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Looking for high ISO A77 RAW

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FineArt View Drop Down
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Post Options Post Options   Quote FineArt Quote  Post ReplyReply Direct Link To This Post Posted: 19 January 2013 at 16:37
 



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FineArt View Drop Down
Senior Member
Senior Member

Joined: 28 July 2007
Country: Canada
Location: Alberta
Status: Offline
Posts: 1692
Post Options Post Options   Quote FineArt Quote  Post ReplyReply Direct Link To This Post Posted: 19 January 2013 at 19:27
I just downloaded Sony A99 RAW ISO6400 from imaging resource. I did a RGBL split, NR, sharpen, re-combine.

Here are 3 100% crops. Compare them to the same file jpg at Imaging resource. Its a big difference.

http://farm9.staticflickr.com/8357/8395063175_197342b41d_o.jpg


http://farm9.staticflickr.com/8495/8395063227_6dba0be2d9_o.jpg


http://farm9.staticflickr.com/8090/8395063303_06438f6c3e_o.jpg

50% crop
http://farm9.staticflickr.com/8043/8395095985_82f570f8f8_o.jpg


ISO6400! I'll call this Arthur's method.

Attached is a screenshot of the red channel before and after NR. Each channel has it's own noise.

http://farm9.staticflickr.com/8332/8397000750_8eda888755_o.jpg

Edited by FineArt - 20 January 2013 at 01:05
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FineArt View Drop Down
Senior Member
Senior Member

Joined: 28 July 2007
Country: Canada
Location: Alberta
Status: Offline
Posts: 1692
Post Options Post Options   Quote FineArt Quote  Post ReplyReply Direct Link To This Post Posted: 22 January 2013 at 01:49
I just got a reply over at LuLa that Bruce Fraser published by channel noise reduction and sharpening many years back.

http://www.luminous-landscape.com/forum/index.php?topic=74352.0

So it's been done and it works.
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