CCD "Registration" procedure?

grjohnson

grjohnson

Active member
I have a new DVX100 camera. Recently, after shooting a winter snow video, I noticed that there may be a problem with the camera's CCD alignment. I noticed that parts of the image in the red/orange spectrum stick out and appear out of alignment with the rest of the image. Below is a screen grab from the video showing the appearance:

distortcolor.jpg


When I first saw this it reminded me of how older color TV camera images looked when the camera was "out of registration" (vidicon tube alignment). Of course, that was back in the prehistoric era (1970s) when I worked in commercial television before CCD based cameras.

What I need to know is where I can obtain the technical procedures for checking/correcting the CCD alignment in the DVX100 camera? I bought the camera from a U.S. vendor, but I live in Germany and sending the camera back to the States for service would coast more (and probably cause more damage going through the APO) then would be practical. So, if anyone can steer me to resolving this issue, or has a better diagnosis of the problem, it would be greatly appreciated.
Thanks
Gaines Johnson
Munich
 
That seems to be the 4:2:0 colorsampling.
4:2:0 means that the color channels are half resolution in both the horisontal and vertical axis and makes saturated color drift.
 
You don't
PAL DV is always color sampled at 4:2:0. (And NTSC 4:1:1) One of the things that makes DV a comsumer format.

- Mikko
 
Yes, if it's shooting at 24fps, it is the NTSC model. I'm not sure what your problem is, but I do know that you must have the NTSC model.

:-\
 
HybridCreations said:
Isn't there some kind of chroma blur he can try in post to minimize it? I think I've read that elsewhere in the forum.
Click to expand...

On larger plain areas of saturated colour some "mosaic" patterning due to lower chroma sampling may be apparent. Chroma blur can help blend the edges of the mosaic and mask the distracting pattern. It won't really help small areas. In fact it may make the lower chroma resolution more apparent!

Also worth noting that if your final distribution format is a relatively low resolution domestic TV screen, or the internet, rather than a high res computer monitor or film blow-up, chances are you won't be able to see the colour smearing anyway - so don't have to worry about doing any chroma blurring.
 
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