Re: [OM] Digital Noise

[Mike Gordon via olympus]

<<Is there any software which can give a measure of the noise in an image ?  I
<<imagine noise reduction software can do this.


Well kinda sorta.  One way to standardize the image is just keep the lens cap 
on at given ISO, exposure time.  The image then can be pushed by "x" amount to 
bring up the noise and this does correlate to visible noise in pushed shadows 
or the hot pixel noise seen in A7RII---oddly much much worse than  
A7R---perhaps due to BSI  sensor.  The new firmware alters the Raw file--am not 
sure it is that much better, just different. Arrgh--don't like that or 
understand that.

https://dl.dropboxusercontent.com/u/524499/a7rii-d800-ISO3200-LENR-OFF.jpg

Noise sd or variance calculation--easier with grey scale obviously. 


http://www.kyxk.net/mwg-internal/de5fs23hu73ds/progress?id=C4st2ZUXDNGB4bf4-MzZ-1X7lJt5UXAEf-NHjzvW0x4,&dl

http://www.cambridgeincolour.com/tutorials/image-noise-2.htm

Please turn down the NOISE  in OM A7rII, Sony, Mike
-- 
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