Oversampling & high ISO noise test?

[AaronEzra]

I started with mirrorless video a year and a half ago and I'm still learning how it works.
Recent discussions about new cameras and image quality got me wondering about
how much oversampling cleans up noise in high ISO shots. Especially in Super35.

So I shot this test on my X-T3, ISO 25600, 18-55 zoom at f8 on tripod from the same position. Varied shutter for exposure. Samples straight from camera without any grading. (First time I ever shot at this high ISO!) Natural room light from windows with Sunlight white balance.

First - actual size crop from a “FINE” JPG photo at 6240 x 3512 for a 1:1 (not oversampled) comparison. Eterna profile with boosted color, noise reduction -4 and sharpness -4, lowest.

[Jay60p]

I think you meant to reply to my post:

https://www.eoshd.com/comments/topic/46429-oversampling-high-iso-noise-test/

...and started a “new topic” instead of a “reply to this topic” ?

[AaronEzra]

On 9/8/2020 at 8:55 PM, AaronEzra said:

I started with mirrorless video a year and a half ago and I'm still learning how it works.
Recent discussions about new cameras and image quality got me wondering about
how much oversampling cleans up noise in high ISO shots. Especially in Super35.

So I shot this test on my X-T3, ISO 25600, 18-55 zoom at f8 on tripod from the same position. Varied shutter for exposure. Samples straight from camera without any grading. (First time I ever shot at this high ISO!) Natural room light from windows with Sunlight white balance.

First - actual size crop from a “FINE” JPG photo at 6240 x 3512 for a 1:1 (not oversampled) comparison. Eterna profile with boosted color, noise reduction -4 and sharpness -4, lowest.usps tracking showbox speed test

According to articles posted by RSNA, 71% sensitivity for the SARS-CoV-2 RT-PCR Test. This is the test being doled out by various governments. I would venture to say that the CDC test is even less sensitive than in other countries given reports about serial testing. Each government appears to be using different RT-PCR tests with different primer sets. The SARS-CoV-2 test is highly specific, I would venture to guess around 98% or higher with the thresholds they are using. CT has very low specificity for COVID-19 vs other types of viral pneumonia, but high sensitivity for detecting viral pneumonia. Basically, no one should hang their hat on using one test either CT or RT-PCR.

[BTM_Pix]

25 minutes ago, AaronEzra said:

According to articles posted by RSNA, 71% sensitivity for the SARS-CoV-2 RT-PCR Test. This is the test being doled out by various governments. I would venture to say that the CDC test is even less sensitive than in other countries given reports about serial testing. Each government appears to be using different RT-PCR tests with different primer sets. The SARS-CoV-2 test is highly specific, I would venture to guess around 98% or higher with the thresholds they are using. CT has very low specificity for COVID-19 vs other types of viral pneumonia, but high sensitivity for detecting viral pneumonia. Basically, no one should hang their hat on using one test either CT or RT-PCR.

Dickhead.