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catchpoint / WebPageTest.visual-metrics

Calculate visual performance metrics from a video (Speed Index, Visual Complete, Incremental progress, etc)
BSD 3-Clause "New" or "Revised" License
153 stars 46 forks source link

changed psi caculation #16

Closed Clark-Q-Gao closed 8 years ago

Clark-Q-Gao commented 8 years ago

Changed the order of updating SSIM in PSI function. The first SSIM number should be zero before calculating the first PSI, then update the first SSIM to get the second PSI and so on.