a threshold of 150 gauss, no more than 0.15% of the quiet sun is picked up.

Quiet Sun region 1

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Quiet Sun region 2

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Histogram region 1

threshh1

Histogram region 2

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This appears to pick up the Active Region quite well

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One response to “Thresholding”

  1. Peter Gallagher says :

    Looks good to me. Let’s go with a threshold of 150G.

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