13 Replies Latest reply: Dec 8, 2012 1:44 AM by léonie
ricky.wang Level 1 Level 1 (0 points)

Hi Every one,

Question:

How to remove the " mini Grid "

 

I don't know why I am geting this "grid" in all original RAW image, ( no grid in original jpg )

When in zoom in to 100% the grid will be gone.

export image to jpg file, no grid open in Preview, import the same jpg image to Aperture, the grid come back.

Same file have no "grid" when open in: Lightroom, photoshop and Canon Digital Photo Professional.

 

I just order a photo book on Aperture from Apple, and some of the photo in the book show the grid too....

 

Please Help.

 

Thank You

 

.Grid 1.jpg

 

Grid 2.jpg

 

Grid 3.jpg


iMac, OS X Mountain Lion (10.8.2)
  • 1. Re: Mini Grid in image
    léonie Level 9 Level 9 (51,645 points)

    minigrid.png

    Do you mean this regular pattern, most noticable in the sky regions? This looks like "ringing", a sampling artefact caused by the camera sensor. You could try to mitigate it with the raw fine tuning adjustments; try the moire-settings, see: Working with the RAW Fine Tuning Controls, i.e. Using the Moire Controls

     

    If this does not remove it completely, smooth the affected areas with a blur adjustment.

     

    Regards

    Léonie

     

    Added: check your camera settings; you may have set the sensor to a too high sensitivity.

  • 2. Re: Mini Grid in image
    ricky.wang Level 1 Level 1 (0 points)

    Thanks for the help,

    I can sure to fix few images with adjustments, but i have 500... and the grid show on the entire image, but usually more noticeable in the blue sky on this image, some other is showing on person's skin.

    I just try the "RAW Fine Turing" but no help...

  • 3. Re: Mini Grid in image
    léonie Level 9 Level 9 (51,645 points)

    minigridadj.jpg

    Why did my screenshot vanish?  Here it is again.

     

     

    I can sure to fix few images with adjustments, but i have 500.

     

    As long as the raw fine tuning adjustments do suffice, you can apply them automatically by saving the adjustment as a camera default for your camera, use the cogwheel in the raw fine tuning brick to do that. Then reprocess the raw.

     

    All other adjustments can be transferred to multiple images at once by using the "lift and stamp" tool.

     

    Since all regions of your image are affected, adjust one image perfectly, then lift the adjustment settings, select all other images that need the same correction and stamp them.

     

    Regards

    Léonie

  • 4. Re: Mini Grid in image
    ricky.wang Level 1 Level 1 (0 points)

    dear friend,

     

    "RAW Fine Truning" no help.......

  • 5. Re: Mini Grid in image
    léonie Level 9 Level 9 (51,645 points)

    "RAW Fine Truning" no help.......

    Dear friend, that I understood, and that is why I pointed out "All other adjustments can be transferred to multiple images at once by using the "lift and stamp" tool"

    You have to experiment and find out, which adjustment will help in Aperture. Have you tried, if smoothing with "Blur" will do this? If you find suitable settings, you can stamp them onto all your images at once.

     

    The big problem is, that your images are showing a mixture of "ringing" and "moire", and "ringing" is one of the worst imaging artefacts you can have. It occurs, when the camera sofware filters and samples the sensor signal incorrectly, and high-frequency terms of the image signal are cut off incorrectly and missing. There is no way to restore this missing high frequency terms, other than smoothing the image locally by blurring or estimating (using a Fourier transform) the frequency of the periodic "ringing" and using a dedicated filter to reduce it. The second method is what the "moire" controls are doing. You could try the smoothing, but it has to be brushed in locally, otherwise you will lose sharpness.

     

    Your best bet really is, to check your camera settings, if other setting will produce raw images without these artefacts. It looks like the software, that came with the camera, Canon Digital Photo Professional, makes a better job of removing camera artefacts, so you might wish to use the camera specific  software to do the raw development, before importing the images to Aperture.

     

    Léonie

  • 6. Re: Mini Grid in image
    Kirby Krieger Level 6 Level 6 (11,915 points)

    Can you make one of the RAW files available for download?

  • 7. Re: Mini Grid in image
    léonie Level 9 Level 9 (51,645 points)

    Good idea, KIrby!

  • 8. Re: Mini Grid in image
    ricky.wang Level 1 Level 1 (0 points)

    Hi Klrby/Leonie

    I very appreciate your help, I reinstall my Aperture, just to make sure it runs ok.

    I also try to take photo from my old canon 5d, Image from 5d looks OK.

    Grid only show on 5D Mkii RAW Image.

    I ask my friend to bring his 5d mk ii tomorrow, so i can try a few image from his camera too.

    Here is the link to the RAW file: (drop box)

    http://dl.dropbox.com/u/5765062/Aperture%20RAW%20Grid%20Problem/Grid%20problem.C R2

  • 9. Re: Mini Grid in image
    ricky.wang Level 1 Level 1 (0 points)

    in every adjustment, only"Blur" the image will remove the grid. but i can't just blur people's face......

    i think finding the source of the grid problem is more imortance than fix the image.

  • 10. Re: Mini Grid in image
    léonie Level 9 Level 9 (51,645 points)

    5D Mkii RAW Image

    That is interesting. I do not see this grid on any of the pictures, that I took with the same camera model.

     

    Just downloaded your image.

  • 11. Re: Mini Grid in image
    ricky.wang Level 1 Level 1 (0 points)

    Did you see the grid from the image you downloaded

  • 12. Re: Mini Grid in image
    léonie Level 9 Level 9 (51,645 points)

    Did you see the grid from the image you downloaded

    Yes, it is very dominant.

     

    And I tried some raw fine tuning on it: It seems to help, to disable the sharpening in the raw fine tuning and to raise the moire. With these settings, I can barely see the grid any more:

    Screen Shot 2012-12-08 at 09.57.37.png

     

    Perhaps you can try to reduce the sharpening in the raw fine tuning as well. This seems to emphasize the grid effect.

  • 13. Re: Mini Grid in image
    léonie Level 9 Level 9 (51,645 points)

    I compared the camera settings in the EXIF:

    Your camera is set to:

    ISO 200

    5616 × 3744 (21,0 MP)

    Firmware Version 2.0.8

     

    My camera:

    ISO 100

    5616 × 3744 (21,0 MP)

    Firmware Version 1.0.7   (looks like I need a firmware upgrade )

     

    The higher ISO setting will give a higher amount of noise, and this in combination with a high "sharpening" setting may contribute to the problem.

     

    I do not hope, that the Firmware Version 2.0.8 introduced a bug. If you have a raw image from your friends Mark II, compare the firmware versions.