Again, the fact that it can be \"ignored\" almost certainly means that the unaltered original raw data is in the file, and the setting for possible application of HTP or HTP-like alterations are merely applied to the raw file. Those that don\'t understand it or those that give the user the option do, in fact, \"ignore\" it.
\"Careful reading\" (ahem) of the language you refer to strongly indicates that some but not all conversion applications understand this secondary data that accompanies the raw data. Those applications that do may give you a choice of whether to apply it to the raw file or begin with the unmodified raw data.
Initial raw files are proprietary and may include specialized setting data. The only version that is \"standardized\" is the Adobe DNG file, which also makes allowance for inclusion of proprietary data beyond the basic sensor data.
Dan
Shasoc wrote: gdanmitchell wrote: Shasoc wrote:
My understanding is that Canon\'s HTP really does change RAW values. Thsi is what Canon says : • Highlight Tone Priority will be applied (if set in-camera) to RAW if they are processed in Canon’s Digital Photo Professional software;
• HTP is usually ignored if other third-party software is used to process EOS RAW image files, even if HTP was set in-camera
If you read this carefully, it pretty clearly tells us that the raw files are not changed when you shoot with HTP. If they were, the changes would also be visible (not \"ignored\") in the third party software.
What is almost certainly happening is that once the files are out of the camera and on your computer, the DPP software recognizes the settings that were in place in camera and applies them as the default conversion settings to the otherwise intact raw file.
It is DPP that is applying the changes. They are not in the raw files.
Dan
May be you need to read it more careful, Dan It says usually ignored. In addition for what I understood, ACR doesn\'t ignore it. It add +EV to the RAW. In other words recreates an exposure as if HTP wasn\'t used.
Socrate
Nov 02, 2016 at 05:34 PM
Previous versions of gdanmitchell's message #13788565 « Highlight Tone Priority »
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