Whip Pan Artifacts

[Jeff Brue]

So I've been running through the footage from the test shoot we did last week, and for the most part I'm falling a little bit in love with the imagery in post....1 click greens screens, low noise, good range... The only thing I've noticed so far is this below. Now I understand the math behind a bayer pattern sensor and I've developed my own tricks for dealing with this artifact off of Phantoms and our Medula's, what I'm wondering is can we expect to be able to flag high motion scenes in RedCine to possiblly look at more surrounding pixel groups to level off these lines ? The big problem area is particuarly the orange/yellow head light.

Whip_Pan_Image

[Kevin Halverson]

Its really hard to tell from a single frame grab how this is going to read in motion. Can you post a link to a few seconds of this shot?

[Jeff Brue]

As with anything getting a couple seconds of 4k or 2k material up is rather painful. If someone wants to host they're more than welcome I have it at a 4k tiff sequence right now and will put it to whatever. In regards to seeing it in motion, it'll be a problem on a lot of TV sets as it looks suspiciously like 3:2 and a lot of consumer Plasma's and LCDs process to remove it (again personal experiance with other CMOS cameras that have the same issue).

[Matt Uhry]

That does not look necessarily abnormal to me, parts of the car's reflector are very bright, hence the stripes. It's hard to tell from this frame. Any more examples? does this look at all odd in motion?

Matt Uhry
www.mattuhry.com

[Poi Boy]

I'll bet it looks just fine in motion.
Aloha
-A

[Seung Han]

can you upload two or three sequential uncompressed files? Also some information about how this was shot...

[jbeale]

I assume we're discussing the horizontal orange stripes on the turn signal? Is that really a camera artifact? What does that area look like when the camera is not in motion? For example, on many cars, the yellow plastic area over the turn signal has a ridged texture to spread light around, so I would expect to see this sort of thing regardless of camera. But if this particular area is smooth when not panning, then I assume it is the camera.

Edit: zooming into it in Photoshop shows the stripes are slightly more than 6 pixels apart. That is not a bayer artifact, it's too large. It seems mostly likely the real-life pattern of the turn signal light, turned into horizontal lines by the pan motion.

[Mike Prevette]

Looks fine to me. It's exactly as a blown highlight would read on film.

_mike

[kmikami]

No rolling shutter skew is visible! That's promising.

[_BK]

I have been closely looking at all the footage so far as well trying to spot wip pan artifacts as they can wreak havoc with auto 3D tracking software. So far I have seen nothing out of the ordinary and I think that this image shows the same. I think what you are seeing is the actual shape of the Jeeps turn signals not a whip pan artifact. If it were an artifact other areas of the frame would show it... like the antenna, or the license plate, tire, ect.