Quote:
Originally Posted by multiweb
Thanks for commenting Phil. I was hoping you'd pick up on this post as I need some (a lot of) help.  I read your book cover to cover a couple of times but couldn't find much in term of processing.
As you've picked up there are still a lot of things wrong with my processing. Noise, green cast and color balance issues.
My white balance is set and fixed to Daylight. ISO3200 15s subs. I shoot in RAW full frame. Color Space AdobeRGB (not sRGB). There are only two modes.
I use Adobe Lightroom 4 (LR4) and LR Timelapse (LRT). I have posted in the bug report section of the LRT forums but the bloke is on holydays at the moment so I'll wait.
I adjust the colors in LR4 .It uses Camera raw 7. I had to use the temperature, tint, shadows, exposure sliders to tweak the histogram. It is not ideal but these are the only parameters that are successfuly saved to the XMP files and read back by LRT.
The Tone curves (per R,G & B Channels) are not read back in LRT so it doesn't work when I interpolate and create all the keyframes in LRT. The issue being that even if you increase the frame density the color balance does change during the night and the histogram 'flickers' blue/green/red in between so you see that change of colors from one frame to the other. Could also be background color noise which I haven't taken care of.
So that's what I'm still to work out. Grenn cast and proper color balance. Do you use LR4/LRT? I have CS6 on pre-order coming mid-may or about. I'm hoping Bridge CS6 will have he functionality to Tone Curve individual Channels. CS5.5 doesn't do it at this stage.
If you have an easy solution or how to I's love to hear about it. |
jeepers.. you've gone *way* past beginner processing of timelapse! most of the content of my book was written second half of last year and i hadn't even tried LR Timelapse then so was in no position to write about it! have you seen gunther wegner's book as well? probably still doesn't answer your question.
my processing is *much* simpler than yours.. so either the colour issues are there in your files to begin with or all your complicated processing has introduced it. next time you could shoot raw+jpg and see if the colour flicker is there in a jpg sequence. or just export a simple sequence from the RAW files with no tampering of colour at all and see how that looks?
daylight white balance should be fine.. that's what i generally use for the dark part of the sequence. i don't do any tweaking over time of white balance/tint/colour tone curves outside twilight. just one setting kept constant throughout dark part of night.
i dare say the sequence is a little underexposed which probably exacerbates the problem.. lots of colour in the shadow noise. try 30 second frames.. (or a faster lens :-).
could try desaturating a little, apply colour noise reduction.. hmm.. i'm just about out of ideas. i think the small sensor and pixels in your nex5 are probably your biggest limitation at this point. i don't think your processing skills need any more help!
[edit.. nex5 pixels look similar size to other cropped sensor dslrs.. but still looks a bit like a sensor performance issue to me..]
cheers
phil