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Cropping a .RAW file and re-saving as a .RAW file?

GunMan 502 April 12, 2012 at 08:30 PM in Tech & Electronics (2)
I have tons of .RAW files that contain only a very small area of interest and the rest needs to be cropped off (to save on storage). After the crop, I want to re-save as a .RAW file. I have the latest Photoshop. However, I cannot figure out how to do this.
Thanks!!!

19 Comments

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#16
Quote from Rebound View Post :
First you say TIFF, then you say "lossless jpeg." and you said it was "based on" these formats. Well, English and French are "based on" Latin. Does that mean everybody who speaks English also speaks Latin and French?
TIFF files can contain multiples types of image data and compression schemes. Tiff files can even contain multiple images, much like a PDF. JPEG compression is one of many means of compressing images in TIFF files. TIFFs can also be containers for a variety of different image types.

Also, English is a Germanic language and not based on Latin. The "Romantic" languages are based on Latin, e.g. Spanish, French, Portuguese and Italian. To that extent, the romantic languages have a lot of interchangeability in grammar, syntax and vocabulary.
Last edited by kakomu April 14, 2012 at 10:37 AM
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#17
Quote from kakomu View Post :
Also, English is a Germanic language and not based on Latin. The "Romantic" languages are based on Latin, e.g. Spanish, French, Portuguese and Italian. To that extent, the romantic languages have a lot of interchangeability in grammar, syntax and vocabulary.
Ok, so we all understand German perfectly. Got it. And the French and Italians understand one another.

You can't help yourself. You totally miss the picture. No, a RAW file from a Nikon isn't the same as one from a Canon. They may be "based on" some spec, but it doesn't matter if it doesn't work.
Last edited by Rebound April 15, 2012 at 09:44 AM
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#18
Quote from Rebound View Post :
Ok, so we all understand German perfectly. Got it. And the French and Italians understand one another.
Or, maybe your analogy wasn't nearly as apt as you thought it was.

Quote from Rebound View Post :
You can't help yourself. You totally miss the picture. No, a RAW file from a Nikon isn't the same as one from a Canon. They may be "based on" some spec, but it doesn't matter if it doesn't work.
I dunno, I think you're the one that's missing the picture. The image data in a RAW file is using well-documented, preexisting image formats. All sources point to them using the Tiff standard, surrounded by non-standard metadata. The existence of formats like mraw and sraw show that the image data isn't merely dumped directly from the sensor (that is to say, the image data is processed).

People have already picked apart RAW files and shown exactly what it is.
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#19
Quote from Rebound View Post :
Ok, so we all understand German perfectly. Got it. And the French and Italians understand one another.

You can't help yourself. You totally miss the picture. No, a RAW file from a Nikon isn't the same as one from a Canon. They may be "based on" some spec, but it doesn't matter if it doesn't work.
You are totally missing his point and making yourself look like a jerk in the process.
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#20
Quote from redmaxx View Post :
You are totally missing his point and making yourself look like a jerk in the process.
JPEG files follow a specification, and RAW does not. When Canon's next EOS comes out, you can be certain that its JPEG files will be readable in dozens of programs, but the RAW files will not be.

Justt because a file name ends with .RAW does not mean it's somehow the same as another. RAW files are manufacturer-specific:
A RAW file is a file format created by a manufacturer to contain the (actual) raw data from a digital camera. Currently each manufacturer's format is proprietary, different and typically has multiple variations for different camera models.
http://www.openraw.org/info/

According to the author of the dcraw RAW file converter, who reverse-engineers all the RAW formats:
"raw" is an English word, not an acronym or file format. "raw photo" should be translated with the same adjective that you would use for "crude oil" or "raw materials".

There are dozens of raw photo formats: CRW, CR2, MRW, NEF, RAF, etc. "RAW Format" does not exist; it is an illusion created by dcraw's ability to read all raw formats.
http://www.cybercom.net/%7Edcoffin/dcraw/

Don't you think he would know? He's the guy who cracks all of their encryption so that Linux can open RAW files.

Does this matter? Absolutely. The 10,000 or 100,000 RAW images you're saving might be lost to software obsolescence in ten or twenty years.
Last edited by Rebound April 16, 2012 at 08:52 AM
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