Help with image quality- bad moire on roofs etc

[michaelhames]

Hey everyone,

I am experiencing some really bad "moire" (at least that's what I think it's called). I have attached a screen shot from a raw image I just took.

Is there anything I can do to help reduce this? I noticed when I shoot in jpeg and raw the compressed jpeg images seem to have the moire effect almost removed but it still shows up in the raw files.

Help! As this is just one example as this seems to happen frequently.

Thanks !

 

[Meta4]

I am experiencing some really bad "moire" (at least that's what I think it's called). I have attached a screen shot from a raw image I just took.

Oww ... that's the worst moire pattern I've seen.
Unfortunately it's physics and your options are limited.
This article might give you a few ideas to help.

Understanding Moiré in Photography and How to Avoid It

Learn to understand and avoid moiré in photography. Our guide provides techniques for dealing with this common digital artifact.

proedu.com

 

[MegaStoke]

Whoa, that is some intense moire.

Things I would try:
Switch to shooting 12mp DNGs and then use Lightroom’s AI Denoise/detail enhance. The 50mp mode has some weirdness to it, moire very much included.

Shoot a free pano with the 3x lens but the same framing. Hopefully the resolution increase will cut through the moire pattern.

 

[Vic Moss]

This may help with some questions.

DJI Air 3S Deep Dive - Pilot Institute

pilotinstitute.com

 

[Dale D]

Hey everyone,

I am experiencing some really bad "moire" (at least that's what I think it's called). I have attached a screen shot from a raw image I just took.

Is there anything I can do to help reduce this? I noticed when I shoot in jpeg and raw the compressed jpeg images seem to have the moire effect almost removed but it still shows up in the raw files.

Help! As this is just one example as this seems to happen frequently.

Thanks !

For what it's worth, I Googled the term "what causes moire In my photograph?" and found some helpful You Tubes.

 

[michaelhames]

Whoa, that is some intense moire.

Things I would try:
Switch to shooting 12mp DNGs and then use Lightroom’s AI Denoise/detail enhance. The 50mp mode has some weirdness to it, moire very much included.

Shoot a free pano with the 3x lens but the same framing. Hopefully the resolution increase will cut through the moire pattern.

Great tips thanks. This is actually a 12mp shot. I’ll try the free pano

 

[dajomu]

Pattern artifacts like those shown in the original post's screen captured can be caused (or made worse) by the act of rendering the image on a computer screen at a specific size. Zooming the view in or out on screen often changes the nature of the artifacts, making them stronger, weaker, or even disappear altogether. So my first line of inquiry would be to ***** the amount of patterning that's really in the image file, by viewing it at 100% and 200% in a program like Lightroom or Photoshop. Assuming there's actually some moire, you can use an Adjustment Brush in Lightroom to try to eliminate it: brush over the area where the pattern occurs and drag the Moire slider to eliminate it, That slider is under the Detail section of the adjustments that can be applied by the brush. This video shows the basic steps:

To view this content we will need your consent to set third party cookies.
For more detailed information, see our cookies page.

Accept third party cookies

.
I also note that the image as shown in the screen capture seems to have a lot of contrast; very dark shadows, such as on the car. Makes me wonder if this was shot with a polarizing filter on the lens. If so, that could exacerbate the problem.
In general, these types of patterns are not Noise, so using noise reduction techniques is not ideal.

 

[Calson]

Moire can be most apparent at smaller apertures. Using a larger aperture with a ND filter is the best solution. Shingled or tile roofs with their repeating patterns can often present moire in images and so a good subject for experimentation with aperture settings with your drone.

I have seen Moire in images of with stripped ties and striped shirts and with lace veils. Besides the roof shingles or tiles I have encountered it with palm fronds.

 

[ryguy80]

I thought I read that the Air 3S lacks a low-pass filter too, which can increase the cases of moire.

 

[Calson]

When the Nikon D800 and D800e cameras first arrived it was expected that the D800e without the filter would suffer more from Moire but it turned out to not be a problem. Nikon produced a tech guide specifically on Moire for their D800 camera.

Repeating patterns result in Moire in digital images and the smaller the aperture the more likely for it to be present in images. Landscape and architecture photographer were used to having apertures as small as possible to provide maximum depth of field and the result was a greater likelihood of having Moire present in their images.

Drone pilots are used to having to make use of ND filters and so already able to reduce light and enable a larger aperture to be used by the drone cameras.

Per Nikon "Although stopping down the aperture increases the effects of diffraction, sometimes resulting in lower resolution (page 26page 26, 3232), this same diffraction can also be used to reduce color aliasing and moiré. Adjust the aperture setting according to the priority for the photo — maximum resolution or minimum moiré"

As mentioned, diffraction can also impact image resolution although with video it is less noticeable to the viewer than with a still image captured.