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Re: CR2 RAW file conversion
Posted: 2016-03-10T13:40:37-07:00
by jose.sanpedro
well, i toke a better look and your code generates a better result. colors are better. but still different that the original, but i think i can work with this. thanks!
Re: CR2 RAW file conversion
Posted: 2016-03-10T14:16:48-07:00
by snibgo
If you are doing further processing, don't write to JPG. Use another format such as PNG or TIFF, with compression none or LZW or ZIP.
If you simply want a JPG image, you could just use the JPEG preview that is embedded in the CR2 file.
Re: CR2 RAW file conversion
Posted: 2016-03-10T14:19:28-07:00
by jose.sanpedro
how can i use the jpeg preview embedded in the cr2 file? i need jpeg output
Re: CR2 RAW file conversion
Posted: 2016-03-10T23:46:00-07:00
by snibgo
1. List metadata from exiftool:
Code: Select all
exiftool -s2 -all -b -X -fXMP:XMP foto.cr2
2. Near the bottom, it shows:
Code: Select all
Composite:PreviewImage='(Binary data 1706501 bytes, use -b option to extract)'
Composite:ThumbnailImage='(Binary data 17031 bytes, use -b option to extract)'
3. Use the "-b" option to extract either or both:
Code: Select all
exiftool -Composite:PreviewImage -b foto.cr2 >preview.jpg
exiftool -Composite:ThumbnailImage -b foto.cr2 >thumb.jpg
Re: CR2 RAW file conversion
Posted: 2016-03-11T03:32:51-07:00
by Bonzo
You can get the jpg preview using Imagemagick as well as I did it a few years ago, but can not remember how. I am sure I posted on a thread about it on the forum.
From memory it is in the EXIF data as snibgo said.
Re: CR2 RAW file conversion
Posted: 2016-03-11T06:16:50-07:00
by jose.sanpedro
thanks snibgo! thats awesome...just what i needed!
