Changes between Version 17 and Version 18 of staticsky.20120706_excess_detections
- Timestamp:
- Mar 4, 2013, 6:32:19 PM (13 years ago)
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staticsky.20120706_excess_detections
v17 v18 30 30 Manually running this example stack has clarified what the issue with the variance is. Bill was correct, it is a result of the matching chi2 and the additional variance term. Here are the fwhm, chi2, additional variance values for each unrejected input, along with the input pixel values of both the warp and variance for two positions: (972,3213) is in the "good region," where the measured stack image variance matches the value in the variance image; (884, 3265) is in the "bad region," where the observed variance is large. 31 31 32 || Input || FWHM ||chi^2 || Additional variance || (972,3213) || V(972,3213) || (884,3265) || V(884,3265) || median(V) || weight || covarFactor||32 || Input || FWHM ||chi^2 || Additional variance || (972,3213) || V(972,3213) || (884,3265) || V(884,3265) || directMedian(V) || weight || covarFactor || quotedMedian || 33 33 || 0 || 5.332783||5395.50|| 4787.18 || || || || || 177.457 || 3.54363e-05 || 1 ||28139 || 34 34 || 2 || 5.689657||5374.62|| 4282.85 || || || || || 187.196 || 3.43272e-05 || 1 || 29215.4 ||
