Forum

Pages: [1]   Go Down
  Print  
Author Topic: Shouldn't the normalised resolution (8MP) be raised?  (Read 2715 times)
duartix
Newbie
*
Offline Offline

Posts: 5


« on: October 04, 2011, 05:55:06 PM »

Cheers!

Due to the fact that most DLSR cameras today are going around the 16MP mark, doesn't the Print score get attenuated (between significantly different resolutions cameras) at so much lower (8MP) resolution?

Or am I talking complete nonsense?
Logged
Herve H
DxOMark technical team
Jr. Member
*****
Offline Offline

Posts: 97


« Reply #1 on: October 04, 2011, 08:28:05 PM »

Good question. Changing the normalized resolution would simply offset all metrics by a fixed amount so that wouldn't change the ratings.
Logged
hoodlum
Newbie
*
Offline Offline

Posts: 28


« Reply #2 on: October 04, 2011, 09:53:21 PM »

Also, the just announced Fujifilm X10 is able to output 6mp RAW files.
Logged
dosdan
Jr. Member
**
Offline Offline

Posts: 50



« Reply #3 on: October 07, 2011, 11:00:35 PM »

As Herve mentioned, changing the normalised value just moves all the normalised values up or down. The relative difference between them is still the same. The great thing about normalised/"Print" values is that they allow the comparison of different sensor MP values and formats when outputted to the same MP size, here 8MP.

For example compare the Pentax K-5, Canon 5DII & Pentax 645D cameras at the SNR 18% for both "Screen" (pixel level) & "Print" (normalised):

http://www.dxomark.com/index.php/Cameras/Compare-Camera-Sensors/Compare-cameras-side-by-side/%28appareil1%29/676|0/%28brand%29/Pentax/%28appareil2%29/668|0/%28brand2%29/Pentax/%28appareil3%29/483|0/%28brand3%29/Canon

While at the pixel level, they are close together, the normalised figures show the advantage of bigger sensor size.

Without the whiff of sanity that the normalisation brings to the discussion, we would have more people complaining that more MP, for the same sensor size, is always worse.

Another way of comparison is relative performance per unit area. This is what I effectively did in this message here (figures in stops with the Canon S90 used as the reference):

http://forum.dxomark.com/index.php/topic,412.msg641.html#msg641

This gives some idea of relative sensor performance and how much it could improve if it was as efficient as a top P&S sensor.

Dan.





« Last Edit: October 07, 2011, 11:25:24 PM by dosdan » Logged
Pages: [1]   Go Up
  Print  
 
Jump to: