On 8/1/22 08:48, Maarten Verberne wrote:
thanks, John, David,
the first problem from an older post is solved by using my office
program to create the files i need.....works for me.
tiff vs JPG, fair enough, it could be this specific example, so i'll
make some more and also test them in a different program.
as for disk space, well it's not that i don't have enough of it...but
still for me to archive 15x is definately pushing it.
Alas for that same reason i do not like to shoot in raw.
And i did use LZW, so you are writing i'm lucky that it was only 15x the
JPG size :)
I'll accept the default jpg settings.
Maarten
Hi, Maerten!
I shoot RAW files with my Sony A58. I process those into 16-bit/channel
TIFF files. I use the TIFF files in Hugin to make my panorama and have
Hugin output it as 16-bit/channel TIFF. Then I pull that into Luminance
HDR to produce my final JPG image. Luminance HDR does tone mapping from
16-bit to 8-bit JPG. I save my final JPG at 100% quality.
When it's all done, I keep the original RAW files, the PTO file,
Rawtherapee's settings file for each image, and the Luminance HDR
settings file. I put them all into a single folder, then use 7zip to
compress them into an archive file. The archive file goes onto my file
server, then eventually migrates to external or optical storage.
One difference between JPG and other image file formats is JPG has a
quality setting. The lower the quality setting, the smaller the
compressed file. How a particular quality setting may affect a
particular image is dependent on that image.
Ever seen an image with sharp-edge text on it, compressed it using JPG
at less-than 100% quality, and viewed the edges of the text? JPG
compression produces artifacts in such situations. Similar things can
happen when an image with blown highlights gets mapped to 8-bit,
producing an area of solid white surrounded by areas that aren't as
bright. The edge of areas can develop artifacts.
Default JPG quality depends on the program making the JPG. Some default
to 90% quality, some to 80%. Some hide image quality behind selections
like "For Web", "For Print" or "For Email".
I have panoramas that were about 2GB as 16-bit TIFFs that became about
600-700MB as 100% quality JPGs. So what quality setting are your JPGs at
to give you a 15x difference?
--
David W. Jones
[email protected]
wandering the landscape of god
http://dancingtreefrog.com
My password is the last 8 digits of π.
--
A list of frequently asked questions is available at:
http://wiki.panotools.org/Hugin_FAQ
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