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Alternative Imaging Methods
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Old December 26th, 2004, 04:22 AM   #16
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this is brilliant, valeriu! Yesterday I spent some time looking for some kind of lossless compression, and I read about SPIHT
I think it's quite good, only problem I'm not sure final cut can handle it.

BITJAZZ seems much better, since it is FCP compatible, and they claim image won't be degraded at all. (actually I think it will, but if it's not noticeable that's fine for me)

for the sensor the best I found is the SI 3170 rgb (2056x1544, 12bit, 66db dynamic range), but if someone knows of a better sensor at a reasonable price just let me know.
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Old December 26th, 2004, 06:12 AM   #17
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it seems that the sensor in 3170 in already 3 years old, but the sensor in 3300 is very new, so I belivey 3300 or other camera based on Micron 's sensor will produce better image quality.
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Old December 26th, 2004, 07:49 PM   #18
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Pixlelink have some interesting cameras:
The pixel pitch is small (3.5microns), so... more noise...
I like their interface and in software apart from LUTs you can also assign kneee points where the exposure time can be increased/decreased according to a luminace threshold.
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Old December 27th, 2004, 08:31 AM   #19
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David and all,
It seems like the group is answering your questions very well. Ideally, if your projection like is color balanced (full spectrum) then you don't want to do much correction when you digitize assuming that the final film is already shot with the effects that are intended.

The data rate numbers are easy for storage - the image H * W * fps (either 24 or 30) * #bytes. 8 bit data is one byte, 10 or 12 depends on whether there is packing - two bytes with no packing 1.5bytes with packing.

The 3170 is not what you want - the 3300 is a good low cost solution, especially when frame rate is not important. You want low noise. There will be a new version of the SI-6600 out in about a month that will be lower noise - that is great for this application since there is quite a bit of resolution to mess with (2110x3002) although the aspect ratio is a bit unusual.

The scoop from other threads is that if you are going to do gamma correction, you probably want at least 10 bits prior to processing even if you end up at 24 bit color before YUV conversion.

Please ignore SPIHT for this application. Cineform's compression might be very useful - they understand appropriate losses for this application.
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