Forgot Password
Pentax Camera Forums Home
 

Reply
Show Printable Version Search this Thread
12-06-2013, 03:38 PM   #46
Pentaxian




Join Date: Jun 2009
Location: GMT +10
Photos: Albums
Posts: 10,826
QuoteOriginally posted by robgo2 Quote
The above image is an example of exceedingly poor noise reduction
Why do people always forget that they are talking about ISO 6400 images, at close to 100% ...

12-06-2013, 03:44 PM   #47
Veteran Member




Join Date: May 2013
Posts: 304
QuoteOriginally posted by robgo2 Quote
Definitely not me. I may be obsessive, but not that obsessive.
I somehow fail to believe you, here is the video...


It is EXACTLY the same setup. So yes You are the guy....
12-06-2013, 03:59 PM   #48
Veteran Member




Join Date: Jan 2007
Location: New Mexico
Photos: Albums
Posts: 1,125
Original Poster
QuoteOriginally posted by robgo2 Quote
The above image is an example of exceedingly poor noise reduction, which is why the red cloth shows so much detail. It's easy to accomplish this, if you choose to leave the noise largely untouched, in which case the choice of software is immaterial. I have yet to see anyone post a clean example with good retention of detail. Perhaps DxO 9's Prime NR can do the trick, but it does not yet support the K-3. I might give it a try on a K-5 sample from IR.

Rob
Below are 100% crops of IR's ISO 6400 raw samples from the K-5II. The first was rendered with Photo Ninja/Noise Ninja 4 and the second with DxO 9/Prime NR. In both cases, the programs' default settings were used except for noise reduction, in which case I sought to achieve a balance between noise removal and detail retention. Unfortunately, the web jpegs do not do justice to what I see on my monitor. My take is that the DxO file is cleaner, but blotchier, and shows less detail, especially in the red cloth. The Photo Ninja file has a fine, even grain pattern and more detail. It is also brighter, which is a function of PN's superior default settings. In any event, it should be pointed out that the K-5II has significantly less noise than the K-3, and thus requires less aggressive NR. Also, I think this removes any doubt about Pentax DSLRs generally being unable to render detail in bright red subjects. The results are actually pretty decent for ISO 6400. I will continue to work on the K-3 sample and hope for something better than what I have gotten previously.

Again: Top--Photo Ninja/Noise Ninja 4
Bottom--DxO 9/Prime NR

Rob
Attached Images
   
12-06-2013, 05:53 PM   #49
Forum Member




Join Date: Oct 2010
Location: Jakarta
Photos: Gallery
Posts: 96
QuoteOriginally posted by robgo2 Quote
The results are actually pretty decent for ISO 6400. I will continue to work on the K-3 sample and hope for something better than what I have gotten previously.
Glad you've finally worked it out. In my own comparisons of IR raws (some posted here sometime ago) at 6400 the red cloth does look better on the K-52 compared to the K-3, the D7100 and the 70D. It is even almost as good as the 5D3! The K-3 is slightly less detailed than the D7100 and the 70D. However, since both the D7100 and 70D images are also slightly underexposed compared to the Pentaxes-indicating slightly different actual ISO sensitivity-I would say that against 20MP+ APS-Cs the K-3 is on par regarding the red color rendering performance.

12-06-2013, 06:01 PM   #50
Veteran Member




Join Date: Jan 2007
Location: New Mexico
Photos: Albums
Posts: 1,125
Original Poster
OK, I have been working some more (wasting time?) on the K-3 ISO 6400 sample and have come up with a reasonably good result using Photo Ninja/Noise Ninja 4. At 100%, it is not totally smooth/clean, but at normal viewing size, it is quite acceptable with a pleasing film grain look. For me, this is one of the strengths of Noise Ninja 4. The trick was to set color noise reduction as low as possible, i.e. eliminate blobs of yellow and purple but no more. Below is the 100% crop.

Rob
Attached Images
View Picture EXIF
PENTAX K-3  Photo 
12-06-2013, 06:05 PM   #51
Veteran Member




Join Date: Jan 2007
Location: New Mexico
Photos: Albums
Posts: 1,125
Original Poster
QuoteOriginally posted by Deedee Quote
I somehow fail to believe you, here is the video...

Nikon D800E vs Pentax K5 II Resolution Test part 1 - YouTube

It is EXACTLY the same setup. So yes You are the guy....
I'm going to take this a joke. HA HA!

But now you have piqued my interest, so I will have to watch the video.

Rob
Reply

Bookmarks
  • Submit Thread to Facebook Facebook
  • Submit Thread to Twitter Twitter
  • Submit Thread to Digg Digg
Tags - Make this thread easier to find by adding keywords to it!
cloth, detail, dslr, iso, k-3, k3, pentax k-3
Thread Tools Search this Thread
Search this Thread:

Advanced Search


Similar Threads
Thread Thread Starter Forum Replies Last Post
Design critique -- K-01 and the (RED) Leica M jon404 Pentax K-01 7 11-26-2013 04:14 PM
Will the K-3 automagically kill purple fringing and the like? Sagitta Pentax K-3 4 10-08-2013 03:53 PM
For Sale - Sold: PRICE REDUCED - Red K-x and Red DAL 18-55mm panoguy Sold Items 5 11-14-2012 05:38 PM
Lightroom 3 and the K-01? ScooterMaxi Jim Pentax K-01 3 04-20-2012 06:54 AM
I'm Nabeel_co and you just got me, Hook, Line, and Sinker, with the K-3 announcement. nabeel_co Welcomes and Introductions 3 04-01-2012 02:31 AM



All times are GMT -7. The time now is 07:03 AM. | See also: NikonForums.com, CanonForums.com part of our network of photo forums!
  • Red (Default)
  • Green
  • Gray
  • Dark
  • Dark Yellow
  • Dark Blue
  • Old Red
  • Old Green
  • Old Gray
  • Dial-Up Style
Hello! It's great to see you back on the forum! Have you considered joining the community?
register
Creating a FREE ACCOUNT takes under a minute, removes ads, and lets you post! [Dismiss]
Top