Samsung Makernote 0x0022

[Klaus_Homeister]

Hi Phil,

This Tag extends the PictureWizard-Tag with a Gamma.
Split the Long in two shorts.
The first is always 1, the second always in the range 0-3. Add the decimalpoint.
The resulting Gamma 1.0 - 1.3 fits always good to get close to the exposure of the embedded Jpeg.
(When applied after Development for finalizing).

There's another Tag coded this way. 0xA01C is too always in the range 1.0-1.3.
But this one looks not to be related to the Gamma of the image.
too often it is in a neutral 1.0 where the developed image would need a brightening and viceversa.
Don't know what this one is.

Klaus

[Phil Harvey]

Hi Klaus,

Thanks for this.  This may work for NX models, but some other models (ST96,WB350F,WB750) store 0.0 and 0.1 here.

The Samsung name for this tag is "CaptureMode".

- Phil

[Klaus_Homeister]

Hi Phil,

You're right. In Jpegs there can be a single 1.
But for example Samsung WB350F stores a long integer 65536 ... That's hex0x10000 and Gamma 1.0 in my logics.

I have extended the search to my Jpgs of NX500 I get _both_ 0x000001 (int 1) _OR_ 0x10000 (int 65536).
But in both cases the parallel stored RAW-File has a  Hex 0x10000 (int 65536) ... _for BOTH_.
So '1' is an alias for 1.0
And only in Jpegs I can find a 1.4 and 1.5.
And a complete 0 of older compact's jpgs means "not set"

And in very dark Bracketing-Jpegs:
0x50000  (int 327680)
0x80005  (int 524293)
Which I identify as '1/0.85' and '1/0.5' ...
That's when the good exposure-Jpg +-0.0EV  is already dark and EV-1.0 and EV-2.0 in next Shots of the series don't are as dark as they should be in this EV-setting compared to the first shot of the series.

When the Jpeg has a value below 1.0 it should be darkened by this Gamma for correct viewing of a series.
When it is above 1.0 the jpeg was already brightened by this gamma.
And int 1 and coded 1.0 means 'untouched'

bye
Klaus