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Thread: Line textures/pixellation on RAW images

  1. #1
    Senior Member velasco's Avatar
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    Default Line textures/pixellation on RAW images

    Hi all!

    I am currently encountering this problem. This happened on two separate trips. Once I imported Raw CR2 files from 5D MKII to my lightroom, realized there have this lines/grids when i zoom in. Sometimes the problem is so prominent it is visible at like 60%. Before importing when i view it at the viewer there is no problem, once it is imported it shows. I downloaded Fastone Viewer and the problem is the same when imported.



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    Is it a camera issue or my computer issue? Very odd. The Raw files from nikon D700 looks okay.

    Don't think it is viewable for online viewing but I am fearful it might show up in large prints.
    See this for an example of affected style

    Untitled by *iskandar, on Flickr


    Anyone experienced this before? Thanks for your help
    Last edited by velasco; 15th March 2013 at 04:02 PM.

  2. #2

    Default

    on mobile cant really see properly. will see again when im home.

    so cant say much. is your noise reduction switched off?

    and also u upgraded again?

  3. #3

    Default Re: Line textures/pixellation on RAW images

    Did you raise the shadow slider?
    Canon 5D MkIII|70-200 f/2.8L IS II USM|24-70 f2.8 L II USM|Σ 50 f1.4 EX DG HSM

  4. #4

    Default Re: Line textures/pixellation on RAW images

    The vertical stripes in the 2nd photo looks pretty bad, for the rest of the photos i didn't see this issue.
    This could be caused by a bad sd/ cf card, & the problem may be random. i guess it happens only in
    your raw file, & JPEG file got no such problem.
    i would suggest you to change to a new card (format it) & take a few photos. Check the photos to see whether
    they have the same issue.
    i may be wrong in this, but no harm giving it a try. good luck
    Last edited by flame angel; 15th March 2013 at 09:35 PM.

  5. #5

    Default Re: Line textures/pixellation on RAW images

    Try using the Canon software instead or LR
    Alpha

  6. #6
    Senior Member velasco's Avatar
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    Default Re: Line textures/pixellation on RAW images

    Quote Originally Posted by eleveninth View Post
    on mobile cant really see properly. will see again when im home.

    so cant say much. is your noise reduction switched off?

    and also u upgraded again?
    should be switched. I have to check the camera....which answers your next question, no, it's the school's one. hehehe

    Quote Originally Posted by dodgethis View Post
    Did you raise the shadow slider?
    No, I did not, no adjustment has taken place.

    Quote Originally Posted by flame angel View Post
    The vertical stripes in the 2nd photo looks pretty bad, for the rest of the photos i didn't see this issue.
    This could be caused by a bad sd/ cf card, & the problem may be random. i guess it happens only in
    your raw file, & JPEG file got no such problem.
    i would suggest you to change to a new card (format it) & take a few photos. Check the photos to see whether
    they have the same issue.
    i may be wrong in this, but no harm giving it a try. good luck
    I doubt it's a CF card problem since it occurs on my previous trip with a different card, this one is fresh out of the box. maybe it's the camera prob or card reader?

    Quote Originally Posted by Rashkae View Post
    Try using the Canon software instead or LR
    as in camera RAW?Okay I'll try download that program. But even when importing the RAW to Fastone viewer then, without adjusting I export it to a TIFF File, the files are botched.

  7. #7
    Senior Member velasco's Avatar
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    Default Re: Line textures/pixellation on RAW images

    ETA: Tried using RAWtherapee, grids still show when zoomd at 80% or more. Means it's not a lightroom issue i suppose

  8. #8

    Default Re: Line textures/pixellation on RAW images

    Okay lets tackle the if it shows up in the print issue. Handle EVERYTHING the way you would normally (baseline image) and the other version just print it up to print size. Okay you do not want to go purist and print the large print (what is your definition of large print ? Mine is any thing above 20 x 30 inch ; 8R to me is a normal print, 4R is a thumbnail). Assuming you do not want to pay for more than 4R to check (okay I am a cheapskate that way too - why pay for a 10R just to check for defects). Open files in PS, find an area where you can see the lines, crop out a 4inch x 6inch @300 dpi piece, select and insert into a new file give that a name n save the new file; Old file close WITHOUT saving. Find another section it the test file - u need to reopen the test file, find an area that does not show the lines, do the same 4R crop and get another new file - name that. Print the 2 4R sized files. Check the prints - what do you see ? Nothing then on your large print size it does not show. Yes you have a problem. Go deal with the prob. Google the issues it maybe so one else has thing an gotten some answers how to deal with it.

  9. #9

    Default Re: Line textures/pixellation on RAW images

    It happened to me before, forgotten it was my D300 or D700. An once off thing. Never returned. Previously I asked around, nobody knew either. I was thinking it could be the sensor or AA filter or something...
    WTB Manfrotto RC4 L Bracket

  10. #10
    Senior Member velasco's Avatar
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    Default Re: Line textures/pixellation on RAW images

    hi,
    i have consulted my prof. He said the sensor is burnt.


    I retry opening the RAW with Fastone Viewer and then saving it to TIFF and JPG without any single processing, there are no GRIDS!

    Hmmmm maybe it is the RAW conversion after all?


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