How Do I "Re-Write" a Canon RAW file or a Nikon RAW File, Undetected

I need to "re-write" a native camera RAW file and do it undetected.
Can Aperture or any software tool, on any platform accomplish this goal?

Dear kgelner,
Any thought to a software tool that can make changes to a RAW file, then write them back to that secretly encoded data language? That is why I posted to this board.
Here are my responses to your own post above. Most of your statements below are not based on facts. (i.e. “compacted shirts” and “enough room”) We are talking about taking digital pictures into court where such statements will be directly challenged. Please throw me a bone here and post some facts!
Your Statement
The problem with that argument is that you are not in fact losing anything - you are only compressing it. And not in the JPG sense.
My Response
A 48-bit image contains a maximum of 281,474,976,710,656 trillion possible colors.
A 24 bit image contains a maximum of 16,777,216 million possible colors.
Of course you are losing data if you eliminate 281,474,959,933,440 possible colors from the equation and force the rest to display within the 24-bit range! The 48-bit colors are not compressed, their actual numeric color values are being converted to a color within the 24-bit range.
Your Statement
If you think about what moving from a 48-bit tonal range to a 24-bit tonal range means
in practical terms, all it does is compress the tonal range a bit. So you still have everything that was there - it's just that some things that were very close before become jammed together. It's like a shirt in an overstuffed suitcase, it's simply compacted but that does not mean anything is gone - all your clothes are still there even if it would seem when unpacked they would not all be in the suitcase.
My Response
You think that that removal of 65,280 possible variables within a tonal range scale is “a bit?” A 24-bit tonal range scale is limited to 256. During the conversion from 48-bit to 24-bit there is a permanent elimination of possible color values and this severely limits the color/tonal range when the conversion is completed.
For others that read this post:
A 24-bit tonal range is an actual numeric scale from 0 to 255.
A 48-bit tonal range is an actual numeric scale from 0 to 65,535.
Your Statement
Furthermore in some cases it could be that you would be able to go the other way, from JPG to TIFF and get the original tonal range. All it would require is enough "room" between tonal ranges.
My Response
You can not “go the other way” and get more out of the picture! I have to ask you where would the “room” come from and where would the factual data values come from? The tonal ranges listed above are absolute. Any “additional” colors would be interpolated from existing color/tonal values during the conversion from 24-bit to 48-bit. There would be more data but none of it original.
You Stated
Consider a picture of a wall with black and white squares in a flat light. That's going to occupy the same tonal range in either a TIFF or a JPG. White and Black are still absolutes in the picture, it's just that the absolute is represented by a slightly different number.
My Response
The absolute value for black is the same. The value for white is different by exactly 281,474,959,933,440 colors.
For others that read this post:
Inside a 24 bit image, black is 0,0,0, white is 255, 255, 255.
Inside a 48 bit image, black is 0,0,0 white is 65535, 65535, 65535.
Your Statement
A very esoteric argument to be sure, have you heard of anyone actually getting away with this argument with real-life JPG's attempted to be used in court?
My Response
I must agree a very esoteric discussion indeed! I have not heard of anyone using a comparison between the two formats. Our courts are a more than a bit behind the times when it comes to digital imaging. RAW files have been used in court for a couple of years now and they have yet to be challenged. As technology evolves, so will the courts. As new technology is introduced, older methods are used less and considered less reliable.
An example of this is our use of DNA, Deoxyribo Nucleic Acid, as a means of identification. DNA is considered more reliable that witness testimony! There have been about 175 cases to date where DNA has proven that a person was wrongly convicted! (So much for the photographer’s testimony!)
I really want to come back to my original question and the reason I posted on this board. Is there any software tool that can make changes to a RAW file, then write them back to that secretly encoded data language?

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How Do I "Re-Write" a Canon RAW file or a Nikon RAW File, Undetected

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