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Convert from RAW (canon 350D) to Jpeg > Always dark

Posted: Tue Sep 22, 2009 2:26 pm
by pepeluis
Hi all:

I'm facing serious problems on converting .cr2 (Raw format) to jpeg in high resolution.

I'm using now this sentence
nconvert -quiet -jpegtrans exif -high_res -keepfiledate -out jpeg "1.cr2"

But always I have an JPEG so much darker than:

1) The Jpeg that cames from the raw file (using other great program dcraw -e, it's easy to extract the small jpeg created by the camera when Raw has been taken)
2) The Jpeg obtained from convert raw > tiff (using again dcraw) and after tiff>jpeg.

I've tried to add -raw_brightness 2 option, but colors are not the same as the both previous examples 1) and 2)

Which is the best way to convert using nconvert from raw to jpeg mantaining the bright on the process.

Thanks

Re: Convert from RAW (canon 350D) to Jpeg > Always dark

Posted: Wed Sep 23, 2009 7:36 am
by xnview
pepeluis wrote: I'm using now this sentence
nconvert -quiet -jpegtrans exif -high_res -keepfiledate -out jpeg "1.cr2"

But always I have an JPEG so much darker than:
Could you send me the cr2? Do you use the 5.50 version?
1) The Jpeg that cames from the raw file (using other great program dcraw -e, it's easy to extract the small jpeg created by the camera when Raw has been taken)
The embedded jpeg has a different brightness than the RAW

Re: Convert from RAW (canon 350D) to Jpeg > Always dark

Posted: Sun Sep 27, 2009 2:40 pm
by pepeluis
Hi:

Sure I can send to your the . cr2 file. ¿What mail address?

Also:

I've tried to modify brightness but final result remains different. I've used brightness close to 2.0 on the example that I will send... and I can't reproduce same quality as converting first to tiff and from tiff to jpg as commented.

Thanks

Re: Convert from RAW (canon 350D) to Jpeg > Always dark

Posted: Mon Sep 28, 2009 7:05 am
by xnview
webmaster at xnview dot com