Approve the Cookies
This website uses cookies to improve your user experience. By using this site, you agree to our use of cookies and our Privacy Policy.
OK
Forums  •   • New posts  •   • RTAT  •   • 'Best of'  •   • Gallery  •   • Gear
Guest
Forums  •   • New posts  •   • RTAT  •   • 'Best of'  •   • Gallery  •   • Gear
Register to forums    Log in

 
FORUMS Post Processing, Marketing & Presenting Photos RAW, Post Processing & Printing 
Thread started 13 Apr 2006 (Thursday) 12:40
Search threadPrev/next
sponsored links (only for non-logged)

30D and new RAW format?

 
Jon
Cream of the Crop
Avatar
69,628 posts
Likes: 227
Joined Jun 2004
Location: Bethesda, MD USA
     
Apr 15, 2006 12:35 as a reply to  @ post 1403521 |  #16

malcolmp wrote:
Your argument is like saying the more computers you copy a file to the worse the quality gets!

The data from the sensor does go through on-chip processing, e.g. to reduce fixed pattern noise. This is one of the techniques that makes the Canon images so much cleaner than competitors. The data from the sensor can get reformatted without losing any data integrity - it's just a format.

You can add metadata without losing data integrity. It happens all the time in other areas of signal processing, data capture, etc. My company does a lot of this stuff all the time.

Malcolm

You miss the point. Regardless of what metadata's added to the raw sensor data, a RAW file contains the individual sensor cell readings, not a "true" colour. So a RAW file is dependent on the sensor layout and the camera's metadata. But the image proper isn't affected by any metadata. That may be used in post-processing, or in in-camera processing of the JPEG, but it has no effect on the raw sensor data. Long Exposure Noise Reduction may be applied to the raw signal, but that's applied on a pixel-by-pixel basis too. Again, it doesn't affect the file format. Sharpening, colour boosting, contrast changes and the like are only applied in post-processing, whether to the data stream in-camera when you're shooting JPEG or in the computer later. But the thing is, since a RAW file contains both direct sensor signal capture and camera-specific metadata, the structure and content of which changes from model to model, a "standard" RAW will lose metadata from a new camera.


Jon
----------
Cocker Spaniels
Maryland and Virginia activities
Image Posting Rules and Image Posting FAQ
Report SPAM, Don't Answer It! (link)
PERSONAL MESSAGING REGARDING SELLING OR BUYING ITEMS WITH MEMBERS WHO HAVE NO POSTS IN FORUMS AND/OR WHO YOU DO NOT KNOW FROM FORUMS IS HEREBY DECLARED STRICTLY STUPID AND YOU WILL GET BURNED.
PAYPAL GIFT NO LONGER ALLOWED HERE

  
  LOG IN TO REPLY
malcolmp
Senior Member
361 posts
Likes: 15
Joined Oct 2005
Location: Australia
     
Apr 15, 2006 15:15 |  #17

RAW data may be recorded in a sensor-specific way, but it can be stored in a different format without loss. Try this: open your raw file in Adobe Camera Raw, click the "Save..." button, and save it as a .dng file. Guess what? You've just saved the original RAW data in a new format that doesn't suck.

The DIGIC II processor is responsible for relaying the RAW data to memory and could restructure the data WITHOUT LOSS in a consistent format that is extensible. e.g. dng. Some vendors do this already e.g. Leica, Hasselblad.

There doesn't need to be a camera specific format, although there could be camera-specific meta-data. New data and information could be added for new models without breaking older software unless there was a major change, e.g. different number of bits captured. It's really not that hard guys.

The noise reduction I referred to previously was CMOS on-chip unrelated to post-processing. See the Canon webiste on CMOS technology for details.

I have half a dozen programmers working on converting wierd and specific formats for signals and other data into open and extensible formats (losslessly). Camera raw formats aren't a technical issue, Canon, Nikon et.al. just can't be stuffed making it easier.


malcolmp
α7R III | FE 16-35/4 | FE 24-105/4 | FE 35/2.8 | FE 55/1.8 | FE 85/1.8 |
MB V | EF 35/1.4L | EF 50/1.4 | EF 135/2L | EF 70-200/2.8L IS II |
m5 | 11-22 | 22/2 | 18-55 | 28/3.5 |

  
  LOG IN TO REPLY
sponsored links (only for non-logged)

4,251 views & 0 likes for this thread, 9 members have posted to it.
30D and new RAW format?
FORUMS Post Processing, Marketing & Presenting Photos RAW, Post Processing & Printing 
AAA
x 1600
y 1600

Jump to forum...   •  Rules   •  Forums   •  New posts   •  RTAT   •  'Best of'   •  Gallery   •  Gear   •  Reviews   •  Member list   •  Polls   •  Image rules   •  Search   •  Password reset   •  Home

Not a member yet?
Register to forums
Registered members may log in to forums and access all the features: full search, image upload, follow forums, own gear list and ratings, likes, more forums, private messaging, thread follow, notifications, own gallery, all settings, view hosted photos, own reviews, see more and do more... and all is free. Don't be a stranger - register now and start posting!


COOKIES DISCLAIMER: This website uses cookies to improve your user experience. By using this site, you agree to our use of cookies and to our privacy policy.
Privacy policy and cookie usage info.


POWERED BY AMASS forum software 2.58forum software
version 2.58 /
code and design
by Pekka Saarinen ©
for photography-on-the.net

Latest registered member is semonsters
977 guests, 133 members online
Simultaneous users record so far is 15,144, that happened on Nov 22, 2018

Photography-on-the.net Digital Photography Forums is the website for photographers and all who love great photos, camera and post processing techniques, gear talk, discussion and sharing. Professionals, hobbyists, newbies and those who don't even own a camera -- all are welcome regardless of skill, favourite brand, gear, gender or age. Registering and usage is free.