color of anim. cels when transferred to tv?

[maxhondur]

Hello,

I've done some searching, and haven't found much on this.. I hope I'm posting this in the right place.

Why does an actual anime cel, recent and old, always look different(in terms of color) than the actual transfer(vhs, dvd, tv, etc)? What kind of processes filter the image, and is there any set/sets of avisynth filters that can accurately emulate these effects?

In essence, I guess, I'm wondering if there's a filter that can take a gif/bitmap set, and make it look as if it were sent through the cables/animation process that alters the colors. I've tried manually lowering saturation, levels, etc with tweak, but haven't found anything that quite matches. I was hoping, at least, that some insight into the actual process would clue me in to the correct direction. Any info would be appreciated, and thanks!

[lamer_de]

I highly doubt coloured cels are used in the making of an recent anime. Digital colouring is infinitely faster and cheaper. I also wonder how you got access to actual production cels. I somehow doubt the cels usually sold were used in the production, but are replicas.
However, look here (http://forum.doom9.org/showthread.php?t=98467&highlight=colourlike) and here (http://forum.doom9.org/showthread.php?t=96308&highlight=colourlike).

CU,
lamer_de

[mg262]

My understanding (very limited, largely derived from searching for the issue) was that the original cels were genuinely sold. It's possible that the sellers attempt to create this impression by only creating a single copy of any given cel.

Why does an actual anime cel, recent and old, always look different(in terms of color) than the actual transfer(vhs, dvd, tv, etc)? What kind of processes filter the image, and is there any set/sets of avisynth filters that can accurately emulate these effects?If you could post a scan of a cel together with the corresponding image from, say, a DVD, then we can try and figure this out... although one has to remember that the scanning itself will involve some colour model/distortion.

[Mug Funky]

cels are shot on film before being shown on TV.

the main difference on the DVD is loss from the characteristics of the film used. sometimes there's not much at all.

my housemate has an '80s Astroboy cel (if it'd been '60s astroboy i'd have belted him with a blunt object) that has strikingly similar colours to the transfer used for the DVDs, in spite of generational loss from the various forms the video took after being shot on film. it's a matter of how good the film stock is and how good the telecine transfer was.

though given a scan of the cel and a corresponding frame of video you could come up with a correction filter... not sure how useful it'd be because the video would likely have other problems (grain, blur, clipping).

[edit]

for fun one day years ago i tried to scan my biggest painting... i got through 10 full 300dpi scans before giving up. the colour was very different from the 200 asa print i'd scanned though. correcting the difference proved difficult though.